Allow putting NV12 software GMBs into overlays on windows

ui/gl/gl_image_memory.cc

 // Copyright 2014 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 "ui/gl/gl_image_memory.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
@@ skipping 345 matching lines @@
 
 GLImageMemory::GLImageMemory(const gfx::Size& size, unsigned internalformat)
     : size_(size),
       internalformat_(internalformat),
       memory_(nullptr),
       format_(gfx::BufferFormat::RGBA_8888),
       stride_(0) {}
 
 GLImageMemory::~GLImageMemory() {}
 
+// static
+GLImageMemory* GLImageMemory::FromGLImage(GLImage* image) {
+  if (!image || image->GetType() != Type::MEMORY)
+    return nullptr;
+  return static_cast<GLImageMemory*>(image);
+}
+
 bool GLImageMemory::Initialize(const unsigned char* memory,
                                gfx::BufferFormat format,
                                size_t stride) {
   if (!ValidInternalFormat(internalformat_)) {
     LOG(ERROR) << "Invalid internalformat: " << internalformat_;
     return false;
   }
 
   if (!ValidFormat(format)) {
     LOG(ERROR) << "Invalid format: " << static_cast<int>(format);
@@ skipping 116 matching lines @@
 }
 
 bool GLImageMemory::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                          int z_order,
                                          gfx::OverlayTransform transform,
                                          const gfx::Rect& bounds_rect,
                                          const gfx::RectF& crop_rect) {
   return false;
 }
 
+GLImageMemory::Type GLImageMemory::GetType() const {
+  return Type::MEMORY;
+}
+
 // static
 unsigned GLImageMemory::GetInternalFormatForTesting(gfx::BufferFormat format) {
   DCHECK(ValidFormat(format));
   return TextureFormat(format);
 }
 
 }  // namespace gl