gpu: Add YCbCr 420v extension.

ui/gl/scoped_binders.cc

Index: ui/gl/scoped_binders.cc
diff --git a/ui/gl/scoped_binders.cc b/ui/gl/scoped_binders.cc
index bb2b290105622a9823b49b284d6bbd72aa6f36bc..0d6389a6b11c177e6d1704eb3c4a78b76e44757a 100644
--- a/ui/gl/scoped_binders.cc
+++ b/ui/gl/scoped_binders.cc
@@ -47,8 +47,11 @@ ScopedTextureBinder::ScopedTextureBinder(unsigned int target, unsigned int id)
       case GL_TEXTURE_EXTERNAL_OES:
         target_getter = GL_TEXTURE_BINDING_EXTERNAL_OES;
         break;
+      case GL_TEXTURE_RECTANGLE_ARB:
+        target_getter = GL_TEXTURE_BINDING_RECTANGLE_ARB;
+        break;
       default:
-        NOTIMPLEMENTED() << "Target not part of OpenGL ES 2.0 spec.";
+        NOTIMPLEMENTED() << " Target not supported.";
     }
     glGetIntegerv(target_getter, &old_id_);
   }
@@ -65,4 +68,43 @@ ScopedTextureBinder::~ScopedTextureBinder() {
   }
 }
 
+ScopedUseProgram::ScopedUseProgram(unsigned int program) : old_program_(-1) {
+  glGetIntegerv(GL_CURRENT_PROGRAM, &old_program_);
+  glUseProgram(program);
+}
+
+ScopedUseProgram::~ScopedUseProgram() {
+  glUseProgram(old_program_);
+}
+
+ScopedEnableVertexAttribArray::ScopedEnableVertexAttribArray(unsigned int index)
+    : enabled_(0), index_(index) {

[reveman, 2015/10/29 22:08:04]

s/0/GL_FALSE/

[Daniele Castagna, 2015/10/30 23:51:57]

Done.

+  glGetVertexAttribiv(index, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &enabled_);
+  glEnableVertexAttribArray(index);
+}
+
+ScopedEnableVertexAttribArray::~ScopedEnableVertexAttribArray() {
+  if (!enabled_) {

[reveman, 2015/10/29 22:08:04]

if (enabled_ == GL_FALSE)

[Daniele Castagna, 2015/10/30 23:51:57]

Done.

+    glDisableVertexAttribArray(index_);
+  }
+}
+
+ScopedBufferBinder::ScopedBufferBinder(unsigned int target, unsigned int id)
+    : target_(target), old_id_(-1) {
+  GLenum target_getter = 0;
+  switch (target) {
+    case GL_ARRAY_BUFFER:
+      target_getter = GL_ARRAY_BUFFER_BINDING;
+      break;
+    default:
+      NOTIMPLEMENTED() << " Target not supported.";
+  }
+  glGetIntegerv(target_getter, &old_id_);
+  glBindBuffer(target_, id);
+}
+
+ScopedBufferBinder::~ScopedBufferBinder() {
+  glBindBuffer(target_, old_id_);
+}
+
 }  // namespace gfx