std::unique_ptr<SkImageGenerator>
SkPictureImageGenerator::Make(const SkISize& size, sk_sp<SkPicture> picture, const SkMatrix* matrix,
const SkPaint* paint, SkImage::BitDepth bitDepth,
sk_sp<SkColorSpace> colorSpace) {
if (!picture || size.isEmpty()) {
return nullptr;
}
if (SkImage::BitDepth::kF16 == bitDepth && (!colorSpace || !colorSpace->gammaIsLinear())) {
return nullptr;
}
if (colorSpace && (!colorSpace->gammaCloseToSRGB() && !colorSpace->gammaIsLinear())) {
return nullptr;
}
SkColorType colorType = kN32_SkColorType;
if (SkImage::BitDepth::kF16 == bitDepth) {
colorType = kRGBA_F16_SkColorType;
}
SkImageInfo info = SkImageInfo::Make(size.width(), size.height(), colorType,
kPremul_SkAlphaType, std::move(colorSpace));
return std::unique_ptr<SkImageGenerator>(
new SkPictureImageGenerator(info, std::move(picture), matrix, paint));
}
SkBitmap DeferredImageDecoder::createLazyDecodingBitmap()
{
SkISize fullSize = SkISize::Make(m_actualDecoder->size().width(), m_actualDecoder->size().height());
ASSERT(!fullSize.isEmpty());
SkIRect fullRect = SkIRect::MakeSize(fullSize);
// Creates a lazily decoded SkPixelRef that references the entire image without scaling.
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, fullSize.width(), fullSize.height());
m_frameGenerator = ImageFrameGenerator::create(fullSize, m_data.release(), m_allDataReceived);
m_actualDecoder.clear();
bitmap.setPixelRef(new LazyDecodingPixelRef(m_frameGenerator, fullSize, fullRect))->unref();
// Use the URI to identify this as a lazily decoded SkPixelRef of type LazyDecodingPixelRef.
// FIXME: It would be more useful to give the actual image URI.
bitmap.pixelRef()->setURI(labelLazyDecoded);
// Inform the bitmap that we will never change the pixels. This is a performance hint
// subsystems that may try to cache this bitmap (e.g. pictures, pipes, gpu, pdf, etc.)
bitmap.setImmutable();
// FIXME: Setting bitmap.setIsOpaque() is big performance gain if possible. We can
// do so safely if the image is fully loaded and it is a JPEG image, or if the image was
// decoded before.
return bitmap;
}
SkShader* SkPictureShader::refBitmapShader(const SkMatrix& matrix, const SkMatrix* localM) const {
SkASSERT(fPicture && fPicture->width() > 0 && fPicture->height() > 0);
SkMatrix m;
m.setConcat(matrix, this->getLocalMatrix());
if (localM) {
m.preConcat(*localM);
}
// Use a rotation-invariant scale
SkPoint scale;
if (!SkDecomposeUpper2x2(m, NULL, &scale, NULL)) {
// Decomposition failed, use an approximation.
scale.set(SkScalarSqrt(m.getScaleX() * m.getScaleX() + m.getSkewX() * m.getSkewX()),
SkScalarSqrt(m.getScaleY() * m.getScaleY() + m.getSkewY() * m.getSkewY()));
}
SkSize scaledSize = SkSize::Make(scale.x() * fPicture->width(), scale.y() * fPicture->height());
SkISize tileSize = scaledSize.toRound();
if (tileSize.isEmpty()) {
return NULL;
}
// The actual scale, compensating for rounding.
SkSize tileScale = SkSize::Make(SkIntToScalar(tileSize.width()) / fPicture->width(),
SkIntToScalar(tileSize.height()) / fPicture->height());
SkAutoMutexAcquire ama(fCachedBitmapShaderMutex);
if (!fCachedBitmapShader || tileScale != fCachedTileScale) {
SkBitmap bm;
if (!bm.allocN32Pixels(tileSize.width(), tileSize.height())) {
return NULL;
}
bm.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(bm);
canvas.scale(tileScale.width(), tileScale.height());
canvas.drawPicture(fPicture);
fCachedTileScale = tileScale;
SkMatrix shaderMatrix = this->getLocalMatrix();
shaderMatrix.preScale(1 / tileScale.width(), 1 / tileScale.height());
fCachedBitmapShader.reset(CreateBitmapShader(bm, fTmx, fTmy, &shaderMatrix));
}
// Increment the ref counter inside the mutex to ensure the returned pointer is still valid.
// Otherwise, the pointer may have been overwritten on a different thread before the object's
// ref count was incremented.
fCachedBitmapShader.get()->ref();
return fCachedBitmapShader;
}
SkBitmap DeferredImageDecoder::createLazyDecodingBitmap(size_t index)
{
SkISize fullSize = SkISize::Make(m_actualDecoder->size().width(), m_actualDecoder->size().height());
ASSERT(!fullSize.isEmpty());
SkIRect fullRect = SkIRect::MakeSize(fullSize);
// Creates a lazily decoded SkPixelRef that references the entire image without scaling.
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, fullSize.width(), fullSize.height());
bitmap.setPixelRef(new LazyDecodingPixelRef(m_frameGenerator, fullSize, index, fullRect))->unref();
// Use the URI to identify this as a lazily decoded SkPixelRef of type LazyDecodingPixelRef.
// FIXME: It would be more useful to give the actual image URI.
bitmap.pixelRef()->setURI(labelLazyDecoded);
// Inform the bitmap that we will never change the pixels. This is a performance hint
// subsystems that may try to cache this bitmap (e.g. pictures, pipes, gpu, pdf, etc.)
bitmap.setImmutable();
return bitmap;
}
