cc/resources/ui_resource_bitmap.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 "cc/resources/ui_resource_bitmap.h"

#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "cc/resources/etc1_pixel_ref.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkPixelRef.h"

namespace cc {

void UIResourceBitmap::Create(const skia::RefPtr<SkPixelRef>& pixel_ref,
                              UIResourceFormat format,
                              gfx::Size size) {
  DCHECK(size.width());
  DCHECK(size.height());
  DCHECK(pixel_ref);
  DCHECK(pixel_ref->isImmutable());
  format_ = format;
  size_ = size;
  pixel_ref_ = pixel_ref;

  // Default values for secondary parameters.
  wrap_mode_ = CLAMP_TO_EDGE;
  opaque_ = (format == ETC1);
}

UIResourceBitmap::UIResourceBitmap(const SkBitmap& skbitmap) {
  DCHECK_EQ(skbitmap.config(), SkBitmap::kARGB_8888_Config);
  DCHECK_EQ(skbitmap.width(), skbitmap.rowBytesAsPixels());
  DCHECK(skbitmap.isImmutable());

  skia::RefPtr<SkPixelRef> pixel_ref = skia::SharePtr(skbitmap.pixelRef());
  Create(pixel_ref,
         UIResourceBitmap::RGBA8,
         gfx::Size(skbitmap.width(), skbitmap.height()));

  SetOpaque(skbitmap.isOpaque());
}

UIResourceBitmap::UIResourceBitmap(
    const skia::RefPtr<ETC1PixelRef>& etc1_pixel_ref,
    gfx::Size size) {
  Create(etc1_pixel_ref, ETC1, size);
}

UIResourceBitmap::~UIResourceBitmap() {}

AutoLockUIResourceBitmap::AutoLockUIResourceBitmap(
    const UIResourceBitmap& bitmap) : bitmap_(bitmap) {
  bitmap_.pixel_ref_->lockPixels();
}

AutoLockUIResourceBitmap::~AutoLockUIResourceBitmap() {
  bitmap_.pixel_ref_->unlockPixels();
}

const uint8_t* AutoLockUIResourceBitmap::GetPixels() const {
  return static_cast<const uint8_t*>(bitmap_.pixel_ref_->pixels());
}

}  // namespace cc