Implement WEBGL_compressed_texture_s3tc_srgb

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 12091 matching lines @@
 
 bool GLES2DecoderImpl::GetCompressedTexSizeInBytes(
     const char* function_name, GLsizei width, GLsizei height, GLsizei depth,
     GLenum format, GLsizei* size_in_bytes) {
   base::CheckedNumeric<GLsizei> bytes_required(0);
 
   switch (format) {
     case GL_ATC_RGB_AMD:
     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
     case GL_ETC1_RGB8_OES:
       bytes_required =
           (width + kS3TCBlockWidth - 1) / kS3TCBlockWidth;
       bytes_required *=
           (height + kS3TCBlockHeight - 1) / kS3TCBlockHeight;
       bytes_required *= kS3TCDXT1BlockSize;
       break;
     case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
     case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
     case GL_COMPRESSED_RGBA_ASTC_5x5_KHR:
@@ skipping 34 matching lines @@
       bytes_required *=
           (height + kBlockHeight - 1) / kBlockHeight;
 
       bytes_required *= kASTCBlockSize;
       break;
     }
     case GL_ATC_RGBA_EXPLICIT_ALPHA_AMD:
     case GL_ATC_RGBA_INTERPOLATED_ALPHA_AMD:
     case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
       bytes_required =
           (width + kS3TCBlockWidth - 1) / kS3TCBlockWidth;
       bytes_required *=
           (height + kS3TCBlockHeight - 1) / kS3TCBlockHeight;
       bytes_required *= kS3TCDXT3AndDXT5BlockSize;
       break;
     case GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
     case GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
       bytes_required = std::max(width, 8);
       bytes_required *= std::max(height, 8);
@@ skipping 91 matching lines @@
 }
 
 bool GLES2DecoderImpl::ValidateCompressedTexDimensions(
     const char* function_name, GLenum target, GLint level,
     GLsizei width, GLsizei height, GLsizei depth, GLenum format) {
   switch (format) {
     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
       DCHECK_EQ(1, depth);  // 2D formats.
       if (!IsValidDXTSize(level, width) || !IsValidDXTSize(level, height)) {
         LOCAL_SET_GL_ERROR(
             GL_INVALID_OPERATION, function_name,
             "width or height invalid for level");
         return false;
       }
       return true;
     case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
     case GL_COMPRESSED_RGBA_ASTC_5x4_KHR:
@@ skipping 86 matching lines @@
   if (xoffset < 0 || yoffset < 0 || zoffset < 0) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_VALUE, function_name, "x/y/z offset < 0");
     return false;
   }
 
   switch (format) {
     case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
     case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT: {
+    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: {
       const int kBlockWidth = 4;
       const int kBlockHeight = 4;
       if ((xoffset % kBlockWidth) || (yoffset % kBlockHeight)) {
         LOCAL_SET_GL_ERROR(
             GL_INVALID_OPERATION, function_name,
             "xoffset or yoffset not multiple of 4");
         return false;
       }
       GLsizei tex_width = 0;
       GLsizei tex_height = 0;
@@ skipping 5576 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu