Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2021 Google LLC |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "tools/MSKPPlayer.h" |
| 9 | |
| 10 | #include "include/core/SkCanvas.h" |
| 11 | #include "include/core/SkCanvasVirtualEnforcer.h" |
| 12 | #include "include/core/SkPicture.h" |
| 13 | #include "include/core/SkPictureRecorder.h" |
| 14 | #include "include/core/SkSurface.h" |
Brian Salomon | 31fddc3 | 2021-04-30 13:08:55 -0400 | [diff] [blame] | 15 | #include "include/gpu/GrDirectContext.h" |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 16 | #include "include/private/SkTArray.h" |
| 17 | #include "include/utils/SkNoDrawCanvas.h" |
| 18 | #include "src/core/SkCanvasPriv.h" |
| 19 | #include "src/core/SkTLazy.h" |
| 20 | #include "src/utils/SkMultiPictureDocument.h" |
| 21 | #include "tools/SkSharingProc.h" |
| 22 | |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 23 | /////////////////////////////////////////////////////////////////////////////// |
| 24 | |
| 25 | // Base Cmd struct. |
| 26 | struct MSKPPlayer::Cmd { |
| 27 | virtual ~Cmd() = default; |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 28 | virtual bool isFullRedraw(SkCanvas*) const = 0; |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 29 | virtual void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const = 0; |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 30 | // If this command draws another layer, return it's ID. Otherwise, -1. |
| 31 | virtual int layerID() const { return -1; } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 32 | }; |
| 33 | |
| 34 | // Draws a SkPicture. |
| 35 | struct MSKPPlayer::PicCmd : Cmd { |
| 36 | sk_sp<SkPicture> fContent; |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 37 | SkIRect fClipRect = SkIRect::MakeEmpty(); // clip for picture (no clip if empty). |
| 38 | |
| 39 | bool isFullRedraw(SkCanvas* canvas) const override { |
| 40 | if (fClipRect.isEmpty()) { |
| 41 | return false; |
| 42 | } |
| 43 | return fClipRect.contains(SkIRect::MakeSize(canvas->getBaseLayerSize())); |
| 44 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 45 | |
| 46 | void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const override { |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 47 | if (!fClipRect.isEmpty()) { |
| 48 | canvas->save(); |
| 49 | canvas->clipIRect(fClipRect); |
| 50 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 51 | canvas->drawPicture(fContent.get()); |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 52 | if (!fClipRect.isEmpty()) { |
| 53 | canvas->restore(); |
| 54 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 55 | } |
| 56 | }; |
| 57 | |
| 58 | // Draws another layer. Stores the ID of the layer to draw and what command index on that |
| 59 | // layer should be current when the layer is drawn. The layer contents are updated to the |
| 60 | // stored command index before the layer is drawn. |
| 61 | struct MSKPPlayer::DrawLayerCmd : Cmd { |
| 62 | int fLayerId; |
| 63 | size_t fLayerCmdCnt; |
| 64 | SkRect fSrcRect; |
| 65 | SkRect fDstRect; |
| 66 | SkSamplingOptions fSampling; |
| 67 | SkCanvas::SrcRectConstraint fConstraint; |
| 68 | SkTLazy<SkPaint> fPaint; |
| 69 | |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 70 | bool isFullRedraw(SkCanvas* canvas) const override { return false; } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 71 | void draw(SkCanvas* canvas, const LayerMap&, LayerStateMap*) const override; |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 72 | int layerID() const override { return fLayerId; } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 73 | }; |
| 74 | |
| 75 | void MSKPPlayer::DrawLayerCmd::draw(SkCanvas* canvas, |
| 76 | const LayerMap& layerMap, |
| 77 | LayerStateMap* layerStateMap) const { |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 78 | const LayerCmds& layer = layerMap.at(fLayerId); |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 79 | LayerState* layerState = &(*layerStateMap)[fLayerId]; |
| 80 | if (!layerState->fSurface) { |
| 81 | layerState->fCurrCmd = 0; |
Brian Salomon | 31fddc3 | 2021-04-30 13:08:55 -0400 | [diff] [blame] | 82 | layerState->fSurface = MSKPPlayer::MakeSurfaceForLayer(layer, canvas); |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 83 | if (!layerState->fSurface) { |
| 84 | SkDebugf("Couldn't create surface for layer"); |
| 85 | return; |
| 86 | } |
| 87 | } |
| 88 | size_t cmd = layerState->fCurrCmd; |
| 89 | if (cmd > fLayerCmdCnt) { |
| 90 | // If the layer contains contents from later commands then replay from the beginning. |
| 91 | cmd = 0; |
| 92 | } |
| 93 | SkCanvas* layerCanvas = layerState->fSurface->getCanvas(); |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 94 | // Check if there is a full redraw between cmd and fLayerCmdCnt and if so jump to it and ensure |
| 95 | // we clear the canvas if starting from a full redraw. |
| 96 | for (size_t checkCmd = fLayerCmdCnt - 1; checkCmd > cmd; --checkCmd) { |
| 97 | if (layer.fCmds[checkCmd]->isFullRedraw(layerCanvas)) { |
| 98 | cmd = checkCmd; |
| 99 | break; |
| 100 | } |
| 101 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 102 | for (; cmd < fLayerCmdCnt; ++cmd) { |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 103 | if (cmd == 0 || layer.fCmds[cmd]->isFullRedraw(layerCanvas)) { |
| 104 | layerState->fSurface->getCanvas()->clear(SK_ColorTRANSPARENT); |
| 105 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 106 | layer.fCmds[cmd]->draw(layerCanvas, layerMap, layerStateMap); |
| 107 | } |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 108 | layerState->fCurrCmd = fLayerCmdCnt; |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 109 | const SkPaint* paint = fPaint.isValid() ? fPaint.get() : nullptr; |
| 110 | canvas->drawImageRect(layerState->fSurface->makeImageSnapshot(), |
| 111 | fSrcRect, |
| 112 | fDstRect, |
| 113 | fSampling, |
| 114 | paint, |
| 115 | fConstraint); |
| 116 | } |
| 117 | |
| 118 | /////////////////////////////////////////////////////////////////////////////// |
| 119 | |
| 120 | class MSKPPlayer::CmdRecordCanvas : public SkCanvasVirtualEnforcer<SkCanvas> { |
| 121 | public: |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 122 | CmdRecordCanvas(LayerCmds* dst, LayerMap* offscreenLayers, const SkIRect* clipRect = nullptr) |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 123 | : fDst(dst), fOffscreenLayers(offscreenLayers) { |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 124 | if (clipRect) { |
| 125 | fClipRect = *clipRect; |
| 126 | } |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 127 | fRecorder.beginRecording(SkRect::Make(dst->fDimensions)); |
| 128 | } |
| 129 | ~CmdRecordCanvas() override { this->recordPicCmd(); } |
| 130 | |
| 131 | protected: |
| 132 | void onDrawPaint(const SkPaint& paint) override { |
| 133 | fRecorder.getRecordingCanvas()->drawPaint(paint); |
| 134 | } |
| 135 | |
| 136 | void onDrawBehind(const SkPaint& paint) override { |
| 137 | SkCanvasPriv::DrawBehind(fRecorder.getRecordingCanvas(), paint); |
| 138 | } |
| 139 | |
| 140 | void onDrawRect(const SkRect& rect, const SkPaint& paint) override { |
| 141 | fRecorder.getRecordingCanvas()->drawRect(rect, paint); |
| 142 | } |
| 143 | |
| 144 | void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) override { |
| 145 | fRecorder.getRecordingCanvas()->drawRRect(rrect, paint); |
| 146 | } |
| 147 | |
| 148 | void onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) override { |
| 149 | fRecorder.getRecordingCanvas()->drawDRRect(outer, inner, paint); |
| 150 | } |
| 151 | |
| 152 | void onDrawOval(const SkRect& rect, const SkPaint& paint) override { |
| 153 | fRecorder.getRecordingCanvas()->drawOval(rect, paint); |
| 154 | } |
| 155 | |
| 156 | void onDrawArc(const SkRect& rect, |
| 157 | SkScalar startAngle, |
| 158 | SkScalar sweepAngle, |
| 159 | bool useCenter, |
| 160 | const SkPaint& paint) override { |
| 161 | fRecorder.getRecordingCanvas()->drawArc(rect, startAngle, sweepAngle, useCenter, paint); |
| 162 | } |
| 163 | |
| 164 | void onDrawPath(const SkPath& path, const SkPaint& paint) override { |
| 165 | fRecorder.getRecordingCanvas()->drawPath(path, paint); |
| 166 | } |
| 167 | |
| 168 | void onDrawRegion(const SkRegion& region, const SkPaint& paint) override { |
| 169 | fRecorder.getRecordingCanvas()->drawRegion(region, paint); |
| 170 | } |
| 171 | |
| 172 | void onDrawTextBlob(const SkTextBlob* blob, |
| 173 | SkScalar x, |
| 174 | SkScalar y, |
| 175 | const SkPaint& paint) override { |
| 176 | fRecorder.getRecordingCanvas()->drawTextBlob(blob, x, y, paint); |
| 177 | } |
| 178 | |
| 179 | void onDrawPatch(const SkPoint cubics[12], |
| 180 | const SkColor colors[4], |
| 181 | const SkPoint texCoords[4], |
| 182 | SkBlendMode mode, |
| 183 | const SkPaint& paint) override { |
| 184 | fRecorder.getRecordingCanvas()->drawPatch(cubics, colors, texCoords, mode, paint); |
| 185 | } |
| 186 | |
| 187 | void onDrawPoints(SkCanvas::PointMode mode, |
| 188 | size_t count, |
| 189 | const SkPoint pts[], |
| 190 | const SkPaint& paint) override { |
| 191 | fRecorder.getRecordingCanvas()->drawPoints(mode, count, pts, paint); |
| 192 | } |
| 193 | |
| 194 | void onDrawImage2(const SkImage* image, |
| 195 | SkScalar dx, |
| 196 | SkScalar dy, |
| 197 | const SkSamplingOptions& sampling, |
| 198 | const SkPaint* paint) override { |
| 199 | fRecorder.getRecordingCanvas()->drawImage(image, dx, dy, sampling, paint); |
| 200 | } |
| 201 | |
| 202 | void onDrawImageRect2(const SkImage* image, |
| 203 | const SkRect& src, |
| 204 | const SkRect& dst, |
| 205 | const SkSamplingOptions& sampling, |
| 206 | const SkPaint* paint, |
| 207 | SrcRectConstraint constraint) override { |
| 208 | if (fNextDrawImageFromLayerID != -1) { |
| 209 | this->recordPicCmd(); |
| 210 | auto drawLayer = std::make_unique<DrawLayerCmd>(); |
| 211 | drawLayer->fLayerId = fNextDrawImageFromLayerID; |
| 212 | drawLayer->fLayerCmdCnt = fOffscreenLayers->at(fNextDrawImageFromLayerID).fCmds.size(); |
| 213 | drawLayer->fSrcRect = src; |
| 214 | drawLayer->fDstRect = dst; |
| 215 | drawLayer->fSampling = sampling; |
| 216 | drawLayer->fConstraint = constraint; |
| 217 | if (paint) { |
| 218 | drawLayer->fPaint.init(*paint); |
| 219 | } |
| 220 | fDst->fCmds.push_back(std::move(drawLayer)); |
| 221 | fNextDrawImageFromLayerID = -1; |
| 222 | return; |
| 223 | } |
| 224 | fRecorder.getRecordingCanvas()->drawImageRect(image, src, dst, sampling, paint, constraint); |
| 225 | } |
| 226 | |
| 227 | void onDrawImageLattice2(const SkImage* image, |
| 228 | const Lattice& lattice, |
| 229 | const SkRect& dst, |
| 230 | SkFilterMode mode, |
| 231 | const SkPaint* paint) override { |
| 232 | fRecorder.getRecordingCanvas()->drawImageLattice(image, lattice, dst, mode, paint); |
| 233 | } |
| 234 | |
| 235 | void onDrawAtlas2(const SkImage* image, |
| 236 | const SkRSXform rsxForms[], |
| 237 | const SkRect src[], |
| 238 | const SkColor colors[], |
| 239 | int count, |
| 240 | SkBlendMode mode, |
| 241 | const SkSamplingOptions& sampling, |
| 242 | const SkRect* cull, |
| 243 | const SkPaint* paint) override { |
| 244 | fRecorder.getRecordingCanvas()->drawAtlas(image, |
| 245 | rsxForms, |
| 246 | src, |
| 247 | colors, |
| 248 | count, |
| 249 | mode, |
| 250 | sampling, |
| 251 | cull, |
| 252 | paint); |
| 253 | } |
| 254 | |
| 255 | void onDrawEdgeAAImageSet2(const ImageSetEntry imageSet[], |
| 256 | int count, |
| 257 | const SkPoint dstClips[], |
| 258 | const SkMatrix preViewMatrices[], |
| 259 | const SkSamplingOptions& sampling, |
| 260 | const SkPaint* paint, |
| 261 | SrcRectConstraint constraint) override { |
| 262 | fRecorder.getRecordingCanvas()->experimental_DrawEdgeAAImageSet(imageSet, |
| 263 | count, |
| 264 | dstClips, |
| 265 | preViewMatrices, |
| 266 | sampling, |
| 267 | paint, |
| 268 | constraint); |
| 269 | } |
| 270 | |
| 271 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| 272 | void onDrawEdgeAAQuad(const SkRect& rect, |
| 273 | const SkPoint clip[4], |
| 274 | SkCanvas::QuadAAFlags aaFlags, |
| 275 | const SkColor4f& color, |
| 276 | SkBlendMode mode) override {} |
| 277 | #else |
| 278 | void onDrawEdgeAAQuad(const SkRect& rect, |
| 279 | const SkPoint clip[4], |
| 280 | SkCanvas::QuadAAFlags aaFlags, |
| 281 | const SkColor4f& color, |
| 282 | SkBlendMode mode) override { |
| 283 | fRecorder.getRecordingCanvas()->experimental_DrawEdgeAAQuad(rect, |
| 284 | clip, |
| 285 | aaFlags, |
| 286 | color, |
| 287 | mode); |
| 288 | } |
| 289 | #endif |
| 290 | |
| 291 | void onDrawAnnotation(const SkRect& rect, const char key[], SkData* value) override { |
| 292 | static constexpr char kOffscreenLayerDraw[] = "OffscreenLayerDraw"; |
| 293 | static constexpr char kSurfaceID[] = "SurfaceID"; |
| 294 | SkTArray<SkString> tokens; |
| 295 | SkStrSplit(key, "|", kStrict_SkStrSplitMode, &tokens); |
| 296 | if (tokens.size() == 2) { |
| 297 | if (tokens[0].equals(kOffscreenLayerDraw)) { |
| 298 | // Indicates that the next drawPicture command contains the SkPicture to render |
| 299 | // to the layer identified by the ID. 'rect' indicates the dirty area to update |
| 300 | // (and indicates the layer size if this command is introducing a new layer id). |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 301 | fNextDrawPictureToLayerID = std::stoi(tokens[1].c_str()); |
| 302 | fNextDrawPictureToLayerClipRect = rect.roundOut(); |
| 303 | if (fOffscreenLayers->find(fNextDrawPictureToLayerID) == fOffscreenLayers->end()) { |
| 304 | SkASSERT(fNextDrawPictureToLayerClipRect.left() == 0 && |
| 305 | fNextDrawPictureToLayerClipRect.top() == 0); |
| 306 | (*fOffscreenLayers)[fNextDrawPictureToLayerID].fDimensions = |
| 307 | fNextDrawPictureToLayerClipRect.size(); |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 308 | } |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 309 | // The next draw picture will notice that fNextDrawPictureToLayerID is set and |
| 310 | // redirect the picture to the offscreen layer. |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 311 | return; |
| 312 | } else if (tokens[0].equals(kSurfaceID)) { |
| 313 | // Indicates that the following drawImageRect should draw an offscreen layer |
| 314 | // to this layer. |
| 315 | fNextDrawImageFromLayerID = std::stoi(tokens[1].c_str()); |
| 316 | return; |
| 317 | } |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | void onDrawShadowRec(const SkPath& path, const SkDrawShadowRec& rec) override { |
| 322 | fRecorder.getRecordingCanvas()->private_draw_shadow_rec(path, rec); |
| 323 | } |
| 324 | |
| 325 | void onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) override { |
| 326 | fRecorder.getRecordingCanvas()->drawDrawable(drawable, matrix); |
| 327 | } |
| 328 | |
| 329 | void onDrawPicture(const SkPicture* picture, |
| 330 | const SkMatrix* matrix, |
| 331 | const SkPaint* paint) override { |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 332 | if (fNextDrawPictureToLayerID != -1) { |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 333 | SkASSERT(!matrix); |
| 334 | SkASSERT(!paint); |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 335 | LayerCmds* layer = &fOffscreenLayers->at(fNextDrawPictureToLayerID); |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 336 | CmdRecordCanvas sc(layer, fOffscreenLayers, &fNextDrawPictureToLayerClipRect); |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 337 | picture->playback(&sc); |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 338 | fNextDrawPictureToLayerID = -1; |
| 339 | fNextDrawPictureToLayerClipRect = SkIRect::MakeEmpty(); |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 340 | return; |
| 341 | } |
| 342 | if (paint) { |
| 343 | this->saveLayer(nullptr, paint); |
| 344 | } |
| 345 | if (matrix) { |
| 346 | this->save(); |
| 347 | this->concat(*matrix); |
| 348 | } |
| 349 | |
| 350 | picture->playback(this); |
| 351 | |
| 352 | if (matrix) { |
| 353 | this->restore(); |
| 354 | } |
| 355 | if (paint) { |
| 356 | this->restore(); |
| 357 | } |
| 358 | fRecorder.getRecordingCanvas()->drawPicture(picture, matrix, paint); |
| 359 | } |
| 360 | |
| 361 | private: |
| 362 | void recordPicCmd() { |
| 363 | auto cmd = std::make_unique<PicCmd>(); |
| 364 | cmd->fContent = fRecorder.finishRecordingAsPicture(); |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 365 | cmd->fClipRect = fClipRect; |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 366 | if (cmd->fContent) { |
| 367 | fDst->fCmds.push_back(std::move(cmd)); |
| 368 | } |
| 369 | // Set up to accumulate again. |
| 370 | fRecorder.beginRecording(SkRect::Make(fDst->fDimensions)); |
| 371 | } |
| 372 | |
| 373 | SkPictureRecorder fRecorder; // accumulates draws until we draw an offscreen into this layer. |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 374 | LayerCmds* fDst = nullptr; |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 375 | SkIRect fClipRect = SkIRect::MakeEmpty(); |
| 376 | int fNextDrawPictureToLayerID = -1; |
| 377 | SkIRect fNextDrawPictureToLayerClipRect = SkIRect::MakeEmpty(); |
| 378 | int fNextDrawImageFromLayerID = -1; |
| 379 | LayerMap* fOffscreenLayers = nullptr; |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 380 | }; |
| 381 | |
| 382 | /////////////////////////////////////////////////////////////////////////////// |
| 383 | |
| 384 | std::unique_ptr<MSKPPlayer> MSKPPlayer::Make(SkStreamSeekable* stream) { |
| 385 | auto deserialContext = std::make_unique<SkSharingDeserialContext>(); |
| 386 | SkDeserialProcs procs; |
| 387 | procs.fImageProc = SkSharingDeserialContext::deserializeImage; |
| 388 | procs.fImageCtx = deserialContext.get(); |
| 389 | |
| 390 | int pageCount = SkMultiPictureDocumentReadPageCount(stream); |
| 391 | if (!pageCount) { |
| 392 | return nullptr; |
| 393 | } |
| 394 | std::vector<SkDocumentPage> pages(pageCount); |
| 395 | if (!SkMultiPictureDocumentRead(stream, pages.data(), pageCount, &procs)) { |
| 396 | return nullptr; |
| 397 | } |
| 398 | std::unique_ptr<MSKPPlayer> result(new MSKPPlayer); |
| 399 | result->fRootLayers.reserve(pages.size()); |
| 400 | for (const auto& page : pages) { |
| 401 | SkISize dims = {SkScalarCeilToInt(page.fSize.width()), |
| 402 | SkScalarCeilToInt(page.fSize.height())}; |
| 403 | result->fRootLayers.emplace_back(); |
| 404 | result->fRootLayers.back().fDimensions = dims; |
| 405 | result->fMaxDimensions.fWidth = std::max(dims.width() , result->fMaxDimensions.width() ); |
| 406 | result->fMaxDimensions.fHeight = std::max(dims.height(), result->fMaxDimensions.height()); |
| 407 | CmdRecordCanvas sc(&result->fRootLayers.back(), &result->fOffscreenLayers); |
| 408 | page.fPicture->playback(&sc); |
| 409 | } |
| 410 | return result; |
| 411 | } |
| 412 | |
| 413 | MSKPPlayer::~MSKPPlayer() = default; |
| 414 | |
| 415 | SkISize MSKPPlayer::frameDimensions(int i) const { |
| 416 | if (i < 0 || i >= this->numFrames()) { |
| 417 | return {-1, -1}; |
| 418 | } |
| 419 | return fRootLayers[i].fDimensions; |
| 420 | } |
| 421 | |
| 422 | bool MSKPPlayer::playFrame(SkCanvas* canvas, int i) { |
| 423 | if (i < 0 || i >= this->numFrames()) { |
| 424 | return false; |
| 425 | } |
| 426 | |
| 427 | // Find the first offscreen layer that has a valid surface. If it's recording context |
| 428 | // differs from the passed canvas's then reset all the layers. Playback will |
| 429 | // automatically allocate new surfaces for offscreen layers as they're encountered. |
| 430 | for (const auto& ols : fOffscreenLayerStates) { |
| 431 | const LayerState& state = ols.second; |
| 432 | if (state.fSurface) { |
| 433 | if (state.fSurface->recordingContext() != canvas->recordingContext()) { |
| 434 | this->resetLayers(); |
| 435 | } |
| 436 | break; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | // Replay all the commands for this frame to the caller's canvas. |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 441 | const LayerCmds& layer = fRootLayers[i]; |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 442 | for (const auto& cmd : layer.fCmds) { |
| 443 | cmd->draw(canvas, fOffscreenLayers, &fOffscreenLayerStates); |
| 444 | } |
| 445 | return true; |
| 446 | } |
| 447 | |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 448 | sk_sp<SkSurface> MSKPPlayer::MakeSurfaceForLayer(const LayerCmds& layer, SkCanvas* rootCanvas) { |
Brian Salomon | 31fddc3 | 2021-04-30 13:08:55 -0400 | [diff] [blame] | 449 | // Assume layer has same surface props and info as this (mskp doesn't currently record this |
| 450 | // data). |
| 451 | SkSurfaceProps props; |
| 452 | rootCanvas->getProps(&props); |
| 453 | return rootCanvas->makeSurface(rootCanvas->imageInfo().makeDimensions(layer.fDimensions), |
| 454 | &props); |
| 455 | } |
| 456 | |
Brian Salomon | 06c9e29 | 2021-04-29 14:10:23 -0400 | [diff] [blame] | 457 | void MSKPPlayer::resetLayers() { fOffscreenLayerStates.clear(); } |
Brian Salomon | 31fddc3 | 2021-04-30 13:08:55 -0400 | [diff] [blame] | 458 | |
| 459 | void MSKPPlayer::rewindLayers() { |
| 460 | for (auto& [id, state] : fOffscreenLayerStates) { |
| 461 | state.fCurrCmd = -1; |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | void MSKPPlayer::allocateLayers(SkCanvas* canvas) { |
| 466 | // Iterate over layers not states as states are lazily created in playback but here we want to |
| 467 | // create any that don't already exist. |
| 468 | for (auto& [id, layer] : fOffscreenLayers) { |
| 469 | LayerState& state = fOffscreenLayerStates[id]; |
| 470 | if (!state.fSurface || state.fSurface->recordingContext() != canvas->recordingContext()) { |
| 471 | state.fCurrCmd = -1; |
| 472 | state.fSurface = MakeSurfaceForLayer(fOffscreenLayers[id], canvas); |
| 473 | } |
| 474 | } |
| 475 | } |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 476 | |
| 477 | std::vector<int> MSKPPlayer::layerIDs(int frame) const { |
| 478 | std::vector<int> result; |
| 479 | if (frame < 0) { |
| 480 | result.reserve(fOffscreenLayers.size()); |
| 481 | for (auto& [id, _] : fOffscreenLayers) { |
| 482 | result.push_back(id); |
| 483 | } |
| 484 | return result; |
| 485 | } |
| 486 | if (frame < static_cast<int>(fRootLayers.size())) { |
| 487 | this->collectReferencedLayers(fRootLayers[frame], &result); |
| 488 | } |
| 489 | return result; |
| 490 | } |
| 491 | |
| 492 | sk_sp<SkImage> MSKPPlayer::layerSnapshot(int layerID) const { |
| 493 | auto iter = fOffscreenLayerStates.find(layerID); |
| 494 | if (iter == fOffscreenLayerStates.end() || !iter->second.fSurface) { |
| 495 | return nullptr; |
| 496 | } |
| 497 | return iter->second.fSurface->makeImageSnapshot(); |
| 498 | } |
| 499 | |
Brian Osman | 68556bc | 2021-07-30 15:24:22 -0400 | [diff] [blame] | 500 | void MSKPPlayer::collectReferencedLayers(const LayerCmds& layer, std::vector<int>* out) const { |
Brian Salomon | 33ec6113 | 2021-05-12 12:03:02 -0400 | [diff] [blame] | 501 | for (const auto& cmd : layer.fCmds) { |
| 502 | if (int id = cmd->layerID(); id >= 0) { |
| 503 | // Linear, but we'd need to have a lot of layers to actually care. |
| 504 | if (std::find(out->begin(), out->end(), id) == out->end()) { |
| 505 | out->push_back(id); |
| 506 | auto iter = fOffscreenLayers.find(id); |
| 507 | SkASSERT(iter != fOffscreenLayers.end()); |
| 508 | this->collectReferencedLayers(iter->second, out); |
| 509 | } |
| 510 | } |
| 511 | } |
| 512 | } |