ozone: Implement zero/one-copy texture for Ozone GBM.

ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.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/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.h"
 
 #include "base/logging.h"
 #include "ui/gl/gl_image_egl.h"
 #include "ui/gl/gl_image_linux_dma_buffer.h"
 #include "ui/ozone/public/native_pixmap.h"
@@ skipping 54 matching lines @@
       return false;
     pixmap_ = pixmap;
     return true;
   }
 
   bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                             int z_order,
                             gfx::OverlayTransform transform,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override {
+    DCHECK(pixmap_->GetBufferUsage() == NativePixmap::SCANOUT);

[reveman, 2015/05/11 16:40:57]

nit: use DCHECK_EQ

[dshwang, 2015/05/14 12:25:47]

Done.

     return SurfaceFactoryOzone::GetInstance()->ScheduleOverlayPlane(
         widget, z_order, transform, pixmap_, bounds_rect, crop_rect);
   }
 
  protected:
   ~GLImageOzoneNativePixmapDmaBuf() override {}
 
  private:
   scoped_refptr<NativePixmap> pixmap_;
 };
@@ skipping 47 matching lines @@
 GpuMemoryBufferFactoryOzoneNativeBuffer::
     ~GpuMemoryBufferFactoryOzoneNativeBuffer() {
 }
 
 bool GpuMemoryBufferFactoryOzoneNativeBuffer::CreateGpuMemoryBuffer(
     gfx::GpuMemoryBufferId id,
     const gfx::Size& size,
     gfx::GpuMemoryBuffer::Format format,
     gfx::GpuMemoryBuffer::Usage usage,
     int client_id,
-    gfx::PluginWindowHandle surface_handle) {
+    gfx::PluginWindowHandle surface_handle,
+    gfx::GpuMemoryBufferHandle* new_handle) {
   scoped_refptr<NativePixmap> pixmap =
       SurfaceFactoryOzone::GetInstance()->CreateNativePixmap(
           surface_handle, size, GetOzoneFormatFor(format),
-          GetOzoneUsageFor(usage));
+          GetOzoneUsageFor(usage), new_handle);
   if (!pixmap.get()) {
     LOG(ERROR) << "Failed to create pixmap " << size.width() << "x"
                << size.height() << " format " << format << ", usage " << usage;
     return false;
   }
   base::AutoLock lock(native_pixmap_map_lock_);
   native_pixmap_map_[GetIndex(id, client_id)] = pixmap;
   return true;
 }
 
@@ skipping 43 matching lines @@
         new GLImageOzoneNativePixmapDmaBuf(size, internalformat);
     if (!image->Initialize(pixmap.get(), format)) {
       return scoped_refptr<gfx::GLImage>();
     }
     return image;
   }
   return scoped_refptr<gfx::GLImage>();
 }
 
 }  // namespace ui