content/canvas/src/WebGLExtensionSRGB.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "WebGLContext.h"
   7 #include "WebGLExtensions.h"
   8 #include "mozilla/dom/WebGLRenderingContextBinding.h"
   9 #include "GLContext.h"
  10
  11 using namespace mozilla;
  12
  13 WebGLExtensionSRGB::WebGLExtensionSRGB(WebGLContext* context)
  14     : WebGLExtensionBase(context)
  15 {
  16     MOZ_ASSERT(IsSupported(context), "should not construct WebGLExtensionSRGB: "
  17                                      "sRGB is unsupported.");
  18     gl::GLContext* gl = context->GL();
  19     if (!gl->IsGLES()) {
  20         // Desktop OpenGL requires the following to be enabled to support
  21         // sRGB operations on framebuffers
  22         gl->MakeCurrent();
  23         gl->fEnable(LOCAL_GL_FRAMEBUFFER_SRGB_EXT);
  24     }
  25 }
  26
  27 WebGLExtensionSRGB::~WebGLExtensionSRGB()
  28 {
  29 }
  30
  31 bool
  32 WebGLExtensionSRGB::IsSupported(const WebGLContext* context)
  33 {
  34     gl::GLContext* gl = context->GL();
  35
  36     return gl->IsSupported(gl::GLFeature::sRGB);
  37 }
  38
  39
  40 IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionSRGB)