Add RGB565 Texture readback support in gl_helper

content/browser/renderer_host/render_widget_host_view_android.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_android.h"
 
 #include <android/bitmap.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 287 matching lines @@
       texture_id_in_layer_,
       texture_size_in_layer_,
       bitmap.size(),
       true,
       GLHelper::SCALER_QUALITY_FAST);
   if (texture == 0)
     return false;
 
   helper->ReadbackTextureSync(texture,
                               gfx::Rect(bitmap.size()),
-                              static_cast<unsigned char*> (bitmap.pixels()));
+                              static_cast<unsigned char*> (bitmap.pixels()),
+                              SkBitmap::kARGB_8888_Config);
 
   blink::WebGraphicsContext3D* context =
       ImageTransportFactoryAndroid::GetInstance()->GetContext3D();
   context->deleteTexture(texture);
 
   return true;
 }
 
 bool RenderWidgetHostViewAndroid::HasValidFrame() const {
   if (!content_view_core_)
@@ skipping 295 matching lines @@
 }
 
 void RenderWidgetHostViewAndroid::SetBackground(const SkBitmap& background) {
   RenderWidgetHostViewBase::SetBackground(background);
   host_->Send(new ViewMsg_SetBackground(host_->GetRoutingID(), background));
 }
 
 void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
-    const base::Callback<void(bool, const SkBitmap&)>& callback) {
+    const base::Callback<void(bool, const SkBitmap&)>& callback,
+    bool readback_config_rgb565) {
   if (!using_synchronous_compositor_ && !IsSurfaceAvailableForCopy()) {
     callback.Run(false, SkBitmap());
     return;
   }
-
+  ImageTransportFactoryAndroid* factory =
+      ImageTransportFactoryAndroid::GetInstance();
+  GLHelper* gl_helper = factory->GetGLHelper();
+  if (!gl_helper)
+    return;
+  bool check_rgb565_support = gl_helper->CanUseRgb565Readback();
+  if (readback_config_rgb565 && !check_rgb565_support) {
+    LOG(ERROR) << "Readbackformat rgb565  not supported";
+    callback.Run(false, SkBitmap());
+    return;
+  }
   const gfx::Display& display =
       gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
   float device_scale_factor = display.device_scale_factor();
 
   DCHECK_EQ(device_scale_factor,
             ui::GetImageScale(GetScaleFactorForView(this)));
 
   const gfx::Size& dst_size_in_pixel = ConvertViewSizeToPixel(this, dst_size);
   gfx::Rect src_subrect_in_pixel =
       ConvertRectToPixel(device_scale_factor, src_subrect);
 
   if (using_synchronous_compositor_) {
     SynchronousCopyContents(src_subrect_in_pixel, dst_size_in_pixel, callback);
     return;
   }
-
   scoped_ptr<cc::CopyOutputRequest> request;
   if (src_subrect_in_pixel.size() == dst_size_in_pixel) {
       request = cc::CopyOutputRequest::CreateBitmapRequest(base::Bind(
           &RenderWidgetHostViewAndroid::PrepareBitmapCopyOutputResult,
           dst_size_in_pixel,
           callback));
   } else {
       request = cc::CopyOutputRequest::CreateRequest(base::Bind(
           &RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult,
           dst_size_in_pixel,
+          readback_config_rgb565,
           callback));
   }
   request->set_area(src_subrect_in_pixel);
   layer_->RequestCopyOfOutput(request.Pass());
 }
 
 void RenderWidgetHostViewAndroid::CopyFromCompositingSurfaceToVideoFrame(
       const gfx::Rect& src_subrect,
       const scoped_refptr<media::VideoFrame>& target,
       const base::Callback<void(bool)>& callback) {
@@ skipping 683 matching lines @@
     texture_layer_->SetIsDrawable(false);
   if (delegated_renderer_layer_.get())
     DestroyDelegatedContent();
   texture_id_in_layer_ = 0;
   RunAckCallbacks();
 }
 
 // static
 void RenderWidgetHostViewAndroid::PrepareTextureCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
+    bool readback_config_rgb565,
     const base::Callback<void(bool, const SkBitmap&)>& callback,
     scoped_ptr<cc::CopyOutputResult> result) {
   DCHECK(result->HasTexture());
   base::ScopedClosureRunner scoped_callback_runner(
       base::Bind(callback, false, SkBitmap()));
 
   if (!result->HasTexture() || result->IsEmpty() || result->size().IsEmpty())
     return;
 
   scoped_ptr<SkBitmap> bitmap(new SkBitmap);
-  bitmap->setConfig(SkBitmap::kARGB_8888_Config,
-                    dst_size_in_pixel.width(), dst_size_in_pixel.height(),
+  SkBitmap::Config bitmap_config = readback_config_rgb565 ?
+                                   SkBitmap::kRGB_565_Config :
+                                   SkBitmap::kARGB_8888_Config;
+  bitmap->setConfig(bitmap_config,
+                    dst_size_in_pixel.width(),
+                    dst_size_in_pixel.height(),
                     0, kOpaque_SkAlphaType);
   if (!bitmap->allocPixels())
     return;
 
   ImageTransportFactoryAndroid* factory =
       ImageTransportFactoryAndroid::GetInstance();
   GLHelper* gl_helper = factory->GetGLHelper();
   if (!gl_helper)
     return;
 
@@ skipping 10 matching lines @@
 
   ignore_result(scoped_callback_runner.Release());
 
   gl_helper->CropScaleReadbackAndCleanMailbox(
       texture_mailbox.name(),
       texture_mailbox.sync_point(),
       result->size(),
       gfx::Rect(result->size()),
       dst_size_in_pixel,
       pixels,
+      readback_config_rgb565,
       base::Bind(&CopyFromCompositingSurfaceFinished,
                  callback,
                  base::Passed(&release_callback),
                  base::Passed(&bitmap),
                  base::Passed(&bitmap_pixels_lock)));
 }
 
 // static
 void RenderWidgetHostViewAndroid::PrepareBitmapCopyOutputResult(
     const gfx::Size& dst_size_in_pixel,
@@ skipping 37 matching lines @@
 // RenderWidgetHostView, public:
 
 // static
 RenderWidgetHostView*
 RenderWidgetHostView::CreateViewForWidget(RenderWidgetHost* widget) {
   RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(widget);
   return new RenderWidgetHostViewAndroid(rwhi, NULL);
 }
 
 } // namespace content