Update GPU memory buffers to use StrideInBytes internally.

gpu/command_buffer/tests/gl_manager.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 "gpu/command_buffer/tests/gl_manager.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gl2extchromium.h>
 
@@ skipping 19 matching lines @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/gl_image_ref_counted_memory.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gl_surface.h"
 
 namespace gpu {
 namespace {
 
-size_t BytesPerPixel(gfx::GpuMemoryBuffer::Format format) {
+size_t BitsPerPixel(gfx::GpuMemoryBuffer::Format format) {
   switch (format) {
     case gfx::GpuMemoryBuffer::RGBA_8888:
     case gfx::GpuMemoryBuffer::BGRA_8888:
-      return 4;
+      return 32;
     case gfx::GpuMemoryBuffer::RGBX_8888:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
+size_t PixelsToBytes(size_t pixel_count, gfx::GpuMemoryBuffer::Format format) {
+  size_t size_in_bits = pixel_count * BitsPerPixel(format);
+  DCHECK_EQ(size_in_bits % 8, 0u);
+  return size_in_bits / 8;
+}
+
 class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
  public:
   GpuMemoryBufferImpl(base::RefCountedBytes* bytes,
                       const gfx::Size& size,
                       gfx::GpuMemoryBuffer::Format format)
       : bytes_(bytes), size_(size), format_(format), mapped_(false) {}
 
   static GpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer) {
     return reinterpret_cast<GpuMemoryBufferImpl*>(buffer);
   }
 
   // Overridden from gfx::GpuMemoryBuffer:
   void* Map() override {
     mapped_ = true;
     return &bytes_->data().front();
   }
   void Unmap() override { mapped_ = false; }
   bool IsMapped() const override { return mapped_; }
   Format GetFormat() const override { return format_; }
   uint32 GetStride() const override {
-    return size_.width() * BytesPerPixel(format_);
+    return PixelsToBytes(size_.width(), format_);
   }
   gfx::GpuMemoryBufferHandle GetHandle() const override {
     NOTREACHED();
     return gfx::GpuMemoryBufferHandle();
   }
   ClientBuffer AsClientBuffer() override {
     return reinterpret_cast<ClientBuffer>(this);
   }
 
   base::RefCountedBytes* bytes() { return bytes_.get(); }
@@ skipping 41 matching lines @@
       delete base_context_;
       base_context_ = NULL;
     }
   }
 }
 
 // static
 scoped_ptr<gfx::GpuMemoryBuffer> GLManager::CreateGpuMemoryBuffer(
     const gfx::Size& size,
     gfx::GpuMemoryBuffer::Format format) {
-  std::vector<unsigned char> data(size.GetArea() * BytesPerPixel(format), 0);
+  std::vector<unsigned char> data(PixelsToBytes(size.GetArea(), format), 0);
   scoped_refptr<base::RefCountedBytes> bytes(new base::RefCountedBytes(data));
   return make_scoped_ptr<gfx::GpuMemoryBuffer>(
       new GpuMemoryBufferImpl(bytes.get(), size, format));
 }
 
 void GLManager::Initialize(const GLManager::Options& options) {
   InitializeWithCommandLine(options, nullptr);
 }
 void GLManager::InitializeWithCommandLine(const GLManager::Options& options,
                                           base::CommandLine* command_line) {
@@ skipping 273 matching lines @@
 void GLManager::SetSurfaceVisible(bool visible) {
   NOTIMPLEMENTED();
 }
 
 uint32 GLManager::CreateStreamTexture(uint32 texture_id) {
   NOTIMPLEMENTED();
   return 0;
 }
 
 }  // namespace gpu