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);
mBitmap.setPixelRef(texRef);
mFormat = aFormat;
mStride = mBitmap.rowBytes();
#endif
mDrawTarget = aOwner;
return true;
}
bool
DrawTargetSkia::Init(const IntSize &aSize, SurfaceFormat aFormat)
{
SkAlphaType alphaType = (aFormat == SurfaceFormat::B8G8R8X8) ?
kOpaque_SkAlphaType : kPremul_SkAlphaType;
SkImageInfo skiInfo = SkImageInfo::Make(
aSize.width, aSize.height,
GfxFormatToSkiaColorType(aFormat),
alphaType);
SkAutoTUnref<SkBaseDevice> device(SkBitmapDevice::Create(skiInfo));
if (!device) {
return false;
}
SkBitmap bitmap = device->accessBitmap(true);
if (!bitmap.allocPixels()) {
return false;
}
bitmap.eraseARGB(0, 0, 0, 0);
SkAutoTUnref<SkCanvas> canvas(new SkCanvas(device.get()));
mSize = aSize;
mCanvas = canvas.get();
mFormat = aFormat;
return true;
}
void
DrawTargetSkia::Init(unsigned char* aData, const IntSize &aSize, int32_t aStride, SurfaceFormat aFormat)
{
SkAlphaType alphaType = kPremul_SkAlphaType;
if (aFormat == SurfaceFormat::B8G8R8X8) {
// We have to manually set the A channel to be 255 as Skia doesn't understand BGRX
ConvertBGRXToBGRA(aData, aSize, aStride);
alphaType = kOpaque_SkAlphaType;
}
SkBitmap bitmap;
SkImageInfo info = SkImageInfo::Make(aSize.width,
aSize.height,
GfxFormatToSkiaColorType(aFormat),
alphaType);
bitmap.setInfo(info, aStride);
bitmap.setPixels(aData);
mCanvas.adopt(new SkCanvas(new SkBitmapDevice(bitmap)));
mSize = aSize;
mFormat = aFormat;
}
bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight, int32_t srcStride,
uint8_t* dstData, int32_t dstWidth, int32_t dstHeight, int32_t dstStride,
SurfaceFormat format)
{
#ifdef USE_SKIA
SkAlphaType alphaType;
if (format == SurfaceFormat::B8G8R8A8) {
alphaType = kPremul_SkAlphaType;
} else {
alphaType = kOpaque_SkAlphaType;
}
SkImageInfo info = SkImageInfo::Make(srcWidth,
srcHeight,
GfxFormatToSkiaColorType(format),
alphaType);
SkBitmap imgSrc;
imgSrc.installPixels(info, srcData, srcStride);
// Rescaler is compatible with 32 bpp only. Convert to RGB32 if needed.
if (format != SurfaceFormat::B8G8R8A8) {
imgSrc.copyTo(&imgSrc, kBGRA_8888_SkColorType);
}
// This returns an SkBitmap backed by dstData; since it also wrote to dstData,
// we don't need to look at that SkBitmap.
SkBitmap result = skia::ImageOperations::Resize(imgSrc,
skia::ImageOperations::RESIZE_BEST,
dstWidth, dstHeight,
dstData);
return !result.isNull();
#else
return false;
#endif
}
