| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "CommandLineFlags.h" |
| #include "Resources.h" |
| #include "SkAnimTimer.h" |
| #include "SkCanvas.h" |
| #include "SkCodec.h" |
| #include "SkColor.h" |
| #include "SkFont.h" |
| #include "SkPaint.h" |
| #include "SkString.h" |
| #include "ToolUtils.h" |
| #include "gm.h" |
| |
| #include <vector> |
| |
| DEFINE_string(animatedGif, "images/test640x479.gif", "Animated gif in resources folder"); |
| |
| class AnimatedGifGM : public skiagm::GM { |
| private: |
| std::unique_ptr<SkCodec> fCodec; |
| int fFrame; |
| double fNextUpdate; |
| int fTotalFrames; |
| std::vector<SkCodec::FrameInfo> fFrameInfos; |
| std::vector<SkBitmap> fFrames; |
| |
| void drawFrame(SkCanvas* canvas, int frameIndex) { |
| // FIXME: Create from an Image/ImageGenerator? |
| if (frameIndex >= (int) fFrames.size()) { |
| fFrames.resize(frameIndex + 1); |
| } |
| SkBitmap& bm = fFrames[frameIndex]; |
| if (!bm.getPixels()) { |
| const SkImageInfo info = fCodec->getInfo().makeColorType(kN32_SkColorType); |
| bm.allocPixels(info); |
| |
| SkCodec::Options opts; |
| opts.fFrameIndex = frameIndex; |
| const int requiredFrame = fFrameInfos[frameIndex].fRequiredFrame; |
| if (requiredFrame != SkCodec::kNoFrame) { |
| SkASSERT(requiredFrame >= 0 |
| && static_cast<size_t>(requiredFrame) < fFrames.size()); |
| SkBitmap& requiredBitmap = fFrames[requiredFrame]; |
| // For simplicity, do not try to cache old frames |
| if (requiredBitmap.getPixels() && |
| ToolUtils::copy_to(&bm, requiredBitmap.colorType(), requiredBitmap)) { |
| opts.fPriorFrame = requiredFrame; |
| } |
| } |
| |
| if (SkCodec::kSuccess != fCodec->getPixels(info, bm.getPixels(), |
| bm.rowBytes(), &opts)) { |
| SkDebugf("Could not getPixels for frame %i: %s", frameIndex, FLAGS_animatedGif[0]); |
| return; |
| } |
| } |
| |
| canvas->drawBitmap(bm, 0, 0); |
| } |
| |
| public: |
| AnimatedGifGM() |
| : fFrame(0) |
| , fNextUpdate (-1) |
| , fTotalFrames (-1) {} |
| |
| private: |
| SkString onShortName() override { |
| return SkString("animatedGif"); |
| } |
| |
| SkISize onISize() override { |
| if (this->initCodec()) { |
| SkISize dim = fCodec->getInfo().dimensions(); |
| // Wide enough to display all the frames. |
| dim.fWidth *= fTotalFrames; |
| // Tall enough to show the row of frames plus an animating version. |
| dim.fHeight *= 2; |
| return dim; |
| } |
| return SkISize::Make(640, 480); |
| } |
| |
| bool initCodec() { |
| if (fCodec) { |
| return true; |
| } |
| if (FLAGS_animatedGif.isEmpty()) { |
| SkDebugf("Nothing specified for --animatedGif!"); |
| return false; |
| } |
| |
| std::unique_ptr<SkStream> stream(GetResourceAsStream(FLAGS_animatedGif[0])); |
| if (!stream) { |
| return false; |
| } |
| |
| fCodec = SkCodec::MakeFromStream(std::move(stream)); |
| if (!fCodec) { |
| return false; |
| } |
| |
| fFrame = 0; |
| fFrameInfos = fCodec->getFrameInfo(); |
| fTotalFrames = fFrameInfos.size(); |
| return true; |
| } |
| |
| DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override { |
| if (!this->initCodec()) { |
| errorMsg->printf("Could not create codec from %s", FLAGS_animatedGif[0]); |
| return DrawResult::kFail; |
| } |
| |
| canvas->save(); |
| for (int frameIndex = 0; frameIndex < fTotalFrames; frameIndex++) { |
| this->drawFrame(canvas, frameIndex); |
| canvas->translate(SkIntToScalar(fCodec->getInfo().width()), 0); |
| } |
| canvas->restore(); |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->translate(0, SkIntToScalar(fCodec->getInfo().height())); |
| this->drawFrame(canvas, fFrame); |
| return DrawResult::kOk; |
| } |
| |
| bool onAnimate(const SkAnimTimer& timer) override { |
| if (!fCodec || fTotalFrames == 1) { |
| return false; |
| } |
| |
| double secs = timer.msec() * .1; |
| if (fNextUpdate < double(0)) { |
| // This is a sentinel that we have not done any updates yet. |
| // I'm assuming this gets called *after* onOnceBeforeDraw, so our first frame should |
| // already have been retrieved. |
| SkASSERT(fFrame == 0); |
| fNextUpdate = secs + fFrameInfos[fFrame].fDuration; |
| |
| return true; |
| } |
| |
| if (secs < fNextUpdate) { |
| return true; |
| } |
| |
| while (secs >= fNextUpdate) { |
| // Retrieve the next frame. |
| fFrame++; |
| if (fFrame == fTotalFrames) { |
| fFrame = 0; |
| } |
| |
| // Note that we loop here. This is not safe if we need to draw the intermediate frame |
| // in order to draw correctly. |
| fNextUpdate += fFrameInfos[fFrame].fDuration; |
| } |
| |
| return true; |
| } |
| }; |
| DEF_GM(return new AnimatedGifGM); |
| |
| |
| #include "SkAnimCodecPlayer.h" |
| #include "SkOSFile.h" |
| #include "SkMakeUnique.h" |
| |
| static std::unique_ptr<SkCodec> load_codec(const char filename[]) { |
| return SkCodec::MakeFromData(SkData::MakeFromFileName(filename)); |
| } |
| |
| class AnimCodecPlayerGM : public skiagm::GM { |
| private: |
| std::vector<std::unique_ptr<SkAnimCodecPlayer> > fPlayers; |
| uint32_t fBaseMSec = 0; |
| |
| public: |
| AnimCodecPlayerGM() { |
| const char* root = "/skia/anim/"; |
| SkOSFile::Iter iter(root); |
| SkString path; |
| while (iter.next(&path)) { |
| SkString completepath; |
| completepath.printf("%s%s", root, path.c_str()); |
| auto codec = load_codec(completepath.c_str()); |
| if (codec) { |
| fPlayers.push_back(skstd::make_unique<SkAnimCodecPlayer>(std::move(codec))); |
| } |
| } |
| } |
| |
| private: |
| SkString onShortName() override { |
| return SkString("AnimCodecPlayer"); |
| } |
| |
| SkISize onISize() override { |
| return { 1024, 768 }; |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->scale(0.25f, 0.25f); |
| for (auto& p : fPlayers) { |
| canvas->drawImage(p->getFrame(), 0, 0, nullptr); |
| canvas->translate(p->dimensions().width(), 0); |
| } |
| } |
| |
| bool onAnimate(const SkAnimTimer& timer) override { |
| if (fBaseMSec == 0) { |
| fBaseMSec = timer.msec(); |
| } |
| for (auto& p : fPlayers) { |
| (void)p->seek(timer.msec() - fBaseMSec); |
| } |
| return true; |
| } |
| }; |
| DEF_GM(return new AnimCodecPlayerGM); |