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      1 /*
      2  * Copyright 2014 Google Inc.
      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 "SkBigPicture.h"
      9 #include "SkCanvasPriv.h"
     10 #include "SkPatchUtils.h"
     11 #include "SkPicture.h"
     12 #include "SkPictureUtils.h"
     13 #include "SkRecorder.h"
     14 
     15 //#define WRAP_BITMAP_AS_IMAGE
     16 
     17 SkDrawableList::~SkDrawableList() {
     18     fArray.unrefAll();
     19 }
     20 
     21 SkBigPicture::SnapshotArray* SkDrawableList::newDrawableSnapshot() {
     22     const int count = fArray.count();
     23     if (0 == count) {
     24         return nullptr;
     25     }
     26     SkAutoTMalloc<const SkPicture*> pics(count);
     27     for (int i = 0; i < count; ++i) {
     28         pics[i] = fArray[i]->newPictureSnapshot();
     29     }
     30     return new SkBigPicture::SnapshotArray(pics.detach(), count);
     31 }
     32 
     33 void SkDrawableList::append(SkDrawable* drawable) {
     34     *fArray.append() = SkRef(drawable);
     35 }
     36 
     37 ///////////////////////////////////////////////////////////////////////////////////////////////
     38 
     39 SkRecorder::SkRecorder(SkRecord* record, int width, int height, SkMiniRecorder* mr)
     40     : SkCanvas(SkIRect::MakeWH(width, height), SkCanvas::kConservativeRasterClip_InitFlag)
     41     , fDrawPictureMode(Record_DrawPictureMode)
     42     , fApproxBytesUsedBySubPictures(0)
     43     , fRecord(record)
     44     , fMiniRecorder(mr) {}
     45 
     46 SkRecorder::SkRecorder(SkRecord* record, const SkRect& bounds, SkMiniRecorder* mr)
     47     : SkCanvas(bounds.roundOut(), SkCanvas::kConservativeRasterClip_InitFlag)
     48     , fDrawPictureMode(Record_DrawPictureMode)
     49     , fApproxBytesUsedBySubPictures(0)
     50     , fRecord(record)
     51     , fMiniRecorder(mr) {}
     52 
     53 void SkRecorder::reset(SkRecord* record, const SkRect& bounds,
     54                        DrawPictureMode dpm, SkMiniRecorder* mr) {
     55     this->forgetRecord();
     56     fDrawPictureMode = dpm;
     57     fRecord = record;
     58     this->resetForNextPicture(bounds.roundOut());
     59     fMiniRecorder = mr;
     60 }
     61 
     62 void SkRecorder::forgetRecord() {
     63     fDrawableList.reset(nullptr);
     64     fApproxBytesUsedBySubPictures = 0;
     65     fRecord = nullptr;
     66 }
     67 
     68 // To make appending to fRecord a little less verbose.
     69 #define APPEND(T, ...)             \
     70     if (fMiniRecorder) {           \
     71         this->flushMiniRecorder(); \
     72     }                              \
     73     new (fRecord->append<SkRecords::T>()) SkRecords::T{__VA_ARGS__}
     74 
     75 #define TRY_MINIRECORDER(method, ...)                       \
     76     if (fMiniRecorder && fMiniRecorder->method(__VA_ARGS__)) { return; }
     77 
     78 // For methods which must call back into SkCanvas.
     79 #define INHERITED(method, ...) this->SkCanvas::method(__VA_ARGS__)
     80 
     81 // Use copy() only for optional arguments, to be copied if present or skipped if not.
     82 // (For most types we just pass by value and let copy constructors do their thing.)
     83 template <typename T>
     84 T* SkRecorder::copy(const T* src) {
     85     if (nullptr == src) {
     86         return nullptr;
     87     }
     88     return new (fRecord->alloc<T>()) T(*src);
     89 }
     90 
     91 // This copy() is for arrays.
     92 // It will work with POD or non-POD, though currently we only use it for POD.
     93 template <typename T>
     94 T* SkRecorder::copy(const T src[], size_t count) {
     95     if (nullptr == src) {
     96         return nullptr;
     97     }
     98     T* dst = fRecord->alloc<T>(count);
     99     for (size_t i = 0; i < count; i++) {
    100         new (dst + i) T(src[i]);
    101     }
    102     return dst;
    103 }
    104 
    105 // Specialization for copying strings, using memcpy.
    106 // This measured around 2x faster for copying code points,
    107 // but I found no corresponding speedup for other arrays.
    108 template <>
    109 char* SkRecorder::copy(const char src[], size_t count) {
    110     if (nullptr == src) {
    111         return nullptr;
    112     }
    113     char* dst = fRecord->alloc<char>(count);
    114     memcpy(dst, src, count);
    115     return dst;
    116 }
    117 
    118 // As above, assuming and copying a terminating \0.
    119 template <>
    120 char* SkRecorder::copy(const char* src) {
    121     return this->copy(src, strlen(src)+1);
    122 }
    123 
    124 void SkRecorder::flushMiniRecorder() {
    125     if (fMiniRecorder) {
    126         SkMiniRecorder* mr = fMiniRecorder;
    127         fMiniRecorder = nullptr;  // Needs to happen before flushAndReset() or we recurse forever.
    128         mr->flushAndReset(this);
    129     }
    130 }
    131 
    132 void SkRecorder::onDrawPaint(const SkPaint& paint) {
    133     APPEND(DrawPaint, paint);
    134 }
    135 
    136 void SkRecorder::onDrawPoints(PointMode mode,
    137                               size_t count,
    138                               const SkPoint pts[],
    139                               const SkPaint& paint) {
    140     APPEND(DrawPoints, paint, mode, SkToUInt(count), this->copy(pts, count));
    141 }
    142 
    143 void SkRecorder::onDrawRect(const SkRect& rect, const SkPaint& paint) {
    144     TRY_MINIRECORDER(drawRect, rect, paint);
    145     APPEND(DrawRect, paint, rect);
    146 }
    147 
    148 void SkRecorder::onDrawOval(const SkRect& oval, const SkPaint& paint) {
    149     APPEND(DrawOval, paint, oval);
    150 }
    151 
    152 void SkRecorder::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
    153     APPEND(DrawRRect, paint, rrect);
    154 }
    155 
    156 void SkRecorder::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) {
    157     APPEND(DrawDRRect, paint, outer, inner);
    158 }
    159 
    160 void SkRecorder::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) {
    161     if (fDrawPictureMode == Record_DrawPictureMode) {
    162         if (!fDrawableList) {
    163             fDrawableList.reset(new SkDrawableList);
    164         }
    165         fDrawableList->append(drawable);
    166         APPEND(DrawDrawable, this->copy(matrix), drawable->getBounds(), fDrawableList->count() - 1);
    167     } else {
    168         SkASSERT(fDrawPictureMode == Playback_DrawPictureMode);
    169         drawable->draw(this, matrix);
    170     }
    171 }
    172 
    173 void SkRecorder::onDrawPath(const SkPath& path, const SkPaint& paint) {
    174     TRY_MINIRECORDER(drawPath, path, paint);
    175     APPEND(DrawPath, paint, path);
    176 }
    177 
    178 void SkRecorder::onDrawBitmap(const SkBitmap& bitmap,
    179                               SkScalar left,
    180                               SkScalar top,
    181                               const SkPaint* paint) {
    182 #ifdef WRAP_BITMAP_AS_IMAGE
    183     SkAutoTUnref<SkImage> image(SkImage::NewFromBitmap(bitmap));
    184     if (image) {
    185         this->onDrawImage(image, left, top, paint);
    186     }
    187 #else
    188     APPEND(DrawBitmap, this->copy(paint), bitmap, left, top);
    189 #endif
    190 }
    191 
    192 void SkRecorder::onDrawBitmapRect(const SkBitmap& bitmap,
    193                                   const SkRect* src,
    194                                   const SkRect& dst,
    195                                   const SkPaint* paint,
    196                                   SrcRectConstraint constraint) {
    197 #ifdef WRAP_BITMAP_AS_IMAGE
    198     // TODO: need a way to support the flags for images...
    199     SkAutoTUnref<SkImage> image(SkImage::NewFromBitmap(bitmap));
    200     if (image) {
    201         this->onDrawImageRect(image, src, dst, paint);
    202     }
    203 #else
    204     TRY_MINIRECORDER(drawBitmapRect, bitmap, src, dst, paint, constraint);
    205     if (kFast_SrcRectConstraint == constraint) {
    206         APPEND(DrawBitmapRectFast, this->copy(paint), bitmap, this->copy(src), dst);
    207         return;
    208     }
    209     SkASSERT(kStrict_SrcRectConstraint == constraint);
    210     APPEND(DrawBitmapRect, this->copy(paint), bitmap, this->copy(src), dst);
    211 #endif
    212 }
    213 
    214 void SkRecorder::onDrawBitmapNine(const SkBitmap& bitmap,
    215                                   const SkIRect& center,
    216                                   const SkRect& dst,
    217                                   const SkPaint* paint) {
    218 #ifdef WRAP_BITMAP_AS_IMAGE
    219     SkAutoTUnref<SkImage> image(SkImage::NewFromBitmap(bitmap));
    220     if (image) {
    221         this->onDrawImageNine(image, center, dst, paint);
    222     }
    223 #else
    224     APPEND(DrawBitmapNine, this->copy(paint), bitmap, center, dst);
    225 #endif
    226 }
    227 
    228 void SkRecorder::onDrawImage(const SkImage* image, SkScalar left, SkScalar top,
    229                              const SkPaint* paint) {
    230     APPEND(DrawImage, this->copy(paint), image, left, top);
    231 }
    232 
    233 void SkRecorder::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
    234                                  const SkPaint* paint, SrcRectConstraint constraint) {
    235     APPEND(DrawImageRect, this->copy(paint), image, this->copy(src), dst, constraint);
    236 }
    237 
    238 void SkRecorder::onDrawImageNine(const SkImage* image, const SkIRect& center,
    239                                  const SkRect& dst, const SkPaint* paint) {
    240     APPEND(DrawImageNine, this->copy(paint), image, center, dst);
    241 }
    242 
    243 void SkRecorder::onDrawText(const void* text, size_t byteLength,
    244                             SkScalar x, SkScalar y, const SkPaint& paint) {
    245     APPEND(DrawText,
    246            paint, this->copy((const char*)text, byteLength), byteLength, x, y);
    247 }
    248 
    249 void SkRecorder::onDrawPosText(const void* text, size_t byteLength,
    250                                const SkPoint pos[], const SkPaint& paint) {
    251     const int points = paint.countText(text, byteLength);
    252     APPEND(DrawPosText,
    253            paint,
    254            this->copy((const char*)text, byteLength),
    255            byteLength,
    256            this->copy(pos, points));
    257 }
    258 
    259 void SkRecorder::onDrawPosTextH(const void* text, size_t byteLength,
    260                                 const SkScalar xpos[], SkScalar constY, const SkPaint& paint) {
    261     const int points = paint.countText(text, byteLength);
    262     APPEND(DrawPosTextH,
    263            paint,
    264            this->copy((const char*)text, byteLength),
    265            SkToUInt(byteLength),
    266            constY,
    267            this->copy(xpos, points));
    268 }
    269 
    270 void SkRecorder::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
    271                                   const SkMatrix* matrix, const SkPaint& paint) {
    272     APPEND(DrawTextOnPath,
    273            paint,
    274            this->copy((const char*)text, byteLength),
    275            byteLength,
    276            path,
    277            matrix ? *matrix : SkMatrix::I());
    278 }
    279 
    280 void SkRecorder::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
    281                                 const SkPaint& paint) {
    282     TRY_MINIRECORDER(drawTextBlob, blob, x, y, paint);
    283     APPEND(DrawTextBlob, paint, blob, x, y);
    284 }
    285 
    286 void SkRecorder::onDrawPicture(const SkPicture* pic, const SkMatrix* matrix, const SkPaint* paint) {
    287     if (fDrawPictureMode == Record_DrawPictureMode) {
    288         fApproxBytesUsedBySubPictures += SkPictureUtils::ApproximateBytesUsed(pic);
    289         APPEND(DrawPicture, this->copy(paint), pic, matrix ? *matrix : SkMatrix::I());
    290     } else {
    291         SkASSERT(fDrawPictureMode == Playback_DrawPictureMode);
    292         SkAutoCanvasMatrixPaint acmp(this, matrix, paint, pic->cullRect());
    293         pic->playback(this);
    294     }
    295 }
    296 
    297 void SkRecorder::onDrawVertices(VertexMode vmode,
    298                                 int vertexCount, const SkPoint vertices[],
    299                                 const SkPoint texs[], const SkColor colors[],
    300                                 SkXfermode* xmode,
    301                                 const uint16_t indices[], int indexCount, const SkPaint& paint) {
    302     APPEND(DrawVertices, paint,
    303                          vmode,
    304                          vertexCount,
    305                          this->copy(vertices, vertexCount),
    306                          texs ? this->copy(texs, vertexCount) : nullptr,
    307                          colors ? this->copy(colors, vertexCount) : nullptr,
    308                          xmode,
    309                          this->copy(indices, indexCount),
    310                          indexCount);
    311 }
    312 
    313 void SkRecorder::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
    314                              const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) {
    315     APPEND(DrawPatch, paint,
    316            cubics ? this->copy(cubics, SkPatchUtils::kNumCtrlPts) : nullptr,
    317            colors ? this->copy(colors, SkPatchUtils::kNumCorners) : nullptr,
    318            texCoords ? this->copy(texCoords, SkPatchUtils::kNumCorners) : nullptr,
    319            xmode);
    320 }
    321 
    322 void SkRecorder::onDrawAtlas(const SkImage* atlas, const SkRSXform xform[], const SkRect tex[],
    323                              const SkColor colors[], int count, SkXfermode::Mode mode,
    324                              const SkRect* cull, const SkPaint* paint) {
    325     APPEND(DrawAtlas, this->copy(paint),
    326            atlas,
    327            this->copy(xform, count),
    328            this->copy(tex, count),
    329            this->copy(colors, count),
    330            count,
    331            mode,
    332            this->copy(cull));
    333 }
    334 
    335 void SkRecorder::willSave() {
    336     APPEND(Save);
    337 }
    338 
    339 SkCanvas::SaveLayerStrategy SkRecorder::getSaveLayerStrategy(const SaveLayerRec& rec) {
    340     APPEND(SaveLayer,
    341            this->copy(rec.fBounds), this->copy(rec.fPaint), rec.fBackdrop, rec.fSaveLayerFlags);
    342     return SkCanvas::kNoLayer_SaveLayerStrategy;
    343 }
    344 
    345 void SkRecorder::didRestore() {
    346     APPEND(Restore, this->devBounds(), this->getTotalMatrix());
    347 }
    348 
    349 void SkRecorder::didConcat(const SkMatrix& matrix) {
    350     APPEND(Concat, matrix);
    351 }
    352 
    353 void SkRecorder::didSetMatrix(const SkMatrix& matrix) {
    354     APPEND(SetMatrix, matrix);
    355 }
    356 
    357 void SkRecorder::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
    358     INHERITED(onClipRect, rect, op, edgeStyle);
    359     SkRecords::RegionOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle);
    360     APPEND(ClipRect, this->devBounds(), rect, opAA);
    361 }
    362 
    363 void SkRecorder::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
    364     INHERITED(onClipRRect, rrect, op, edgeStyle);
    365     SkRecords::RegionOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle);
    366     APPEND(ClipRRect, this->devBounds(), rrect, opAA);
    367 }
    368 
    369 void SkRecorder::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
    370     INHERITED(onClipPath, path, op, edgeStyle);
    371     SkRecords::RegionOpAndAA opAA(op, kSoft_ClipEdgeStyle == edgeStyle);
    372     APPEND(ClipPath, this->devBounds(), path, opAA);
    373 }
    374 
    375 void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
    376     INHERITED(onClipRegion, deviceRgn, op);
    377     APPEND(ClipRegion, this->devBounds(), deviceRgn, op);
    378 }
    379 
    380