31fddc3769
Bug: skia:11900 Change-Id: I97d1f2a9523252318ffb4f479b197cb0ef9cf0b1 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/402920 Reviewed-by: Jim Van Verth <jvanverth@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
435 lines
17 KiB
C++
435 lines
17 KiB
C++
/*
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* Copyright 2021 Google LLC
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "tools/MSKPPlayer.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkCanvasVirtualEnforcer.h"
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#include "include/core/SkPicture.h"
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#include "include/core/SkPictureRecorder.h"
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#include "include/core/SkSurface.h"
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#include "include/gpu/GrDirectContext.h"
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#include "include/private/SkTArray.h"
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#include "include/utils/SkNoDrawCanvas.h"
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#include "src/core/SkCanvasPriv.h"
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#include "src/core/SkTLazy.h"
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#include "src/utils/SkMultiPictureDocument.h"
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#include "tools/SkSharingProc.h"
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///////////////////////////////////////////////////////////////////////////////
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// Base Cmd struct.
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struct MSKPPlayer::Cmd {
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virtual ~Cmd() = default;
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virtual void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const = 0;
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};
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// Draws a SkPicture.
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struct MSKPPlayer::PicCmd : Cmd {
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sk_sp<SkPicture> fContent;
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void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const override {
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canvas->drawPicture(fContent.get());
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}
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};
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// Draws another layer. Stores the ID of the layer to draw and what command index on that
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// layer should be current when the layer is drawn. The layer contents are updated to the
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// stored command index before the layer is drawn.
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struct MSKPPlayer::DrawLayerCmd : Cmd {
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int fLayerId;
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size_t fLayerCmdCnt;
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SkRect fSrcRect;
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SkRect fDstRect;
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SkSamplingOptions fSampling;
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SkCanvas::SrcRectConstraint fConstraint;
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SkTLazy<SkPaint> fPaint;
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void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const override;
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};
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void MSKPPlayer::DrawLayerCmd::draw(SkCanvas* canvas,
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const LayerMap& layerMap,
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LayerStateMap* layerStateMap) const {
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const Layer& layer = layerMap.at(fLayerId);
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LayerState* layerState = &(*layerStateMap)[fLayerId];
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if (!layerState->fSurface) {
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layerState->fCurrCmd = 0;
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layerState->fSurface = MSKPPlayer::MakeSurfaceForLayer(layer, canvas);
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if (!layerState->fSurface) {
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SkDebugf("Couldn't create surface for layer");
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return;
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}
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}
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size_t cmd = layerState->fCurrCmd;
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if (cmd > fLayerCmdCnt) {
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// If the layer contains contents from later commands then replay from the beginning.
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cmd = 0;
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}
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SkCanvas* layerCanvas = layerState->fSurface->getCanvas();
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for (; cmd < fLayerCmdCnt; ++cmd) {
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layer.fCmds[cmd]->draw(layerCanvas, layerMap, layerStateMap);
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}
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const SkPaint* paint = fPaint.isValid() ? fPaint.get() : nullptr;
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canvas->drawImageRect(layerState->fSurface->makeImageSnapshot(),
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fSrcRect,
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fDstRect,
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fSampling,
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paint,
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fConstraint);
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}
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///////////////////////////////////////////////////////////////////////////////
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class MSKPPlayer::CmdRecordCanvas : public SkCanvasVirtualEnforcer<SkCanvas> {
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public:
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CmdRecordCanvas(Layer* dst, LayerMap* offscreenLayers)
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: fDst(dst), fOffscreenLayers(offscreenLayers) {
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fRecorder.beginRecording(SkRect::Make(dst->fDimensions));
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}
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~CmdRecordCanvas() override { this->recordPicCmd(); }
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protected:
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void onDrawPaint(const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawPaint(paint);
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}
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void onDrawBehind(const SkPaint& paint) override {
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SkCanvasPriv::DrawBehind(fRecorder.getRecordingCanvas(), paint);
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}
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void onDrawRect(const SkRect& rect, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawRect(rect, paint);
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}
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void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawRRect(rrect, paint);
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}
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void onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawDRRect(outer, inner, paint);
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}
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void onDrawOval(const SkRect& rect, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawOval(rect, paint);
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}
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void onDrawArc(const SkRect& rect,
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SkScalar startAngle,
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SkScalar sweepAngle,
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bool useCenter,
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const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawArc(rect, startAngle, sweepAngle, useCenter, paint);
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}
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void onDrawPath(const SkPath& path, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawPath(path, paint);
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}
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void onDrawRegion(const SkRegion& region, const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawRegion(region, paint);
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}
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void onDrawTextBlob(const SkTextBlob* blob,
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SkScalar x,
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SkScalar y,
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const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawTextBlob(blob, x, y, paint);
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}
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void onDrawPatch(const SkPoint cubics[12],
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const SkColor colors[4],
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const SkPoint texCoords[4],
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SkBlendMode mode,
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const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawPatch(cubics, colors, texCoords, mode, paint);
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}
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void onDrawPoints(SkCanvas::PointMode mode,
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size_t count,
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const SkPoint pts[],
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const SkPaint& paint) override {
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fRecorder.getRecordingCanvas()->drawPoints(mode, count, pts, paint);
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}
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void onDrawImage2(const SkImage* image,
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SkScalar dx,
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SkScalar dy,
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const SkSamplingOptions& sampling,
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const SkPaint* paint) override {
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fRecorder.getRecordingCanvas()->drawImage(image, dx, dy, sampling, paint);
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}
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void onDrawImageRect2(const SkImage* image,
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const SkRect& src,
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const SkRect& dst,
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const SkSamplingOptions& sampling,
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const SkPaint* paint,
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SrcRectConstraint constraint) override {
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if (fNextDrawImageFromLayerID != -1) {
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this->recordPicCmd();
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auto drawLayer = std::make_unique<DrawLayerCmd>();
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drawLayer->fLayerId = fNextDrawImageFromLayerID;
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drawLayer->fLayerCmdCnt = fOffscreenLayers->at(fNextDrawImageFromLayerID).fCmds.size();
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drawLayer->fSrcRect = src;
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drawLayer->fDstRect = dst;
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drawLayer->fSampling = sampling;
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drawLayer->fConstraint = constraint;
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if (paint) {
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drawLayer->fPaint.init(*paint);
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}
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fDst->fCmds.push_back(std::move(drawLayer));
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fNextDrawImageFromLayerID = -1;
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return;
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}
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fRecorder.getRecordingCanvas()->drawImageRect(image, src, dst, sampling, paint, constraint);
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}
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void onDrawImageLattice2(const SkImage* image,
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const Lattice& lattice,
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const SkRect& dst,
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SkFilterMode mode,
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const SkPaint* paint) override {
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fRecorder.getRecordingCanvas()->drawImageLattice(image, lattice, dst, mode, paint);
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}
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void onDrawAtlas2(const SkImage* image,
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const SkRSXform rsxForms[],
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const SkRect src[],
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const SkColor colors[],
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int count,
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SkBlendMode mode,
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const SkSamplingOptions& sampling,
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const SkRect* cull,
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const SkPaint* paint) override {
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fRecorder.getRecordingCanvas()->drawAtlas(image,
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rsxForms,
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src,
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colors,
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count,
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mode,
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sampling,
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cull,
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paint);
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}
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void onDrawEdgeAAImageSet2(const ImageSetEntry imageSet[],
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int count,
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const SkPoint dstClips[],
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const SkMatrix preViewMatrices[],
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const SkSamplingOptions& sampling,
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const SkPaint* paint,
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SrcRectConstraint constraint) override {
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fRecorder.getRecordingCanvas()->experimental_DrawEdgeAAImageSet(imageSet,
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count,
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dstClips,
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preViewMatrices,
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sampling,
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paint,
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constraint);
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}
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#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
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void onDrawEdgeAAQuad(const SkRect& rect,
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const SkPoint clip[4],
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SkCanvas::QuadAAFlags aaFlags,
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const SkColor4f& color,
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SkBlendMode mode) override {}
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#else
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void onDrawEdgeAAQuad(const SkRect& rect,
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const SkPoint clip[4],
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SkCanvas::QuadAAFlags aaFlags,
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const SkColor4f& color,
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SkBlendMode mode) override {
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fRecorder.getRecordingCanvas()->experimental_DrawEdgeAAQuad(rect,
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clip,
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aaFlags,
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color,
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mode);
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}
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#endif
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void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override {
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static constexpr char kOffscreenLayerDraw[] = "OffscreenLayerDraw";
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static constexpr char kSurfaceID[] = "SurfaceID";
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SkTArray<SkString> tokens;
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SkStrSplit(key, "|", kStrict_SkStrSplitMode, &tokens);
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if (tokens.size() == 2) {
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if (tokens[0].equals(kOffscreenLayerDraw)) {
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// Indicates that the next drawPicture command contains the SkPicture to render
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// to the layer identified by the ID. 'rect' indicates the dirty area to update
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// (and indicates the layer size if this command is introducing a new layer id).
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fNextDrawToLayerID = std::stoi(tokens[1].c_str());
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if (fOffscreenLayers->find(fNextDrawToLayerID) == fOffscreenLayers->end()) {
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SkASSERT(rect.left() == 0 && rect.top() == 0);
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SkISize size = {SkScalarCeilToInt(rect.right()),
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SkScalarCeilToInt(rect.bottom())};
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(*fOffscreenLayers)[fNextDrawToLayerID].fDimensions = size;
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}
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// The next draw picture will notice that fNextDrawLayerID is set and redirect
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// the picture to the offscreen layer.
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return;
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} else if (tokens[0].equals(kSurfaceID)) {
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// Indicates that the following drawImageRect should draw an offscreen layer
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// to this layer.
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fNextDrawImageFromLayerID = std::stoi(tokens[1].c_str());
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return;
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}
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}
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}
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void onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) override {
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fRecorder.getRecordingCanvas()->private_draw_shadow_rec(path, rec);
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}
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void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override {
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fRecorder.getRecordingCanvas()->drawDrawable(drawable, matrix);
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}
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void onDrawPicture(const SkPicture* picture,
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const SkMatrix* matrix,
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const SkPaint* paint) override {
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if (fNextDrawToLayerID != -1) {
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SkASSERT(!matrix);
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SkASSERT(!paint);
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CmdRecordCanvas sc(&fOffscreenLayers->at(fNextDrawToLayerID), fOffscreenLayers);
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picture->playback(&sc);
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fNextDrawToLayerID = -1;
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return;
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}
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if (paint) {
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this->saveLayer(nullptr, paint);
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}
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if (matrix) {
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this->save();
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this->concat(*matrix);
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}
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picture->playback(this);
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if (matrix) {
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this->restore();
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}
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if (paint) {
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this->restore();
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}
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fRecorder.getRecordingCanvas()->drawPicture(picture, matrix, paint);
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}
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private:
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void recordPicCmd() {
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auto cmd = std::make_unique<PicCmd>();
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cmd->fContent = fRecorder.finishRecordingAsPicture();
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if (cmd->fContent) {
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fDst->fCmds.push_back(std::move(cmd));
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}
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// Set up to accumulate again.
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fRecorder.beginRecording(SkRect::Make(fDst->fDimensions));
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}
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SkPictureRecorder fRecorder; // accumulates draws until we draw an offscreen into this layer.
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Layer* fDst = nullptr;
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int fNextDrawToLayerID = -1;
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int fNextDrawImageFromLayerID = -1;
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LayerMap* fOffscreenLayers = nullptr;
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};
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///////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<MSKPPlayer> MSKPPlayer::Make(SkStreamSeekable* stream) {
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auto deserialContext = std::make_unique<SkSharingDeserialContext>();
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SkDeserialProcs procs;
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procs.fImageProc = SkSharingDeserialContext::deserializeImage;
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procs.fImageCtx = deserialContext.get();
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int pageCount = SkMultiPictureDocumentReadPageCount(stream);
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if (!pageCount) {
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return nullptr;
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}
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std::vector<SkDocumentPage> pages(pageCount);
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if (!SkMultiPictureDocumentRead(stream, pages.data(), pageCount, &procs)) {
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return nullptr;
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}
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std::unique_ptr<MSKPPlayer> result(new MSKPPlayer);
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result->fRootLayers.reserve(pages.size());
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for (const auto& page : pages) {
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SkISize dims = {SkScalarCeilToInt(page.fSize.width()),
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SkScalarCeilToInt(page.fSize.height())};
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result->fRootLayers.emplace_back();
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result->fRootLayers.back().fDimensions = dims;
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result->fMaxDimensions.fWidth = std::max(dims.width() , result->fMaxDimensions.width() );
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result->fMaxDimensions.fHeight = std::max(dims.height(), result->fMaxDimensions.height());
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CmdRecordCanvas sc(&result->fRootLayers.back(), &result->fOffscreenLayers);
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page.fPicture->playback(&sc);
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}
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return result;
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}
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MSKPPlayer::~MSKPPlayer() = default;
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SkISize MSKPPlayer::frameDimensions(int i) const {
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if (i < 0 || i >= this->numFrames()) {
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return {-1, -1};
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}
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return fRootLayers[i].fDimensions;
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}
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bool MSKPPlayer::playFrame(SkCanvas* canvas, int i) {
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if (i < 0 || i >= this->numFrames()) {
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return false;
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}
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// Find the first offscreen layer that has a valid surface. If it's recording context
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// differs from the passed canvas's then reset all the layers. Playback will
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// automatically allocate new surfaces for offscreen layers as they're encountered.
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for (const auto& ols : fOffscreenLayerStates) {
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const LayerState& state = ols.second;
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if (state.fSurface) {
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if (state.fSurface->recordingContext() != canvas->recordingContext()) {
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this->resetLayers();
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}
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break;
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}
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}
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// Replay all the commands for this frame to the caller's canvas.
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const Layer& layer = fRootLayers[i];
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for (const auto& cmd : layer.fCmds) {
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cmd->draw(canvas, fOffscreenLayers, &fOffscreenLayerStates);
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}
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return true;
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}
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sk_sp<SkSurface> MSKPPlayer::MakeSurfaceForLayer(const Layer& layer, SkCanvas* rootCanvas) {
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// Assume layer has same surface props and info as this (mskp doesn't currently record this
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// data).
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SkSurfaceProps props;
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rootCanvas->getProps(&props);
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return rootCanvas->makeSurface(rootCanvas->imageInfo().makeDimensions(layer.fDimensions),
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&props);
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}
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void MSKPPlayer::resetLayers() { fOffscreenLayerStates.clear(); }
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void MSKPPlayer::rewindLayers() {
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for (auto& [id, state] : fOffscreenLayerStates) {
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state.fCurrCmd = -1;
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}
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}
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void MSKPPlayer::allocateLayers(SkCanvas* canvas) {
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// Iterate over layers not states as states are lazily created in playback but here we want to
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// create any that don't already exist.
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for (auto& [id, layer] : fOffscreenLayers) {
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LayerState& state = fOffscreenLayerStates[id];
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if (!state.fSurface || state.fSurface->recordingContext() != canvas->recordingContext()) {
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state.fCurrCmd = -1;
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state.fSurface = MakeSurfaceForLayer(fOffscreenLayers[id], canvas);
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}
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}
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}
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