gecko-dev/gfx/2d/SourceSurfaceSkia.cpp

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "Logging.h"
#include "SourceSurfaceSkia.h"
#include "skia/include/core/SkBitmap.h"
#include "skia/include/core/SkDevice.h"
#include "HelpersSkia.h"
#include "DrawTargetSkia.h"
#include "DataSurfaceHelpers.h"
#ifdef USE_SKIA_GPU
#include "skia/include/gpu/SkGrPixelRef.h"
#endif
namespace mozilla {
namespace gfx {
SourceSurfaceSkia::SourceSurfaceSkia()
: mDrawTarget(nullptr), mLocked(false)
{
}
SourceSurfaceSkia::~SourceSurfaceSkia()
{
MaybeUnlock();
if (mDrawTarget) {
mDrawTarget->SnapshotDestroyed();
mDrawTarget = nullptr;
}
}
IntSize
SourceSurfaceSkia::GetSize() const
{
return mSize;
}
SurfaceFormat
SourceSurfaceSkia::GetFormat() const
{
return mFormat;
}
bool
SourceSurfaceSkia::InitFromCanvas(SkCanvas* aCanvas,
SurfaceFormat aFormat,
DrawTargetSkia* aOwner)
{
SkISize size = aCanvas->getDeviceSize();
mBitmap = (SkBitmap)aCanvas->getDevice()->accessBitmap(false);
mFormat = aFormat;
mSize = IntSize(size.fWidth, size.fHeight);
mStride = mBitmap.rowBytes();
mDrawTarget = aOwner;
return true;
}
bool
SourceSurfaceSkia::InitFromData(unsigned char* aData,
const IntSize &aSize,
int32_t aStride,
SurfaceFormat aFormat)
{
SkBitmap temp;
SkAlphaType alphaType = (aFormat == SurfaceFormat::B8G8R8X8) ?
kOpaque_SkAlphaType : kPremul_SkAlphaType;
SkImageInfo info = SkImageInfo::Make(aSize.width,
aSize.height,
GfxFormatToSkiaColorType(aFormat),
alphaType);
temp.setInfo(info, aStride);
temp.setPixels(aData);
if (!temp.copyTo(&mBitmap, GfxFormatToSkiaColorType(aFormat))) {
return false;
}
if (aFormat == SurfaceFormat::B8G8R8X8) {
mBitmap.setAlphaType(kIgnore_SkAlphaType);
}
mSize = aSize;
mFormat = aFormat;
mStride = mBitmap.rowBytes();
return true;
}
bool
SourceSurfaceSkia::InitFromTexture(DrawTargetSkia* aOwner,
unsigned int aTexture,
const IntSize &aSize,
SurfaceFormat aFormat)
{
MOZ_ASSERT(aOwner, "null GrContext");
#ifdef USE_SKIA_GPU
GrBackendTextureDesc skiaTexGlue;
mSize.width = skiaTexGlue.fWidth = aSize.width;
mSize.height = skiaTexGlue.fHeight = aSize.height;
skiaTexGlue.fFlags = kNone_GrBackendTextureFlag;
skiaTexGlue.fOrigin = kBottomLeft_GrSurfaceOrigin;
skiaTexGlue.fConfig = GfxFormatToGrConfig(aFormat);
skiaTexGlue.fSampleCnt = 0;
skiaTexGlue.fTextureHandle = aTexture;
GrTexture *skiaTexture = aOwner->mGrContext->wrapBackendTexture(skiaTexGlue);
SkImageInfo imgInfo = SkImageInfo::Make(aSize.width, aSize.height, GfxFormatToSkiaColorType(aFormat), kOpaque_SkAlphaType);
SkGrPixelRef *texRef = new SkGrPixelRef(imgInfo, skiaTexture, false);
mBitmap.setInfo(imgInfo, aSize.width*aSize.height*4);
mBitmap.setPixelRef(texRef);
#endif
mDrawTarget = aOwner;
return true;
}
unsigned char*
SourceSurfaceSkia::GetData()
{
if (!mLocked) {
mBitmap.lockPixels();
mLocked = true;
}
unsigned char *pixels = (unsigned char *)mBitmap.getPixels();
return pixels;
}
void
SourceSurfaceSkia::DrawTargetWillChange()
{
if (mDrawTarget) {
MaybeUnlock();
mDrawTarget = nullptr;
SkBitmap temp = mBitmap;
mBitmap.reset();
temp.copyTo(&mBitmap, temp.colorType());
}
}
void
SourceSurfaceSkia::MaybeUnlock()
{
if (mLocked) {
mBitmap.unlockPixels();
mLocked = false;
}
}
} // namespace gfx
} // namespace mozilla