Remove FORMAT_RGB from gfx::PngCodec

media/gpu/rendering_helper.cc

 // Copyright 2013 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 "media/gpu/rendering_helper.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 692 matching lines @@
   task_runner_ = nullptr;
   gl_context_ = NULL;
   gl_surface_ = NULL;
 
   render_as_thumbnails_ = false;
   frame_count_ = 0;
   thumbnails_fbo_id_ = 0;
   thumbnails_texture_id_ = 0;
 }
 
-void RenderingHelper::GetThumbnailsAsRGB(std::vector<unsigned char>* rgb,
-                                         bool* alpha_solid,
-                                         base::WaitableEvent* done) {
+void RenderingHelper::GetThumbnailsAsRGBA(std::vector<unsigned char>* rgba,
+                                          base::WaitableEvent* done) {
   CHECK(render_as_thumbnails_);
 
   const size_t num_pixels = thumbnails_fbo_size_.GetArea();
-  std::vector<unsigned char> rgba;
-  rgba.resize(num_pixels * 4);
+  rgba->resize(num_pixels * 4);
   glBindFramebufferEXT(GL_FRAMEBUFFER, thumbnails_fbo_id_);
   glPixelStorei(GL_PACK_ALIGNMENT, 1);
   // We can only count on GL_RGBA/GL_UNSIGNED_BYTE support.
-  glReadPixels(0, 0,
-               thumbnails_fbo_size_.width(), thumbnails_fbo_size_.height(),
-               GL_RGBA,
-               GL_UNSIGNED_BYTE,
-               &rgba[0]);
+  glReadPixels(0, 0, thumbnails_fbo_size_.width(),
+               thumbnails_fbo_size_.height(), GL_RGBA, GL_UNSIGNED_BYTE,
+               &(*rgba)[0]);
   glBindFramebufferEXT(GL_FRAMEBUFFER,
                        gl_surface_->GetBackingFramebufferObject());
-  rgb->resize(num_pixels * 3);
-  // Drop the alpha channel, but check as we go that it is all 0xff.
-  bool solid = true;
-  unsigned char* rgb_ptr = &((*rgb)[0]);
-  unsigned char* rgba_ptr = &rgba[0];
-  for (size_t i = 0; i < num_pixels; ++i) {
-    *rgb_ptr++ = *rgba_ptr++;
-    *rgb_ptr++ = *rgba_ptr++;
-    *rgb_ptr++ = *rgba_ptr++;
-    solid = solid && (*rgba_ptr == 0xff);
-    rgba_ptr++;
-  }
-  *alpha_solid = solid;
 
   done->Signal();
 }
 
 void RenderingHelper::Flush(size_t window_id) {
   videos_[window_id].is_flushing = true;
 }
 
 void RenderingHelper::RenderContent() {
   CHECK(task_runner_->BelongsToCurrentThread());
@@ skipping 158 matching lines @@
   // When the rendering falls behind, drops frames.
   while (scheduled_render_time_ < target) {
     scheduled_render_time_ += frame_duration_;
     DropOneFrameForAllVideos();
   }
 
   task_runner_->PostDelayedTask(FROM_HERE, render_task_.callback(),
                                 target - now);
 }
 }  // namespace media