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https://github.com/reactos/reactos.git
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371 lines
11 KiB
C
371 lines
11 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 2011 VMware, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file texstorage.c
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* GL_ARB_texture_storage functions
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*/
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#include <precomp.h>
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/**
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* Check if the given texture target is a legal texture object target
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* for a glTexStorage() command.
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* This is a bit different than legal_teximage_target() when it comes
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* to cube maps.
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*/
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static GLboolean
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legal_texobj_target(struct gl_context *ctx, GLuint dims, GLenum target)
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{
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switch (dims) {
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case 1:
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switch (target) {
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case GL_TEXTURE_1D:
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case GL_PROXY_TEXTURE_1D:
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return GL_TRUE;
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default:
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return GL_FALSE;
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}
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case 2:
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switch (target) {
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case GL_TEXTURE_2D:
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case GL_PROXY_TEXTURE_2D:
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return GL_TRUE;
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case GL_TEXTURE_CUBE_MAP:
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case GL_PROXY_TEXTURE_CUBE_MAP:
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return ctx->Extensions.ARB_texture_cube_map;
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default:
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return GL_FALSE;
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}
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default:
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_mesa_problem(ctx, "invalid dims=%u in legal_texobj_target()", dims);
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return GL_FALSE;
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}
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}
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/**
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* Compute the size of the next mipmap level.
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*/
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static void
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next_mipmap_level_size(GLenum target,
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GLint *width, GLint *height, GLint *depth)
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{
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if (*width > 1) {
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*width /= 2;
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}
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if (*height > 1) {
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*height /= 2;
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}
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if (*depth > 1) {
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*depth /= 2;
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}
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}
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/**
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* Do actual memory allocation for glTexStorage1/2/3D().
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*/
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static void
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setup_texstorage(struct gl_context *ctx,
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struct gl_texture_object *texObj,
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GLuint dims,
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GLsizei levels, GLenum internalFormat,
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GLsizei width, GLsizei height, GLsizei depth)
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{
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const GLenum target = texObj->Target;
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const GLuint numFaces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
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gl_format texFormat;
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GLint level, levelWidth = width, levelHeight = height, levelDepth = depth;
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GLuint face;
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assert(levels > 0);
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assert(width > 0);
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assert(height > 0);
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assert(depth > 0);
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texFormat = _mesa_choose_texture_format(ctx, texObj, target, 0,
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internalFormat, GL_NONE, GL_NONE);
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/* Set up all the texture object's gl_texture_images */
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for (level = 0; level < levels; level++) {
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for (face = 0; face < numFaces; face++) {
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const GLenum faceTarget =
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(target == GL_TEXTURE_CUBE_MAP)
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? GL_TEXTURE_CUBE_MAP_POSITIVE_X + face : target;
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struct gl_texture_image *texImage =
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_mesa_get_tex_image(ctx, texObj, faceTarget, level);
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if (!texImage) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage%uD", dims);
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return;
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}
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_mesa_init_teximage_fields(ctx, texImage,
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levelWidth, levelHeight, levelDepth,
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0, internalFormat, texFormat);
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}
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next_mipmap_level_size(target, &levelWidth, &levelHeight, &levelDepth);
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}
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assert(levelWidth > 0);
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assert(levelHeight > 0);
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assert(levelDepth > 0);
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if (!_mesa_is_proxy_texture(texObj->Target)) {
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/* Do actual texture memory allocation */
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if (!ctx->Driver.AllocTextureStorage(ctx, texObj, levels,
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width, height, depth)) {
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/* Reset the texture images' info to zeros.
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* Strictly speaking, we probably don't have to do this since
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* generating GL_OUT_OF_MEMORY can leave things in an undefined
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* state but this puts things in a consistent state.
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*/
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for (level = 0; level < levels; level++) {
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for (face = 0; face < numFaces; face++) {
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struct gl_texture_image *texImage = texObj->Image[face][level];
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if (texImage) {
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_mesa_init_teximage_fields(ctx, texImage,
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0, 0, 0, 0,
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GL_NONE, MESA_FORMAT_NONE);
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}
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}
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}
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage%uD", dims);
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return;
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}
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}
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texObj->Immutable = GL_TRUE;
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}
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/**
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* Clear all fields of texture object to zeros. Used for proxy texture tests.
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*/
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static void
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clear_image_fields(struct gl_context *ctx,
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GLuint dims,
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struct gl_texture_object *texObj)
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{
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const GLenum target = texObj->Target;
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const GLuint numFaces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
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GLint level;
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GLuint face;
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for (level = 0; level < Elements(texObj->Image[0]); level++) {
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for (face = 0; face < numFaces; face++) {
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const GLenum faceTarget =
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(target == GL_TEXTURE_CUBE_MAP)
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? GL_TEXTURE_CUBE_MAP_POSITIVE_X + face : target;
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struct gl_texture_image *texImage =
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_mesa_get_tex_image(ctx, texObj, faceTarget, level);
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if (!texImage) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexStorage%uD", dims);
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return;
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}
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_mesa_init_teximage_fields(ctx, texImage,
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0, 0, 0, 0, GL_NONE, MESA_FORMAT_NONE);
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}
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}
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}
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/**
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* Do error checking for calls to glTexStorage1/2/3D().
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* If an error is found, record it with _mesa_error(), unless the target
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* is a proxy texture.
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* \return GL_TRUE if any error, GL_FALSE otherwise.
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*/
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static GLboolean
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tex_storage_error_check(struct gl_context *ctx, GLuint dims, GLenum target,
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GLsizei levels, GLenum internalformat,
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GLsizei width, GLsizei height, GLsizei depth)
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{
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const GLboolean isProxy = _mesa_is_proxy_texture(target);
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struct gl_texture_object *texObj;
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GLuint maxDim;
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/* size check */
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if (width < 1 || height < 1 || depth < 1) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"glTexStorage%uD(width, height or depth < 1)", dims);
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}
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return GL_TRUE;
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}
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/* levels check */
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if (levels < 1 || height < 1 || depth < 1) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_VALUE, "glTexStorage%uD(levels < 1)",
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dims);
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}
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return GL_TRUE;
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}
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/* target check */
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if (!legal_texobj_target(ctx, dims, target)) {
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_mesa_error(ctx, GL_INVALID_ENUM,
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"glTexStorage%uD(illegal target=%s)",
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dims, _mesa_lookup_enum_by_nr(target));
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return GL_TRUE;
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}
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/* check levels against maximum */
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if (levels > _mesa_max_texture_levels(ctx, target)) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glTexStorage%uD(levels too large)", dims);
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}
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return GL_TRUE;
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}
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/* check levels against width/height/depth */
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maxDim = MAX3(width, height, depth);
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if (levels > _mesa_logbase2(maxDim) + 1) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glTexStorage%uD(too many levels for max texture dimension)",
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dims);
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}
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return GL_TRUE;
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}
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/* non-default texture object check */
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texObj = _mesa_select_tex_object(ctx, target);
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if (!texObj || (texObj->Name == 0 && !isProxy)) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glTexStorage%uD(texture object 0)", dims);
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}
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return GL_TRUE;
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}
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/* Check if texObj->Immutable is set */
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if (texObj->Immutable) {
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if (!isProxy) {
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_mesa_error(ctx, GL_INVALID_OPERATION, "glTexStorage%uD(immutable)",
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dims);
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}
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return GL_TRUE;
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}
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return GL_FALSE;
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}
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/**
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* Helper used by _mesa_TexStorage1/2/3D().
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*/
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static void
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texstorage(GLuint dims, GLenum target, GLsizei levels, GLenum internalformat,
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GLsizei width, GLsizei height, GLsizei depth)
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{
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struct gl_texture_object *texObj;
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GLboolean error;
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GET_CURRENT_CONTEXT(ctx);
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texObj = _mesa_select_tex_object(ctx, target);
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error = tex_storage_error_check(ctx, dims, target, levels,
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internalformat, width, height, depth);
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if (!error) {
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setup_texstorage(ctx, texObj, dims, levels, internalformat,
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width, height, depth);
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}
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else if (_mesa_is_proxy_texture(target)) {
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/* clear all image fields for [levels] */
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clear_image_fields(ctx, dims, texObj);
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}
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}
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void GLAPIENTRY
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_mesa_TexStorage1D(GLenum target, GLsizei levels, GLenum internalformat,
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GLsizei width)
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{
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texstorage(1, target, levels, internalformat, width, 1, 1);
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}
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void GLAPIENTRY
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_mesa_TexStorage2D(GLenum target, GLsizei levels, GLenum internalformat,
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GLsizei width, GLsizei height)
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{
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texstorage(2, target, levels, internalformat, width, height, 1);
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}
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void GLAPIENTRY
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_mesa_TexStorage3D(GLenum target, GLsizei levels, GLenum internalformat,
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GLsizei width, GLsizei height, GLsizei depth)
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{
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texstorage(3, target, levels, internalformat, width, height, depth);
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}
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/*
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* Note: we don't support GL_EXT_direct_state_access and the spec says
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* we don't need the following functions. However, glew checks for the
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* presence of all six functions and will say that GL_ARB_texture_storage
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* is not supported if these functions are missing.
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*/
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void GLAPIENTRY
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_mesa_TextureStorage1DEXT(GLuint texture, GLenum target, GLsizei levels,
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GLenum internalformat,
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GLsizei width)
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{
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/* no-op */
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}
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void GLAPIENTRY
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_mesa_TextureStorage2DEXT(GLuint texture, GLenum target, GLsizei levels,
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GLenum internalformat,
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GLsizei width, GLsizei height)
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{
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/* no-op */
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}
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void GLAPIENTRY
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_mesa_TextureStorage3DEXT(GLuint texture, GLenum target, GLsizei levels,
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GLenum internalformat,
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GLsizei width, GLsizei height, GLsizei depth)
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{
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/* no-op */
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}
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