WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/ports/mesa/src/texutil.c

Rev	Author	Line No.	Line
55	pj	1	/* $Id: texutil.c,v 1.1 2003-02-28 11:42:06 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	* Authors:
		27	* Gareth Hughes
		28	*/
		29
		30	/*
		31	* Description:
		32	* Functions for texture image conversion. This takes care of converting
		33	* typical GL_RGBA/GLubyte textures into hardware-specific formats.
		34	* We can handle non-standard row strides and pixel unpacking parameters.
		35	*/
		36
		37
		38	#include "glheader.h"
		39	#include "context.h"
		40	#include "enums.h"
		41	#include "image.h"
		42	#include "imports.h"
		43	#include "macros.h"
		44	#include "mtypes.h"
		45	#include "texformat.h"
		46	#include "texutil.h"
		47
		48
		49	#define DEBUG_TEXUTIL 0
		50
		51
		52	#ifdef MESA_BIG_ENDIAN
		53	#define APPEND16( a, b ) ( (a) << 16 \| (b) )
		54	#else
		55	#define APPEND16( a, b ) ( (a) \| (b) << 16 )
		56	#endif
		57
		58
		59	struct convert_info {
		60	GLint xoffset, yoffset, zoffset; /* Subimage offset */
		61	GLint width, height, depth; /* Subimage region */
		62
		63	GLint dstImageWidth, dstImageHeight; /* Dest image size */
		64	/* Needed for subimage replacement */
		65	GLenum format, type; /* Source (user) format and type */
		66
		67	const struct gl_pixelstore_attrib *unpacking;
		68
		69	const GLvoid *srcImage;
		70	GLvoid *dstImage;
		71
		72	GLint index;
		73	};
		74
		75	typedef GLboolean (convert_func)( const struct convert_info convert );
		76
		77	/* bitvalues for convert->index */
		78	#define CONVERT_STRIDE_BIT 0x1
		79	#define CONVERT_UNPACKING_BIT 0x2
		80
		81
		82
		83	/* =============================================================
		84	* Convert to RGBA8888 textures:
		85	*/
		86
		87	#define DST_TYPE GLuint
		88	#define DST_TEXELS_PER_DWORD 1
		89
		90	#define CONVERT_TEXEL( dst, src ) \
		91	dst = PACK_COLOR_8888_LE( src[3], src[2], src[1], src[0] )
		92
		93	#define CONVERT_DIRECT
		94
		95	#define SRC_TEXEL_BYTES 4
		96
		97	#define TAG(x) x##_rgba8888_direct
		98	#define PRESERVE_DST_TYPE
		99	#include "texutil_tmp.h"
		100
		101
		102	#define CONVERT_TEXEL( dst, src ) \
		103	dst = PACK_COLOR_8888_LE( src[0], src[1], src[2], src[3] )
		104
		105	#define CONVERT_TEXEL_DWORD( dst, src ) CONVERT_TEXEL( dst, src )
		106
		107	#define SRC_TEXEL_BYTES 4
		108
		109	#define TAG(x) x##_abgr8888_to_rgba8888
		110	#define PRESERVE_DST_TYPE
		111	#include "texutil_tmp.h"
		112
		113
		114	#define CONVERT_TEXEL( dst, src ) \
		115	dst = PACK_COLOR_8888_LE( src[0], src[1], src[2], 0xff )
		116
		117	#define CONVERT_TEXEL_DWORD( dst, src ) CONVERT_TEXEL( dst, src )
		118
		119	#define SRC_TEXEL_BYTES 3
		120
		121	#define TAG(x) x##_bgr888_to_rgba8888
		122	#include "texutil_tmp.h"
		123
		124
		125	#define CONVERT_RGBA8888( name ) \
		126	static GLboolean \
		127	convert_##name##_rgba8888( const struct convert_info *convert ) \
		128	{ \
		129	convert_func *tab; \
		130	GLint index = convert->index; \
		131	\
		132	if ( convert->format == GL_ABGR_EXT && \
		133	convert->type == GL_UNSIGNED_INT_8_8_8_8_REV ) \
		134	{ \
		135	tab = name##_tab_rgba8888_direct; \
		136	} \
		137	else if ( convert->format == GL_RGBA && \
		138	( convert->type == GL_UNSIGNED_BYTE \|\| \
		139	convert->type == GL_UNSIGNED_INT_8_8_8_8 ) ) \
		140	{ \
		141	tab = name##_tab_abgr8888_to_rgba8888; \
		142	} \
		143	else if ( convert->format == GL_RGB && \
		144	convert->type == GL_UNSIGNED_BYTE ) \
		145	{ \
		146	tab = name##_tab_bgr888_to_rgba8888; \
		147	} \
		148	else \
		149	{ \
		150	/* Can't handle this source format/type combination */ \
		151	return GL_FALSE; \
		152	} \
		153	\
		154	return tab[index]( convert ); \
		155	}
		156
		157	CONVERT_RGBA8888( texsubimage2d )
		158	CONVERT_RGBA8888( texsubimage3d )
		159
		160
		161
		162	/* =============================================================
		163	* Convert to ARGB8888 textures:
		164	*/
		165
		166	#define DST_TYPE GLuint
		167	#define DST_TEXELS_PER_DWORD 1
		168
		169	#define CONVERT_TEXEL( dst, src ) \
		170	dst = PACK_COLOR_8888_LE( src[3], src[2], src[1], src[0] )
		171
		172	#define CONVERT_DIRECT
		173
		174	#define SRC_TEXEL_BYTES 4
		175
		176	#define TAG(x) x##_argb8888_direct
		177	#define PRESERVE_DST_TYPE
		178	#include "texutil_tmp.h"
		179
		180
		181	#define CONVERT_TEXEL( dst, src ) \
		182	dst = PACK_COLOR_8888_LE( src[3], src[0], src[1], src[2] )
		183
		184	#define CONVERT_TEXEL_DWORD( dst, src ) CONVERT_TEXEL( dst, src )
		185
		186	#define SRC_TEXEL_BYTES 4
		187
		188	#define TAG(x) x##_abgr8888_to_argb8888
		189	#define PRESERVE_DST_TYPE
		190	#include "texutil_tmp.h"
		191
		192
		193	#define CONVERT_TEXEL( dst, src ) \
		194	dst = PACK_COLOR_8888_LE( 0xff, src[0], src[1], src[2] )
		195
		196	#define CONVERT_TEXEL_DWORD( dst, src ) CONVERT_TEXEL( dst, src )
		197
		198	#define SRC_TEXEL_BYTES 3
		199
		200	#define TAG(x) x##_bgr888_to_argb8888
		201	#include "texutil_tmp.h"
		202
		203
		204	#define CONVERT_ARGB8888( name ) \
		205	static GLboolean \
		206	convert_##name##_argb8888( const struct convert_info *convert ) \
		207	{ \
		208	convert_func *tab; \
		209	GLint index = convert->index; \
		210	\
		211	if ( convert->format == GL_BGRA && \
		212	convert->type == GL_UNSIGNED_INT_8_8_8_8_REV ) \
		213	{ \
		214	tab = name##_tab_argb8888_direct; \
		215	} \
		216	else if ( convert->format == GL_RGBA && \
		217	convert->type == GL_UNSIGNED_BYTE ) \
		218	{ \
		219	tab = name##_tab_abgr8888_to_argb8888; \
		220	} \
		221	else if ( convert->format == GL_RGB && \
		222	convert->type == GL_UNSIGNED_BYTE ) \
		223	{ \
		224	tab = name##_tab_bgr888_to_argb8888; \
		225	} \
		226	else \
		227	{ \
		228	/* Can't handle this source format/type combination */ \
		229	return GL_FALSE; \
		230	} \
		231	\
		232	return tab[index]( convert ); \
		233	}
		234
		235	CONVERT_ARGB8888( texsubimage2d )
		236	CONVERT_ARGB8888( texsubimage3d )
		237
		238
		239
		240	/* =============================================================
		241	* Convert to RGB888 textures:
		242	*/
		243
		244	static GLboolean
		245	convert_texsubimage2d_rgb888( const struct convert_info *convert )
		246	{
		247	/* This is a placeholder for now...
		248	*/
		249	return GL_FALSE;
		250	}
		251
		252	static GLboolean
		253	convert_texsubimage3d_rgb888( const struct convert_info *convert )
		254	{
		255	/* This is a placeholder for now...
		256	*/
		257	return GL_FALSE;
		258	}
		259
		260
		261
		262	/* =============================================================
		263	* Convert to RGB565 textures:
		264	*/
		265
		266	#define DST_TYPE GLushort
		267	#define DST_TEXELS_PER_DWORD 2
		268
		269	#define CONVERT_TEXEL( dst, src ) \
		270	dst = PACK_COLOR_565_LE( src[0], src[1], src[2] )
		271
		272	#define CONVERT_DIRECT
		273
		274	#define SRC_TEXEL_BYTES 2
		275
		276	#define TAG(x) x##_rgb565_direct
		277	#define PRESERVE_DST_TYPE
		278	#include "texutil_tmp.h"
		279
		280
		281	#define CONVERT_TEXEL( dst, src ) \
		282	dst = PACK_COLOR_565_LE( src[0], src[1], src[2] )
		283
		284	#define CONVERT_TEXEL_DWORD( dst, src ) \
		285	dst = APPEND16( PACK_COLOR_565_LE( src[0], src[1], src[2] ), \
		286	PACK_COLOR_565_LE( src[3], src[4], src[5] ) )
		287
		288	#define SRC_TEXEL_BYTES 3
		289
		290	#define TAG(x) x##_bgr888_to_rgb565
		291	#define PRESERVE_DST_TYPE
		292	#include "texutil_tmp.h"
		293
		294
		295	#define CONVERT_TEXEL( dst, src ) \
		296	dst = PACK_COLOR_565_LE( src[0], src[1], src[2] )
		297
		298	#define CONVERT_TEXEL_DWORD( dst, src ) \
		299	dst = APPEND16( PACK_COLOR_565_LE( src[0], src[1], src[2] ), \
		300	PACK_COLOR_565_LE( src[4], src[5], src[6] ) )
		301
		302	#define SRC_TEXEL_BYTES 4
		303
		304	#define TAG(x) x##_abgr8888_to_rgb565
		305	#include "texutil_tmp.h"
		306
		307
		308	#define CONVERT_RGB565( name ) \
		309	static GLboolean \
		310	convert_##name##_rgb565( const struct convert_info *convert ) \
		311	{ \
		312	convert_func *tab; \
		313	GLint index = convert->index; \
		314	\
		315	if ( convert->format == GL_RGB && \
		316	convert->type == GL_UNSIGNED_SHORT_5_6_5 ) \
		317	{ \
		318	tab = name##_tab_rgb565_direct; \
		319	} \
		320	else if ( convert->format == GL_RGB && \
		321	convert->type == GL_UNSIGNED_BYTE ) \
		322	{ \
		323	tab = name##_tab_bgr888_to_rgb565; \
		324	} \
		325	else if ( convert->format == GL_RGBA && \
		326	convert->type == GL_UNSIGNED_BYTE ) \
		327	{ \
		328	tab = name##_tab_abgr8888_to_rgb565; \
		329	} \
		330	else \
		331	{ \
		332	/* Can't handle this source format/type combination */ \
		333	return GL_FALSE; \
		334	} \
		335	\
		336	return tab[index]( convert ); \
		337	}
		338
		339	CONVERT_RGB565( texsubimage2d )
		340	CONVERT_RGB565( texsubimage3d )
		341
		342
		343
		344	/* =============================================================
		345	* Convert to ARGB4444 textures:
		346	*/
		347
		348	#define DST_TYPE GLushort
		349	#define DST_TEXELS_PER_DWORD 2
		350
		351	#define CONVERT_TEXEL( dst, src ) \
		352	dst = PACK_COLOR_4444_LE( src[3], src[0], src[1], src[2] )
		353
		354	#define CONVERT_DIRECT
		355
		356	#define SRC_TEXEL_BYTES 2
		357
		358	#define TAG(x) x##_argb4444_direct
		359	#define PRESERVE_DST_TYPE
		360	#include "texutil_tmp.h"
		361
		362
		363	#define CONVERT_TEXEL( dst, src ) \
		364	dst = PACK_COLOR_4444_LE( src[3], src[0], src[1], src[2] )
		365
		366	#define CONVERT_TEXEL_DWORD( dst, src ) \
		367	dst = APPEND16( PACK_COLOR_4444_LE( src[3], src[0], src[1], src[2] ), \
		368	PACK_COLOR_4444_LE( src[7], src[4], src[5], src[6] ) )
		369
		370	#define SRC_TEXEL_BYTES 4
		371
		372	#define TAG(x) x##_abgr8888_to_argb4444
		373	#include "texutil_tmp.h"
		374
		375
		376	#define CONVERT_ARGB4444( name ) \
		377	static GLboolean \
		378	convert_##name##_argb4444( const struct convert_info *convert ) \
		379	{ \
		380	convert_func *tab; \
		381	GLint index = convert->index; \
		382	\
		383	if ( convert->format == GL_BGRA && \
		384	convert->type == GL_UNSIGNED_SHORT_4_4_4_4_REV ) \
		385	{ \
		386	tab = name##_tab_argb4444_direct; \
		387	} \
		388	else if ( convert->format == GL_RGBA && \
		389	convert->type == GL_UNSIGNED_BYTE ) \
		390	{ \
		391	tab = name##_tab_abgr8888_to_argb4444; \
		392	} \
		393	else \
		394	{ \
		395	/* Can't handle this source format/type combination */ \
		396	return GL_FALSE; \
		397	} \
		398	\
		399	return tab[index]( convert ); \
		400	}
		401
		402	CONVERT_ARGB4444( texsubimage2d )
		403	CONVERT_ARGB4444( texsubimage3d )
		404
		405
		406
		407	/* =============================================================
		408	* Convert to ARGB1555 textures:
		409	*/
		410
		411	#define DST_TYPE GLushort
		412	#define DST_TEXELS_PER_DWORD 2
		413
		414	#define CONVERT_TEXEL( dst, src ) \
		415	dst = PACK_COLOR_1555_LE( src[3], src[0], src[1], src[2] )
		416
		417	#define CONVERT_DIRECT
		418
		419	#define SRC_TEXEL_BYTES 2
		420
		421	#define TAG(x) x##_argb1555_direct
		422	#define PRESERVE_DST_TYPE
		423	#include "texutil_tmp.h"
		424
		425
		426	#ifdef MESA_BIG_ENDIAN
		427
		428	#define CONVERT_TEXEL( dst, src ) \
		429	{ const GLushort s = (GLushort )src; \
		430	dst = (s >> 9) \| ((s & 0x1ff) << 7); }
		431
		432	#define CONVERT_TEXEL_DWORD( dst, src ) \
		433	{ const GLuint s = ((fi_type *)src)->i; \
		434	dst = (((s & 0xfe00fe00) >> 9) \| \
		435	((s & 0x01ff01ff) << 7)); }
		436
		437	#else
		438
		439	#define CONVERT_TEXEL( dst, src ) \
		440	{ const GLushort s = (GLushort )src; \
		441	dst = (s >> 1) \| ((s & 1) << 15); }
		442
		443	#define CONVERT_TEXEL_DWORD( dst, src ) \
		444	{ const GLuint s = ((fi_type *)src)->i; \
		445	dst = (((s & 0xfffefffe) >> 1) \| \
		446	((s & 0x00010001) << 15)); }
		447
		448	#endif
		449
		450	#define SRC_TEXEL_BYTES 2
		451
		452	#define TAG(x) x##_rgba5551_to_argb1555
		453	#define PRESERVE_DST_TYPE
		454	#include "texutil_tmp.h"
		455
		456
		457	#define CONVERT_TEXEL( dst, src ) \
		458	dst = PACK_COLOR_1555_LE( src[3], src[0], src[1], src[2] )
		459
		460	#define CONVERT_TEXEL_DWORD( dst, src ) \
		461	dst = APPEND16( PACK_COLOR_1555_LE( src[3], src[0], src[1], src[2] ), \
		462	PACK_COLOR_1555_LE( src[7], src[4], src[5], src[6] ) )
		463
		464	#define SRC_TEXEL_BYTES 4
		465
		466	#define TAG(x) x##_abgr8888_to_argb1555
		467	#include "texutil_tmp.h"
		468
		469
		470	#define CONVERT_ARGB1555( name ) \
		471	static GLboolean \
		472	convert_##name##_argb1555( const struct convert_info *convert ) \
		473	{ \
		474	convert_func *tab; \
		475	GLint index = convert->index; \
		476	\
		477	if ( convert->format == GL_BGRA && \
		478	convert->type == GL_UNSIGNED_SHORT_1_5_5_5_REV ) \
		479	{ \
		480	tab = name##_tab_argb1555_direct; \
		481	} \
		482	else if ( convert->format == GL_RGBA && \
		483	convert->type == GL_UNSIGNED_SHORT_5_5_5_1 ) \
		484	{ \
		485	tab = name##_tab_rgba5551_to_argb1555; \
		486	} \
		487	else if ( convert->format == GL_RGBA && \
		488	convert->type == GL_UNSIGNED_BYTE ) \
		489	{ \
		490	tab = name##_tab_abgr8888_to_argb1555; \
		491	} \
		492	else \
		493	{ \
		494	/* Can't handle this source format/type combination */ \
		495	return GL_FALSE; \
		496	} \
		497	\
		498	return tab[index]( convert ); \
		499	}
		500
		501	CONVERT_ARGB1555( texsubimage2d )
		502	CONVERT_ARGB1555( texsubimage3d )
		503
		504
		505
		506	/* =============================================================
		507	* AL88 textures:
		508	*/
		509
		510	#define DST_TYPE GLushort
		511	#define DST_TEXELS_PER_DWORD 2
		512
		513	#define CONVERT_TEXEL( dst, src ) \
		514	dst = PACK_COLOR_88_LE( src[0], src[1] )
		515
		516	#define CONVERT_DIRECT
		517
		518	#define SRC_TEXEL_BYTES 2
		519
		520	#define TAG(x) x##_al88_direct
		521	#define PRESERVE_DST_TYPE
		522	#include "texutil_tmp.h"
		523
		524
		525	#define CONVERT_TEXEL( dst, src ) \
		526	dst = PACK_COLOR_88_LE( src[0], 0x00 )
		527
		528	#define CONVERT_TEXEL_DWORD( dst, src ) \
		529	dst = APPEND16( PACK_COLOR_88_LE( src[0], 0x00 ), \
		530	PACK_COLOR_88_LE( src[1], 0x00 ) )
		531
		532	#define SRC_TEXEL_BYTES 1
		533
		534	#define TAG(x) x##_a8_to_al88
		535	#define PRESERVE_DST_TYPE
		536	#include "texutil_tmp.h"
		537
		538
		539	#define CONVERT_TEXEL( dst, src ) \
		540	dst = PACK_COLOR_88_LE( 0xff, src[0] )
		541
		542	#define CONVERT_TEXEL_DWORD( dst, src ) \
		543	dst = APPEND16( PACK_COLOR_88_LE( 0xff, src[0] ), \
		544	PACK_COLOR_88_LE( 0xff, src[1] ) )
		545
		546	#define SRC_TEXEL_BYTES 1
		547
		548	#define TAG(x) x##_l8_to_al88
		549	#define PRESERVE_DST_TYPE
		550	#include "texutil_tmp.h"
		551
		552
		553	#define CONVERT_TEXEL( dst, src ) \
		554	dst = PACK_COLOR_88_LE( src[3], src[0] )
		555
		556	#define CONVERT_TEXEL_DWORD( dst, src ) \
		557	dst = APPEND16( PACK_COLOR_88_LE( src[3], src[0] ), \
		558	PACK_COLOR_88_LE( src[7], src[4] ) )
		559
		560	#define SRC_TEXEL_BYTES 4
		561
		562	#define TAG(x) x##_abgr8888_to_al88
		563	#include "texutil_tmp.h"
		564
		565
		566	#define CONVERT_AL88( name ) \
		567	static GLboolean \
		568	convert_##name##_al88( const struct convert_info *convert ) \
		569	{ \
		570	convert_func *tab; \
		571	GLint index = convert->index; \
		572	\
		573	if ( convert->format == GL_LUMINANCE_ALPHA && \
		574	convert->type == GL_UNSIGNED_BYTE ) \
		575	{ \
		576	tab = name##_tab_al88_direct; \
		577	} \
		578	else if ( convert->format == GL_ALPHA && \
		579	convert->type == GL_UNSIGNED_BYTE ) \
		580	{ \
		581	tab = name##_tab_a8_to_al88; \
		582	} \
		583	else if ( convert->format == GL_LUMINANCE && \
		584	convert->type == GL_UNSIGNED_BYTE ) \
		585	{ \
		586	tab = name##_tab_l8_to_al88; \
		587	} \
		588	else if ( convert->format == GL_RGBA && \
		589	convert->type == GL_UNSIGNED_BYTE ) \
		590	{ \
		591	tab = name##_tab_abgr8888_to_al88; \
		592	} \
		593	else \
		594	{ \
		595	/* Can't handle this source format/type combination */ \
		596	return GL_FALSE; \
		597	} \
		598	\
		599	return tab[index]( convert ); \
		600	}
		601
		602	CONVERT_AL88( texsubimage2d )
		603	CONVERT_AL88( texsubimage3d )
		604
		605
		606
		607	/* =============================================================
		608	* Convert to RGB332 textures:
		609	*/
		610
		611	static GLboolean
		612	convert_texsubimage2d_rgb332( const struct convert_info *convert )
		613	{
		614	/* This is a placeholder for now...
		615	*/
		616	return GL_FALSE;
		617	}
		618
		619	static GLboolean
		620	convert_texsubimage3d_rgb332( const struct convert_info *convert )
		621	{
		622	/* This is a placeholder for now...
		623	*/
		624	return GL_FALSE;
		625	}
		626
		627
		628
		629	/* =============================================================
		630	* CI8 (and all other single-byte texel) textures:
		631	*/
		632
		633	#define DST_TYPE GLubyte
		634	#define DST_TEXELS_PER_DWORD 4
		635
		636	#define CONVERT_TEXEL( dst, src ) dst = src[0]
		637
		638	#define CONVERT_DIRECT
		639
		640	#define SRC_TEXEL_BYTES 1
		641
		642	#define TAG(x) x##_ci8_direct
		643	#include "texutil_tmp.h"
		644
		645
		646	#define CONVERT_CI8( name ) \
		647	static GLboolean \
		648	convert_##name##_ci8( const struct convert_info *convert ) \
		649	{ \
		650	convert_func *tab; \
		651	GLint index = convert->index; \
		652	\
		653	if ( ( convert->format == GL_ALPHA \|\| \
		654	convert->format == GL_LUMINANCE \|\| \
		655	convert->format == GL_INTENSITY \|\| \
		656	convert->format == GL_COLOR_INDEX ) && \
		657	convert->type == GL_UNSIGNED_BYTE ) \
		658	{ \
		659	tab = name##_tab_ci8_direct; \
		660	} \
		661	else \
		662	{ \
		663	/* Can't handle this source format/type combination */ \
		664	return GL_FALSE; \
		665	} \
		666	\
		667	return tab[index]( convert ); \
		668	}
		669
		670	CONVERT_CI8( texsubimage2d )
		671	CONVERT_CI8( texsubimage3d )
		672
		673
		674	/* =============================================================
		675	* convert to YCBCR textures:
		676	*/
		677
		678	#define DST_TYPE GLushort
		679	#define DST_TEXELS_PER_DWORD 2
		680
		681	#define CONVERT_TEXEL( dst, src ) \
		682	dst = (src[0] << 8) \| src[1];
		683
		684	#define CONVERT_DIRECT
		685
		686	#define SRC_TEXEL_BYTES 2
		687
		688	#define TAG(x) x##_ycbcr_direct
		689	#include "texutil_tmp.h"
		690
		691
		692	#define CONVERT_YCBCR( name ) \
		693	static GLboolean \
		694	convert_##name##_ycbcr( const struct convert_info *convert ) \
		695	{ \
		696	convert_func *tab; \
		697	GLint index = convert->index; \
		698	\
		699	if (convert->format != GL_YCBCR_MESA) { \
		700	/* Can't handle this source format/type combination */ \
		701	return GL_FALSE; \
		702	} \
		703	tab = name##_tab_ycbcr_direct; \
		704	\
		705	return tab[index]( convert ); \
		706	}
		707
		708	CONVERT_YCBCR( texsubimage2d )
		709	CONVERT_YCBCR( texsubimage3d )
		710
		711
		712	/* =============================================================
		713	* convert to YCBCR_REV textures:
		714	*/
		715
		716	#define DST_TYPE GLushort
		717	#define DST_TEXELS_PER_DWORD 2
		718
		719	#define CONVERT_TEXEL( dst, src ) \
		720	dst = (src[1] << 8) \| src[0];
		721
		722	#define CONVERT_DIRECT
		723
		724	#define SRC_TEXEL_BYTES 2
		725
		726	#define TAG(x) x##_ycbcr_rev_direct
		727	#include "texutil_tmp.h"
		728
		729
		730	#define CONVERT_YCBCR_REV( name ) \
		731	static GLboolean \
		732	convert_##name##_ycbcr_rev( const struct convert_info *convert ) \
		733	{ \
		734	convert_func *tab; \
		735	GLint index = convert->index; \
		736	\
		737	if (convert->format != GL_YCBCR_MESA) { \
		738	/* Can't handle this source format/type combination */ \
		739	return GL_FALSE; \
		740	} \
		741	tab = name##_tab_ycbcr_rev_direct; \
		742	\
		743	return tab[index]( convert ); \
		744	}
		745
		746	CONVERT_YCBCR_REV( texsubimage2d )
		747	CONVERT_YCBCR_REV( texsubimage3d )
		748
		749
		750
		751	/* =============================================================
		752	* Global entry points
		753	*/
		754
		755	static convert_func convert_texsubimage2d_tab[] = {
		756	convert_texsubimage2d_rgba8888,
		757	convert_texsubimage2d_argb8888,
		758	convert_texsubimage2d_rgb888,
		759	convert_texsubimage2d_rgb565,
		760	convert_texsubimage2d_argb4444,
		761	convert_texsubimage2d_argb1555,
		762	convert_texsubimage2d_al88,
		763	convert_texsubimage2d_rgb332,
		764	convert_texsubimage2d_ci8, /* These are all the same... */
		765	convert_texsubimage2d_ci8,
		766	convert_texsubimage2d_ci8,
		767	convert_texsubimage2d_ci8,
		768	convert_texsubimage2d_ycbcr,
		769	convert_texsubimage2d_ycbcr_rev,
		770	};
		771
		772	static convert_func convert_texsubimage3d_tab[] = {
		773	convert_texsubimage3d_rgba8888,
		774	convert_texsubimage3d_argb8888,
		775	convert_texsubimage3d_rgb888,
		776	convert_texsubimage3d_rgb565,
		777	convert_texsubimage3d_argb4444,
		778	convert_texsubimage3d_argb1555,
		779	convert_texsubimage3d_al88,
		780	convert_texsubimage3d_rgb332,
		781	convert_texsubimage3d_ci8, /* These are all the same... */
		782	convert_texsubimage3d_ci8,
		783	convert_texsubimage3d_ci8,
		784	convert_texsubimage3d_ci8,
		785	convert_texsubimage3d_ycbcr,
		786	convert_texsubimage3d_ycbcr_rev,
		787	};
		788
		789
		790	/* See if we need to care about the pixel store attributes when we're
		791	* converting the texture image. This should be stored as
		792	* unpacking->_SomeBoolean and updated when the values change, to avoid
		793	* testing every time...
		794	*/
		795	static INLINE GLboolean
		796	convert_needs_unpacking( const struct gl_pixelstore_attrib *unpacking,
		797	GLenum format, GLenum type )
		798	{
		799	if ( ( unpacking->Alignment == 1 \|\|
		800	( unpacking->Alignment == 4 && /* Pick up the common Q3A case... */
		801	format == GL_RGBA && type == GL_UNSIGNED_BYTE ) ) &&
		802	unpacking->RowLength == 0 &&
		803	unpacking->SkipPixels == 0 &&
		804	unpacking->SkipRows == 0 &&
		805	unpacking->ImageHeight == 0 &&
		806	unpacking->SkipImages == 0 &&
		807	unpacking->SwapBytes == GL_FALSE &&
		808	unpacking->LsbFirst == GL_FALSE ) {
		809	return GL_FALSE;
		810	} else {
		811	return GL_TRUE;
		812	}
		813	}
		814
		815
		816	GLboolean
		817	_mesa_convert_texsubimage1d( GLint mesaFormat,
		818	GLint xoffset,
		819	GLint width,
		820	GLenum format, GLenum type,
		821	const struct gl_pixelstore_attrib *unpacking,
		822	const GLvoid srcImage, GLvoid dstImage )
		823	{
		824	struct convert_info convert;
		825
		826	ASSERT( unpacking );
		827	ASSERT( srcImage );
		828	ASSERT( dstImage );
		829
		830	ASSERT( mesaFormat >= MESA_FORMAT_RGBA8888 );
		831	ASSERT( mesaFormat <= MESA_FORMAT_YCBCR_REV );
		832
		833	/* Make it easier to pass all the parameters around.
		834	*/
		835	convert.xoffset = xoffset;
		836	convert.yoffset = 0;
		837	convert.width = width;
		838	convert.height = 1;
		839	convert.format = format;
		840	convert.type = type;
		841	convert.unpacking = unpacking;
		842	convert.srcImage = srcImage;
		843	convert.dstImage = dstImage;
		844
		845	convert.index = 0;
		846
		847	if ( convert_needs_unpacking( unpacking, format, type ) )
		848	convert.index \|= CONVERT_UNPACKING_BIT;
		849
		850	ASSERT(convert.index < 4);
		851
		852	return convert_texsubimage2d_tab[mesaFormat]( &convert );
		853	}
		854
		855
		856	/* Convert a user's 2D image into a texture image. This basically
		857	* repacks pixel data into the special texture formats used by core Mesa
		858	* and the DRI drivers. This function can do full images or subimages.
		859	*
		860	* We return a boolean because this function may not accept some kinds
		861	* of source image formats and/or types. For example, if the incoming
		862	* format/type = GL_BGR, GL_UNSIGNED_INT this function probably won't
		863	* be able to do the conversion.
		864	*
		865	* In that case, the incoming image should first be simplified to one of
		866	* the "canonical" formats (GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA,
		867	* GL_INTENSITY, GL_RGB, GL_RGBA) and types (GL_CHAN). We can do that
		868	* with the _mesa_transfer_teximage() function. That function will also
		869	* do image transfer operations such as scale/bias and convolution.
		870	*
		871	* Input:
		872	* mesaFormat - one of the MESA_FORMAT_* values from texformat.h
		873	* xoffset, yoffset - position in dest image to put data
		874	* width, height - incoming image size, also size of dest region.
		875	* dstImageWidth - width (row stride) of dest image in pixels
		876	* format, type - incoming image format and type
		877	* unpacking - describes incoming image unpacking
		878	* srcImage - pointer to source image
		879	* destImage - pointer to dest image
		880	*/
		881	GLboolean
		882	_mesa_convert_texsubimage2d( GLint mesaFormat, /* dest */
		883	GLint xoffset, GLint yoffset,
		884	GLint width, GLint height,
		885	GLint destImageWidth,
		886	GLenum format, GLenum type, /* source */
		887	const struct gl_pixelstore_attrib *unpacking,
		888	const GLvoid srcImage, GLvoid dstImage )
		889	{
		890	struct convert_info convert;
		891
		892	ASSERT( unpacking );
		893	ASSERT( srcImage );
		894	ASSERT( dstImage );
		895
		896	ASSERT( mesaFormat >= MESA_FORMAT_RGBA8888 );
		897	ASSERT( mesaFormat <= MESA_FORMAT_YCBCR_REV );
		898
		899	/* Make it easier to pass all the parameters around.
		900	*/
		901	convert.xoffset = xoffset;
		902	convert.yoffset = yoffset;
		903	convert.width = width;
		904	convert.height = height;
		905	convert.dstImageWidth = destImageWidth;
		906	convert.format = format;
		907	convert.type = type;
		908	convert.unpacking = unpacking;
		909	convert.srcImage = srcImage;
		910	convert.dstImage = dstImage;
		911
		912	convert.index = 0;
		913
		914	if ( convert_needs_unpacking( unpacking, format, type ) )
		915	convert.index \|= CONVERT_UNPACKING_BIT;
		916
		917	if ( width != destImageWidth )
		918	convert.index \|= CONVERT_STRIDE_BIT;
		919
		920	return convert_texsubimage2d_tab[mesaFormat]( &convert );
		921	}
		922
		923	GLboolean
		924	_mesa_convert_texsubimage3d( GLint mesaFormat, /* dest */
		925	GLint xoffset, GLint yoffset, GLint zoffset,
		926	GLint width, GLint height, GLint depth,
		927	GLint dstImageWidth, GLint dstImageHeight,
		928	GLenum format, GLenum type, /* source */
		929	const struct gl_pixelstore_attrib *unpacking,
		930	const GLvoid srcImage, GLvoid dstImage )
		931	{
		932	struct convert_info convert;
		933
		934	ASSERT( unpacking );
		935	ASSERT( srcImage );
		936	ASSERT( dstImage );
		937
		938	ASSERT( mesaFormat >= MESA_FORMAT_RGBA8888 );
		939	ASSERT( mesaFormat <= MESA_FORMAT_YCBCR_REV );
		940
		941	/* Make it easier to pass all the parameters around.
		942	*/
		943	convert.xoffset = xoffset;
		944	convert.yoffset = yoffset;
		945	convert.zoffset = zoffset;
		946	convert.width = width;
		947	convert.height = height;
		948	convert.depth = depth;
		949	convert.dstImageWidth = dstImageWidth;
		950	convert.dstImageHeight = dstImageHeight;
		951	convert.format = format;
		952	convert.type = type;
		953	convert.unpacking = unpacking;
		954	convert.srcImage = srcImage;
		955	convert.dstImage = dstImage;
		956
		957	convert.index = 0;
		958
		959	if ( convert_needs_unpacking( unpacking, format, type ) )
		960	convert.index \|= CONVERT_UNPACKING_BIT;
		961
		962	if ( width != dstImageWidth \|\| height != dstImageHeight )
		963	convert.index \|= CONVERT_STRIDE_BIT;
		964
		965	return convert_texsubimage3d_tab[mesaFormat]( &convert );
		966	}
		967
		968
		969
		970	/* Nearest filtering only (for broken hardware that can't support
		971	* all aspect ratios). This can be made a lot faster, but I don't
		972	* really care enough...
		973	*/
		974	void _mesa_rescale_teximage2d( GLuint bytesPerPixel, GLuint dstRowStride,
		975	GLint srcWidth, GLint srcHeight,
		976	GLint dstWidth, GLint dstHeight,
		977	const GLvoid srcImage, GLvoid dstImage )
		978	{
		979	GLint row, col;
		980
		981	#define INNER_LOOP( TYPE, HOP, WOP ) \
		982	for ( row = 0 ; row < dstHeight ; row++ ) { \
		983	GLint srcRow = row HOP hScale; \
		984	for ( col = 0 ; col < dstWidth ; col++ ) { \
		985	GLint srcCol = col WOP wScale; \
		986	dst[col] = src[srcRow * srcWidth + srcCol]; \
		987	} \
		988	dst = (TYPE ) ((GLubyte ) dst + dstRowStride); \
		989	} \
		990
		991	#define RESCALE_IMAGE( TYPE ) \
		992	do { \
		993	const TYPE src = (const TYPE )srcImage; \
		994	TYPE dst = (TYPE )dstImage; \
		995	\
		996	if ( srcHeight <= dstHeight ) { \
		997	const GLint hScale = dstHeight / srcHeight; \
		998	if ( srcWidth <= dstWidth ) { \
		999	const GLint wScale = dstWidth / srcWidth; \
		1000	INNER_LOOP( TYPE, /, / ); \
		1001	} \
		1002	else { \
		1003	const GLint wScale = srcWidth / dstWidth; \
		1004	INNER_LOOP( TYPE, /, * ); \
		1005	} \
		1006	} \
		1007	else { \
		1008	const GLint hScale = srcHeight / dstHeight; \
		1009	if ( srcWidth <= dstWidth ) { \
		1010	const GLint wScale = dstWidth / srcWidth; \
		1011	INNER_LOOP( TYPE, *, / ); \
		1012	} \
		1013	else { \
		1014	const GLint wScale = srcWidth / dstWidth; \
		1015	INNER_LOOP( TYPE, , ); \
		1016	} \
		1017	} \
		1018	} while (0)
		1019
		1020	switch ( bytesPerPixel ) {
		1021	case 4:
		1022	RESCALE_IMAGE( GLuint );
		1023	break;
		1024
		1025	case 2:
		1026	RESCALE_IMAGE( GLushort );
		1027	break;
		1028
		1029	case 1:
		1030	RESCALE_IMAGE( GLubyte );
		1031	break;
		1032	default:
		1033	_mesa_problem(NULL,"unexpected bytes/pixel in _mesa_rescale_teximage2d");
		1034	}
		1035	}

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(root)/shark/branches/xen/ports/mesa/src/texutil.c - Rev 1618