gfx/2d/SourceSurfaceSkia.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6
   7 #include "Logging.h"
   8 #include "SourceSurfaceSkia.h"
   9 #include "skia/SkBitmap.h"
  10 #include "skia/SkDevice.h"
  11 #include "HelpersSkia.h"
  12 #include "DrawTargetSkia.h"
  13 #include "DataSurfaceHelpers.h"
  14
  15 namespace mozilla {
  16 namespace gfx {
  17
  18 SourceSurfaceSkia::SourceSurfaceSkia()
  19   : mDrawTarget(nullptr), mLocked(false)
  20 {
  21 }
  22
  23 SourceSurfaceSkia::~SourceSurfaceSkia()
  24 {
  25   MaybeUnlock();
  26   if (mDrawTarget) {
  27     mDrawTarget->SnapshotDestroyed();
  28     mDrawTarget = nullptr;
  29   }
  30 }
  31
  32 IntSize
  33 SourceSurfaceSkia::GetSize() const
  34 {
  35   return mSize;
  36 }
  37
  38 SurfaceFormat
  39 SourceSurfaceSkia::GetFormat() const
  40 {
  41   return mFormat;
  42 }
  43
  44 bool
  45 SourceSurfaceSkia::InitFromCanvas(SkCanvas* aCanvas,
  46                                   SurfaceFormat aFormat,
  47                                   DrawTargetSkia* aOwner)
  48 {
  49   SkISize size = aCanvas->getDeviceSize();
  50
  51   mBitmap = (SkBitmap)aCanvas->getDevice()->accessBitmap(false);
  52   mFormat = aFormat;
  53
  54   mSize = IntSize(size.fWidth, size.fHeight);
  55   mStride = mBitmap.rowBytes();
  56   mDrawTarget = aOwner;
  57
  58   return true;
  59 }
  60
  61 bool
  62 SourceSurfaceSkia::InitFromData(unsigned char* aData,
  63                                 const IntSize &aSize,
  64                                 int32_t aStride,
  65                                 SurfaceFormat aFormat)
  66 {
  67   SkBitmap temp;
  68   SkAlphaType alphaType = (aFormat == SurfaceFormat::B8G8R8X8) ?
  69     kOpaque_SkAlphaType : kPremul_SkAlphaType;
  70
  71   SkImageInfo info = SkImageInfo::Make(aSize.width,
  72                                        aSize.height,
  73                                        GfxFormatToSkiaColorType(aFormat),
  74                                        alphaType);
  75   temp.setInfo(info, aStride);
  76   temp.setPixels(aData);
  77
  78   if (!temp.copyTo(&mBitmap, GfxFormatToSkiaColorType(aFormat))) {
  79     return false;
  80   }
  81
  82   if (aFormat == SurfaceFormat::B8G8R8X8) {
  83     mBitmap.setAlphaType(kIgnore_SkAlphaType);
  84   }
  85
  86   mSize = aSize;
  87   mFormat = aFormat;
  88   mStride = mBitmap.rowBytes();
  89   return true;
  90 }
  91
  92 unsigned char*
  93 SourceSurfaceSkia::GetData()
  94 {
  95   if (!mLocked) {
  96     mBitmap.lockPixels();
  97     mLocked = true;
  98   }
  99
 100   unsigned char *pixels = (unsigned char *)mBitmap.getPixels();
 101   return pixels;
 102 }
 103
 104 void
 105 SourceSurfaceSkia::DrawTargetWillChange()
 106 {
 107   if (mDrawTarget) {
 108     MaybeUnlock();
 109
 110     mDrawTarget = nullptr;
 111     SkBitmap temp = mBitmap;
 112     mBitmap.reset();
 113     temp.copyTo(&mBitmap, temp.colorType());
 114   }
 115 }
 116
 117 void
 118 SourceSurfaceSkia::MaybeUnlock()
 119 {
 120   if (mLocked) {
 121     mBitmap.unlockPixels();
 122     mLocked = false;
 123   }
 124 }
 125
 126 }
 127 }