dom/canvas/WebGLExtensionCompressedTextureRGTC.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 WebGLExtensionCompressedTextureRGTC::WebGLExtensionCompressedTextureRGTC(
  15     WebGLContext* const webgl)
  16     : WebGLExtensionBase(webgl) {
  17   MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
  18
  19   auto& fua = webgl->mFormatUsage;
  20
  21   const auto fnAdd = [&](const GLenum sizedFormat,
  22                          const webgl::EffectiveFormat effFormat) {
  23     auto usage = fua->EditUsage(effFormat);
  24     usage->isFilterable = true;
  25     fua->AllowSizedTexFormat(sizedFormat, usage);
  26   };
  27
  28 #define _(X) LOCAL_GL_##X, webgl::EffectiveFormat::X
  29
  30   fnAdd(_(COMPRESSED_RED_RGTC1));
  31   fnAdd(_(COMPRESSED_SIGNED_RED_RGTC1));
  32   fnAdd(_(COMPRESSED_RG_RGTC2));
  33   fnAdd(_(COMPRESSED_SIGNED_RG_RGTC2));
  34
  35 #undef _
  36 }
  37
  38 bool WebGLExtensionCompressedTextureRGTC::IsSupported(
  39     const WebGLContext* const webgl) {
  40   return webgl->gl->IsSupported(gl::GLFeature::texture_compression_rgtc);
  41 }
  42
  43 }  // namespace mozilla