dom/canvas/WebGLExtensionCompressedTextureS3TC.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "WebGLExtensions.h"
   6
   7 #include "GLContext.h"
   8 #include "mozilla/dom/WebGLRenderingContextBinding.h"
   9 #include "WebGLContext.h"
  10 #include "WebGLFormats.h"
  11
  12 namespace mozilla {
  13
  14 WebGLExtensionCompressedTextureS3TC::WebGLExtensionCompressedTextureS3TC(
  15     WebGLContext* webgl)
  16     : WebGLExtensionBase(webgl) {
  17   RefPtr<WebGLContext> webgl_ = webgl;  // Bug 1201275
  18   const auto fnAdd = [&webgl_](GLenum sizedFormat,
  19                                webgl::EffectiveFormat effFormat) {
  20     auto& fua = webgl_->mFormatUsage;
  21
  22     auto usage = fua->EditUsage(effFormat);
  23     usage->isFilterable = true;
  24     fua->AllowSizedTexFormat(sizedFormat, usage);
  25   };
  26
  27 #define FOO(x) LOCAL_GL_##x, webgl::EffectiveFormat::x
  28
  29   fnAdd(FOO(COMPRESSED_RGB_S3TC_DXT1_EXT));
  30   fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT1_EXT));
  31   fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT3_EXT));
  32   fnAdd(FOO(COMPRESSED_RGBA_S3TC_DXT5_EXT));
  33
  34 #undef FOO
  35 }
  36
  37 bool WebGLExtensionCompressedTextureS3TC::IsSupported(
  38     const WebGLContext* webgl) {
  39   gl::GLContext* gl = webgl->GL();
  40   if (gl->IsExtensionSupported(gl::GLContext::EXT_texture_compression_s3tc))
  41     return true;
  42
  43   return gl->IsExtensionSupported(
  44              gl::GLContext::EXT_texture_compression_dxt1) &&
  45          gl->IsExtensionSupported(
  46              gl::GLContext::ANGLE_texture_compression_dxt3) &&
  47          gl->IsExtensionSupported(
  48              gl::GLContext::ANGLE_texture_compression_dxt5);
  49 }
  50
  51 }  // namespace mozilla