| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkAndroidCodec.h" |
| #include "SkAnimatedImage.h" |
| #include "SkCanvas.h" |
| #include "SkCodec.h" |
| #include "SkCodecPriv.h" |
| #include "SkImagePriv.h" |
| #include "SkPicture.h" |
| #include "SkPictureRecorder.h" |
| #include "SkPixelRef.h" |
| |
| #include <utility> |
| |
| sk_sp<SkAnimatedImage> SkAnimatedImage::Make(std::unique_ptr<SkAndroidCodec> codec, |
| SkISize scaledSize, SkIRect cropRect, sk_sp<SkPicture> postProcess) { |
| if (!codec) { |
| return nullptr; |
| } |
| auto info = codec->getInfo().makeWH(scaledSize.width(), scaledSize.height()); |
| return Make(std::move(codec), info, cropRect, std::move(postProcess)); |
| } |
| |
| sk_sp<SkAnimatedImage> SkAnimatedImage::Make(std::unique_ptr<SkAndroidCodec> codec, |
| const SkImageInfo& requestedInfo, SkIRect cropRect, sk_sp<SkPicture> postProcess) { |
| if (!codec) { |
| return nullptr; |
| } |
| |
| auto scaledSize = requestedInfo.dimensions(); |
| auto decodeInfo = requestedInfo; |
| if (codec->getEncodedFormat() != SkEncodedImageFormat::kWEBP |
| || scaledSize.width() >= decodeInfo.width() |
| || scaledSize.height() >= decodeInfo.height()) { |
| // Only libwebp can decode to arbitrary smaller sizes. |
| auto dims = codec->getInfo().dimensions(); |
| decodeInfo = decodeInfo.makeWH(dims.width(), dims.height()); |
| } |
| |
| auto image = sk_sp<SkAnimatedImage>(new SkAnimatedImage(std::move(codec), scaledSize, |
| decodeInfo, cropRect, std::move(postProcess))); |
| if (!image->fDisplayFrame.fBitmap.getPixels()) { |
| // tryAllocPixels failed. |
| return nullptr; |
| } |
| |
| return image; |
| } |
| |
| sk_sp<SkAnimatedImage> SkAnimatedImage::Make(std::unique_ptr<SkAndroidCodec> codec) { |
| if (!codec) { |
| return nullptr; |
| } |
| |
| const auto decodeInfo = codec->getInfo(); |
| const auto scaledSize = decodeInfo.dimensions(); |
| const auto cropRect = SkIRect::MakeSize(scaledSize); |
| auto image = sk_sp<SkAnimatedImage>(new SkAnimatedImage(std::move(codec), scaledSize, |
| decodeInfo, cropRect, nullptr)); |
| |
| if (!image->fDisplayFrame.fBitmap.getPixels()) { |
| // tryAllocPixels failed. |
| return nullptr; |
| } |
| |
| SkASSERT(image->fSimple); |
| return image; |
| } |
| |
| SkAnimatedImage::SkAnimatedImage(std::unique_ptr<SkAndroidCodec> codec, SkISize scaledSize, |
| SkImageInfo decodeInfo, SkIRect cropRect, sk_sp<SkPicture> postProcess) |
| : fCodec(std::move(codec)) |
| , fScaledSize(scaledSize) |
| , fDecodeInfo(decodeInfo) |
| , fCropRect(cropRect) |
| , fPostProcess(std::move(postProcess)) |
| , fFrameCount(fCodec->codec()->getFrameCount()) |
| , fSimple(fScaledSize == fDecodeInfo.dimensions() && !fPostProcess |
| && fCropRect == fDecodeInfo.bounds()) |
| , fFinished(false) |
| , fRepetitionCount(fCodec->codec()->getRepetitionCount()) |
| , fRepetitionsCompleted(0) |
| { |
| if (!fDecodingFrame.fBitmap.tryAllocPixels(fDecodeInfo)) { |
| return; |
| } |
| |
| if (!fSimple) { |
| fMatrix = SkMatrix::MakeTrans(-fCropRect.fLeft, -fCropRect.fTop); |
| float scaleX = (float) fScaledSize.width() / fDecodeInfo.width(); |
| float scaleY = (float) fScaledSize.height() / fDecodeInfo.height(); |
| fMatrix.preConcat(SkMatrix::MakeScale(scaleX, scaleY)); |
| } |
| this->decodeNextFrame(); |
| } |
| |
| SkAnimatedImage::~SkAnimatedImage() { } |
| |
| SkRect SkAnimatedImage::onGetBounds() { |
| return SkRect::MakeIWH(fCropRect.width(), fCropRect.height()); |
| } |
| |
| SkAnimatedImage::Frame::Frame() |
| : fIndex(SkCodec::kNoFrame) |
| {} |
| |
| bool SkAnimatedImage::Frame::init(const SkImageInfo& info, OnInit onInit) { |
| if (fBitmap.getPixels()) { |
| if (fBitmap.pixelRef()->unique()) { |
| SkAssertResult(fBitmap.setAlphaType(info.alphaType())); |
| return true; |
| } |
| |
| // An SkCanvas provided to onDraw is still holding a reference. |
| // Copy before we decode to ensure that we don't overwrite the |
| // expected contents of the image. |
| if (OnInit::kRestoreIfNecessary == onInit) { |
| SkBitmap tmp; |
| if (!tmp.tryAllocPixels(info)) { |
| return false; |
| } |
| |
| memcpy(tmp.getPixels(), fBitmap.getPixels(), fBitmap.computeByteSize()); |
| using std::swap; |
| swap(tmp, fBitmap); |
| return true; |
| } |
| } |
| |
| return fBitmap.tryAllocPixels(info); |
| } |
| |
| bool SkAnimatedImage::Frame::copyTo(Frame* dst) const { |
| if (!dst->init(fBitmap.info(), OnInit::kNoRestore)) { |
| return false; |
| } |
| |
| memcpy(dst->fBitmap.getPixels(), fBitmap.getPixels(), fBitmap.computeByteSize()); |
| dst->fIndex = fIndex; |
| dst->fDisposalMethod = fDisposalMethod; |
| return true; |
| } |
| |
| void SkAnimatedImage::reset() { |
| fFinished = false; |
| fRepetitionsCompleted = 0; |
| if (fDisplayFrame.fIndex != 0) { |
| fDisplayFrame.fIndex = SkCodec::kNoFrame; |
| this->decodeNextFrame(); |
| } |
| } |
| |
| static bool is_restore_previous(SkCodecAnimation::DisposalMethod dispose) { |
| return SkCodecAnimation::DisposalMethod::kRestorePrevious == dispose; |
| } |
| |
| int SkAnimatedImage::computeNextFrame(int current, bool* animationEnded) { |
| SkASSERT(animationEnded != nullptr); |
| *animationEnded = false; |
| |
| const int frameToDecode = current + 1; |
| if (frameToDecode == fFrameCount - 1) { |
| // Final frame. Check to determine whether to stop. |
| fRepetitionsCompleted++; |
| if (fRepetitionCount != SkCodec::kRepetitionCountInfinite |
| && fRepetitionsCompleted > fRepetitionCount) { |
| *animationEnded = true; |
| } |
| } else if (frameToDecode == fFrameCount) { |
| return 0; |
| } |
| return frameToDecode; |
| } |
| |
| double SkAnimatedImage::finish() { |
| fFinished = true; |
| fCurrentFrameDuration = kFinished; |
| return kFinished; |
| } |
| |
| int SkAnimatedImage::decodeNextFrame() { |
| if (fFinished) { |
| return kFinished; |
| } |
| |
| bool animationEnded = false; |
| int frameToDecode = this->computeNextFrame(fDisplayFrame.fIndex, &animationEnded); |
| |
| SkCodec::FrameInfo frameInfo; |
| if (fCodec->codec()->getFrameInfo(frameToDecode, &frameInfo)) { |
| if (!frameInfo.fFullyReceived) { |
| SkCodecPrintf("Frame %i not fully received\n", frameToDecode); |
| return this->finish(); |
| } |
| |
| fCurrentFrameDuration = frameInfo.fDuration; |
| } else { |
| animationEnded = true; |
| if (0 == frameToDecode) { |
| // Static image. This is okay. |
| frameInfo.fRequiredFrame = SkCodec::kNoFrame; |
| frameInfo.fAlphaType = fCodec->getInfo().alphaType(); |
| frameInfo.fDisposalMethod = SkCodecAnimation::DisposalMethod::kKeep; |
| // These fields won't be read. |
| frameInfo.fDuration = INT_MAX; |
| frameInfo.fFullyReceived = true; |
| fCurrentFrameDuration = kFinished; |
| } else { |
| SkCodecPrintf("Error getting frameInfo for frame %i\n", |
| frameToDecode); |
| return this->finish(); |
| } |
| } |
| |
| if (frameToDecode == fDisplayFrame.fIndex) { |
| if (animationEnded) { |
| return this->finish(); |
| } |
| return fCurrentFrameDuration; |
| } |
| |
| for (Frame* frame : { &fRestoreFrame, &fDecodingFrame }) { |
| if (frameToDecode == frame->fIndex) { |
| using std::swap; |
| swap(fDisplayFrame, *frame); |
| if (animationEnded) { |
| return this->finish(); |
| } |
| return fCurrentFrameDuration; |
| } |
| } |
| |
| // The following code makes an effort to avoid overwriting a frame that will |
| // be used again. If frame |i| is_restore_previous, frame |i+1| will not |
| // depend on frame |i|, so do not overwrite frame |i-1|, which may be needed |
| // for frame |i+1|. |
| // We could be even smarter about which frames to save by looking at the |
| // entire dependency chain. |
| SkCodec::Options options; |
| options.fFrameIndex = frameToDecode; |
| if (frameInfo.fRequiredFrame == SkCodec::kNoFrame) { |
| if (is_restore_previous(frameInfo.fDisposalMethod)) { |
| // frameToDecode will be discarded immediately after drawing, so |
| // do not overwrite a frame which could possibly be used in the |
| // future. |
| if (fDecodingFrame.fIndex != SkCodec::kNoFrame && |
| !is_restore_previous(fDecodingFrame.fDisposalMethod)) { |
| using std::swap; |
| swap(fDecodingFrame, fRestoreFrame); |
| } |
| } |
| } else { |
| auto validPriorFrame = [&frameInfo, &frameToDecode](const Frame& frame) { |
| if (SkCodec::kNoFrame == frame.fIndex || |
| is_restore_previous(frame.fDisposalMethod)) { |
| return false; |
| } |
| |
| return frame.fIndex >= frameInfo.fRequiredFrame && frame.fIndex < frameToDecode; |
| }; |
| if (validPriorFrame(fDecodingFrame)) { |
| if (is_restore_previous(frameInfo.fDisposalMethod)) { |
| // fDecodingFrame is a good frame to use for this one, but we |
| // don't want to overwrite it. |
| fDecodingFrame.copyTo(&fRestoreFrame); |
| } |
| options.fPriorFrame = fDecodingFrame.fIndex; |
| } else if (validPriorFrame(fDisplayFrame)) { |
| if (!fDisplayFrame.copyTo(&fDecodingFrame)) { |
| SkCodecPrintf("Failed to allocate pixels for frame\n"); |
| return this->finish(); |
| } |
| options.fPriorFrame = fDecodingFrame.fIndex; |
| } else if (validPriorFrame(fRestoreFrame)) { |
| if (!is_restore_previous(frameInfo.fDisposalMethod)) { |
| using std::swap; |
| swap(fDecodingFrame, fRestoreFrame); |
| } else if (!fRestoreFrame.copyTo(&fDecodingFrame)) { |
| SkCodecPrintf("Failed to restore frame\n"); |
| return this->finish(); |
| } |
| options.fPriorFrame = fDecodingFrame.fIndex; |
| } |
| } |
| |
| auto alphaType = kOpaque_SkAlphaType == frameInfo.fAlphaType ? |
| kOpaque_SkAlphaType : kPremul_SkAlphaType; |
| auto info = fDecodeInfo.makeAlphaType(alphaType); |
| SkBitmap* dst = &fDecodingFrame.fBitmap; |
| if (!fDecodingFrame.init(info, Frame::OnInit::kRestoreIfNecessary)) { |
| return this->finish(); |
| } |
| |
| auto result = fCodec->codec()->getPixels(dst->info(), dst->getPixels(), dst->rowBytes(), |
| &options); |
| if (result != SkCodec::kSuccess) { |
| SkCodecPrintf("error %i, frame %i of %i\n", result, frameToDecode, fFrameCount); |
| return this->finish(); |
| } |
| |
| fDecodingFrame.fIndex = frameToDecode; |
| fDecodingFrame.fDisposalMethod = frameInfo.fDisposalMethod; |
| |
| using std::swap; |
| swap(fDecodingFrame, fDisplayFrame); |
| fDisplayFrame.fBitmap.notifyPixelsChanged(); |
| |
| if (animationEnded) { |
| return this->finish(); |
| } |
| return fCurrentFrameDuration; |
| } |
| |
| void SkAnimatedImage::onDraw(SkCanvas* canvas) { |
| auto image = SkMakeImageFromRasterBitmap(fDisplayFrame.fBitmap, |
| kNever_SkCopyPixelsMode); |
| |
| if (fSimple) { |
| canvas->drawImage(image, 0, 0); |
| return; |
| } |
| |
| SkRect bounds = this->getBounds(); |
| if (fPostProcess) { |
| canvas->saveLayer(&bounds, nullptr); |
| } |
| { |
| SkAutoCanvasRestore acr(canvas, fPostProcess != nullptr); |
| canvas->concat(fMatrix); |
| SkPaint paint; |
| paint.setFilterQuality(kLow_SkFilterQuality); |
| canvas->drawImage(image, 0, 0, &paint); |
| } |
| if (fPostProcess) { |
| canvas->drawPicture(fPostProcess); |
| canvas->restore(); |
| } |
| } |
| |
| void SkAnimatedImage::setRepetitionCount(int newCount) { |
| fRepetitionCount = newCount; |
| } |
