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                               const 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.colorType(), kPMColor_SkColorType);
  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 gfx::Size& size, bool is_opaque) {
  45   SkAlphaType alphaType = is_opaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType;
  46   SkImageInfo info =
  47       SkImageInfo::MakeN32(size.width(), size.height(), alphaType);
  48   skia::RefPtr<SkPixelRef> pixel_ref = skia::AdoptRef(
  49       SkMallocPixelRef::NewAllocate(info, info.minRowBytes(), NULL));
  50   pixel_ref->setImmutable();
  51   Create(pixel_ref, size, UIResourceBitmap::RGBA8);
  52   SetOpaque(is_opaque);
  53 }
  54
  55 UIResourceBitmap::UIResourceBitmap(const skia::RefPtr<SkPixelRef>& pixel_ref,
  56                                    const gfx::Size& size) {
  57   Create(pixel_ref, size, UIResourceBitmap::ETC1);
  58 }
  59
  60 UIResourceBitmap::~UIResourceBitmap() {}
  61
  62 AutoLockUIResourceBitmap::AutoLockUIResourceBitmap(
  63     const UIResourceBitmap& bitmap) : bitmap_(bitmap) {
  64   bitmap_.pixel_ref_->lockPixels();
  65 }
  66
  67 AutoLockUIResourceBitmap::~AutoLockUIResourceBitmap() {
  68   bitmap_.pixel_ref_->unlockPixels();
  69 }
  70
  71 const uint8_t* AutoLockUIResourceBitmap::GetPixels() const {
  72   return static_cast<const uint8_t*>(bitmap_.pixel_ref_->pixels());
  73 }
  74
  75 }  // namespace cc