WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/ports/mesa/src/swrast/s

Rev	Author	Line No.	Line
57	pj	1	/* $Id: s_texstore.c,v 1.1 2003-02-28 11:49:43 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	/*
		28	* Authors:
		29	* Brian Paul
		30	*/
		31
		32
		33	/*
		34	* The functions in this file are mostly related to software texture fallbacks.
		35	* This includes texture image transfer/packing and texel fetching.
		36	* Hardware drivers will likely override most of this.
		37	*/
		38
		39
		40
		41	#include "colormac.h"
		42	#include "context.h"
		43	#include "convolve.h"
		44	#include "image.h"
		45	#include "imports.h"
		46	#include "macros.h"
		47	#include "texformat.h"
		48	#include "teximage.h"
		49	#include "texstore.h"
		50
		51	#include "s_context.h"
		52	#include "s_depth.h"
		53	#include "s_span.h"
		54
		55	/*
		56	* Read an RGBA image from the frame buffer.
		57	* This is used by glCopyTex[Sub]Image[12]D().
		58	* Input: ctx - the context
		59	* x, y - lower left corner
		60	* width, height - size of region to read
		61	* Return: pointer to block of GL_RGBA, GLchan data.
		62	*/
		63	static GLchan *
		64	read_color_image( GLcontext *ctx, GLint x, GLint y,
		65	GLsizei width, GLsizei height )
		66	{
		67	SWcontext *swrast = SWRAST_CONTEXT(ctx);
		68	GLint stride, i;
		69	GLchan image, dst;
		70
		71	image = (GLchan ) MALLOC(width height * 4 * sizeof(GLchan));
		72	if (!image)
		73	return NULL;
		74
		75	/* Select buffer to read from */
		76	_swrast_use_read_buffer(ctx);
		77
		78	RENDER_START(swrast,ctx);
		79
		80	dst = image;
		81	stride = width * 4;
		82	for (i = 0; i < height; i++) {
		83	_mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
		84	(GLchan (*)[4]) dst );
		85	dst += stride;
		86	}
		87
		88	RENDER_FINISH(swrast,ctx);
		89
		90	/* Read from draw buffer (the default) */
		91	_swrast_use_draw_buffer(ctx);
		92
		93	return image;
		94	}
		95
		96
		97	/*
		98	* As above, but read data from depth buffer.
		99	*/
		100	static GLfloat *
		101	read_depth_image( GLcontext *ctx, GLint x, GLint y,
		102	GLsizei width, GLsizei height )
		103	{
		104	SWcontext *swrast = SWRAST_CONTEXT(ctx);
		105	GLfloat image, dst;
		106	GLint i;
		107
		108	image = (GLfloat ) MALLOC(width height * sizeof(GLfloat));
		109	if (!image)
		110	return NULL;
		111
		112	RENDER_START(swrast,ctx);
		113
		114	dst = image;
		115	for (i = 0; i < height; i++) {
		116	_mesa_read_depth_span_float(ctx, width, x, y + i, dst);
		117	dst += width;
		118	}
		119
		120	RENDER_FINISH(swrast,ctx);
		121
		122	return image;
		123	}
		124
		125
		126
		127	static GLboolean
		128	is_depth_format(GLenum format)
		129	{
		130	switch (format) {
		131	case GL_DEPTH_COMPONENT:
		132	case GL_DEPTH_COMPONENT16_SGIX:
		133	case GL_DEPTH_COMPONENT24_SGIX:
		134	case GL_DEPTH_COMPONENT32_SGIX:
		135	return GL_TRUE;
		136	default:
		137	return GL_FALSE;
		138	}
		139	}
		140
		141
		142	/*
		143	* Fallback for Driver.CopyTexImage1D().
		144	*/
		145	void
		146	_swrast_copy_teximage1d( GLcontext *ctx, GLenum target, GLint level,
		147	GLenum internalFormat,
		148	GLint x, GLint y, GLsizei width, GLint border )
		149	{
		150	struct gl_texture_unit *texUnit;
		151	struct gl_texture_object *texObj;
		152	struct gl_texture_image *texImage;
		153
		154	texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
		155	texObj = _mesa_select_tex_object(ctx, texUnit, target);
		156	ASSERT(texObj);
		157	texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
		158	ASSERT(texImage);
		159
		160	ASSERT(ctx->Driver.TexImage1D);
		161
		162	if (is_depth_format(internalFormat)) {
		163	/* read depth image from framebuffer */
		164	GLfloat *image = read_depth_image(ctx, x, y, width, 1);
		165	if (!image) {
		166	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
		167	return;
		168	}
		169
		170	/* call glTexImage1D to redefine the texture */
		171	(*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
		172	width, border,
		173	GL_DEPTH_COMPONENT, GL_FLOAT, image,
		174	&_mesa_native_packing, texObj, texImage);
		175	FREE(image);
		176	}
		177	else {
		178	/* read RGBA image from framebuffer */
		179	GLchan *image = read_color_image(ctx, x, y, width, 1);
		180	if (!image) {
		181	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage1D");
		182	return;
		183	}
		184
		185	/* call glTexImage1D to redefine the texture */
		186	(*ctx->Driver.TexImage1D)(ctx, target, level, internalFormat,
		187	width, border,
		188	GL_RGBA, CHAN_TYPE, image,
		189	&_mesa_native_packing, texObj, texImage);
		190	FREE(image);
		191	}
		192
		193	/* GL_SGIS_generate_mipmap */
		194	if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
		195	_mesa_generate_mipmap(ctx, target, texUnit, texObj);
		196	}
		197	}
		198
		199
		200	/*
		201	* Fallback for Driver.CopyTexImage2D().
		202	*/
		203	void
		204	_swrast_copy_teximage2d( GLcontext *ctx, GLenum target, GLint level,
		205	GLenum internalFormat,
		206	GLint x, GLint y, GLsizei width, GLsizei height,
		207	GLint border )
		208	{
		209	struct gl_texture_unit *texUnit;
		210	struct gl_texture_object *texObj;
		211	struct gl_texture_image *texImage;
		212
		213	texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
		214	texObj = _mesa_select_tex_object(ctx, texUnit, target);
		215	ASSERT(texObj);
		216	texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
		217	ASSERT(texImage);
		218
		219	ASSERT(ctx->Driver.TexImage2D);
		220
		221	if (is_depth_format(internalFormat)) {
		222	/* read depth image from framebuffer */
		223	GLfloat *image = read_depth_image(ctx, x, y, width, height);
		224	if (!image) {
		225	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
		226	return;
		227	}
		228
		229	/* call glTexImage2D to redefine the texture */
		230	(*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
		231	width, height, border,
		232	GL_DEPTH_COMPONENT, GL_FLOAT, image,
		233	&_mesa_native_packing, texObj, texImage);
		234	FREE(image);
		235	}
		236	else {
		237	/* read RGBA image from framebuffer */
		238	GLchan *image = read_color_image(ctx, x, y, width, height);
		239	if (!image) {
		240	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexImage2D");
		241	return;
		242	}
		243
		244	/* call glTexImage2D to redefine the texture */
		245	(*ctx->Driver.TexImage2D)(ctx, target, level, internalFormat,
		246	width, height, border,
		247	GL_RGBA, CHAN_TYPE, image,
		248	&_mesa_native_packing, texObj, texImage);
		249	FREE(image);
		250	}
		251
		252	/* GL_SGIS_generate_mipmap */
		253	if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
		254	_mesa_generate_mipmap(ctx, target, texUnit, texObj);
		255	}
		256	}
		257
		258
		259	/*
		260	* Fallback for Driver.CopyTexSubImage1D().
		261	*/
		262	void
		263	_swrast_copy_texsubimage1d( GLcontext *ctx, GLenum target, GLint level,
		264	GLint xoffset, GLint x, GLint y, GLsizei width )
		265	{
		266	struct gl_texture_unit *texUnit;
		267	struct gl_texture_object *texObj;
		268	struct gl_texture_image *texImage;
		269
		270	texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
		271	texObj = _mesa_select_tex_object(ctx, texUnit, target);
		272	ASSERT(texObj);
		273	texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
		274	ASSERT(texImage);
		275
		276	ASSERT(ctx->Driver.TexImage1D);
		277
		278	if (texImage->Format == GL_DEPTH_COMPONENT) {
		279	/* read depth image from framebuffer */
		280	GLfloat *image = read_depth_image(ctx, x, y, width, 1);
		281	if (!image) {
		282	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D");
		283	return;
		284	}
		285
		286	/* call glTexSubImage1D to redefine the texture */
		287	(*ctx->Driver.TexSubImage1D)(ctx, target, level, xoffset, width,
		288	GL_DEPTH_COMPONENT, GL_FLOAT, image,
		289	&_mesa_native_packing, texObj, texImage);
		290	FREE(image);
		291	}
		292	else {
		293	/* read RGBA image from framebuffer */
		294	GLchan *image = read_color_image(ctx, x, y, width, 1);
		295	if (!image) {
		296	_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage1D" );
		297	return;
		298	}
		299
		300	/* now call glTexSubImage1D to do the real work */
		301	(*ctx->Driver.TexSubImage1D)(ctx, target, level, xoffset, width,
		302	GL_RGBA, CHAN_TYPE, image,
		303	&_mesa_native_packing, texObj, texImage);
		304	FREE(image);
		305	}
		306
		307	/* GL_SGIS_generate_mipmap */
		308	if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
		309	_mesa_generate_mipmap(ctx, target, texUnit, texObj);
		310	}
		311	}
		312
		313
		314	/*
		315	* Fallback for Driver.CopyTexSubImage2D().
		316	*/
		317	void
		318	_swrast_copy_texsubimage2d( GLcontext *ctx,
		319	GLenum target, GLint level,
		320	GLint xoffset, GLint yoffset,
		321	GLint x, GLint y, GLsizei width, GLsizei height )
		322	{
		323	struct gl_texture_unit *texUnit;
		324	struct gl_texture_object *texObj;
		325	struct gl_texture_image *texImage;
		326
		327	texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
		328	texObj = _mesa_select_tex_object(ctx, texUnit, target);
		329	ASSERT(texObj);
		330	texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
		331	ASSERT(texImage);
		332
		333	ASSERT(ctx->Driver.TexImage2D);
		334
		335	if (texImage->Format == GL_DEPTH_COMPONENT) {
		336	/* read depth image from framebuffer */
		337	GLfloat *image = read_depth_image(ctx, x, y, width, height);
		338	if (!image) {
		339	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D");
		340	return;
		341	}
		342
		343	/* call glTexImage1D to redefine the texture */
		344	(*ctx->Driver.TexSubImage2D)(ctx, target, level,
		345	xoffset, yoffset, width, height,
		346	GL_DEPTH_COMPONENT, GL_FLOAT, image,
		347	&_mesa_native_packing, texObj, texImage);
		348	FREE(image);
		349	}
		350	else {
		351	/* read RGBA image from framebuffer */
		352	GLchan *image = read_color_image(ctx, x, y, width, height);
		353	if (!image) {
		354	_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage2D" );
		355	return;
		356	}
		357
		358	/* now call glTexSubImage2D to do the real work */
		359	(*ctx->Driver.TexSubImage2D)(ctx, target, level,
		360	xoffset, yoffset, width, height,
		361	GL_RGBA, CHAN_TYPE, image,
		362	&_mesa_native_packing, texObj, texImage);
		363	FREE(image);
		364	}
		365
		366	/* GL_SGIS_generate_mipmap */
		367	if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
		368	_mesa_generate_mipmap(ctx, target, texUnit, texObj);
		369	}
		370	}
		371
		372
		373	/*
		374	* Fallback for Driver.CopyTexSubImage3D().
		375	*/
		376	void
		377	_swrast_copy_texsubimage3d( GLcontext *ctx,
		378	GLenum target, GLint level,
		379	GLint xoffset, GLint yoffset, GLint zoffset,
		380	GLint x, GLint y, GLsizei width, GLsizei height )
		381	{
		382	struct gl_texture_unit *texUnit;
		383	struct gl_texture_object *texObj;
		384	struct gl_texture_image *texImage;
		385
		386	texUnit = &ctx->Texture.Unit[ctx->Texture.CurrentUnit];
		387	texObj = _mesa_select_tex_object(ctx, texUnit, target);
		388	ASSERT(texObj);
		389	texImage = _mesa_select_tex_image(ctx, texUnit, target, level);
		390	ASSERT(texImage);
		391
		392	ASSERT(ctx->Driver.TexImage3D);
		393
		394	if (texImage->Format == GL_DEPTH_COMPONENT) {
		395	/* read depth image from framebuffer */
		396	GLfloat *image = read_depth_image(ctx, x, y, width, height);
		397	if (!image) {
		398	_mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D");
		399	return;
		400	}
		401
		402	/* call glTexImage1D to redefine the texture */
		403	(*ctx->Driver.TexSubImage3D)(ctx, target, level,
		404	xoffset, yoffset, zoffset, width, height, 1,
		405	GL_DEPTH_COMPONENT, GL_FLOAT, image,
		406	&_mesa_native_packing, texObj, texImage);
		407	FREE(image);
		408	}
		409	else {
		410	/* read RGBA image from framebuffer */
		411	GLchan *image = read_color_image(ctx, x, y, width, height);
		412	if (!image) {
		413	_mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyTexSubImage3D" );
		414	return;
		415	}
		416
		417	/* now call glTexSubImage3D to do the real work */
		418	(*ctx->Driver.TexSubImage3D)(ctx, target, level,
		419	xoffset, yoffset, zoffset, width, height, 1,
		420	GL_RGBA, CHAN_TYPE, image,
		421	&_mesa_native_packing, texObj, texImage);
		422	FREE(image);
		423	}
		424
		425	/* GL_SGIS_generate_mipmap */
		426	if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
		427	_mesa_generate_mipmap(ctx, target, texUnit, texObj);
		428	}
		429	}

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