src/cc/resources/ui_resource_bitmap.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/resources/ui_resource_bitmap.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "third_party/skia/include/core/SkBitmap.h"
  10 #include "third_party/skia/include/core/SkMallocPixelRef.h"
  11 #include "third_party/skia/include/core/SkPixelRef.h"
  12
  13 namespace cc {
  14
  15 void UIResourceBitmap::Create(const skia::RefPtr<SkPixelRef>& pixel_ref,
  16                               gfx::Size size,
  17                               UIResourceFormat format) {
  18   DCHECK(size.width());
  19   DCHECK(size.height());
  20   DCHECK(pixel_ref);
  21   DCHECK(pixel_ref->isImmutable());
  22   format_ = format;
  23   size_ = size;
  24   pixel_ref_ = pixel_ref;
  25
  26   // Default values for secondary parameters.
  27   wrap_mode_ = CLAMP_TO_EDGE;
  28   opaque_ = (format == ETC1);
  29 }
  30
  31 UIResourceBitmap::UIResourceBitmap(const SkBitmap& skbitmap) {
  32   DCHECK_EQ(skbitmap.config(), SkBitmap::kARGB_8888_Config);
  33   DCHECK_EQ(skbitmap.width(), skbitmap.rowBytesAsPixels());
  34   DCHECK(skbitmap.isImmutable());
  35
  36   skia::RefPtr<SkPixelRef> pixel_ref = skia::SharePtr(skbitmap.pixelRef());
  37   const SkImageInfo& info = pixel_ref->info();
  38   Create(
  39       pixel_ref, gfx::Size(info.fWidth, info.fHeight), UIResourceBitmap::RGBA8);
  40
  41   SetOpaque(skbitmap.isOpaque());
  42 }
  43
  44 UIResourceBitmap::UIResourceBitmap(const skia::RefPtr<SkPixelRef>& pixel_ref,
  45                                    gfx::Size size) {
  46   Create(pixel_ref, size, UIResourceBitmap::ETC1);
  47 }
  48
  49 UIResourceBitmap::~UIResourceBitmap() {}
  50
  51 AutoLockUIResourceBitmap::AutoLockUIResourceBitmap(
  52     const UIResourceBitmap& bitmap) : bitmap_(bitmap) {
  53   bitmap_.pixel_ref_->lockPixels();
  54 }
  55
  56 AutoLockUIResourceBitmap::~AutoLockUIResourceBitmap() {
  57   bitmap_.pixel_ref_->unlockPixels();
  58 }
  59
  60 const uint8_t* AutoLockUIResourceBitmap::GetPixels() const {
  61   return static_cast<const uint8_t*>(bitmap_.pixel_ref_->pixels());
  62 }
  63
  64 }  // namespace cc