WebSVN - shark - Blame - Rev 55 - /shark/trunk/ports/mesa/src/image.c

Rev	Author	Line No.	Line
55	pj	1	/* $Id: image.c,v 1.1 2003-02-28 11:42:02 pj Exp $ */
		2
		3	/*
		4	* Mesa 3-D graphics library
		5	* Version: 4.1
		6	*
		7	* Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
		8	*
		9	* Permission is hereby granted, free of charge, to any person obtaining a
		10	* copy of this software and associated documentation files (the "Software"),
		11	* to deal in the Software without restriction, including without limitation
		12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
		13	* and/or sell copies of the Software, and to permit persons to whom the
		14	* Software is furnished to do so, subject to the following conditions:
		15	*
		16	* The above copyright notice and this permission notice shall be included
		17	* in all copies or substantial portions of the Software.
		18	*
		19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
		20	* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
		21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
		22	* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
		23	* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
		24	* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
		25	*/
		26
		27	#include "glheader.h"
		28	#include "colormac.h"
		29	#include "context.h"
		30	#include "image.h"
		31	#include "imports.h"
		32	#include "histogram.h"
		33	#include "macros.h"
		34	#include "mmath.h"
		35	#include "pixel.h"
		36	#include "mtypes.h"
		37
		38
		39	/*
		40	* These are the image packing parameters for Mesa's internal images.
		41	* That is, _mesa_unpack_image() returns image data in this format.
		42	* When we execute image commands (glDrawPixels, glTexImage, etc)
		43	* from within display lists we have to be sure to set the current
		44	* unpacking params to these values!
		45	*/
		46	const struct gl_pixelstore_attrib _mesa_native_packing = {
		47	1, /* Alignment */
		48	0, /* RowLength */
		49	0, /* SkipPixels */
		50	0, /* SkipRows */
		51	0, /* ImageHeight */
		52	0, /* SkipImages */
		53	GL_FALSE, /* SwapBytes */
		54	GL_FALSE, /* LsbFirst */
		55	GL_FALSE, /* ClientStorage */
		56	GL_FALSE /* Invert */
		57	};
		58
		59
		60
		61	/*
		62	* Flip the 8 bits in each byte of the given array.
		63	*
		64	* XXX try this trick to flip bytes someday:
		65	* v = ((v & 0x55555555) << 1) \| ((v >> 1) & 0x55555555);
		66	* v = ((v & 0x33333333) << 2) \| ((v >> 2) & 0x33333333);
		67	* v = ((v & 0x0f0f0f0f) << 4) \| ((v >> 4) & 0x0f0f0f0f);
		68	*/
		69	static void
		70	flip_bytes( GLubyte *p, GLuint n )
		71	{
		72	register GLuint i, a, b;
		73
		74	for (i=0;i<n;i++) {
		75	b = (GLuint) p[i]; /* words are often faster than bytes */
		76	a = ((b & 0x01) << 7) \|
		77	((b & 0x02) << 5) \|
		78	((b & 0x04) << 3) \|
		79	((b & 0x08) << 1) \|
		80	((b & 0x10) >> 1) \|
		81	((b & 0x20) >> 3) \|
		82	((b & 0x40) >> 5) \|
		83	((b & 0x80) >> 7);
		84	p[i] = (GLubyte) a;
		85	}
		86	}
		87
		88
		89	/*
		90	* Flip the order of the 2 bytes in each word in the given array.
		91	*/
		92	void
		93	_mesa_swap2( GLushort *p, GLuint n )
		94	{
		95	register GLuint i;
		96
		97	for (i=0;i<n;i++) {
		98	p[i] = (p[i] >> 8) \| ((p[i] << 8) & 0xff00);
		99	}
		100	}
		101
		102
		103
		104	/*
		105	* Flip the order of the 4 bytes in each word in the given array.
		106	*/
		107	void
		108	_mesa_swap4( GLuint *p, GLuint n )
		109	{
		110	register GLuint i, a, b;
		111
		112	for (i=0;i<n;i++) {
		113	b = p[i];
		114	a = (b >> 24)
		115	\| ((b >> 8) & 0xff00)
		116	\| ((b << 8) & 0xff0000)
		117	\| ((b << 24) & 0xff000000);
		118	p[i] = a;
		119	}
		120	}
		121
		122
		123
		124
		125	/*
		126	* Return the size, in bytes, of the given GL datatype.
		127	* Return 0 if GL_BITMAP.
		128	* Return -1 if invalid type enum.
		129	*/
		130	GLint _mesa_sizeof_type( GLenum type )
		131	{
		132	switch (type) {
		133	case GL_BITMAP:
		134	return 0;
		135	case GL_UNSIGNED_BYTE:
		136	return sizeof(GLubyte);
		137	case GL_BYTE:
		138	return sizeof(GLbyte);
		139	case GL_UNSIGNED_SHORT:
		140	return sizeof(GLushort);
		141	case GL_SHORT:
		142	return sizeof(GLshort);
		143	case GL_UNSIGNED_INT:
		144	return sizeof(GLuint);
		145	case GL_INT:
		146	return sizeof(GLint);
		147	case GL_FLOAT:
		148	return sizeof(GLfloat);
		149	default:
		150	return -1;
		151	}
		152	}
		153
		154
		155	/*
		156	* Same as _mesa_sizeof_packed_type() but we also accept the
		157	* packed pixel format datatypes.
		158	*/
		159	GLint _mesa_sizeof_packed_type( GLenum type )
		160	{
		161	switch (type) {
		162	case GL_BITMAP:
		163	return 0;
		164	case GL_UNSIGNED_BYTE:
		165	return sizeof(GLubyte);
		166	case GL_BYTE:
		167	return sizeof(GLbyte);
		168	case GL_UNSIGNED_SHORT:
		169	return sizeof(GLushort);
		170	case GL_SHORT:
		171	return sizeof(GLshort);
		172	case GL_UNSIGNED_INT:
		173	return sizeof(GLuint);
		174	case GL_INT:
		175	return sizeof(GLint);
		176	case GL_FLOAT:
		177	return sizeof(GLfloat);
		178	case GL_UNSIGNED_BYTE_3_3_2:
		179	return sizeof(GLubyte);
		180	case GL_UNSIGNED_BYTE_2_3_3_REV:
		181	return sizeof(GLubyte);
		182	case GL_UNSIGNED_SHORT_5_6_5:
		183	return sizeof(GLushort);
		184	case GL_UNSIGNED_SHORT_5_6_5_REV:
		185	return sizeof(GLushort);
		186	case GL_UNSIGNED_SHORT_4_4_4_4:
		187	return sizeof(GLushort);
		188	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
		189	return sizeof(GLushort);
		190	case GL_UNSIGNED_SHORT_5_5_5_1:
		191	return sizeof(GLushort);
		192	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
		193	return sizeof(GLushort);
		194	case GL_UNSIGNED_INT_8_8_8_8:
		195	return sizeof(GLuint);
		196	case GL_UNSIGNED_INT_8_8_8_8_REV:
		197	return sizeof(GLuint);
		198	case GL_UNSIGNED_INT_10_10_10_2:
		199	return sizeof(GLuint);
		200	case GL_UNSIGNED_INT_2_10_10_10_REV:
		201	return sizeof(GLuint);
		202	case GL_UNSIGNED_SHORT_8_8_MESA:
		203	case GL_UNSIGNED_SHORT_8_8_REV_MESA:
		204	return sizeof(GLushort);
		205	default:
		206	return -1;
		207	}
		208	}
		209
		210
		211
		212	/*
		213	* Return the number of components in a GL enum pixel type.
		214	* Return -1 if bad format.
		215	*/
		216	GLint _mesa_components_in_format( GLenum format )
		217	{
		218	switch (format) {
		219	case GL_COLOR_INDEX:
		220	case GL_COLOR_INDEX1_EXT:
		221	case GL_COLOR_INDEX2_EXT:
		222	case GL_COLOR_INDEX4_EXT:
		223	case GL_COLOR_INDEX8_EXT:
		224	case GL_COLOR_INDEX12_EXT:
		225	case GL_COLOR_INDEX16_EXT:
		226	case GL_STENCIL_INDEX:
		227	case GL_DEPTH_COMPONENT:
		228	case GL_RED:
		229	case GL_GREEN:
		230	case GL_BLUE:
		231	case GL_ALPHA:
		232	case GL_LUMINANCE:
		233	case GL_INTENSITY:
		234	return 1;
		235	case GL_LUMINANCE_ALPHA:
		236	return 2;
		237	case GL_RGB:
		238	return 3;
		239	case GL_RGBA:
		240	return 4;
		241	case GL_BGR:
		242	return 3;
		243	case GL_BGRA:
		244	return 4;
		245	case GL_ABGR_EXT:
		246	return 4;
		247	case GL_YCBCR_MESA:
		248	return 2;
		249	default:
		250	return -1;
		251	}
		252	}
		253
		254
		255	/*
		256	* Return bytes per pixel for given format and type
		257	* Return -1 if bad format or type.
		258	*/
		259	GLint _mesa_bytes_per_pixel( GLenum format, GLenum type )
		260	{
		261	GLint comps = _mesa_components_in_format( format );
		262	if (comps < 0)
		263	return -1;
		264
		265	switch (type) {
		266	case GL_BITMAP:
		267	return 0; /* special case */
		268	case GL_BYTE:
		269	case GL_UNSIGNED_BYTE:
		270	return comps * sizeof(GLubyte);
		271	case GL_SHORT:
		272	case GL_UNSIGNED_SHORT:
		273	return comps * sizeof(GLshort);
		274	case GL_INT:
		275	case GL_UNSIGNED_INT:
		276	return comps * sizeof(GLint);
		277	case GL_FLOAT:
		278	return comps * sizeof(GLfloat);
		279	case GL_UNSIGNED_BYTE_3_3_2:
		280	case GL_UNSIGNED_BYTE_2_3_3_REV:
		281	if (format == GL_RGB \|\| format == GL_BGR)
		282	return sizeof(GLubyte);
		283	else
		284	return -1; /* error */
		285	case GL_UNSIGNED_SHORT_5_6_5:
		286	case GL_UNSIGNED_SHORT_5_6_5_REV:
		287	if (format == GL_RGB \|\| format == GL_BGR)
		288	return sizeof(GLushort);
		289	else
		290	return -1; /* error */
		291	case GL_UNSIGNED_SHORT_4_4_4_4:
		292	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
		293	case GL_UNSIGNED_SHORT_5_5_5_1:
		294	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
		295	if (format == GL_RGBA \|\| format == GL_BGRA \|\| format == GL_ABGR_EXT)
		296	return sizeof(GLushort);
		297	else
		298	return -1;
		299	case GL_UNSIGNED_INT_8_8_8_8:
		300	case GL_UNSIGNED_INT_8_8_8_8_REV:
		301	case GL_UNSIGNED_INT_10_10_10_2:
		302	case GL_UNSIGNED_INT_2_10_10_10_REV:
		303	if (format == GL_RGBA \|\| format == GL_BGRA \|\| format == GL_ABGR_EXT)
		304	return sizeof(GLuint);
		305	else
		306	return -1;
		307	case GL_UNSIGNED_SHORT_8_8_MESA:
		308	case GL_UNSIGNED_SHORT_8_8_REV_MESA:
		309	if (format == GL_YCBCR_MESA)
		310	return sizeof(GLushort);
		311	else
		312	return -1;
		313	default:
		314	return -1;
		315	}
		316	}
		317
		318
		319	/*
		320	* Test if the given pixel format and type are legal.
		321	* Return GL_TRUE for legal, GL_FALSE for illegal.
		322	*/
		323	GLboolean
		324	_mesa_is_legal_format_and_type( GLenum format, GLenum type )
		325	{
		326	switch (format) {
		327	case GL_COLOR_INDEX:
		328	case GL_STENCIL_INDEX:
		329	switch (type) {
		330	case GL_BITMAP:
		331	case GL_BYTE:
		332	case GL_UNSIGNED_BYTE:
		333	case GL_SHORT:
		334	case GL_UNSIGNED_SHORT:
		335	case GL_INT:
		336	case GL_UNSIGNED_INT:
		337	case GL_FLOAT:
		338	return GL_TRUE;
		339	default:
		340	return GL_FALSE;
		341	}
		342	case GL_RED:
		343	case GL_GREEN:
		344	case GL_BLUE:
		345	case GL_ALPHA:
		346	case GL_INTENSITY:
		347	case GL_LUMINANCE:
		348	case GL_LUMINANCE_ALPHA:
		349	case GL_DEPTH_COMPONENT:
		350	switch (type) {
		351	case GL_BYTE:
		352	case GL_UNSIGNED_BYTE:
		353	case GL_SHORT:
		354	case GL_UNSIGNED_SHORT:
		355	case GL_INT:
		356	case GL_UNSIGNED_INT:
		357	case GL_FLOAT:
		358	return GL_TRUE;
		359	default:
		360	return GL_FALSE;
		361	}
		362	case GL_RGB:
		363	case GL_BGR:
		364	switch (type) {
		365	case GL_BYTE:
		366	case GL_UNSIGNED_BYTE:
		367	case GL_SHORT:
		368	case GL_UNSIGNED_SHORT:
		369	case GL_INT:
		370	case GL_UNSIGNED_INT:
		371	case GL_FLOAT:
		372	case GL_UNSIGNED_BYTE_3_3_2:
		373	case GL_UNSIGNED_BYTE_2_3_3_REV:
		374	case GL_UNSIGNED_SHORT_5_6_5:
		375	case GL_UNSIGNED_SHORT_5_6_5_REV:
		376	return GL_TRUE;
		377	default:
		378	return GL_FALSE;
		379	}
		380	case GL_RGBA:
		381	case GL_BGRA:
		382	case GL_ABGR_EXT:
		383	switch (type) {
		384	case GL_BYTE:
		385	case GL_UNSIGNED_BYTE:
		386	case GL_SHORT:
		387	case GL_UNSIGNED_SHORT:
		388	case GL_INT:
		389	case GL_UNSIGNED_INT:
		390	case GL_FLOAT:
		391	case GL_UNSIGNED_SHORT_4_4_4_4:
		392	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
		393	case GL_UNSIGNED_SHORT_5_5_5_1:
		394	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
		395	case GL_UNSIGNED_INT_8_8_8_8:
		396	case GL_UNSIGNED_INT_8_8_8_8_REV:
		397	case GL_UNSIGNED_INT_10_10_10_2:
		398	case GL_UNSIGNED_INT_2_10_10_10_REV:
		399	return GL_TRUE;
		400	default:
		401	return GL_FALSE;
		402	}
		403	case GL_YCBCR_MESA:
		404	if (type == GL_UNSIGNED_SHORT_8_8_MESA \|\|
		405	type == GL_UNSIGNED_SHORT_8_8_REV_MESA)
		406	return GL_TRUE;
		407	else
		408	return GL_FALSE;
		409	default:
		410	; /* fall-through */
		411	}
		412	return GL_FALSE;
		413	}
		414
		415
		416
		417	/*
		418	* Return the address of a pixel in an image (actually a volume).
		419	* Pixel unpacking/packing parameters are observed according to 'packing'.
		420	* Input: image - start of image data
		421	* width, height - size of image
		422	* format - image format
		423	* type - pixel component type
		424	* packing - the pixelstore attributes
		425	* img - which image in the volume (0 for 1D or 2D images)
		426	* row, column - location of pixel in the image
		427	* Return: address of pixel at (image,row,column) in image or NULL if error.
		428	*/
		429	GLvoid *
		430	_mesa_image_address( const struct gl_pixelstore_attrib *packing,
		431	const GLvoid *image, GLsizei width,
		432	GLsizei height, GLenum format, GLenum type,
		433	GLint img, GLint row, GLint column )
		434	{
		435	GLint alignment; /* 1, 2 or 4 */
		436	GLint pixels_per_row;
		437	GLint rows_per_image;
		438	GLint skiprows;
		439	GLint skippixels;
		440	GLint skipimages; /* for 3-D volume images */
		441	GLubyte *pixel_addr;
		442
		443	alignment = packing->Alignment;
		444	if (packing->RowLength > 0) {
		445	pixels_per_row = packing->RowLength;
		446	}
		447	else {
		448	pixels_per_row = width;
		449	}
		450	if (packing->ImageHeight > 0) {
		451	rows_per_image = packing->ImageHeight;
		452	}
		453	else {
		454	rows_per_image = height;
		455	}
		456	skiprows = packing->SkipRows;
		457	skippixels = packing->SkipPixels;
		458	skipimages = packing->SkipImages;
		459
		460	if (type==GL_BITMAP) {
		461	/* BITMAP data */
		462	GLint comp_per_pixel; /* components per pixel */
		463	GLint bytes_per_comp; /* bytes per component */
		464	GLint bytes_per_row;
		465	GLint bytes_per_image;
		466
		467	/* Compute bytes per component */
		468	bytes_per_comp = _mesa_sizeof_packed_type( type );
		469	if (bytes_per_comp<0) {
		470	return NULL;
		471	}
		472
		473	/* Compute number of components per pixel */
		474	comp_per_pixel = _mesa_components_in_format( format );
		475	if (comp_per_pixel<0 && type != GL_BITMAP) {
		476	return NULL;
		477	}
		478
		479	bytes_per_row = alignment
		480	* CEILING( comp_per_pixelpixels_per_row, 8alignment );
		481
		482	bytes_per_image = bytes_per_row * rows_per_image;
		483
		484	pixel_addr = (GLubyte *) image
		485	+ (skipimages + img) * bytes_per_image
		486	+ (skiprows + row) * bytes_per_row
		487	+ (skippixels + column) / 8;
		488	}
		489	else {
		490	/* Non-BITMAP data */
		491	GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
		492	GLint topOfImage;
		493
		494	bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
		495
		496	/* The pixel type and format should have been error checked earlier */
		497	assert(bytes_per_pixel > 0);
		498
		499	bytes_per_row = pixels_per_row * bytes_per_pixel;
		500	remainder = bytes_per_row % alignment;
		501	if (remainder > 0)
		502	bytes_per_row += (alignment - remainder);
		503
		504	ASSERT(bytes_per_row % alignment == 0);
		505
		506	bytes_per_image = bytes_per_row * rows_per_image;
		507
		508	if (packing->Invert) {
		509	/* set pixel_addr to the last row */
		510	topOfImage = bytes_per_row * (height - 1);
		511	bytes_per_row = -bytes_per_row;
		512	}
		513	else {
		514	topOfImage = 0;
		515	}
		516
		517	/* compute final pixel address */
		518	pixel_addr = (GLubyte *) image
		519	+ (skipimages + img) * bytes_per_image
		520	+ topOfImage
		521	+ (skiprows + row) * bytes_per_row
		522	+ (skippixels + column) * bytes_per_pixel;
		523	}
		524
		525	return (GLvoid *) pixel_addr;
		526	}
		527
		528
		529
		530	/*
		531	* Compute the stride between image rows (in bytes) for the given
		532	* pixel packing parameters and image width, format and type.
		533	*/
		534	GLint
		535	_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
		536	GLint width, GLenum format, GLenum type )
		537	{
		538	ASSERT(packing);
		539	if (type == GL_BITMAP) {
		540	/* BITMAP data */
		541	GLint bytes;
		542	if (packing->RowLength == 0) {
		543	bytes = (width + 7) / 8;
		544	}
		545	else {
		546	bytes = (packing->RowLength + 7) / 8;
		547	}
		548	if (packing->Invert) {
		549	/* negate the bytes per row (negative row stride) */
		550	bytes = -bytes;
		551	}
		552	return bytes;
		553	}
		554	else {
		555	/* Non-BITMAP data */
		556	const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
		557	GLint bytesPerRow, remainder;
		558	if (bytesPerPixel <= 0)
		559	return -1; /* error */
		560	if (packing->RowLength == 0) {
		561	bytesPerRow = bytesPerPixel * width;
		562	}
		563	else {
		564	bytesPerRow = bytesPerPixel * packing->RowLength;
		565	}
		566	remainder = bytesPerRow % packing->Alignment;
		567	if (remainder > 0)
		568	bytesPerRow += (packing->Alignment - remainder);
		569	if (packing->Invert)
		570	bytesPerRow = -bytesPerRow;
		571	return bytesPerRow;
		572	}
		573	}
		574
		575
		576
		577	/*
		578	* Compute the stride between images in a 3D texture (in bytes) for the given
		579	* pixel packing parameters and image width, format and type.
		580	*/
		581	GLint
		582	_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
		583	GLint width, GLint height,
		584	GLenum format, GLenum type )
		585	{
		586	ASSERT(packing);
		587	ASSERT(type != GL_BITMAP);
		588
		589	{
		590	const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
		591	GLint bytesPerRow, bytesPerImage, remainder;
		592
		593	if (bytesPerPixel <= 0)
		594	return -1; /* error */
		595	if (packing->RowLength == 0) {
		596	bytesPerRow = bytesPerPixel * width;
		597	}
		598	else {
		599	bytesPerRow = bytesPerPixel * packing->RowLength;
		600	}
		601	remainder = bytesPerRow % packing->Alignment;
		602	if (remainder > 0)
		603	bytesPerRow += (packing->Alignment - remainder);
		604
		605	if (packing->ImageHeight == 0)
		606	bytesPerImage = bytesPerRow * height;
		607	else
		608	bytesPerImage = bytesPerRow * packing->ImageHeight;
		609
		610	return bytesPerImage;
		611	}
		612	}
		613
		614
		615
		616
		617	/*
		618	* Unpack a 32x32 pixel polygon stipple from user memory using the
		619	* current pixel unpack settings.
		620	*/
		621	void
		622	_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
		623	const struct gl_pixelstore_attrib *unpacking )
		624	{
		625	GLubyte ptrn = (GLubyte ) _mesa_unpack_bitmap( 32, 32, pattern, unpacking );
		626	if (ptrn) {
		627	/* Convert pattern from GLubytes to GLuints and handle big/little
		628	* endian differences
		629	*/
		630	GLubyte *p = ptrn;
		631	GLint i;
		632	for (i = 0; i < 32; i++) {
		633	dest[i] = (p[0] << 24)
		634	\| (p[1] << 16)
		635	\| (p[2] << 8)
		636	\| (p[3] );
		637	p += 4;
		638	}
		639	FREE(ptrn);
		640	}
		641	}
		642
		643
		644
		645	/*
		646	* Pack polygon stipple into user memory given current pixel packing
		647	* settings.
		648	*/
		649	void
		650	_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest,
		651	const struct gl_pixelstore_attrib *packing )
		652	{
		653	/* Convert pattern from GLuints to GLubytes to handle big/little
		654	* endian differences.
		655	*/
		656	GLubyte ptrn[32*4];
		657	GLint i;
		658	for (i = 0; i < 32; i++) {
		659	ptrn[i * 4 + 0] = (GLubyte) ((pattern[i] >> 24) & 0xff);
		660	ptrn[i * 4 + 1] = (GLubyte) ((pattern[i] >> 16) & 0xff);
		661	ptrn[i * 4 + 2] = (GLubyte) ((pattern[i] >> 8 ) & 0xff);
		662	ptrn[i * 4 + 3] = (GLubyte) ((pattern[i] ) & 0xff);
		663	}
		664
		665	_mesa_pack_bitmap(32, 32, ptrn, dest, packing);
		666	}
		667
		668
		669	/*
		670	* Unpack bitmap data. Resulting data will be in most-significant-bit-first
		671	* order with row alignment = 1 byte.
		672	*/
		673	GLvoid *
		674	_mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
		675	const struct gl_pixelstore_attrib *packing )
		676	{
		677	GLint bytes, row, width_in_bytes;
		678	GLubyte buffer, dst;
		679
		680	if (!pixels)
		681	return NULL;
		682
		683	/* Alloc dest storage */
		684	bytes = ((width + 7) / 8 * height);
		685	buffer = (GLubyte *) MALLOC( bytes );
		686	if (!buffer)
		687	return NULL;
		688
		689
		690	width_in_bytes = CEILING( width, 8 );
		691	dst = buffer;
		692	for (row = 0; row < height; row++) {
		693	const GLubyte src = (const GLubyte )
		694	_mesa_image_address(packing, pixels, width, height,
		695	GL_COLOR_INDEX, GL_BITMAP, 0, row, 0);
		696	if (!src) {
		697	FREE(buffer);
		698	return NULL;
		699	}
		700
		701	if (packing->SkipPixels == 0) {
		702	MEMCPY( dst, src, width_in_bytes );
		703	if (packing->LsbFirst) {
		704	flip_bytes( dst, width_in_bytes );
		705	}
		706	}
		707	else {
		708	/* handling SkipPixels is a bit tricky (no pun intended!) */
		709	GLint i;
		710	if (packing->LsbFirst) {
		711	GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
		712	GLubyte dstMask = 128;
		713	const GLubyte *s = src;
		714	GLubyte *d = dst;
		715	*d = 0;
		716	for (i = 0; i < width; i++) {
		717	if (*s & srcMask) {
		718	*d \|= dstMask;
		719	}
		720	if (srcMask == 128) {
		721	srcMask = 1;
		722	s++;
		723	}
		724	else {
		725	srcMask = srcMask << 1;
		726	}
		727	if (dstMask == 1) {
		728	dstMask = 128;
		729	d++;
		730	*d = 0;
		731	}
		732	else {
		733	dstMask = dstMask >> 1;
		734	}
		735	}
		736	}
		737	else {
		738	GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
		739	GLubyte dstMask = 128;
		740	const GLubyte *s = src;
		741	GLubyte *d = dst;
		742	*d = 0;
		743	for (i = 0; i < width; i++) {
		744	if (*s & srcMask) {
		745	*d \|= dstMask;
		746	}
		747	if (srcMask == 1) {
		748	srcMask = 128;
		749	s++;
		750	}
		751	else {
		752	srcMask = srcMask >> 1;
		753	}
		754	if (dstMask == 1) {
		755	dstMask = 128;
		756	d++;
		757	*d = 0;
		758	}
		759	else {
		760	dstMask = dstMask >> 1;
		761	}
		762	}
		763	}
		764	}
		765	dst += width_in_bytes;
		766	}
		767
		768	return buffer;
		769	}
		770
		771
		772	/*
		773	* Pack bitmap data.
		774	*/
		775	void
		776	_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
		777	GLubyte dest, const struct gl_pixelstore_attrib packing )
		778	{
		779	GLint row, width_in_bytes;
		780	const GLubyte *src;
		781
		782	if (!source)
		783	return;
		784
		785	width_in_bytes = CEILING( width, 8 );
		786	src = source;
		787	for (row = 0; row < height; row++) {
		788	GLubyte dst = (GLubyte ) _mesa_image_address( packing, dest,
		789	width, height, GL_COLOR_INDEX, GL_BITMAP, 0, row, 0 );
		790	if (!dst)
		791	return;
		792
		793	if (packing->SkipPixels == 0) {
		794	MEMCPY( dst, src, width_in_bytes );
		795	if (packing->LsbFirst) {
		796	flip_bytes( dst, width_in_bytes );
		797	}
		798	}
		799	else {
		800	/* handling SkipPixels is a bit tricky (no pun intended!) */
		801	GLint i;
		802	if (packing->LsbFirst) {
		803	GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
		804	GLubyte dstMask = 128;
		805	const GLubyte *s = src;
		806	GLubyte *d = dst;
		807	*d = 0;
		808	for (i = 0; i < width; i++) {
		809	if (*s & srcMask) {
		810	*d \|= dstMask;
		811	}
		812	if (srcMask == 128) {
		813	srcMask = 1;
		814	s++;
		815	}
		816	else {
		817	srcMask = srcMask << 1;
		818	}
		819	if (dstMask == 1) {
		820	dstMask = 128;
		821	d++;
		822	*d = 0;
		823	}
		824	else {
		825	dstMask = dstMask >> 1;
		826	}
		827	}
		828	}
		829	else {
		830	GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
		831	GLubyte dstMask = 128;
		832	const GLubyte *s = src;
		833	GLubyte *d = dst;
		834	*d = 0;
		835	for (i = 0; i < width; i++) {
		836	if (*s & srcMask) {
		837	*d \|= dstMask;
		838	}
		839	if (srcMask == 1) {
		840	srcMask = 128;
		841	s++;
		842	}
		843	else {
		844	srcMask = srcMask >> 1;
		845	}
		846	if (dstMask == 1) {
		847	dstMask = 128;
		848	d++;
		849	*d = 0;
		850	}
		851	else {
		852	dstMask = dstMask >> 1;
		853	}
		854	}
		855	}
		856	}
		857	src += width_in_bytes;
		858	}
		859	}
		860
		861
		862
		863	/*
		864	* Used to pack an array [][4] of RGBA GLchan colors as specified
		865	* by the dstFormat, dstType and dstPacking. Used by glReadPixels,
		866	* glGetConvolutionFilter(), etc.
		867	*/
		868	void
		869	_mesa_pack_float_rgba_span( GLcontext *ctx,
		870	GLuint n, CONST GLfloat rgbaIn[][4],
		871	GLenum dstFormat, GLenum dstType,
		872	GLvoid *dstAddr,
		873	const struct gl_pixelstore_attrib *dstPacking,
		874	GLuint transferOps )
		875	{
		876	const GLint comps = _mesa_components_in_format(dstFormat);
		877	GLfloat luminance[MAX_WIDTH];
		878	GLfloat (*rgba)[4];
		879	GLuint i;
		880
		881	if (transferOps) {
		882	/* make copy of incoming data */
		883	DEFMARRAY(GLfloat, rgbaCopy, MAX_WIDTH, 4); /* mac 32k limitation */
		884	CHECKARRAY(rgbaCopy, return); /* mac 32k limitation */
		885
		886	for (i = 0; i < n; i++) {
		887	rgbaCopy[i][0] = rgbaIn[i][0];
		888	rgbaCopy[i][1] = rgbaIn[i][1];
		889	rgbaCopy[i][2] = rgbaIn[i][2];
		890	rgbaCopy[i][3] = rgbaIn[i][3];
		891	}
		892
		893	rgba = (GLfloat (*)[4]) rgbaCopy;
		894
		895	/* scale & bias */
		896	if (transferOps & IMAGE_SCALE_BIAS_BIT) {
		897	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		898	ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
		899	ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
		900	ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
		901	ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
		902	}
		903	/* color map lookup */
		904	if (transferOps & IMAGE_MAP_COLOR_BIT) {
		905	_mesa_map_rgba( ctx, n, rgba );
		906	}
		907	/* GL_COLOR_TABLE lookup */
		908	if (transferOps & IMAGE_COLOR_TABLE_BIT) {
		909	_mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
		910	}
		911	/* convolution */
		912	if (transferOps & IMAGE_CONVOLUTION_BIT) {
		913	/* this has to be done in the calling code */
		914	}
		915	/* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
		916	if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
		917	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		918	ctx->Pixel.PostConvolutionScale[RCOMP],
		919	ctx->Pixel.PostConvolutionScale[GCOMP],
		920	ctx->Pixel.PostConvolutionScale[BCOMP],
		921	ctx->Pixel.PostConvolutionScale[ACOMP],
		922	ctx->Pixel.PostConvolutionBias[RCOMP],
		923	ctx->Pixel.PostConvolutionBias[GCOMP],
		924	ctx->Pixel.PostConvolutionBias[BCOMP],
		925	ctx->Pixel.PostConvolutionBias[ACOMP]);
		926	}
		927	/* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
		928	if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
		929	_mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
		930	}
		931	/* color matrix transform */
		932	if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
		933	_mesa_transform_rgba(ctx, n, rgba);
		934	}
		935	/* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
		936	if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
		937	_mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
		938	}
		939	/* update histogram count */
		940	if (transferOps & IMAGE_HISTOGRAM_BIT) {
		941	_mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
		942	}
		943	/* min/max here */
		944	if (transferOps & IMAGE_MIN_MAX_BIT) {
		945	_mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
		946	if (ctx->MinMax.Sink) {
		947	UNDEFARRAY(rgbaCopy); /* mac 32k limitation */
		948	return;
		949	}
		950	}
		951	UNDEFARRAY(rgbaCopy); /* mac 32k limitation */
		952	}
		953	else {
		954	/* use incoming data, not a copy */
		955	rgba = (GLfloat (*)[4]) rgbaIn;
		956	}
		957
		958	/* XXX clamp rgba to [0,1]? */
		959
		960
		961	if (dstFormat == GL_LUMINANCE \|\| dstFormat == GL_LUMINANCE_ALPHA) {
		962	for (i = 0; i < n; i++) {
		963	GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
		964	#if CHAN_TYPE == GL_FLOAT
		965	luminance[i] = sum;
		966	#else
		967	luminance[i] = CLAMP(sum, 0.0F, 1.0F);
		968	#endif
		969	}
		970	}
		971
		972	/*
		973	* Pack/store the pixels. Ugh! Lots of cases!!!
		974	*/
		975	switch (dstType) {
		976	case GL_UNSIGNED_BYTE:
		977	{
		978	GLubyte dst = (GLubyte ) dstAddr;
		979	switch (dstFormat) {
		980	case GL_RED:
		981	for (i=0;i<n;i++)
		982	dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		983	break;
		984	case GL_GREEN:
		985	for (i=0;i<n;i++)
		986	dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		987	break;
		988	case GL_BLUE:
		989	for (i=0;i<n;i++)
		990	dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		991	break;
		992	case GL_ALPHA:
		993	for (i=0;i<n;i++)
		994	dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
		995	break;
		996	case GL_LUMINANCE:
		997	for (i=0;i<n;i++)
		998	dst[i] = FLOAT_TO_UBYTE(luminance[i]);
		999	break;
		1000	case GL_LUMINANCE_ALPHA:
		1001	for (i=0;i<n;i++) {
		1002	dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
		1003	dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
		1004	}
		1005	break;
		1006	case GL_RGB:
		1007	for (i=0;i<n;i++) {
		1008	dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		1009	dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		1010	dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		1011	}
		1012	break;
		1013	case GL_RGBA:
		1014	for (i=0;i<n;i++) {
		1015	dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		1016	dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		1017	dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		1018	dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
		1019	}
		1020	break;
		1021	case GL_BGR:
		1022	for (i=0;i<n;i++) {
		1023	dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		1024	dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		1025	dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		1026	}
		1027	break;
		1028	case GL_BGRA:
		1029	for (i=0;i<n;i++) {
		1030	dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		1031	dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		1032	dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		1033	dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
		1034	}
		1035	break;
		1036	case GL_ABGR_EXT:
		1037	for (i=0;i<n;i++) {
		1038	dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
		1039	dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
		1040	dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
		1041	dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
		1042	}
		1043	break;
		1044	default:
		1045	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1046	}
		1047	}
		1048	break;
		1049	case GL_BYTE:
		1050	{
		1051	GLbyte dst = (GLbyte ) dstAddr;
		1052	switch (dstFormat) {
		1053	case GL_RED:
		1054	for (i=0;i<n;i++)
		1055	dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1056	break;
		1057	case GL_GREEN:
		1058	for (i=0;i<n;i++)
		1059	dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1060	break;
		1061	case GL_BLUE:
		1062	for (i=0;i<n;i++)
		1063	dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1064	break;
		1065	case GL_ALPHA:
		1066	for (i=0;i<n;i++)
		1067	dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
		1068	break;
		1069	case GL_LUMINANCE:
		1070	for (i=0;i<n;i++)
		1071	dst[i] = FLOAT_TO_BYTE(luminance[i]);
		1072	break;
		1073	case GL_LUMINANCE_ALPHA:
		1074	for (i=0;i<n;i++) {
		1075	dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
		1076	dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
		1077	}
		1078	break;
		1079	case GL_RGB:
		1080	for (i=0;i<n;i++) {
		1081	dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1082	dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1083	dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1084	}
		1085	break;
		1086	case GL_RGBA:
		1087	for (i=0;i<n;i++) {
		1088	dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1089	dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1090	dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1091	dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
		1092	}
		1093	break;
		1094	case GL_BGR:
		1095	for (i=0;i<n;i++) {
		1096	dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1097	dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1098	dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1099	}
		1100	break;
		1101	case GL_BGRA:
		1102	for (i=0;i<n;i++) {
		1103	dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1104	dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1105	dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1106	dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
		1107	}
		1108	case GL_ABGR_EXT:
		1109	for (i=0;i<n;i++) {
		1110	dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
		1111	dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
		1112	dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
		1113	dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
		1114	}
		1115	break;
		1116	default:
		1117	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1118	}
		1119	}
		1120	break;
		1121	case GL_UNSIGNED_SHORT:
		1122	{
		1123	GLushort dst = (GLushort ) dstAddr;
		1124	switch (dstFormat) {
		1125	case GL_RED:
		1126	for (i=0;i<n;i++)
		1127	dst[i] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1128	break;
		1129	case GL_GREEN:
		1130	for (i=0;i<n;i++)
		1131	dst[i] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1132	break;
		1133	case GL_BLUE:
		1134	for (i=0;i<n;i++)
		1135	dst[i] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1136	break;
		1137	case GL_ALPHA:
		1138	for (i=0;i<n;i++)
		1139	dst[i] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
		1140	break;
		1141	case GL_LUMINANCE:
		1142	for (i=0;i<n;i++)
		1143	dst[i] = FLOAT_TO_USHORT(luminance[i]);
		1144	break;
		1145	case GL_LUMINANCE_ALPHA:
		1146	for (i=0;i<n;i++) {
		1147	dst[i*2+0] = FLOAT_TO_USHORT(luminance[i]);
		1148	dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
		1149	}
		1150	break;
		1151	case GL_RGB:
		1152	for (i=0;i<n;i++) {
		1153	dst[i*3+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1154	dst[i*3+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1155	dst[i*3+2] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1156	}
		1157	break;
		1158	case GL_RGBA:
		1159	for (i=0;i<n;i++) {
		1160	dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1161	dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1162	dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1163	dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
		1164	}
		1165	break;
		1166	case GL_BGR:
		1167	for (i=0;i<n;i++) {
		1168	dst[i*3+0] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1169	dst[i*3+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1170	dst[i*3+2] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1171	}
		1172	break;
		1173	case GL_BGRA:
		1174	for (i=0;i<n;i++) {
		1175	dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1176	dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1177	dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1178	dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
		1179	}
		1180	break;
		1181	case GL_ABGR_EXT:
		1182	for (i=0;i<n;i++) {
		1183	dst[i*4+0] = FLOAT_TO_USHORT(rgba[i][ACOMP]);
		1184	dst[i*4+1] = FLOAT_TO_USHORT(rgba[i][BCOMP]);
		1185	dst[i*4+2] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
		1186	dst[i*4+3] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
		1187	}
		1188	break;
		1189	default:
		1190	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1191	}
		1192	if (dstPacking->SwapBytes) {
		1193	_mesa_swap2( (GLushort ) dst, n comps);
		1194	}
		1195	}
		1196	break;
		1197	case GL_SHORT:
		1198	{
		1199	GLshort dst = (GLshort ) dstAddr;
		1200	switch (dstFormat) {
		1201	case GL_RED:
		1202	for (i=0;i<n;i++)
		1203	dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1204	break;
		1205	case GL_GREEN:
		1206	for (i=0;i<n;i++)
		1207	dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1208	break;
		1209	case GL_BLUE:
		1210	for (i=0;i<n;i++)
		1211	dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1212	break;
		1213	case GL_ALPHA:
		1214	for (i=0;i<n;i++)
		1215	dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
		1216	break;
		1217	case GL_LUMINANCE:
		1218	for (i=0;i<n;i++)
		1219	dst[i] = FLOAT_TO_SHORT(luminance[i]);
		1220	break;
		1221	case GL_LUMINANCE_ALPHA:
		1222	for (i=0;i<n;i++) {
		1223	dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
		1224	dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
		1225	}
		1226	break;
		1227	case GL_RGB:
		1228	for (i=0;i<n;i++) {
		1229	dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1230	dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1231	dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1232	}
		1233	break;
		1234	case GL_RGBA:
		1235	for (i=0;i<n;i++) {
		1236	dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1237	dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1238	dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1239	dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
		1240	}
		1241	break;
		1242	case GL_BGR:
		1243	for (i=0;i<n;i++) {
		1244	dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1245	dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1246	dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1247	}
		1248	break;
		1249	case GL_BGRA:
		1250	for (i=0;i<n;i++) {
		1251	dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1252	dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1253	dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1254	dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
		1255	}
		1256	case GL_ABGR_EXT:
		1257	for (i=0;i<n;i++) {
		1258	dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
		1259	dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
		1260	dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
		1261	dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
		1262	}
		1263	break;
		1264	default:
		1265	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1266	}
		1267	if (dstPacking->SwapBytes) {
		1268	_mesa_swap2( (GLushort ) dst, n comps );
		1269	}
		1270	}
		1271	break;
		1272	case GL_UNSIGNED_INT:
		1273	{
		1274	GLuint dst = (GLuint ) dstAddr;
		1275	switch (dstFormat) {
		1276	case GL_RED:
		1277	for (i=0;i<n;i++)
		1278	dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1279	break;
		1280	case GL_GREEN:
		1281	for (i=0;i<n;i++)
		1282	dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1283	break;
		1284	case GL_BLUE:
		1285	for (i=0;i<n;i++)
		1286	dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1287	break;
		1288	case GL_ALPHA:
		1289	for (i=0;i<n;i++)
		1290	dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
		1291	break;
		1292	case GL_LUMINANCE:
		1293	for (i=0;i<n;i++)
		1294	dst[i] = FLOAT_TO_UINT(luminance[i]);
		1295	break;
		1296	case GL_LUMINANCE_ALPHA:
		1297	for (i=0;i<n;i++) {
		1298	dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
		1299	dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
		1300	}
		1301	break;
		1302	case GL_RGB:
		1303	for (i=0;i<n;i++) {
		1304	dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1305	dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1306	dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1307	}
		1308	break;
		1309	case GL_RGBA:
		1310	for (i=0;i<n;i++) {
		1311	dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1312	dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1313	dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1314	dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
		1315	}
		1316	break;
		1317	case GL_BGR:
		1318	for (i=0;i<n;i++) {
		1319	dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1320	dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1321	dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1322	}
		1323	break;
		1324	case GL_BGRA:
		1325	for (i=0;i<n;i++) {
		1326	dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1327	dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1328	dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1329	dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
		1330	}
		1331	break;
		1332	case GL_ABGR_EXT:
		1333	for (i=0;i<n;i++) {
		1334	dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
		1335	dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
		1336	dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
		1337	dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
		1338	}
		1339	break;
		1340	default:
		1341	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1342	}
		1343	if (dstPacking->SwapBytes) {
		1344	_mesa_swap4( (GLuint ) dst, n comps );
		1345	}
		1346	}
		1347	break;
		1348	case GL_INT:
		1349	{
		1350	GLint dst = (GLint ) dstAddr;
		1351	switch (dstFormat) {
		1352	case GL_RED:
		1353	for (i=0;i<n;i++)
		1354	dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1355	break;
		1356	case GL_GREEN:
		1357	for (i=0;i<n;i++)
		1358	dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1359	break;
		1360	case GL_BLUE:
		1361	for (i=0;i<n;i++)
		1362	dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1363	break;
		1364	case GL_ALPHA:
		1365	for (i=0;i<n;i++)
		1366	dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
		1367	break;
		1368	case GL_LUMINANCE:
		1369	for (i=0;i<n;i++)
		1370	dst[i] = FLOAT_TO_INT(luminance[i]);
		1371	break;
		1372	case GL_LUMINANCE_ALPHA:
		1373	for (i=0;i<n;i++) {
		1374	dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
		1375	dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
		1376	}
		1377	break;
		1378	case GL_RGB:
		1379	for (i=0;i<n;i++) {
		1380	dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1381	dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1382	dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1383	}
		1384	break;
		1385	case GL_RGBA:
		1386	for (i=0;i<n;i++) {
		1387	dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1388	dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1389	dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1390	dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
		1391	}
		1392	break;
		1393	case GL_BGR:
		1394	for (i=0;i<n;i++) {
		1395	dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1396	dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1397	dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1398	}
		1399	break;
		1400	case GL_BGRA:
		1401	for (i=0;i<n;i++) {
		1402	dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1403	dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1404	dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1405	dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
		1406	}
		1407	break;
		1408	case GL_ABGR_EXT:
		1409	for (i=0;i<n;i++) {
		1410	dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
		1411	dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
		1412	dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
		1413	dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
		1414	}
		1415	break;
		1416	default:
		1417	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1418	}
		1419	if (dstPacking->SwapBytes) {
		1420	_mesa_swap4( (GLuint ) dst, n comps );
		1421	}
		1422	}
		1423	break;
		1424	case GL_FLOAT:
		1425	{
		1426	GLfloat dst = (GLfloat ) dstAddr;
		1427	switch (dstFormat) {
		1428	case GL_RED:
		1429	for (i=0;i<n;i++)
		1430	dst[i] = rgba[i][RCOMP];
		1431	break;
		1432	case GL_GREEN:
		1433	for (i=0;i<n;i++)
		1434	dst[i] = rgba[i][GCOMP];
		1435	break;
		1436	case GL_BLUE:
		1437	for (i=0;i<n;i++)
		1438	dst[i] = rgba[i][BCOMP];
		1439	break;
		1440	case GL_ALPHA:
		1441	for (i=0;i<n;i++)
		1442	dst[i] = rgba[i][ACOMP];
		1443	break;
		1444	case GL_LUMINANCE:
		1445	for (i=0;i<n;i++)
		1446	dst[i] = luminance[i];
		1447	break;
		1448	case GL_LUMINANCE_ALPHA:
		1449	for (i=0;i<n;i++) {
		1450	dst[i*2+0] = luminance[i];
		1451	dst[i*2+1] = rgba[i][ACOMP];
		1452	}
		1453	break;
		1454	case GL_RGB:
		1455	for (i=0;i<n;i++) {
		1456	dst[i*3+0] = rgba[i][RCOMP];
		1457	dst[i*3+1] = rgba[i][GCOMP];
		1458	dst[i*3+2] = rgba[i][BCOMP];
		1459	}
		1460	break;
		1461	case GL_RGBA:
		1462	for (i=0;i<n;i++) {
		1463	dst[i*4+0] = rgba[i][RCOMP];
		1464	dst[i*4+1] = rgba[i][GCOMP];
		1465	dst[i*4+2] = rgba[i][BCOMP];
		1466	dst[i*4+3] = rgba[i][ACOMP];
		1467	}
		1468	break;
		1469	case GL_BGR:
		1470	for (i=0;i<n;i++) {
		1471	dst[i*3+0] = rgba[i][BCOMP];
		1472	dst[i*3+1] = rgba[i][GCOMP];
		1473	dst[i*3+2] = rgba[i][RCOMP];
		1474	}
		1475	break;
		1476	case GL_BGRA:
		1477	for (i=0;i<n;i++) {
		1478	dst[i*4+0] = rgba[i][BCOMP];
		1479	dst[i*4+1] = rgba[i][GCOMP];
		1480	dst[i*4+2] = rgba[i][RCOMP];
		1481	dst[i*4+3] = rgba[i][ACOMP];
		1482	}
		1483	break;
		1484	case GL_ABGR_EXT:
		1485	for (i=0;i<n;i++) {
		1486	dst[i*4+0] = rgba[i][ACOMP];
		1487	dst[i*4+1] = rgba[i][BCOMP];
		1488	dst[i*4+2] = rgba[i][GCOMP];
		1489	dst[i*4+3] = rgba[i][RCOMP];
		1490	}
		1491	break;
		1492	default:
		1493	_mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
		1494	}
		1495	if (dstPacking->SwapBytes) {
		1496	_mesa_swap4( (GLuint ) dst, n comps );
		1497	}
		1498	}
		1499	break;
		1500	case GL_UNSIGNED_BYTE_3_3_2:
		1501	if (dstFormat == GL_RGB) {
		1502	GLubyte dst = (GLubyte ) dstAddr;
		1503	for (i=0;i<n;i++) {
		1504	dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) << 5)
		1505	\| (((GLint) (rgba[i][GCOMP] * 7.0F)) << 2)
		1506	\| (((GLint) (rgba[i][BCOMP] * 3.0F)) );
		1507	}
		1508	}
		1509	break;
		1510	case GL_UNSIGNED_BYTE_2_3_3_REV:
		1511	if (dstFormat == GL_RGB) {
		1512	GLubyte dst = (GLubyte ) dstAddr;
		1513	for (i=0;i<n;i++) {
		1514	dst[i] = (((GLint) (rgba[i][RCOMP] * 7.0F)) )
		1515	\| (((GLint) (rgba[i][GCOMP] * 7.0F)) << 3)
		1516	\| (((GLint) (rgba[i][BCOMP] * 3.0F)) << 5);
		1517	}
		1518	}
		1519	break;
		1520	case GL_UNSIGNED_SHORT_5_6_5:
		1521	if (dstFormat == GL_RGB) {
		1522	GLushort dst = (GLushort ) dstAddr;
		1523	for (i=0;i<n;i++) {
		1524	dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
		1525	\| (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
		1526	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) );
		1527	}
		1528	}
		1529	break;
		1530	case GL_UNSIGNED_SHORT_5_6_5_REV:
		1531	if (dstFormat == GL_RGB) {
		1532	GLushort dst = (GLushort ) dstAddr;
		1533	for (i=0;i<n;i++) {
		1534	dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
		1535	\| (((GLint) (rgba[i][GCOMP] * 63.0F)) << 5)
		1536	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11);
		1537	}
		1538	}
		1539	break;
		1540	case GL_UNSIGNED_SHORT_4_4_4_4:
		1541	if (dstFormat == GL_RGBA) {
		1542	GLushort dst = (GLushort ) dstAddr;
		1543	for (i=0;i<n;i++) {
		1544	dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12)
		1545	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
		1546	\| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
		1547	\| (((GLint) (rgba[i][ACOMP] * 15.0F)) );
		1548	}
		1549	}
		1550	else if (dstFormat == GL_BGRA) {
		1551	GLushort dst = (GLushort ) dstAddr;
		1552	for (i=0;i<n;i++) {
		1553	dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) << 12)
		1554	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
		1555	\| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 4)
		1556	\| (((GLint) (rgba[i][ACOMP] * 15.0F)) );
		1557	}
		1558	}
		1559	else if (dstFormat == GL_ABGR_EXT) {
		1560	GLushort dst = (GLushort ) dstAddr;
		1561	for (i=0;i<n;i++) {
		1562	dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) << 4)
		1563	\| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
		1564	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 12)
		1565	\| (((GLint) (rgba[i][RCOMP] * 15.0F)) );
		1566	}
		1567	}
		1568	break;
		1569	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
		1570	if (dstFormat == GL_RGBA) {
		1571	GLushort dst = (GLushort ) dstAddr;
		1572	for (i=0;i<n;i++) {
		1573	dst[i] = (((GLint) (rgba[i][RCOMP] * 15.0F)) )
		1574	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
		1575	\| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 8)
		1576	\| (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
		1577	}
		1578	}
		1579	else if (dstFormat == GL_BGRA) {
		1580	GLushort dst = (GLushort ) dstAddr;
		1581	for (i=0;i<n;i++) {
		1582	dst[i] = (((GLint) (rgba[i][BCOMP] * 15.0F)) )
		1583	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 4)
		1584	\| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 8)
		1585	\| (((GLint) (rgba[i][ACOMP] * 15.0F)) << 12);
		1586	}
		1587	}
		1588	else if (dstFormat == GL_ABGR_EXT) {
		1589	GLushort dst = (GLushort ) dstAddr;
		1590	for (i=0;i<n;i++) {
		1591	dst[i] = (((GLint) (rgba[i][ACOMP] * 15.0F)) )
		1592	\| (((GLint) (rgba[i][BCOMP] * 15.0F)) << 4)
		1593	\| (((GLint) (rgba[i][GCOMP] * 15.0F)) << 8)
		1594	\| (((GLint) (rgba[i][RCOMP] * 15.0F)) << 12);
		1595	}
		1596	}
		1597	break;
		1598	case GL_UNSIGNED_SHORT_5_5_5_1:
		1599	if (dstFormat == GL_RGBA) {
		1600	GLushort dst = (GLushort ) dstAddr;
		1601	for (i=0;i<n;i++) {
		1602	dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) << 11)
		1603	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
		1604	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 1)
		1605	\| (((GLint) (rgba[i][ACOMP] * 1.0F)) );
		1606	}
		1607	}
		1608	else if (dstFormat == GL_BGRA) {
		1609	GLushort dst = (GLushort ) dstAddr;
		1610	for (i=0;i<n;i++) {
		1611	dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) << 11)
		1612	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 6)
		1613	\| (((GLint) (rgba[i][RCOMP] * 31.0F)) << 1)
		1614	\| (((GLint) (rgba[i][ACOMP] * 1.0F)) );
		1615	}
		1616	}
		1617	else if (dstFormat == GL_ABGR_EXT) {
		1618	GLushort dst = (GLushort ) dstAddr;
		1619	for (i=0;i<n;i++) {
		1620	dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) << 11)
		1621	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 6)
		1622	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 1)
		1623	\| (((GLint) (rgba[i][RCOMP] * 1.0F)) );
		1624	}
		1625	}
		1626	break;
		1627	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
		1628	if (dstFormat == GL_RGBA) {
		1629	GLushort dst = (GLushort ) dstAddr;
		1630	for (i=0;i<n;i++) {
		1631	dst[i] = (((GLint) (rgba[i][RCOMP] * 31.0F)) )
		1632	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
		1633	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 10)
		1634	\| (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
		1635	}
		1636	}
		1637	else if (dstFormat == GL_BGRA) {
		1638	GLushort dst = (GLushort ) dstAddr;
		1639	for (i=0;i<n;i++) {
		1640	dst[i] = (((GLint) (rgba[i][BCOMP] * 31.0F)) )
		1641	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 5)
		1642	\| (((GLint) (rgba[i][RCOMP] * 31.0F)) << 10)
		1643	\| (((GLint) (rgba[i][ACOMP] * 1.0F)) << 15);
		1644	}
		1645	}
		1646	else if (dstFormat == GL_ABGR_EXT) {
		1647	GLushort dst = (GLushort ) dstAddr;
		1648	for (i=0;i<n;i++) {
		1649	dst[i] = (((GLint) (rgba[i][ACOMP] * 31.0F)) )
		1650	\| (((GLint) (rgba[i][BCOMP] * 31.0F)) << 5)
		1651	\| (((GLint) (rgba[i][GCOMP] * 31.0F)) << 10)
		1652	\| (((GLint) (rgba[i][RCOMP] * 1.0F)) << 15);
		1653	}
		1654	}
		1655	break;
		1656	case GL_UNSIGNED_INT_8_8_8_8:
		1657	if (dstFormat == GL_RGBA) {
		1658	GLuint dst = (GLuint ) dstAddr;
		1659	for (i=0;i<n;i++) {
		1660	dst[i] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24)
		1661	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
		1662	\| (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8)
		1663	\| (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
		1664	}
		1665	}
		1666	else if (dstFormat == GL_BGRA) {
		1667	GLuint dst = (GLuint ) dstAddr;
		1668	for (i=0;i<n;i++) {
		1669	dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 24)
		1670	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
		1671	\| (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 8)
		1672	\| (((GLuint) (rgba[i][ACOMP] * 255.0F)) );
		1673	}
		1674	}
		1675	else if (dstFormat == GL_ABGR_EXT) {
		1676	GLuint dst = (GLuint ) dstAddr;
		1677	for (i=0;i<n;i++) {
		1678	dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24)
		1679	\| (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16)
		1680	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
		1681	\| (((GLuint) (rgba[i][RCOMP] * 255.0F)) );
		1682	}
		1683	}
		1684	break;
		1685	case GL_UNSIGNED_INT_8_8_8_8_REV:
		1686	if (dstFormat == GL_RGBA) {
		1687	GLuint dst = (GLuint ) dstAddr;
		1688	for (i=0;i<n;i++) {
		1689	dst[i] = (((GLuint) (rgba[i][RCOMP] * 255.0F)) )
		1690	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
		1691	\| (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 16)
		1692	\| (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24);
		1693	}
		1694	}
		1695	else if (dstFormat == GL_BGRA) {
		1696	GLuint dst = (GLuint ) dstAddr;
		1697	for (i=0;i<n;i++) {
		1698	dst[i] = (((GLuint) (rgba[i][BCOMP] * 255.0F)) )
		1699	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 8)
		1700	\| (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 16)
		1701	\| (((GLuint) (rgba[i][ACOMP] * 255.0F)) << 24);
		1702	}
		1703	}
		1704	else if (dstFormat == GL_ABGR_EXT) {
		1705	GLuint dst = (GLuint ) dstAddr;
		1706	for (i=0;i<n;i++) {
		1707	dst[i] = (((GLuint) (rgba[i][ACOMP] * 255.0F)) )
		1708	\| (((GLuint) (rgba[i][BCOMP] * 255.0F)) << 8)
		1709	\| (((GLuint) (rgba[i][GCOMP] * 255.0F)) << 16)
		1710	\| (((GLuint) (rgba[i][RCOMP] * 255.0F)) << 24);
		1711	}
		1712	}
		1713	break;
		1714	case GL_UNSIGNED_INT_10_10_10_2:
		1715	if (dstFormat == GL_RGBA) {
		1716	GLuint dst = (GLuint ) dstAddr;
		1717	for (i=0;i<n;i++) {
		1718	dst[i] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 22)
		1719	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12)
		1720	\| (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 2)
		1721	\| (((GLuint) (rgba[i][ACOMP] * 3.0F)) );
		1722	}
		1723	}
		1724	else if (dstFormat == GL_BGRA) {
		1725	GLuint dst = (GLuint ) dstAddr;
		1726	for (i=0;i<n;i++) {
		1727	dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 22)
		1728	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 12)
		1729	\| (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 2)
		1730	\| (((GLuint) (rgba[i][ACOMP] * 3.0F)) );
		1731	}
		1732	}
		1733	else if (dstFormat == GL_ABGR_EXT) {
		1734	GLuint dst = (GLuint ) dstAddr;
		1735	for (i=0;i<n;i++) {
		1736	dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) << 22)
		1737	\| (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 12)
		1738	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 2)
		1739	\| (((GLuint) (rgba[i][RCOMP] * 3.0F)) );
		1740	}
		1741	}
		1742	break;
		1743	case GL_UNSIGNED_INT_2_10_10_10_REV:
		1744	if (dstFormat == GL_RGBA) {
		1745	GLuint dst = (GLuint ) dstAddr;
		1746	for (i=0;i<n;i++) {
		1747	dst[i] = (((GLuint) (rgba[i][RCOMP] * 1023.0F)) )
		1748	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10)
		1749	\| (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 20)
		1750	\| (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30);
		1751	}
		1752	}
		1753	else if (dstFormat == GL_BGRA) {
		1754	GLuint dst = (GLuint ) dstAddr;
		1755	for (i=0;i<n;i++) {
		1756	dst[i] = (((GLuint) (rgba[i][BCOMP] * 1023.0F)) )
		1757	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 10)
		1758	\| (((GLuint) (rgba[i][RCOMP] * 1023.0F)) << 20)
		1759	\| (((GLuint) (rgba[i][ACOMP] * 3.0F)) << 30);
		1760	}
		1761	}
		1762	else if (dstFormat == GL_ABGR_EXT) {
		1763	GLuint dst = (GLuint ) dstAddr;
		1764	for (i=0;i<n;i++) {
		1765	dst[i] = (((GLuint) (rgba[i][ACOMP] * 1023.0F)) )
		1766	\| (((GLuint) (rgba[i][BCOMP] * 1023.0F)) << 10)
		1767	\| (((GLuint) (rgba[i][GCOMP] * 1023.0F)) << 20)
		1768	\| (((GLuint) (rgba[i][RCOMP] * 3.0F)) << 30);
		1769	}
		1770	}
		1771	break;
		1772	default:
		1773	_mesa_problem(ctx, "bad type in _mesa_pack_float_rgba_span");
		1774	}
		1775	}
		1776
		1777
		1778
		1779	/*
		1780	* Pack the given RGBA span into client memory at 'dest' address
		1781	* in the given pixel format and type.
		1782	* Optionally apply the enabled pixel transfer ops.
		1783	* Pack into memory using the given packing params struct.
		1784	* This is used by glReadPixels and glGetTexImage?D()
		1785	* Input: ctx - the context
		1786	* n - number of pixels in the span
		1787	* rgba - the pixels
		1788	* format - dest packing format
		1789	* type - dest packing datatype
		1790	* destination - destination packing address
		1791	* packing - pixel packing parameters
		1792	* transferOps - bitmask of IMAGE_*_BIT operations to apply
		1793	*/
		1794	void
		1795	_mesa_pack_rgba_span( GLcontext *ctx,
		1796	GLuint n, CONST GLchan srcRgba[][4],
		1797	GLenum dstFormat, GLenum dstType,
		1798	GLvoid *dstAddr,
		1799	const struct gl_pixelstore_attrib *dstPacking,
		1800	GLuint transferOps)
		1801	{
		1802	ASSERT((ctx->NewState & _NEW_PIXEL) == 0 \|\| transferOps == 0);
		1803
		1804	/* Test for optimized case first */
		1805	if (transferOps == 0 && dstFormat == GL_RGBA && dstType == CHAN_TYPE) {
		1806	/* common simple case */
		1807	MEMCPY(dstAddr, srcRgba, n * 4 * sizeof(GLchan));
		1808	}
		1809	else if (transferOps == 0 && dstFormat == GL_RGB && dstType == CHAN_TYPE) {
		1810	/* common simple case */
		1811	GLuint i;
		1812	GLchan dest = (GLchan ) dstAddr;
		1813	for (i = 0; i < n; i++) {
		1814	dest[0] = srcRgba[i][RCOMP];
		1815	dest[1] = srcRgba[i][GCOMP];
		1816	dest[2] = srcRgba[i][BCOMP];
		1817	dest += 3;
		1818	}
		1819	}
		1820	else if (transferOps == 0 && dstFormat == GL_RGBA && dstType == GL_UNSIGNED_BYTE) {
		1821	/* common simple case */
		1822	GLuint i;
		1823	GLubyte dest = (GLubyte ) dstAddr;
		1824	for (i = 0; i < n; i++) {
		1825	dest[0] = CHAN_TO_UBYTE(srcRgba[i][RCOMP]);
		1826	dest[1] = CHAN_TO_UBYTE(srcRgba[i][GCOMP]);
		1827	dest[2] = CHAN_TO_UBYTE(srcRgba[i][BCOMP]);
		1828	dest[3] = CHAN_TO_UBYTE(srcRgba[i][ACOMP]);
		1829	dest += 4;
		1830	}
		1831	}
		1832	else {
		1833	/* general solution */
		1834	GLuint i;
		1835	DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */
		1836	CHECKARRAY(rgba, return); /* mac 32k limitation */
		1837
		1838	assert(n <= MAX_WIDTH);
		1839	/* convert color components to floating point */
		1840	for (i=0;i<n;i++) {
		1841	rgba[i][RCOMP] = CHAN_TO_FLOAT(srcRgba[i][RCOMP]);
		1842	rgba[i][GCOMP] = CHAN_TO_FLOAT(srcRgba[i][GCOMP]);
		1843	rgba[i][BCOMP] = CHAN_TO_FLOAT(srcRgba[i][BCOMP]);
		1844	rgba[i][ACOMP] = CHAN_TO_FLOAT(srcRgba[i][ACOMP]);
		1845	}
		1846	_mesa_pack_float_rgba_span(ctx, n, (const GLfloat (*)[4]) rgba,
		1847	dstFormat, dstType, dstAddr,
		1848	dstPacking, transferOps);
		1849	UNDEFARRAY(rgba); /* mac 32k limitation */
		1850	}
		1851	}
		1852
		1853
		1854	#define SWAP2BYTE(VALUE) \
		1855	{ \
		1856	GLubyte bytes = (GLubyte ) &(VALUE); \
		1857	GLubyte tmp = bytes[0]; \
		1858	bytes[0] = bytes[1]; \
		1859	bytes[1] = tmp; \
		1860	}
		1861
		1862	#define SWAP4BYTE(VALUE) \
		1863	{ \
		1864	GLubyte bytes = (GLubyte ) &(VALUE); \
		1865	GLubyte tmp = bytes[0]; \
		1866	bytes[0] = bytes[3]; \
		1867	bytes[3] = tmp; \
		1868	tmp = bytes[1]; \
		1869	bytes[1] = bytes[2]; \
		1870	bytes[2] = tmp; \
		1871	}
		1872
		1873
		1874	static void
		1875	extract_uint_indexes(GLuint n, GLuint indexes[],
		1876	GLenum srcFormat, GLenum srcType, const GLvoid *src,
		1877	const struct gl_pixelstore_attrib *unpack )
		1878	{
		1879	assert(srcFormat == GL_COLOR_INDEX);
		1880
		1881	ASSERT(srcType == GL_BITMAP \|\|
		1882	srcType == GL_UNSIGNED_BYTE \|\|
		1883	srcType == GL_BYTE \|\|
		1884	srcType == GL_UNSIGNED_SHORT \|\|
		1885	srcType == GL_SHORT \|\|
		1886	srcType == GL_UNSIGNED_INT \|\|
		1887	srcType == GL_INT \|\|
		1888	srcType == GL_FLOAT);
		1889
		1890	switch (srcType) {
		1891	case GL_BITMAP:
		1892	{
		1893	GLubyte ubsrc = (GLubyte ) src;
		1894	if (unpack->LsbFirst) {
		1895	GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
		1896	GLuint i;
		1897	for (i = 0; i < n; i++) {
		1898	indexes[i] = (*ubsrc & mask) ? 1 : 0;
		1899	if (mask == 128) {
		1900	mask = 1;
		1901	ubsrc++;
		1902	}
		1903	else {
		1904	mask = mask << 1;
		1905	}
		1906	}
		1907	}
		1908	else {
		1909	GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
		1910	GLuint i;
		1911	for (i = 0; i < n; i++) {
		1912	indexes[i] = (*ubsrc & mask) ? 1 : 0;
		1913	if (mask == 1) {
		1914	mask = 128;
		1915	ubsrc++;
		1916	}
		1917	else {
		1918	mask = mask >> 1;
		1919	}
		1920	}
		1921	}
		1922	}
		1923	break;
		1924	case GL_UNSIGNED_BYTE:
		1925	{
		1926	GLuint i;
		1927	const GLubyte s = (const GLubyte ) src;
		1928	for (i = 0; i < n; i++)
		1929	indexes[i] = s[i];
		1930	}
		1931	break;
		1932	case GL_BYTE:
		1933	{
		1934	GLuint i;
		1935	const GLbyte s = (const GLbyte ) src;
		1936	for (i = 0; i < n; i++)
		1937	indexes[i] = s[i];
		1938	}
		1939	break;
		1940	case GL_UNSIGNED_SHORT:
		1941	{
		1942	GLuint i;
		1943	const GLushort s = (const GLushort ) src;
		1944	if (unpack->SwapBytes) {
		1945	for (i = 0; i < n; i++) {
		1946	GLushort value = s[i];
		1947	SWAP2BYTE(value);
		1948	indexes[i] = value;
		1949	}
		1950	}
		1951	else {
		1952	for (i = 0; i < n; i++)
		1953	indexes[i] = s[i];
		1954	}
		1955	}
		1956	break;
		1957	case GL_SHORT:
		1958	{
		1959	GLuint i;
		1960	const GLshort s = (const GLshort ) src;
		1961	if (unpack->SwapBytes) {
		1962	for (i = 0; i < n; i++) {
		1963	GLshort value = s[i];
		1964	SWAP2BYTE(value);
		1965	indexes[i] = value;
		1966	}
		1967	}
		1968	else {
		1969	for (i = 0; i < n; i++)
		1970	indexes[i] = s[i];
		1971	}
		1972	}
		1973	break;
		1974	case GL_UNSIGNED_INT:
		1975	{
		1976	GLuint i;
		1977	const GLuint s = (const GLuint ) src;
		1978	if (unpack->SwapBytes) {
		1979	for (i = 0; i < n; i++) {
		1980	GLuint value = s[i];
		1981	SWAP4BYTE(value);
		1982	indexes[i] = value;
		1983	}
		1984	}
		1985	else {
		1986	for (i = 0; i < n; i++)
		1987	indexes[i] = s[i];
		1988	}
		1989	}
		1990	break;
		1991	case GL_INT:
		1992	{
		1993	GLuint i;
		1994	const GLint s = (const GLint ) src;
		1995	if (unpack->SwapBytes) {
		1996	for (i = 0; i < n; i++) {
		1997	GLint value = s[i];
		1998	SWAP4BYTE(value);
		1999	indexes[i] = value;
		2000	}
		2001	}
		2002	else {
		2003	for (i = 0; i < n; i++)
		2004	indexes[i] = s[i];
		2005	}
		2006	}
		2007	break;
		2008	case GL_FLOAT:
		2009	{
		2010	GLuint i;
		2011	const GLfloat s = (const GLfloat ) src;
		2012	if (unpack->SwapBytes) {
		2013	for (i = 0; i < n; i++) {
		2014	GLfloat value = s[i];
		2015	SWAP4BYTE(value);
		2016	indexes[i] = (GLuint) value;
		2017	}
		2018	}
		2019	else {
		2020	for (i = 0; i < n; i++)
		2021	indexes[i] = (GLuint) s[i];
		2022	}
		2023	}
		2024	break;
		2025	default:
		2026	_mesa_problem(NULL, "bad srcType in extract_uint_indexes");
		2027	return;
		2028	}
		2029	}
		2030
		2031
		2032
		2033	/*
		2034	* This function extracts floating point RGBA values from arbitrary
		2035	* image data. srcFormat and srcType are the format and type parameters
		2036	* passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
		2037	*
		2038	* Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
		2039	* implements the "Conversion to floating point", "Conversion to RGB",
		2040	* and "Final Expansion to RGBA" operations.
		2041	*
		2042	* Args: n - number of pixels
		2043	* rgba - output colors
		2044	* srcFormat - format of incoming data
		2045	* srcType - datatype of incoming data
		2046	* src - source data pointer
		2047	* swapBytes - perform byteswapping of incoming data?
		2048	*/
		2049	static void
		2050	extract_float_rgba(GLuint n, GLfloat rgba[][4],
		2051	GLenum srcFormat, GLenum srcType, const GLvoid *src,
		2052	GLboolean swapBytes)
		2053	{
		2054	GLint redIndex, greenIndex, blueIndex, alphaIndex;
		2055	GLint stride;
		2056	GLint rComp, bComp, gComp, aComp;
		2057
		2058	ASSERT(srcFormat == GL_RED \|\|
		2059	srcFormat == GL_GREEN \|\|
		2060	srcFormat == GL_BLUE \|\|
		2061	srcFormat == GL_ALPHA \|\|
		2062	srcFormat == GL_LUMINANCE \|\|
		2063	srcFormat == GL_LUMINANCE_ALPHA \|\|
		2064	srcFormat == GL_INTENSITY \|\|
		2065	srcFormat == GL_RGB \|\|
		2066	srcFormat == GL_BGR \|\|
		2067	srcFormat == GL_RGBA \|\|
		2068	srcFormat == GL_BGRA \|\|
		2069	srcFormat == GL_ABGR_EXT);
		2070
		2071	ASSERT(srcType == GL_UNSIGNED_BYTE \|\|
		2072	srcType == GL_BYTE \|\|
		2073	srcType == GL_UNSIGNED_SHORT \|\|
		2074	srcType == GL_SHORT \|\|
		2075	srcType == GL_UNSIGNED_INT \|\|
		2076	srcType == GL_INT \|\|
		2077	srcType == GL_FLOAT \|\|
		2078	srcType == GL_UNSIGNED_BYTE_3_3_2 \|\|
		2079	srcType == GL_UNSIGNED_BYTE_2_3_3_REV \|\|
		2080	srcType == GL_UNSIGNED_SHORT_5_6_5 \|\|
		2081	srcType == GL_UNSIGNED_SHORT_5_6_5_REV \|\|
		2082	srcType == GL_UNSIGNED_SHORT_4_4_4_4 \|\|
		2083	srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV \|\|
		2084	srcType == GL_UNSIGNED_SHORT_5_5_5_1 \|\|
		2085	srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV \|\|
		2086	srcType == GL_UNSIGNED_INT_8_8_8_8 \|\|
		2087	srcType == GL_UNSIGNED_INT_8_8_8_8_REV \|\|
		2088	srcType == GL_UNSIGNED_INT_10_10_10_2 \|\|
		2089	srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
		2090
		2091	rComp = gComp = bComp = aComp = -1;
		2092
		2093	switch (srcFormat) {
		2094	case GL_RED:
		2095	redIndex = 0;
		2096	greenIndex = blueIndex = alphaIndex = -1;
		2097	stride = 1;
		2098	break;
		2099	case GL_GREEN:
		2100	greenIndex = 0;
		2101	redIndex = blueIndex = alphaIndex = -1;
		2102	stride = 1;
		2103	break;
		2104	case GL_BLUE:
		2105	blueIndex = 0;
		2106	redIndex = greenIndex = alphaIndex = -1;
		2107	stride = 1;
		2108	break;
		2109	case GL_ALPHA:
		2110	redIndex = greenIndex = blueIndex = -1;
		2111	alphaIndex = 0;
		2112	stride = 1;
		2113	break;
		2114	case GL_LUMINANCE:
		2115	redIndex = greenIndex = blueIndex = 0;
		2116	alphaIndex = -1;
		2117	stride = 1;
		2118	break;
		2119	case GL_LUMINANCE_ALPHA:
		2120	redIndex = greenIndex = blueIndex = 0;
		2121	alphaIndex = 1;
		2122	stride = 2;
		2123	break;
		2124	case GL_INTENSITY:
		2125	redIndex = greenIndex = blueIndex = alphaIndex = 0;
		2126	stride = 1;
		2127	break;
		2128	case GL_RGB:
		2129	redIndex = 0;
		2130	greenIndex = 1;
		2131	blueIndex = 2;
		2132	alphaIndex = -1;
		2133	stride = 3;
		2134	break;
		2135	case GL_BGR:
		2136	redIndex = 2;
		2137	greenIndex = 1;
		2138	blueIndex = 0;
		2139	alphaIndex = -1;
		2140	stride = 3;
		2141	break;
		2142	case GL_RGBA:
		2143	redIndex = 0;
		2144	greenIndex = 1;
		2145	blueIndex = 2;
		2146	alphaIndex = 3;
		2147	rComp = 0;
		2148	gComp = 1;
		2149	bComp = 2;
		2150	aComp = 3;
		2151	stride = 4;
		2152	break;
		2153	case GL_BGRA:
		2154	redIndex = 2;
		2155	greenIndex = 1;
		2156	blueIndex = 0;
		2157	alphaIndex = 3;
		2158	rComp = 2;
		2159	gComp = 1;
		2160	bComp = 0;
		2161	aComp = 3;
		2162	stride = 4;
		2163	break;
		2164	case GL_ABGR_EXT:
		2165	redIndex = 3;
		2166	greenIndex = 2;
		2167	blueIndex = 1;
		2168	alphaIndex = 0;
		2169	rComp = 3;
		2170	gComp = 2;
		2171	bComp = 1;
		2172	aComp = 0;
		2173	stride = 4;
		2174	break;
		2175	default:
		2176	_mesa_problem(NULL, "bad srcFormat in extract float data");
		2177	return;
		2178	}
		2179
		2180
		2181	#define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
		2182	if ((INDEX) < 0) { \
		2183	GLuint i; \
		2184	for (i = 0; i < n; i++) { \
		2185	rgba[i][CHANNEL] = DEFAULT; \
		2186	} \
		2187	} \
		2188	else if (swapBytes) { \
		2189	const TYPE s = (const TYPE ) src; \
		2190	GLuint i; \
		2191	for (i = 0; i < n; i++) { \
		2192	TYPE value = s[INDEX]; \
		2193	if (sizeof(TYPE) == 2) { \
		2194	SWAP2BYTE(value); \
		2195	} \
		2196	else if (sizeof(TYPE) == 4) { \
		2197	SWAP4BYTE(value); \
		2198	} \
		2199	rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
		2200	s += stride; \
		2201	} \
		2202	} \
		2203	else { \
		2204	const TYPE s = (const TYPE ) src; \
		2205	GLuint i; \
		2206	for (i = 0; i < n; i++) { \
		2207	rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
		2208	s += stride; \
		2209	} \
		2210	}
		2211
		2212	switch (srcType) {
		2213	case GL_UNSIGNED_BYTE:
		2214	PROCESS(redIndex, RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
		2215	PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
		2216	PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
		2217	PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
		2218	break;
		2219	case GL_BYTE:
		2220	PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
		2221	PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
		2222	PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
		2223	PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
		2224	break;
		2225	case GL_UNSIGNED_SHORT:
		2226	PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
		2227	PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
		2228	PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
		2229	PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
		2230	break;
		2231	case GL_SHORT:
		2232	PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
		2233	PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
		2234	PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
		2235	PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
		2236	break;
		2237	case GL_UNSIGNED_INT:
		2238	PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
		2239	PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
		2240	PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
		2241	PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
		2242	break;
		2243	case GL_INT:
		2244	PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT);
		2245	PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
		2246	PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT);
		2247	PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
		2248	break;
		2249	case GL_FLOAT:
		2250	PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat));
		2251	PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
		2252	PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
		2253	PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
		2254	break;
		2255	case GL_UNSIGNED_BYTE_3_3_2:
		2256	{
		2257	const GLubyte ubsrc = (const GLubyte ) src;
		2258	GLuint i;
		2259	for (i = 0; i < n; i ++) {
		2260	GLubyte p = ubsrc[i];
		2261	rgba[i][RCOMP] = ((p >> 5) ) * (1.0F / 7.0F);
		2262	rgba[i][GCOMP] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
		2263	rgba[i][BCOMP] = ((p ) & 0x3) * (1.0F / 3.0F);
		2264	rgba[i][ACOMP] = 1.0F;
		2265	}
		2266	}
		2267	break;
		2268	case GL_UNSIGNED_BYTE_2_3_3_REV:
		2269	{
		2270	const GLubyte ubsrc = (const GLubyte ) src;
		2271	GLuint i;
		2272	for (i = 0; i < n; i ++) {
		2273	GLubyte p = ubsrc[i];
		2274	rgba[i][RCOMP] = ((p ) & 0x7) * (1.0F / 7.0F);
		2275	rgba[i][GCOMP] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
		2276	rgba[i][BCOMP] = ((p >> 6) ) * (1.0F / 3.0F);
		2277	rgba[i][ACOMP] = 1.0F;
		2278	}
		2279	}
		2280	break;
		2281	case GL_UNSIGNED_SHORT_5_6_5:
		2282	if (swapBytes) {
		2283	const GLushort ussrc = (const GLushort ) src;
		2284	GLuint i;
		2285	for (i = 0; i < n; i ++) {
		2286	GLushort p = ussrc[i];
		2287	SWAP2BYTE(p);
		2288	rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
		2289	rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
		2290	rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2291	rgba[i][ACOMP] = 1.0F;
		2292	}
		2293	}
		2294	else {
		2295	const GLushort ussrc = (const GLushort ) src;
		2296	GLuint i;
		2297	for (i = 0; i < n; i ++) {
		2298	GLushort p = ussrc[i];
		2299	rgba[i][RCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
		2300	rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
		2301	rgba[i][BCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2302	rgba[i][ACOMP] = 1.0F;
		2303	}
		2304	}
		2305	break;
		2306	case GL_UNSIGNED_SHORT_5_6_5_REV:
		2307	if (swapBytes) {
		2308	const GLushort ussrc = (const GLushort ) src;
		2309	GLuint i;
		2310	for (i = 0; i < n; i ++) {
		2311	GLushort p = ussrc[i];
		2312	SWAP2BYTE(p);
		2313	rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2314	rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
		2315	rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
		2316	rgba[i][ACOMP] = 1.0F;
		2317	}
		2318	}
		2319	else {
		2320	const GLushort ussrc = (const GLushort ) src;
		2321	GLuint i;
		2322	for (i = 0; i < n; i ++) {
		2323	GLushort p = ussrc[i];
		2324	rgba[i][RCOMP] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2325	rgba[i][GCOMP] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
		2326	rgba[i][BCOMP] = ((p >> 11) ) * (1.0F / 31.0F);
		2327	rgba[i][ACOMP] = 1.0F;
		2328	}
		2329	}
		2330	break;
		2331	case GL_UNSIGNED_SHORT_4_4_4_4:
		2332	if (swapBytes) {
		2333	const GLushort ussrc = (const GLushort ) src;
		2334	GLuint i;
		2335	for (i = 0; i < n; i ++) {
		2336	GLushort p = ussrc[i];
		2337	SWAP2BYTE(p);
		2338	rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
		2339	rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
		2340	rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
		2341	rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
		2342	}
		2343	}
		2344	else {
		2345	const GLushort ussrc = (const GLushort ) src;
		2346	GLuint i;
		2347	for (i = 0; i < n; i ++) {
		2348	GLushort p = ussrc[i];
		2349	rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
		2350	rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
		2351	rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
		2352	rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
		2353	}
		2354	}
		2355	break;
		2356	case GL_UNSIGNED_SHORT_4_4_4_4_REV:
		2357	if (swapBytes) {
		2358	const GLushort ussrc = (const GLushort ) src;
		2359	GLuint i;
		2360	for (i = 0; i < n; i ++) {
		2361	GLushort p = ussrc[i];
		2362	SWAP2BYTE(p);
		2363	rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
		2364	rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
		2365	rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
		2366	rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
		2367	}
		2368	}
		2369	else {
		2370	const GLushort ussrc = (const GLushort ) src;
		2371	GLuint i;
		2372	for (i = 0; i < n; i ++) {
		2373	GLushort p = ussrc[i];
		2374	rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
		2375	rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
		2376	rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
		2377	rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
		2378	}
		2379	}
		2380	break;
		2381	case GL_UNSIGNED_SHORT_5_5_5_1:
		2382	if (swapBytes) {
		2383	const GLushort ussrc = (const GLushort ) src;
		2384	GLuint i;
		2385	for (i = 0; i < n; i ++) {
		2386	GLushort p = ussrc[i];
		2387	SWAP2BYTE(p);
		2388	rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
		2389	rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
		2390	rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
		2391	rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
		2392	}
		2393	}
		2394	else {
		2395	const GLushort ussrc = (const GLushort ) src;
		2396	GLuint i;
		2397	for (i = 0; i < n; i ++) {
		2398	GLushort p = ussrc[i];
		2399	rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
		2400	rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
		2401	rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
		2402	rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
		2403	}
		2404	}
		2405	break;
		2406	case GL_UNSIGNED_SHORT_1_5_5_5_REV:
		2407	if (swapBytes) {
		2408	const GLushort ussrc = (const GLushort ) src;
		2409	GLuint i;
		2410	for (i = 0; i < n; i ++) {
		2411	GLushort p = ussrc[i];
		2412	SWAP2BYTE(p);
		2413	rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2414	rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
		2415	rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
		2416	rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
		2417	}
		2418	}
		2419	else {
		2420	const GLushort ussrc = (const GLushort ) src;
		2421	GLuint i;
		2422	for (i = 0; i < n; i ++) {
		2423	GLushort p = ussrc[i];
		2424	rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
		2425	rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
		2426	rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
		2427	rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
		2428	}
		2429	}
		2430	break;
		2431	case GL_UNSIGNED_INT_8_8_8_8:
		2432	if (swapBytes) {
		2433	const GLuint uisrc = (const GLuint ) src;
		2434	GLuint i;
		2435	for (i = 0; i < n; i ++) {
		2436	GLuint p = uisrc[i];
		2437	rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
		2438	rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
		2439	rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
		2440	rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
		2441	}
		2442	}
		2443	else {
		2444	const GLuint uisrc = (const GLuint ) src;
		2445	GLuint i;
		2446	for (i = 0; i < n; i ++) {
		2447	GLuint p = uisrc[i];
		2448	rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
		2449	rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
		2450	rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
		2451	rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
		2452	}
		2453	}
		2454	break;
		2455	case GL_UNSIGNED_INT_8_8_8_8_REV:
		2456	if (swapBytes) {
		2457	const GLuint uisrc = (const GLuint ) src;
		2458	GLuint i;
		2459	for (i = 0; i < n; i ++) {
		2460	GLuint p = uisrc[i];
		2461	rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
		2462	rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
		2463	rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
		2464	rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
		2465	}
		2466	}
		2467	else {
		2468	const GLuint uisrc = (const GLuint ) src;
		2469	GLuint i;
		2470	for (i = 0; i < n; i ++) {
		2471	GLuint p = uisrc[i];
		2472	rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
		2473	rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
		2474	rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
		2475	rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
		2476	}
		2477	}
		2478	break;
		2479	case GL_UNSIGNED_INT_10_10_10_2:
		2480	if (swapBytes) {
		2481	const GLuint uisrc = (const GLuint ) src;
		2482	GLuint i;
		2483	for (i = 0; i < n; i ++) {
		2484	GLuint p = uisrc[i];
		2485	SWAP4BYTE(p);
		2486	rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
		2487	rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
		2488	rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
		2489	rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
		2490	}
		2491	}
		2492	else {
		2493	const GLuint uisrc = (const GLuint ) src;
		2494	GLuint i;
		2495	for (i = 0; i < n; i ++) {
		2496	GLuint p = uisrc[i];
		2497	rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
		2498	rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
		2499	rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
		2500	rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
		2501	}
		2502	}
		2503	break;
		2504	case GL_UNSIGNED_INT_2_10_10_10_REV:
		2505	if (swapBytes) {
		2506	const GLuint uisrc = (const GLuint ) src;
		2507	GLuint i;
		2508	for (i = 0; i < n; i ++) {
		2509	GLuint p = uisrc[i];
		2510	SWAP4BYTE(p);
		2511	rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
		2512	rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
		2513	rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
		2514	rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
		2515	}
		2516	}
		2517	else {
		2518	const GLuint uisrc = (const GLuint ) src;
		2519	GLuint i;
		2520	for (i = 0; i < n; i ++) {
		2521	GLuint p = uisrc[i];
		2522	rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
		2523	rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
		2524	rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
		2525	rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
		2526	}
		2527	}
		2528	break;
		2529	default:
		2530	_mesa_problem(NULL, "bad srcType in extract float data");
		2531	break;
		2532	}
		2533	}
		2534
		2535
		2536
		2537	/*
		2538	* Unpack a row of color image data from a client buffer according to
		2539	* the pixel unpacking parameters.
		2540	* Return GLubyte values in the specified dest image format.
		2541	* This is (or will be) used by glDrawPixels and glTexImage?D().
		2542	* Input: ctx - the context
		2543	* n - number of pixels in the span
		2544	* dstFormat - format of destination color array
		2545	* dest - the destination color array
		2546	* srcFormat - source image format
		2547	* srcType - source image datatype
		2548	* source - source image pointer
		2549	* srcPacking - pixel unpacking parameters
		2550	* transferOps - bitmask of IMAGE_*_BIT values of operations to apply
		2551	*
		2552	* XXX perhaps expand this to process whole images someday.
		2553	*/
		2554	void
		2555	_mesa_unpack_chan_color_span( GLcontext *ctx,
		2556	GLuint n, GLenum dstFormat, GLchan dest[],
		2557	GLenum srcFormat, GLenum srcType,
		2558	const GLvoid *source,
		2559	const struct gl_pixelstore_attrib *srcPacking,
		2560	GLuint transferOps )
		2561	{
		2562	ASSERT(dstFormat == GL_ALPHA \|\|
		2563	dstFormat == GL_LUMINANCE \|\|
		2564	dstFormat == GL_LUMINANCE_ALPHA \|\|
		2565	dstFormat == GL_INTENSITY \|\|
		2566	dstFormat == GL_RGB \|\|
		2567	dstFormat == GL_RGBA \|\|
		2568	dstFormat == GL_COLOR_INDEX);
		2569
		2570	ASSERT(srcFormat == GL_RED \|\|
		2571	srcFormat == GL_GREEN \|\|
		2572	srcFormat == GL_BLUE \|\|
		2573	srcFormat == GL_ALPHA \|\|
		2574	srcFormat == GL_LUMINANCE \|\|
		2575	srcFormat == GL_LUMINANCE_ALPHA \|\|
		2576	srcFormat == GL_INTENSITY \|\|
		2577	srcFormat == GL_RGB \|\|
		2578	srcFormat == GL_BGR \|\|
		2579	srcFormat == GL_RGBA \|\|
		2580	srcFormat == GL_BGRA \|\|
		2581	srcFormat == GL_ABGR_EXT \|\|
		2582	srcFormat == GL_COLOR_INDEX);
		2583
		2584	ASSERT(srcType == GL_BITMAP \|\|
		2585	srcType == GL_UNSIGNED_BYTE \|\|
		2586	srcType == GL_BYTE \|\|
		2587	srcType == GL_UNSIGNED_SHORT \|\|
		2588	srcType == GL_SHORT \|\|
		2589	srcType == GL_UNSIGNED_INT \|\|
		2590	srcType == GL_INT \|\|
		2591	srcType == GL_FLOAT \|\|
		2592	srcType == GL_UNSIGNED_BYTE_3_3_2 \|\|
		2593	srcType == GL_UNSIGNED_BYTE_2_3_3_REV \|\|
		2594	srcType == GL_UNSIGNED_SHORT_5_6_5 \|\|
		2595	srcType == GL_UNSIGNED_SHORT_5_6_5_REV \|\|
		2596	srcType == GL_UNSIGNED_SHORT_4_4_4_4 \|\|
		2597	srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV \|\|
		2598	srcType == GL_UNSIGNED_SHORT_5_5_5_1 \|\|
		2599	srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV \|\|
		2600	srcType == GL_UNSIGNED_INT_8_8_8_8 \|\|
		2601	srcType == GL_UNSIGNED_INT_8_8_8_8_REV \|\|
		2602	srcType == GL_UNSIGNED_INT_10_10_10_2 \|\|
		2603	srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
		2604
		2605	/* Try simple cases first */
		2606	if (transferOps == 0 ){
		2607	if (srcType == CHAN_TYPE) {
		2608	if (dstFormat == GL_RGBA) {
		2609	if (srcFormat == GL_RGBA) {
		2610	MEMCPY( dest, source, n * 4 * sizeof(GLchan) );
		2611	return;
		2612	}
		2613	else if (srcFormat == GL_RGB) {
		2614	GLuint i;
		2615	const GLchan src = (const GLchan ) source;
		2616	GLchan *dst = dest;
		2617	for (i = 0; i < n; i++) {
		2618	dst[0] = src[0];
		2619	dst[1] = src[1];
		2620	dst[2] = src[2];
		2621	dst[3] = CHAN_MAX;
		2622	src += 3;
		2623	dst += 4;
		2624	}
		2625	return;
		2626	}
		2627	}
		2628	else if (dstFormat == GL_RGB) {
		2629	if (srcFormat == GL_RGB) {
		2630	MEMCPY( dest, source, n * 3 * sizeof(GLchan) );
		2631	return;
		2632	}
		2633	else if (srcFormat == GL_RGBA) {
		2634	GLuint i;
		2635	const GLchan src = (const GLchan ) source;
		2636	GLchan *dst = dest;
		2637	for (i = 0; i < n; i++) {
		2638	dst[0] = src[0];
		2639	dst[1] = src[1];
		2640	dst[2] = src[2];
		2641	src += 4;
		2642	dst += 3;
		2643	}
		2644	return;
		2645	}
		2646	}
		2647	else if (dstFormat == srcFormat) {
		2648	GLint comps = _mesa_components_in_format(srcFormat);
		2649	assert(comps > 0);
		2650	MEMCPY( dest, source, n * comps * sizeof(GLchan) );
		2651	return;
		2652	}
		2653	}
		2654	/*
		2655	* Common situation, loading 8bit RGBA/RGB source images
		2656	* into 16/32 bit destination. (OSMesa16/32)
		2657	*/
		2658	else if (srcType == GL_UNSIGNED_BYTE) {
		2659	if (dstFormat == GL_RGBA) {
		2660	if (srcFormat == GL_RGB) {
		2661	GLuint i;
		2662	const GLubyte src = (const GLubyte ) source;
		2663	GLchan *dst = dest;
		2664	for (i = 0; i < n; i++) {
		2665	dst[0] = UBYTE_TO_CHAN(src[0]);
		2666	dst[1] = UBYTE_TO_CHAN(src[1]);
		2667	dst[2] = UBYTE_TO_CHAN(src[2]);
		2668	dst[3] = CHAN_MAX;
		2669	src += 3;
		2670	dst += 4;
		2671	}
		2672	return;
		2673	}
		2674	else if (srcFormat == GL_RGBA) {
		2675	GLuint i;
		2676	const GLubyte src = (const GLubyte ) source;
		2677	GLchan *dst = dest;
		2678	for (i = 0; i < n; i++) {
		2679	dst[0] = UBYTE_TO_CHAN(src[0]);
		2680	dst[1] = UBYTE_TO_CHAN(src[1]);
		2681	dst[2] = UBYTE_TO_CHAN(src[2]);
		2682	dst[3] = UBYTE_TO_CHAN(src[3]);
		2683	src += 4;
		2684	dst += 4;
		2685	}
		2686	return;
		2687	}
		2688	}
		2689	else if (dstFormat == GL_RGB) {
		2690	if (srcFormat == GL_RGB) {
		2691	GLuint i;
		2692	const GLubyte src = (const GLubyte ) source;
		2693	GLchan *dst = dest;
		2694	for (i = 0; i < n; i++) {
		2695	dst[0] = UBYTE_TO_CHAN(src[0]);
		2696	dst[1] = UBYTE_TO_CHAN(src[1]);
		2697	dst[2] = UBYTE_TO_CHAN(src[2]);
		2698	src += 3;
		2699	dst += 3;
		2700	}
		2701	return;
		2702	}
		2703	else if (srcFormat == GL_RGBA) {
		2704	GLuint i;
		2705	const GLubyte src = (const GLubyte ) source;
		2706	GLchan *dst = dest;
		2707	for (i = 0; i < n; i++) {
		2708	dst[0] = UBYTE_TO_CHAN(src[0]);
		2709	dst[1] = UBYTE_TO_CHAN(src[1]);
		2710	dst[2] = UBYTE_TO_CHAN(src[2]);
		2711	src += 4;
		2712	dst += 3;
		2713	}
		2714	return;
		2715	}
		2716	}
		2717	}
		2718	}
		2719
		2720
		2721	/* general solution begins here */
		2722	{
		2723	GLint dstComponents;
		2724	GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
		2725	GLint dstLuminanceIndex, dstIntensityIndex;
		2726	DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */
		2727	CHECKARRAY(rgba, return); /* mac 32k limitation */
		2728
		2729	dstComponents = _mesa_components_in_format( dstFormat );
		2730	/* source & dest image formats should have been error checked by now */
		2731	assert(dstComponents > 0);
		2732
		2733	/*
		2734	* Extract image data and convert to RGBA floats
		2735	*/
		2736	assert(n <= MAX_WIDTH);
		2737	if (srcFormat == GL_COLOR_INDEX) {
		2738	GLuint indexes[MAX_WIDTH];
		2739	extract_uint_indexes(n, indexes, srcFormat, srcType, source,
		2740	srcPacking);
		2741
		2742	if (dstFormat == GL_COLOR_INDEX
		2743	&& (transferOps & IMAGE_MAP_COLOR_BIT)) {
		2744	_mesa_map_ci(ctx, n, indexes);
		2745	}
		2746	if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
		2747	_mesa_shift_and_offset_ci(ctx, n, indexes);
		2748	}
		2749
		2750	if (dstFormat == GL_COLOR_INDEX) {
		2751	/* convert to GLchan and return */
		2752	GLuint i;
		2753	for (i = 0; i < n; i++) {
		2754	dest[i] = (GLchan) (indexes[i] & 0xff);
		2755	}
		2756	UNDEFARRAY(rgba); /* mac 32k limitation */
		2757	return;
		2758	}
		2759	else {
		2760	/* Convert indexes to RGBA */
		2761	_mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
		2762	}
		2763	}
		2764	else {
		2765	extract_float_rgba(n, rgba, srcFormat, srcType, source,
		2766	srcPacking->SwapBytes);
		2767
		2768	/* scale and bias colors */
		2769	if (transferOps & IMAGE_SCALE_BIAS_BIT) {
		2770	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		2771	ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
		2772	ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
		2773	ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
		2774	ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
		2775	}
		2776	/* color map lookup */
		2777	if (transferOps & IMAGE_MAP_COLOR_BIT) {
		2778	_mesa_map_rgba(ctx, n, rgba);
		2779	}
		2780	}
		2781
		2782	if (transferOps) {
		2783	/* GL_COLOR_TABLE lookup */
		2784	if (transferOps & IMAGE_COLOR_TABLE_BIT) {
		2785	_mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
		2786	}
		2787	/* convolution */
		2788	if (transferOps & IMAGE_CONVOLUTION_BIT) {
		2789	/* this has to be done in the calling code */
		2790	}
		2791	/* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
		2792	if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
		2793	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		2794	ctx->Pixel.PostConvolutionScale[RCOMP],
		2795	ctx->Pixel.PostConvolutionScale[GCOMP],
		2796	ctx->Pixel.PostConvolutionScale[BCOMP],
		2797	ctx->Pixel.PostConvolutionScale[ACOMP],
		2798	ctx->Pixel.PostConvolutionBias[RCOMP],
		2799	ctx->Pixel.PostConvolutionBias[GCOMP],
		2800	ctx->Pixel.PostConvolutionBias[BCOMP],
		2801	ctx->Pixel.PostConvolutionBias[ACOMP]);
		2802	}
		2803	/* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
		2804	if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
		2805	_mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
		2806	}
		2807	/* color matrix transform */
		2808	if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
		2809	_mesa_transform_rgba(ctx, n, rgba);
		2810	}
		2811	/* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
		2812	if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
		2813	_mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
		2814	}
		2815	/* update histogram count */
		2816	if (transferOps & IMAGE_HISTOGRAM_BIT) {
		2817	_mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
		2818	}
		2819	/* min/max here */
		2820	if (transferOps & IMAGE_MIN_MAX_BIT) {
		2821	_mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
		2822	}
		2823	}
		2824
		2825	/* clamp to [0,1] */
		2826	#if CHAN_TYPE != GL_FLOAT
		2827	{
		2828	GLuint i;
		2829	for (i = 0; i < n; i++) {
		2830	rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
		2831	rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
		2832	rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
		2833	rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
		2834	}
		2835	}
		2836	#endif
		2837
		2838	/* Now determine which color channels we need to produce.
		2839	* And determine the dest index (offset) within each color tuple.
		2840	*/
		2841	switch (dstFormat) {
		2842	case GL_ALPHA:
		2843	dstAlphaIndex = 0;
		2844	dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
		2845	dstLuminanceIndex = dstIntensityIndex = -1;
		2846	break;
		2847	case GL_LUMINANCE:
		2848	dstLuminanceIndex = 0;
		2849	dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
		2850	dstIntensityIndex = -1;
		2851	break;
		2852	case GL_LUMINANCE_ALPHA:
		2853	dstLuminanceIndex = 0;
		2854	dstAlphaIndex = 1;
		2855	dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
		2856	dstIntensityIndex = -1;
		2857	break;
		2858	case GL_INTENSITY:
		2859	dstIntensityIndex = 0;
		2860	dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
		2861	dstLuminanceIndex = -1;
		2862	break;
		2863	case GL_RGB:
		2864	dstRedIndex = 0;
		2865	dstGreenIndex = 1;
		2866	dstBlueIndex = 2;
		2867	dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
		2868	break;
		2869	case GL_RGBA:
		2870	dstRedIndex = 0;
		2871	dstGreenIndex = 1;
		2872	dstBlueIndex = 2;
		2873	dstAlphaIndex = 3;
		2874	dstLuminanceIndex = dstIntensityIndex = -1;
		2875	break;
		2876	default:
		2877	_mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
		2878	UNDEFARRAY(rgba); /* mac 32k limitation */
		2879	return;
		2880	}
		2881
		2882
		2883	/* Now return the GLchan data in the requested dstFormat */
		2884
		2885	if (dstRedIndex >= 0) {
		2886	GLchan *dst = dest;
		2887	GLuint i;
		2888	for (i = 0; i < n; i++) {
		2889	CLAMPED_FLOAT_TO_CHAN(dst[dstRedIndex], rgba[i][RCOMP]);
		2890	dst += dstComponents;
		2891	}
		2892	}
		2893
		2894	if (dstGreenIndex >= 0) {
		2895	GLchan *dst = dest;
		2896	GLuint i;
		2897	for (i = 0; i < n; i++) {
		2898	CLAMPED_FLOAT_TO_CHAN(dst[dstGreenIndex], rgba[i][GCOMP]);
		2899	dst += dstComponents;
		2900	}
		2901	}
		2902
		2903	if (dstBlueIndex >= 0) {
		2904	GLchan *dst = dest;
		2905	GLuint i;
		2906	for (i = 0; i < n; i++) {
		2907	CLAMPED_FLOAT_TO_CHAN(dst[dstBlueIndex], rgba[i][BCOMP]);
		2908	dst += dstComponents;
		2909	}
		2910	}
		2911
		2912	if (dstAlphaIndex >= 0) {
		2913	GLchan *dst = dest;
		2914	GLuint i;
		2915	for (i = 0; i < n; i++) {
		2916	CLAMPED_FLOAT_TO_CHAN(dst[dstAlphaIndex], rgba[i][ACOMP]);
		2917	dst += dstComponents;
		2918	}
		2919	}
		2920
		2921	if (dstIntensityIndex >= 0) {
		2922	GLchan *dst = dest;
		2923	GLuint i;
		2924	assert(dstIntensityIndex == 0);
		2925	assert(dstComponents == 1);
		2926	for (i = 0; i < n; i++) {
		2927	/* Intensity comes from red channel */
		2928	CLAMPED_FLOAT_TO_CHAN(dst[i], rgba[i][RCOMP]);
		2929	}
		2930	}
		2931
		2932	if (dstLuminanceIndex >= 0) {
		2933	GLchan *dst = dest;
		2934	GLuint i;
		2935	assert(dstLuminanceIndex == 0);
		2936	for (i = 0; i < n; i++) {
		2937	/* Luminance comes from red channel */
		2938	CLAMPED_FLOAT_TO_CHAN(dst[0], rgba[i][RCOMP]);
		2939	dst += dstComponents;
		2940	}
		2941	}
		2942	UNDEFARRAY(rgba); /* mac 32k limitation */
		2943	}
		2944	}
		2945
		2946
		2947	void
		2948	_mesa_unpack_float_color_span( GLcontext *ctx,
		2949	GLuint n, GLenum dstFormat, GLfloat dest[],
		2950	GLenum srcFormat, GLenum srcType,
		2951	const GLvoid *source,
		2952	const struct gl_pixelstore_attrib *srcPacking,
		2953	GLuint transferOps, GLboolean clamp )
		2954	{
		2955	ASSERT(dstFormat == GL_ALPHA \|\|
		2956	dstFormat == GL_LUMINANCE \|\|
		2957	dstFormat == GL_LUMINANCE_ALPHA \|\|
		2958	dstFormat == GL_INTENSITY \|\|
		2959	dstFormat == GL_RGB \|\|
		2960	dstFormat == GL_RGBA \|\|
		2961	dstFormat == GL_COLOR_INDEX);
		2962
		2963	ASSERT(srcFormat == GL_RED \|\|
		2964	srcFormat == GL_GREEN \|\|
		2965	srcFormat == GL_BLUE \|\|
		2966	srcFormat == GL_ALPHA \|\|
		2967	srcFormat == GL_LUMINANCE \|\|
		2968	srcFormat == GL_LUMINANCE_ALPHA \|\|
		2969	srcFormat == GL_INTENSITY \|\|
		2970	srcFormat == GL_RGB \|\|
		2971	srcFormat == GL_BGR \|\|
		2972	srcFormat == GL_RGBA \|\|
		2973	srcFormat == GL_BGRA \|\|
		2974	srcFormat == GL_ABGR_EXT \|\|
		2975	srcFormat == GL_COLOR_INDEX);
		2976
		2977	ASSERT(srcType == GL_BITMAP \|\|
		2978	srcType == GL_UNSIGNED_BYTE \|\|
		2979	srcType == GL_BYTE \|\|
		2980	srcType == GL_UNSIGNED_SHORT \|\|
		2981	srcType == GL_SHORT \|\|
		2982	srcType == GL_UNSIGNED_INT \|\|
		2983	srcType == GL_INT \|\|
		2984	srcType == GL_FLOAT \|\|
		2985	srcType == GL_UNSIGNED_BYTE_3_3_2 \|\|
		2986	srcType == GL_UNSIGNED_BYTE_2_3_3_REV \|\|
		2987	srcType == GL_UNSIGNED_SHORT_5_6_5 \|\|
		2988	srcType == GL_UNSIGNED_SHORT_5_6_5_REV \|\|
		2989	srcType == GL_UNSIGNED_SHORT_4_4_4_4 \|\|
		2990	srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV \|\|
		2991	srcType == GL_UNSIGNED_SHORT_5_5_5_1 \|\|
		2992	srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV \|\|
		2993	srcType == GL_UNSIGNED_INT_8_8_8_8 \|\|
		2994	srcType == GL_UNSIGNED_INT_8_8_8_8_REV \|\|
		2995	srcType == GL_UNSIGNED_INT_10_10_10_2 \|\|
		2996	srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
		2997
		2998	/* general solution, no special cases, yet */
		2999	{
		3000	GLint dstComponents;
		3001	GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
		3002	GLint dstLuminanceIndex, dstIntensityIndex;
		3003	DEFMARRAY(GLfloat, rgba, MAX_WIDTH, 4); /* mac 32k limitation */
		3004	CHECKARRAY(rgba, return); /* mac 32k limitation */
		3005
		3006	dstComponents = _mesa_components_in_format( dstFormat );
		3007	/* source & dest image formats should have been error checked by now */
		3008	assert(dstComponents > 0);
		3009
		3010	/*
		3011	* Extract image data and convert to RGBA floats
		3012	*/
		3013	assert(n <= MAX_WIDTH);
		3014	if (srcFormat == GL_COLOR_INDEX) {
		3015	GLuint indexes[MAX_WIDTH];
		3016	extract_uint_indexes(n, indexes, srcFormat, srcType, source,
		3017	srcPacking);
		3018
		3019	if (dstFormat == GL_COLOR_INDEX
		3020	&& (transferOps & IMAGE_MAP_COLOR_BIT)) {
		3021	_mesa_map_ci(ctx, n, indexes);
		3022	}
		3023	if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
		3024	_mesa_shift_and_offset_ci(ctx, n, indexes);
		3025	}
		3026
		3027	if (dstFormat == GL_COLOR_INDEX) {
		3028	/* convert to GLchan and return */
		3029	GLuint i;
		3030	for (i = 0; i < n; i++) {
		3031	dest[i] = (GLchan) (indexes[i] & 0xff);
		3032	}
		3033	UNDEFARRAY(rgba); /* mac 32k limitation */
		3034	return;
		3035	}
		3036	else {
		3037	/* Convert indexes to RGBA */
		3038	_mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
		3039	}
		3040	}
		3041	else {
		3042	extract_float_rgba(n, rgba, srcFormat, srcType, source,
		3043	srcPacking->SwapBytes);
		3044
		3045	/* scale and bias colors */
		3046	if (transferOps & IMAGE_SCALE_BIAS_BIT) {
		3047	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		3048	ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
		3049	ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
		3050	ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
		3051	ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
		3052	}
		3053	/* color map lookup */
		3054	if (transferOps & IMAGE_MAP_COLOR_BIT) {
		3055	_mesa_map_rgba(ctx, n, rgba);
		3056	}
		3057	}
		3058
		3059	if (transferOps) {
		3060	/* GL_COLOR_TABLE lookup */
		3061	if (transferOps & IMAGE_COLOR_TABLE_BIT) {
		3062	_mesa_lookup_rgba(&ctx->ColorTable, n, rgba);
		3063	}
		3064	/* convolution */
		3065	if (transferOps & IMAGE_CONVOLUTION_BIT) {
		3066	/* XXX to do */
		3067	}
		3068	/* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
		3069	if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
		3070	_mesa_scale_and_bias_rgba(ctx, n, rgba,
		3071	ctx->Pixel.PostConvolutionScale[RCOMP],
		3072	ctx->Pixel.PostConvolutionScale[GCOMP],
		3073	ctx->Pixel.PostConvolutionScale[BCOMP],
		3074	ctx->Pixel.PostConvolutionScale[ACOMP],
		3075	ctx->Pixel.PostConvolutionBias[RCOMP],
		3076	ctx->Pixel.PostConvolutionBias[GCOMP],
		3077	ctx->Pixel.PostConvolutionBias[BCOMP],
		3078	ctx->Pixel.PostConvolutionBias[ACOMP]);
		3079	}
		3080	/* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
		3081	if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
		3082	_mesa_lookup_rgba(&ctx->PostConvolutionColorTable, n, rgba);
		3083	}
		3084	/* color matrix transform */
		3085	if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
		3086	_mesa_transform_rgba(ctx, n, rgba);
		3087	}
		3088	/* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
		3089	if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
		3090	_mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, n, rgba);
		3091	}
		3092	/* update histogram count */
		3093	if (transferOps & IMAGE_HISTOGRAM_BIT) {
		3094	_mesa_update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
		3095	}
		3096	/* min/max here */
		3097	if (transferOps & IMAGE_MIN_MAX_BIT) {
		3098	_mesa_update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
		3099	}
		3100	}
		3101
		3102	/* clamp to [0,1] */
		3103	#if CHAN_TYPE != GL_FLOAT
		3104	if (clamp) {
		3105	GLuint i;
		3106	for (i = 0; i < n; i++) {
		3107	rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
		3108	rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
		3109	rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
		3110	rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
		3111	}
		3112	}
		3113	#endif
		3114
		3115	/* Now determine which color channels we need to produce.
		3116	* And determine the dest index (offset) within each color tuple.
		3117	*/
		3118	switch (dstFormat) {
		3119	case GL_ALPHA:
		3120	dstAlphaIndex = 0;
		3121	dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
		3122	dstLuminanceIndex = dstIntensityIndex = -1;
		3123	break;
		3124	case GL_LUMINANCE:
		3125	dstLuminanceIndex = 0;
		3126	dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
		3127	dstIntensityIndex = -1;
		3128	break;
		3129	case GL_LUMINANCE_ALPHA:
		3130	dstLuminanceIndex = 0;
		3131	dstAlphaIndex = 1;
		3132	dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
		3133	dstIntensityIndex = -1;
		3134	break;
		3135	case GL_INTENSITY:
		3136	dstIntensityIndex = 0;
		3137	dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
		3138	dstLuminanceIndex = -1;
		3139	break;
		3140	case GL_RGB:
		3141	dstRedIndex = 0;
		3142	dstGreenIndex = 1;
		3143	dstBlueIndex = 2;
		3144	dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
		3145	break;
		3146	case GL_RGBA:
		3147	dstRedIndex = 0;
		3148	dstGreenIndex = 1;
		3149	dstBlueIndex = 2;
		3150	dstAlphaIndex = 3;
		3151	dstLuminanceIndex = dstIntensityIndex = -1;
		3152	break;
		3153	default:
		3154	_mesa_problem(ctx, "bad dstFormat in _mesa_unpack_float_color_span()");
		3155	UNDEFARRAY(rgba); /* mac 32k limitation */
		3156	return;
		3157	}
		3158
		3159	/* Now pack results in the requested dstFormat */
		3160	if (dstRedIndex >= 0) {
		3161	GLfloat *dst = dest;
		3162	GLuint i;
		3163	for (i = 0; i < n; i++) {
		3164	dst[dstRedIndex] = rgba[i][RCOMP];
		3165	dst += dstComponents;
		3166	}
		3167	}
		3168
		3169	if (dstGreenIndex >= 0) {
		3170	GLfloat *dst = dest;
		3171	GLuint i;
		3172	for (i = 0; i < n; i++) {
		3173	dst[dstGreenIndex] = rgba[i][GCOMP];
		3174	dst += dstComponents;
		3175	}
		3176	}
		3177
		3178	if (dstBlueIndex >= 0) {
		3179	GLfloat *dst = dest;
		3180	GLuint i;
		3181	for (i = 0; i < n; i++) {
		3182	dst[dstBlueIndex] = rgba[i][BCOMP];
		3183	dst += dstComponents;
		3184	}
		3185	}
		3186
		3187	if (dstAlphaIndex >= 0) {
		3188	GLfloat *dst = dest;
		3189	GLuint i;
		3190	for (i = 0; i < n; i++) {
		3191	dst[dstAlphaIndex] = rgba[i][ACOMP];
		3192	dst += dstComponents;
		3193	}
		3194	}
		3195
		3196	if (dstIntensityIndex >= 0) {
		3197	GLfloat *dst = dest;
		3198	GLuint i;
		3199	assert(dstIntensityIndex == 0);
		3200	assert(dstComponents == 1);
		3201	for (i = 0; i < n; i++) {
		3202	/* Intensity comes from red channel */
		3203	dst[i] = rgba[i][RCOMP];
		3204	}
		3205	}
		3206
		3207	if (dstLuminanceIndex >= 0) {
		3208	GLfloat *dst = dest;
		3209	GLuint i;
		3210	assert(dstLuminanceIndex == 0);
		3211	for (i = 0; i < n; i++) {
		3212	/* Luminance comes from red channel */
		3213	dst[0] = rgba[i][RCOMP];
		3214	dst += dstComponents;
		3215	}
		3216	}
		3217	UNDEFARRAY(rgba); /* mac 32k limitation */
		3218	}
		3219	}
		3220
		3221
		3222
		3223
		3224	/*
		3225	* Unpack a row of color index data from a client buffer according to
		3226	* the pixel unpacking parameters.
		3227	* This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
		3228	*
		3229	* Args: ctx - the context
		3230	* n - number of pixels
		3231	* dstType - destination datatype
		3232	* dest - destination array
		3233	* srcType - source pixel type
		3234	* source - source data pointer
		3235	* srcPacking - pixel unpacking parameters
		3236	* transferOps - the pixel transfer operations to apply
		3237	*/
		3238	void
		3239	_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
		3240	GLenum dstType, GLvoid *dest,
		3241	GLenum srcType, const GLvoid *source,
		3242	const struct gl_pixelstore_attrib *srcPacking,
		3243	GLuint transferOps )
		3244	{
		3245	ASSERT(srcType == GL_BITMAP \|\|
		3246	srcType == GL_UNSIGNED_BYTE \|\|
		3247	srcType == GL_BYTE \|\|
		3248	srcType == GL_UNSIGNED_SHORT \|\|
		3249	srcType == GL_SHORT \|\|
		3250	srcType == GL_UNSIGNED_INT \|\|
		3251	srcType == GL_INT \|\|
		3252	srcType == GL_FLOAT);
		3253
		3254	ASSERT(dstType == GL_UNSIGNED_BYTE \|\|
		3255	dstType == GL_UNSIGNED_SHORT \|\|
		3256	dstType == GL_UNSIGNED_INT);
		3257
		3258
		3259	transferOps &= (IMAGE_MAP_COLOR_BIT \| IMAGE_SHIFT_OFFSET_BIT);
		3260
		3261	/*
		3262	* Try simple cases first
		3263	*/
		3264	if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
		3265	&& dstType == GL_UNSIGNED_BYTE) {
		3266	MEMCPY(dest, source, n * sizeof(GLubyte));
		3267	}
		3268	else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
		3269	&& dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
		3270	MEMCPY(dest, source, n * sizeof(GLuint));
		3271	}
		3272	else {
		3273	/*
		3274	* general solution
		3275	*/
		3276	GLuint indexes[MAX_WIDTH];
		3277	assert(n <= MAX_WIDTH);
		3278
		3279	extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
		3280	srcPacking);
		3281
		3282	if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
		3283	/* shift and offset indexes */
		3284	_mesa_shift_and_offset_ci(ctx, n, indexes);
		3285	}
		3286	if (transferOps & IMAGE_MAP_COLOR_BIT) {
		3287	/* Apply lookup table */
		3288	_mesa_map_ci(ctx, n, indexes);
		3289	}
		3290
		3291	/* convert to dest type */
		3292	switch (dstType) {
		3293	case GL_UNSIGNED_BYTE:
		3294	{
		3295	GLubyte dst = (GLubyte ) dest;
		3296	GLuint i;
		3297	for (i = 0; i < n; i++) {
		3298	dst[i] = (GLubyte) (indexes[i] & 0xff);
		3299	}
		3300	}
		3301	break;
		3302	case GL_UNSIGNED_SHORT:
		3303	{
		3304	GLuint dst = (GLuint ) dest;
		3305	GLuint i;
		3306	for (i = 0; i < n; i++) {
		3307	dst[i] = (GLushort) (indexes[i] & 0xffff);
		3308	}
		3309	}
		3310	break;
		3311	case GL_UNSIGNED_INT:
		3312	MEMCPY(dest, indexes, n * sizeof(GLuint));
		3313	break;
		3314	default:
		3315	_mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
		3316	}
		3317	}
		3318	}
		3319
		3320
		3321	void
		3322	_mesa_pack_index_span( const GLcontext *ctx, GLuint n,
		3323	GLenum dstType, GLvoid dest, const GLuint source,
		3324	const struct gl_pixelstore_attrib *dstPacking,
		3325	GLuint transferOps )
		3326	{
		3327	GLuint indexes[MAX_WIDTH];
		3328
		3329	ASSERT(n <= MAX_WIDTH);
		3330
		3331	transferOps &= (IMAGE_MAP_COLOR_BIT \| IMAGE_SHIFT_OFFSET_BIT);
		3332
		3333	if (transferOps & (IMAGE_MAP_COLOR_BIT \| IMAGE_SHIFT_OFFSET_BIT)) {
		3334	/* make a copy of input */
		3335	MEMCPY(indexes, source, n * sizeof(GLuint));
		3336	if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
		3337	_mesa_shift_and_offset_ci( ctx, n, indexes);
		3338	}
		3339	if (transferOps & IMAGE_MAP_COLOR_BIT) {
		3340	_mesa_map_ci(ctx, n, indexes);
		3341	}
		3342	source = indexes;
		3343	}
		3344
		3345	switch (dstType) {
		3346	case GL_UNSIGNED_BYTE:
		3347	{
		3348	GLubyte dst = (GLubyte ) dest;
		3349	GLuint i;
		3350	for (i = 0; i < n; i++) {
		3351	*dst++ = (GLubyte) source[i];
		3352	}
		3353	}
		3354	break;
		3355	case GL_BYTE:
		3356	{
		3357	GLbyte dst = (GLbyte ) dest;
		3358	GLuint i;
		3359	for (i = 0; i < n; i++) {
		3360	dst[i] = (GLbyte) source[i];
		3361	}
		3362	}
		3363	break;
		3364	case GL_UNSIGNED_SHORT:
		3365	{
		3366	GLushort dst = (GLushort ) dest;
		3367	GLuint i;
		3368	for (i = 0; i < n; i++) {
		3369	dst[i] = (GLushort) source[i];
		3370	}
		3371	if (dstPacking->SwapBytes) {
		3372	_mesa_swap2( (GLushort *) dst, n );
		3373	}
		3374	}
		3375	break;
		3376	case GL_SHORT:
		3377	{
		3378	GLshort dst = (GLshort ) dest;
		3379	GLuint i;
		3380	for (i = 0; i < n; i++) {
		3381	dst[i] = (GLshort) source[i];
		3382	}
		3383	if (dstPacking->SwapBytes) {
		3384	_mesa_swap2( (GLushort *) dst, n );
		3385	}
		3386	}
		3387	break;
		3388	case GL_UNSIGNED_INT:
		3389	{
		3390	GLuint dst = (GLuint ) dest;
		3391	GLuint i;
		3392	for (i = 0; i < n; i++) {
		3393	dst[i] = (GLuint) source[i];
		3394	}
		3395	if (dstPacking->SwapBytes) {
		3396	_mesa_swap4( (GLuint *) dst, n );
		3397	}
		3398	}
		3399	break;
		3400	case GL_INT:
		3401	{
		3402	GLint dst = (GLint ) dest;
		3403	GLuint i;
		3404	for (i = 0; i < n; i++) {
		3405	dst[i] = (GLint) source[i];
		3406	}
		3407	if (dstPacking->SwapBytes) {
		3408	_mesa_swap4( (GLuint *) dst, n );
		3409	}
		3410	}
		3411	break;
		3412	case GL_FLOAT:
		3413	{
		3414	GLfloat dst = (GLfloat ) dest;
		3415	GLuint i;
		3416	for (i = 0; i < n; i++) {
		3417	dst[i] = (GLfloat) source[i];
		3418	}
		3419	if (dstPacking->SwapBytes) {
		3420	_mesa_swap4( (GLuint *) dst, n );
		3421	}
		3422	}
		3423	break;
		3424	default:
		3425	_mesa_problem(ctx, "bad type in _mesa_pack_index_span");
		3426	}
		3427	}
		3428
		3429
		3430
		3431	/*
		3432	* Unpack a row of stencil data from a client buffer according to
		3433	* the pixel unpacking parameters.
		3434	* This is (or will be) used by glDrawPixels
		3435	*
		3436	* Args: ctx - the context
		3437	* n - number of pixels
		3438	* dstType - destination datatype
		3439	* dest - destination array
		3440	* srcType - source pixel type
		3441	* source - source data pointer
		3442	* srcPacking - pixel unpacking parameters
		3443	* transferOps - apply offset/bias/lookup ops?
		3444	*/
		3445	void
		3446	_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
		3447	GLenum dstType, GLvoid *dest,
		3448	GLenum srcType, const GLvoid *source,
		3449	const struct gl_pixelstore_attrib *srcPacking,
		3450	GLuint transferOps )
		3451	{
		3452	ASSERT(srcType == GL_BITMAP \|\|
		3453	srcType == GL_UNSIGNED_BYTE \|\|
		3454	srcType == GL_BYTE \|\|
		3455	srcType == GL_UNSIGNED_SHORT \|\|
		3456	srcType == GL_SHORT \|\|
		3457	srcType == GL_UNSIGNED_INT \|\|
		3458	srcType == GL_INT \|\|
		3459	srcType == GL_FLOAT);
		3460
		3461	ASSERT(dstType == GL_UNSIGNED_BYTE \|\|
		3462	dstType == GL_UNSIGNED_SHORT \|\|
		3463	dstType == GL_UNSIGNED_INT);
		3464
		3465	/* only shift and offset apply to stencil */
		3466	transferOps &= IMAGE_SHIFT_OFFSET_BIT;
		3467
		3468	/*
		3469	* Try simple cases first
		3470	*/
		3471	if (transferOps == 0 &&
		3472	srcType == GL_UNSIGNED_BYTE &&
		3473	dstType == GL_UNSIGNED_BYTE) {
		3474	MEMCPY(dest, source, n * sizeof(GLubyte));
		3475	}
		3476	else if (transferOps == 0 &&
		3477	srcType == GL_UNSIGNED_INT &&
		3478	dstType == GL_UNSIGNED_INT &&
		3479	!srcPacking->SwapBytes) {
		3480	MEMCPY(dest, source, n * sizeof(GLuint));
		3481	}
		3482	else {
		3483	/*
		3484	* general solution
		3485	*/
		3486	GLuint indexes[MAX_WIDTH];
		3487	assert(n <= MAX_WIDTH);
		3488
		3489	extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
		3490	srcPacking);
		3491
		3492	if (transferOps) {
		3493	if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
		3494	/* shift and offset indexes */
		3495	_mesa_shift_and_offset_ci(ctx, n, indexes);
		3496	}
		3497
		3498	if (ctx->Pixel.MapStencilFlag) {
		3499	/* Apply stencil lookup table */
		3500	GLuint mask = ctx->Pixel.MapStoSsize - 1;
		3501	GLuint i;
		3502	for (i=0;i<n;i++) {
		3503	indexes[i] = ctx->Pixel.MapStoS[ indexes[i] & mask ];
		3504	}
		3505	}
		3506	}
		3507
		3508	/* convert to dest type */
		3509	switch (dstType) {
		3510	case GL_UNSIGNED_BYTE:
		3511	{
		3512	GLubyte dst = (GLubyte ) dest;
		3513	GLuint i;
		3514	for (i = 0; i < n; i++) {
		3515	dst[i] = (GLubyte) (indexes[i] & 0xff);
		3516	}
		3517	}
		3518	break;
		3519	case GL_UNSIGNED_SHORT:
		3520	{
		3521	GLuint dst = (GLuint ) dest;
		3522	GLuint i;
		3523	for (i = 0; i < n; i++) {
		3524	dst[i] = (GLushort) (indexes[i] & 0xffff);
		3525	}
		3526	}
		3527	break;
		3528	case GL_UNSIGNED_INT:
		3529	MEMCPY(dest, indexes, n * sizeof(GLuint));
		3530	break;
		3531	default:
		3532	_mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
		3533	}
		3534	}
		3535	}
		3536
		3537
		3538	void
		3539	_mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
		3540	GLenum dstType, GLvoid dest, const GLstencil source,
		3541	const struct gl_pixelstore_attrib *dstPacking )
		3542	{
		3543	GLstencil stencil[MAX_WIDTH];
		3544
		3545	ASSERT(n <= MAX_WIDTH);
		3546
		3547	if (ctx->Pixel.IndexShift \|\| ctx->Pixel.IndexOffset \|\|
		3548	ctx->Pixel.MapStencilFlag) {
		3549	/* make a copy of input */
		3550	MEMCPY(stencil, source, n * sizeof(GLstencil));
		3551	if (ctx->Pixel.IndexShift \|\| ctx->Pixel.IndexOffset) {
		3552	_mesa_shift_and_offset_stencil( ctx, n, stencil );
		3553	}
		3554	if (ctx->Pixel.MapStencilFlag) {
		3555	_mesa_map_stencil( ctx, n, stencil );
		3556	}
		3557	source = stencil;
		3558	}
		3559
		3560	switch (dstType) {
		3561	case GL_UNSIGNED_BYTE:
		3562	if (sizeof(GLstencil) == 8) {
		3563	MEMCPY( dest, source, n );
		3564	}
		3565	else {
		3566	GLubyte dst = (GLubyte ) dest;
		3567	GLuint i;
		3568	for (i=0;i<n;i++) {
		3569	dst[i] = (GLubyte) source[i];
		3570	}
		3571	}
		3572	break;
		3573	case GL_BYTE:
		3574	if (sizeof(GLstencil) == 8) {
		3575	MEMCPY( dest, source, n );
		3576	}
		3577	else {
		3578	GLbyte dst = (GLbyte ) dest;
		3579	GLuint i;
		3580	for (i=0;i<n;i++) {
		3581	dst[i] = (GLbyte) source[i];
		3582	}
		3583	}
		3584	break;
		3585	case GL_UNSIGNED_SHORT:
		3586	{
		3587	GLushort dst = (GLushort ) dest;
		3588	GLuint i;
		3589	for (i=0;i<n;i++) {
		3590	dst[i] = (GLushort) source[i];
		3591	}
		3592	if (dstPacking->SwapBytes) {
		3593	_mesa_swap2( (GLushort *) dst, n );
		3594	}
		3595	}
		3596	break;
		3597	case GL_SHORT:
		3598	{
		3599	GLshort dst = (GLshort ) dest;
		3600	GLuint i;
		3601	for (i=0;i<n;i++) {
		3602	dst[i] = (GLshort) source[i];
		3603	}
		3604	if (dstPacking->SwapBytes) {
		3605	_mesa_swap2( (GLushort *) dst, n );
		3606	}
		3607	}
		3608	break;
		3609	case GL_UNSIGNED_INT:
		3610	{
		3611	GLuint dst = (GLuint ) dest;
		3612	GLuint i;
		3613	for (i=0;i<n;i++) {
		3614	dst[i] = (GLuint) source[i];
		3615	}
		3616	if (dstPacking->SwapBytes) {
		3617	_mesa_swap4( (GLuint *) dst, n );
		3618	}
		3619	}
		3620	break;
		3621	case GL_INT:
		3622	{
		3623	GLint dst = (GLint ) dest;
		3624	GLuint i;
		3625	for (i=0;i<n;i++) {
		3626	*dst++ = (GLint) source[i];
		3627	}
		3628	if (dstPacking->SwapBytes) {
		3629	_mesa_swap4( (GLuint *) dst, n );
		3630	}
		3631	}
		3632	break;
		3633	case GL_FLOAT:
		3634	{
		3635	GLfloat dst = (GLfloat ) dest;
		3636	GLuint i;
		3637	for (i=0;i<n;i++) {
		3638	dst[i] = (GLfloat) source[i];
		3639	}
		3640	if (dstPacking->SwapBytes) {
		3641	_mesa_swap4( (GLuint *) dst, n );
		3642	}
		3643	}
		3644	break;
		3645	case GL_BITMAP:
		3646	if (dstPacking->LsbFirst) {
		3647	GLubyte dst = (GLubyte ) dest;
		3648	GLint shift = 0;
		3649	GLuint i;
		3650	for (i = 0; i < n; i++) {
		3651	if (shift == 0)
		3652	*dst = 0;
		3653	*dst \|= ((source[i] != 0) << shift);
		3654	shift++;
		3655	if (shift == 8) {
		3656	shift = 0;
		3657	dst++;
		3658	}
		3659	}
		3660	}
		3661	else {
		3662	GLubyte dst = (GLubyte ) dest;
		3663	GLint shift = 7;
		3664	GLuint i;
		3665	for (i = 0; i < n; i++) {
		3666	if (shift == 7)
		3667	*dst = 0;
		3668	*dst \|= ((source[i] != 0) << shift);
		3669	shift--;
		3670	if (shift < 0) {
		3671	shift = 7;
		3672	dst++;
		3673	}
		3674	}
		3675	}
		3676	break;
		3677	default:
		3678	_mesa_problem(ctx, "bad type in _mesa_pack_index_span");
		3679	}
		3680	}
		3681
		3682
		3683
		3684	void
		3685	_mesa_unpack_depth_span( const GLcontext ctx, GLuint n, GLfloat dest,
		3686	GLenum srcType, const GLvoid *source,
		3687	const struct gl_pixelstore_attrib *srcPacking )
		3688	{
		3689	switch (srcType) {
		3690	case GL_BYTE:
		3691	{
		3692	GLuint i;
		3693	const GLubyte src = (const GLubyte ) source;
		3694	for (i = 0; i < n; i++) {
		3695	dest[i] = BYTE_TO_FLOAT(src[i]);
		3696	}
		3697	}
		3698	break;
		3699	case GL_UNSIGNED_BYTE:
		3700	{
		3701	GLuint i;
		3702	const GLubyte src = (const GLubyte ) source;
		3703	for (i = 0; i < n; i++) {
		3704	dest[i] = UBYTE_TO_FLOAT(src[i]);
		3705	}
		3706	}
		3707	break;
		3708	case GL_SHORT:
		3709	{
		3710	GLuint i;
		3711	const GLshort src = (const GLshort ) source;
		3712	for (i = 0; i < n; i++) {
		3713	dest[i] = SHORT_TO_FLOAT(src[i]);
		3714	}
		3715	}
		3716	break;
		3717	case GL_UNSIGNED_SHORT:
		3718	{
		3719	GLuint i;
		3720	const GLushort src = (const GLushort ) source;
		3721	for (i = 0; i < n; i++) {
		3722	dest[i] = USHORT_TO_FLOAT(src[i]);
		3723	}
		3724	}
		3725	break;
		3726	case GL_INT:
		3727	{
		3728	GLuint i;
		3729	const GLint src = (const GLint ) source;
		3730	for (i = 0; i < n; i++) {
		3731	dest[i] = INT_TO_FLOAT(src[i]);
		3732	}
		3733	}
		3734	break;
		3735	case GL_UNSIGNED_INT:
		3736	{
		3737	GLuint i;
		3738	const GLuint src = (const GLuint ) source;
		3739	for (i = 0; i < n; i++) {
		3740	dest[i] = UINT_TO_FLOAT(src[i]);
		3741	}
		3742	}
		3743	break;
		3744	case GL_FLOAT:
		3745	MEMCPY(dest, source, n * sizeof(GLfloat));
		3746	break;
		3747	default:
		3748	_mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
		3749	return;
		3750	}
		3751
		3752
		3753	/* apply depth scale and bias and clamp to [0,1] */
		3754	if (ctx->Pixel.DepthScale != 1.0 \|\| ctx->Pixel.DepthBias != 0.0) {
		3755	GLuint i;
		3756	for (i = 0; i < n; i++) {
		3757	GLfloat d = dest[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
		3758	dest[i] = CLAMP(d, 0.0F, 1.0F);
		3759	}
		3760	}
		3761	}
		3762
		3763
		3764
		3765	/*
		3766	* Pack an array of depth values. The values are floats in [0,1].
		3767	*/
		3768	void
		3769	_mesa_pack_depth_span( const GLcontext ctx, GLuint n, GLvoid dest,
		3770	GLenum dstType, const GLfloat *depthSpan,
		3771	const struct gl_pixelstore_attrib *dstPacking )
		3772	{
		3773	GLfloat depthCopy[MAX_WIDTH];
		3774	const GLboolean bias_or_scale = ctx->Pixel.DepthBias != 0.0 \|\|
		3775	ctx->Pixel.DepthScale != 1.0;
		3776
		3777	ASSERT(n <= MAX_WIDTH);
		3778
		3779	if (bias_or_scale) {
		3780	GLuint i;
		3781	for (i = 0; i < n; i++) {
		3782	GLfloat d;
		3783	d = depthSpan[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias;
		3784	depthCopy[i] = CLAMP(d, 0.0F, 1.0F);
		3785	}
		3786	depthSpan = depthCopy;
		3787	}
		3788
		3789	switch (dstType) {
		3790	case GL_UNSIGNED_BYTE:
		3791	{
		3792	GLubyte dst = (GLubyte ) dest;
		3793	GLuint i;
		3794	for (i = 0; i < n; i++) {
		3795	dst[i] = FLOAT_TO_UBYTE( depthSpan[i] );
		3796	}
		3797	}
		3798	break;
		3799	case GL_BYTE:
		3800	{
		3801	GLbyte dst = (GLbyte ) dest;
		3802	GLuint i;
		3803	for (i = 0; i < n; i++) {
		3804	dst[i] = FLOAT_TO_BYTE( depthSpan[i] );
		3805	}
		3806	}
		3807	break;
		3808	case GL_UNSIGNED_SHORT:
		3809	{
		3810	GLushort dst = (GLushort ) dest;
		3811	GLuint i;
		3812	for (i = 0; i < n; i++) {
		3813	dst[i] = FLOAT_TO_USHORT( depthSpan[i] );
		3814	}
		3815	if (dstPacking->SwapBytes) {
		3816	_mesa_swap2( (GLushort *) dst, n );
		3817	}
		3818	}
		3819	break;
		3820	case GL_SHORT:
		3821	{
		3822	GLshort dst = (GLshort ) dest;
		3823	GLuint i;
		3824	for (i = 0; i < n; i++) {
		3825	dst[i] = FLOAT_TO_SHORT( depthSpan[i] );
		3826	}
		3827	if (dstPacking->SwapBytes) {
		3828	_mesa_swap2( (GLushort *) dst, n );
		3829	}
		3830	}
		3831	break;
		3832	case GL_UNSIGNED_INT:
		3833	{
		3834	GLuint dst = (GLuint ) dest;
		3835	GLuint i;
		3836	for (i = 0; i < n; i++) {
		3837	dst[i] = FLOAT_TO_UINT( depthSpan[i] );
		3838	}
		3839	if (dstPacking->SwapBytes) {
		3840	_mesa_swap4( (GLuint *) dst, n );
		3841	}
		3842	}
		3843	break;
		3844	case GL_INT:
		3845	{
		3846	GLint dst = (GLint ) dest;
		3847	GLuint i;
		3848	for (i = 0; i < n; i++) {
		3849	dst[i] = FLOAT_TO_INT( depthSpan[i] );
		3850	}
		3851	if (dstPacking->SwapBytes) {
		3852	_mesa_swap4( (GLuint *) dst, n );
		3853	}
		3854	}
		3855	break;
		3856	case GL_FLOAT:
		3857	{
		3858	GLfloat dst = (GLfloat ) dest;
		3859	GLuint i;
		3860	for (i = 0; i < n; i++) {
		3861	dst[i] = depthSpan[i];
		3862	}
		3863	if (dstPacking->SwapBytes) {
		3864	_mesa_swap4( (GLuint *) dst, n );
		3865	}
		3866	}
		3867	break;
		3868	default:
		3869	_mesa_problem(ctx, "bad type in _mesa_pack_depth_span");
		3870	}
		3871	}
		3872
		3873
		3874
		3875
		3876	/*
		3877	* Unpack image data. Apply byteswapping, byte flipping (bitmap).
		3878	* Return all image data in a contiguous block.
		3879	*/
		3880	void *
		3881	_mesa_unpack_image( GLsizei width, GLsizei height, GLsizei depth,
		3882	GLenum format, GLenum type, const GLvoid *pixels,
		3883	const struct gl_pixelstore_attrib *unpack )
		3884	{
		3885	GLint bytesPerRow, compsPerRow;
		3886	GLboolean flipBytes, swap2, swap4;
		3887
		3888	if (!pixels)
		3889	return NULL; /* not necessarily an error */
		3890
		3891	if (width <= 0 \|\| height <= 0 \|\| depth <= 0)
		3892	return NULL; /* generate error later */
		3893
		3894	if (format == GL_BITMAP) {
		3895	bytesPerRow = (width + 7) >> 3;
		3896	flipBytes = !unpack->LsbFirst;
		3897	swap2 = swap4 = GL_FALSE;
		3898	compsPerRow = 0;
		3899	}
		3900	else {
		3901	const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
		3902	const GLint components = _mesa_components_in_format(format);
		3903	GLint bytesPerComp;
		3904	if (bytesPerPixel <= 0 \|\| components <= 0)
		3905	return NULL; /* bad format or type. generate error later */
		3906	bytesPerRow = bytesPerPixel * width;
		3907	bytesPerComp = bytesPerPixel / components;
		3908	flipBytes = GL_FALSE;
		3909	swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
		3910	swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
		3911	compsPerRow = components * width;
		3912	assert(compsPerRow >= width);
		3913	}
		3914
		3915	{
		3916	GLubyte destBuffer = (GLubyte ) MALLOC(bytesPerRow * height * depth);
		3917	GLubyte *dst;
		3918	GLint img, row;
		3919	if (!destBuffer)
		3920	return NULL; /* generate GL_OUT_OF_MEMORY later */
		3921
		3922	dst = destBuffer;
		3923	for (img = 0; img < depth; img++) {
		3924	for (row = 0; row < height; row++) {
		3925	const GLvoid *src = _mesa_image_address(unpack, pixels,
		3926	width, height, format, type, img, row, 0);
		3927	MEMCPY(dst, src, bytesPerRow);
		3928	/* byte flipping/swapping */
		3929	if (flipBytes) {
		3930	flip_bytes((GLubyte *) dst, bytesPerRow);
		3931	}
		3932	else if (swap2) {
		3933	_mesa_swap2((GLushort*) dst, compsPerRow);
		3934	}
		3935	else if (swap4) {
		3936	_mesa_swap4((GLuint*) dst, compsPerRow);
		3937	}
		3938	dst += bytesPerRow;
		3939	}
		3940	}
		3941	return destBuffer;
		3942	}
		3943	}

Subversion Repositories shark

(root)/shark/trunk/ports/mesa/src/image.c @ 69 - Rev 55