Tile Compression

ui/gl/gl_image_memory.h

 // 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.
 
 #ifndef UI_GL_GL_IMAGE_MEMORY_H_
 #define UI_GL_GL_IMAGE_MEMORY_H_
 
 #include "ui/gl/gl_image.h"
 
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
     defined(USE_OZONE)
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 #endif
 
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gfx {
 
 class GL_EXPORT GLImageMemory : public GLImage {
  public:
   GLImageMemory(const gfx::Size& size, unsigned internalformat);
 
-  static size_t BytesPerPixel(gfx::GpuMemoryBuffer::Format format);
+  static size_t BitsPerPixel(gfx::GpuMemoryBuffer::Format format);
 
   bool Initialize(const unsigned char* memory,
                   gfx::GpuMemoryBuffer::Format format);
 
   // Overridden from GLImage:
   void Destroy(bool have_context) override;
   gfx::Size GetSize() override;
   bool BindTexImage(unsigned target) override;
   void ReleaseTexImage(unsigned target) override {}
   bool CopyTexImage(unsigned target) override;
   void WillUseTexImage() override;
   void DidUseTexImage() override;
   void WillModifyTexImage() override {}
   void DidModifyTexImage() override {}
   bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                             int z_order,
                             OverlayTransform transform,
                             const Rect& bounds_rect,
                             const RectF& crop_rect) override;
 
  protected:
   ~GLImageMemory() override;
 
  private:
   void DoBindTexImage(unsigned target);
+  size_t MemoryBytes(gfx::GpuMemoryBuffer::Format format);
 
   const gfx::Size size_;
   const unsigned internalformat_;
   const unsigned char* memory_;
   gfx::GpuMemoryBuffer::Format format_;
   bool in_use_;
   unsigned target_;
   bool need_do_bind_tex_image_;
 #if defined(OS_WIN) || defined(USE_X11) || defined(OS_ANDROID) || \
     defined(USE_OZONE)
   unsigned egl_texture_id_;
   EGLImageKHR egl_image_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(GLImageMemory);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_IMAGE_MEMORY_H_