| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkCanvas.h" |
| #include "SkPatchUtils.h" |
| #include "SkPictureData.h" |
| #include "SkPicturePlayback.h" |
| #include "SkPictureRecord.h" |
| #include "SkReader32.h" |
| #include "SkRSXform.h" |
| #include "SkTextBlob.h" |
| #include "SkTDArray.h" |
| #include "SkTypes.h" |
| |
| // matches old SkCanvas::SaveFlags |
| enum LegacySaveFlags { |
| kHasAlphaLayer_LegacySaveFlags = 0x04, |
| kClipToLayer_LegacySaveFlags = 0x10, |
| }; |
| |
| SkCanvas::SaveLayerFlags SkCanvas::LegacySaveFlagsToSaveLayerFlags(uint32_t flags) { |
| uint32_t layerFlags = 0; |
| |
| if (0 == (flags & kClipToLayer_LegacySaveFlags)) { |
| layerFlags |= SkCanvas::kDontClipToLayer_PrivateSaveLayerFlag; |
| } |
| if (0 == (flags & kHasAlphaLayer_LegacySaveFlags)) { |
| layerFlags |= kIsOpaque_SaveLayerFlag; |
| } |
| return layerFlags; |
| } |
| |
| /* |
| * Read the next op code and chunk size from 'reader'. The returned size |
| * is the entire size of the chunk (including the opcode). Thus, the |
| * offset just prior to calling ReadOpAndSize + 'size' is the offset |
| * to the next chunk's op code. This also means that the size of a chunk |
| * with no arguments (just an opcode) will be 4. |
| */ |
| DrawType SkPicturePlayback::ReadOpAndSize(SkReader32* reader, uint32_t* size) { |
| uint32_t temp = reader->readInt(); |
| uint32_t op; |
| if (((uint8_t)temp) == temp) { |
| // old skp file - no size information |
| op = temp; |
| *size = 0; |
| } else { |
| UNPACK_8_24(temp, op, *size); |
| if (MASK_24 == *size) { |
| *size = reader->readInt(); |
| } |
| } |
| return (DrawType)op; |
| } |
| |
| |
| static const SkRect* get_rect_ptr(SkReader32* reader) { |
| if (reader->readBool()) { |
| return &reader->skipT<SkRect>(); |
| } else { |
| return nullptr; |
| } |
| } |
| |
| class TextContainer { |
| public: |
| size_t length() { return fByteLength; } |
| const void* text() { return (const void*)fText; } |
| size_t fByteLength; |
| const char* fText; |
| }; |
| |
| void get_text(SkReader32* reader, TextContainer* text) { |
| size_t length = text->fByteLength = reader->readInt(); |
| text->fText = (const char*)reader->skip(length); |
| } |
| |
| // FIXME: SkBitmaps are stateful, so we need to copy them to play back in multiple threads. |
| static SkBitmap shallow_copy(const SkBitmap& bitmap) { |
| return bitmap; |
| } |
| |
| void SkPicturePlayback::draw(SkCanvas* canvas, SkPicture::AbortCallback* callback) { |
| AutoResetOpID aroi(this); |
| SkASSERT(0 == fCurOffset); |
| |
| SkReader32 reader(fPictureData->opData()->bytes(), fPictureData->opData()->size()); |
| |
| // Record this, so we can concat w/ it if we encounter a setMatrix() |
| SkMatrix initialMatrix = canvas->getTotalMatrix(); |
| |
| SkAutoCanvasRestore acr(canvas, false); |
| |
| while (!reader.eof()) { |
| if (callback && callback->abort()) { |
| return; |
| } |
| |
| fCurOffset = reader.offset(); |
| uint32_t size; |
| DrawType op = ReadOpAndSize(&reader, &size); |
| |
| this->handleOp(&reader, op, size, canvas, initialMatrix); |
| } |
| } |
| |
| void SkPicturePlayback::handleOp(SkReader32* reader, |
| DrawType op, |
| uint32_t size, |
| SkCanvas* canvas, |
| const SkMatrix& initialMatrix) { |
| switch (op) { |
| case NOOP: { |
| SkASSERT(size >= 4); |
| reader->skip(size - 4); |
| } break; |
| case CLIP_PATH: { |
| const SkPath& path = fPictureData->getPath(reader); |
| uint32_t packed = reader->readInt(); |
| SkRegion::Op regionOp = ClipParams_unpackRegionOp(packed); |
| bool doAA = ClipParams_unpackDoAA(packed); |
| size_t offsetToRestore = reader->readInt(); |
| SkASSERT(!offsetToRestore || offsetToRestore >= reader->offset()); |
| canvas->clipPath(path, regionOp, doAA); |
| if (canvas->isClipEmpty() && offsetToRestore) { |
| reader->setOffset(offsetToRestore); |
| } |
| } break; |
| case CLIP_REGION: { |
| SkRegion region; |
| reader->readRegion(®ion); |
| uint32_t packed = reader->readInt(); |
| SkRegion::Op regionOp = ClipParams_unpackRegionOp(packed); |
| size_t offsetToRestore = reader->readInt(); |
| SkASSERT(!offsetToRestore || offsetToRestore >= reader->offset()); |
| canvas->clipRegion(region, regionOp); |
| if (canvas->isClipEmpty() && offsetToRestore) { |
| reader->setOffset(offsetToRestore); |
| } |
| } break; |
| case CLIP_RECT: { |
| const SkRect& rect = reader->skipT<SkRect>(); |
| uint32_t packed = reader->readInt(); |
| SkRegion::Op regionOp = ClipParams_unpackRegionOp(packed); |
| bool doAA = ClipParams_unpackDoAA(packed); |
| size_t offsetToRestore = reader->readInt(); |
| SkASSERT(!offsetToRestore || offsetToRestore >= reader->offset()); |
| canvas->clipRect(rect, regionOp, doAA); |
| if (canvas->isClipEmpty() && offsetToRestore) { |
| reader->setOffset(offsetToRestore); |
| } |
| } break; |
| case CLIP_RRECT: { |
| SkRRect rrect; |
| reader->readRRect(&rrect); |
| uint32_t packed = reader->readInt(); |
| SkRegion::Op regionOp = ClipParams_unpackRegionOp(packed); |
| bool doAA = ClipParams_unpackDoAA(packed); |
| size_t offsetToRestore = reader->readInt(); |
| SkASSERT(!offsetToRestore || offsetToRestore >= reader->offset()); |
| canvas->clipRRect(rrect, regionOp, doAA); |
| if (canvas->isClipEmpty() && offsetToRestore) { |
| reader->setOffset(offsetToRestore); |
| } |
| } break; |
| case PUSH_CULL: break; // Deprecated, safe to ignore both push and pop. |
| case POP_CULL: break; |
| case CONCAT: { |
| SkMatrix matrix; |
| reader->readMatrix(&matrix); |
| canvas->concat(matrix); |
| break; |
| } |
| case DRAW_ATLAS: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkImage* atlas = fPictureData->getImage(reader); |
| const uint32_t flags = reader->readU32(); |
| const int count = reader->readU32(); |
| const SkRSXform* xform = (const SkRSXform*)reader->skip(count * sizeof(SkRSXform)); |
| const SkRect* tex = (const SkRect*)reader->skip(count * sizeof(SkRect)); |
| const SkColor* colors = nullptr; |
| SkXfermode::Mode mode = SkXfermode::kDst_Mode; |
| if (flags & DRAW_ATLAS_HAS_COLORS) { |
| colors = (const SkColor*)reader->skip(count * sizeof(SkColor)); |
| mode = (SkXfermode::Mode)reader->readU32(); |
| } |
| const SkRect* cull = nullptr; |
| if (flags & DRAW_ATLAS_HAS_CULL) { |
| cull = (const SkRect*)reader->skip(sizeof(SkRect)); |
| } |
| canvas->drawAtlas(atlas, xform, tex, colors, count, mode, cull, paint); |
| } break; |
| case DRAW_BITMAP: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkBitmap bitmap = shallow_copy(fPictureData->getBitmap(reader)); |
| const SkPoint& loc = reader->skipT<SkPoint>(); |
| canvas->drawBitmap(bitmap, loc.fX, loc.fY, paint); |
| } break; |
| case DRAW_BITMAP_RECT: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkBitmap bitmap = shallow_copy(fPictureData->getBitmap(reader)); |
| const SkRect* src = get_rect_ptr(reader); // may be null |
| const SkRect& dst = reader->skipT<SkRect>(); // required |
| SkCanvas::SrcRectConstraint constraint = (SkCanvas::SrcRectConstraint)reader->readInt(); |
| canvas->legacy_drawBitmapRect(bitmap, src, dst, paint, constraint); |
| } break; |
| case DRAW_BITMAP_MATRIX: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkBitmap bitmap = shallow_copy(fPictureData->getBitmap(reader)); |
| SkMatrix matrix; |
| reader->readMatrix(&matrix); |
| |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->concat(matrix); |
| canvas->drawBitmap(bitmap, 0, 0, paint); |
| } break; |
| case DRAW_BITMAP_NINE: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkBitmap bitmap = shallow_copy(fPictureData->getBitmap(reader)); |
| const SkIRect& src = reader->skipT<SkIRect>(); |
| const SkRect& dst = reader->skipT<SkRect>(); |
| canvas->drawBitmapNine(bitmap, src, dst, paint); |
| } break; |
| case DRAW_CLEAR: |
| canvas->clear(reader->readInt()); |
| break; |
| case DRAW_DATA: { |
| // This opcode is now dead, just need to skip it for backwards compatibility |
| size_t length = reader->readInt(); |
| (void)reader->skip(length); |
| // skip handles padding the read out to a multiple of 4 |
| } break; |
| case DRAW_DRRECT: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| SkRRect outer, inner; |
| reader->readRRect(&outer); |
| reader->readRRect(&inner); |
| canvas->drawDRRect(outer, inner, paint); |
| } break; |
| case BEGIN_COMMENT_GROUP: |
| reader->readString(); |
| // deprecated (M44) |
| break; |
| case COMMENT: |
| reader->readString(); |
| reader->readString(); |
| // deprecated (M44) |
| break; |
| case END_COMMENT_GROUP: |
| // deprecated (M44) |
| break; |
| case DRAW_IMAGE: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkImage* image = fPictureData->getImage(reader); |
| const SkPoint& loc = reader->skipT<SkPoint>(); |
| canvas->drawImage(image, loc.fX, loc.fY, paint); |
| } break; |
| case DRAW_IMAGE_NINE: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkImage* image = fPictureData->getImage(reader); |
| const SkIRect& center = reader->skipT<SkIRect>(); |
| const SkRect& dst = reader->skipT<SkRect>(); |
| canvas->drawImageNine(image, center, dst, paint); |
| } break; |
| case DRAW_IMAGE_RECT_STRICT: |
| case DRAW_IMAGE_RECT: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| const SkImage* image = fPictureData->getImage(reader); |
| const SkRect* src = get_rect_ptr(reader); // may be null |
| const SkRect& dst = reader->skipT<SkRect>(); // required |
| // DRAW_IMAGE_RECT_STRICT assumes this constraint, and doesn't store it |
| SkCanvas::SrcRectConstraint constraint = SkCanvas::kStrict_SrcRectConstraint; |
| if (DRAW_IMAGE_RECT == op) { |
| // newer op-code stores the constraint explicitly |
| constraint = (SkCanvas::SrcRectConstraint)reader->readInt(); |
| } |
| canvas->legacy_drawImageRect(image, src, dst, paint, constraint); |
| } break; |
| case DRAW_OVAL: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| canvas->drawOval(reader->skipT<SkRect>(), paint); |
| } break; |
| case DRAW_PAINT: |
| canvas->drawPaint(*fPictureData->getPaint(reader)); |
| break; |
| case DRAW_PATCH: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| |
| const SkPoint* cubics = (const SkPoint*)reader->skip(SkPatchUtils::kNumCtrlPts * |
| sizeof(SkPoint)); |
| uint32_t flag = reader->readInt(); |
| const SkColor* colors = nullptr; |
| if (flag & DRAW_VERTICES_HAS_COLORS) { |
| colors = (const SkColor*)reader->skip(SkPatchUtils::kNumCorners * sizeof(SkColor)); |
| } |
| const SkPoint* texCoords = nullptr; |
| if (flag & DRAW_VERTICES_HAS_TEXS) { |
| texCoords = (const SkPoint*)reader->skip(SkPatchUtils::kNumCorners * |
| sizeof(SkPoint)); |
| } |
| SkAutoTUnref<SkXfermode> xfer; |
| if (flag & DRAW_VERTICES_HAS_XFER) { |
| int mode = reader->readInt(); |
| if (mode < 0 || mode > SkXfermode::kLastMode) { |
| mode = SkXfermode::kModulate_Mode; |
| } |
| xfer.reset(SkXfermode::Create((SkXfermode::Mode)mode)); |
| } |
| canvas->drawPatch(cubics, colors, texCoords, xfer, paint); |
| } break; |
| case DRAW_PATH: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| canvas->drawPath(fPictureData->getPath(reader), paint); |
| } break; |
| case DRAW_PICTURE: |
| canvas->drawPicture(fPictureData->getPicture(reader)); |
| break; |
| case DRAW_PICTURE_MATRIX_PAINT: { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| SkMatrix matrix; |
| reader->readMatrix(&matrix); |
| const SkPicture* pic = fPictureData->getPicture(reader); |
| canvas->drawPicture(pic, &matrix, paint); |
| } break; |
| case DRAW_POINTS: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| SkCanvas::PointMode mode = (SkCanvas::PointMode)reader->readInt(); |
| size_t count = reader->readInt(); |
| const SkPoint* pts = (const SkPoint*)reader->skip(sizeof(SkPoint)* count); |
| canvas->drawPoints(mode, count, pts, paint); |
| } break; |
| case DRAW_POS_TEXT: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| size_t points = reader->readInt(); |
| const SkPoint* pos = (const SkPoint*)reader->skip(points * sizeof(SkPoint)); |
| canvas->drawPosText(text.text(), text.length(), pos, paint); |
| } break; |
| case DRAW_POS_TEXT_TOP_BOTTOM: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| size_t points = reader->readInt(); |
| const SkPoint* pos = (const SkPoint*)reader->skip(points * sizeof(SkPoint)); |
| const SkScalar top = reader->readScalar(); |
| const SkScalar bottom = reader->readScalar(); |
| if (!canvas->quickRejectY(top, bottom)) { |
| canvas->drawPosText(text.text(), text.length(), pos, paint); |
| } |
| } break; |
| case DRAW_POS_TEXT_H: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| size_t xCount = reader->readInt(); |
| const SkScalar constY = reader->readScalar(); |
| const SkScalar* xpos = (const SkScalar*)reader->skip(xCount * sizeof(SkScalar)); |
| canvas->drawPosTextH(text.text(), text.length(), xpos, constY, paint); |
| } break; |
| case DRAW_POS_TEXT_H_TOP_BOTTOM: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| size_t xCount = reader->readInt(); |
| const SkScalar* xpos = (const SkScalar*)reader->skip((3 + xCount) * sizeof(SkScalar)); |
| const SkScalar top = *xpos++; |
| const SkScalar bottom = *xpos++; |
| const SkScalar constY = *xpos++; |
| if (!canvas->quickRejectY(top, bottom)) { |
| canvas->drawPosTextH(text.text(), text.length(), xpos, constY, paint); |
| } |
| } break; |
| case DRAW_RECT: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| canvas->drawRect(reader->skipT<SkRect>(), paint); |
| } break; |
| case DRAW_RRECT: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| SkRRect rrect; |
| reader->readRRect(&rrect); |
| canvas->drawRRect(rrect, paint); |
| } break; |
| case DRAW_SPRITE: { |
| /* const SkPaint* paint = */ fPictureData->getPaint(reader); |
| /* const SkBitmap bitmap = */ shallow_copy(fPictureData->getBitmap(reader)); |
| /* int left = */ reader->readInt(); |
| /* int top = */ reader->readInt(); |
| // drawSprite removed dec-2015 |
| } break; |
| case DRAW_TEXT: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| SkScalar x = reader->readScalar(); |
| SkScalar y = reader->readScalar(); |
| canvas->drawText(text.text(), text.length(), x, y, paint); |
| } break; |
| case DRAW_TEXT_BLOB: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| const SkTextBlob* blob = fPictureData->getTextBlob(reader); |
| SkScalar x = reader->readScalar(); |
| SkScalar y = reader->readScalar(); |
| canvas->drawTextBlob(blob, x, y, paint); |
| } break; |
| case DRAW_TEXT_TOP_BOTTOM: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| const SkScalar* ptr = (const SkScalar*)reader->skip(4 * sizeof(SkScalar)); |
| // ptr[0] == x |
| // ptr[1] == y |
| // ptr[2] == top |
| // ptr[3] == bottom |
| if (!canvas->quickRejectY(ptr[2], ptr[3])) { |
| canvas->drawText(text.text(), text.length(), ptr[0], ptr[1], paint); |
| } |
| } break; |
| case DRAW_TEXT_ON_PATH: { |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| TextContainer text; |
| get_text(reader, &text); |
| const SkPath& path = fPictureData->getPath(reader); |
| SkMatrix matrix; |
| reader->readMatrix(&matrix); |
| canvas->drawTextOnPath(text.text(), text.length(), path, &matrix, paint); |
| } break; |
| case DRAW_VERTICES: { |
| SkAutoTUnref<SkXfermode> xfer; |
| const SkPaint& paint = *fPictureData->getPaint(reader); |
| DrawVertexFlags flags = (DrawVertexFlags)reader->readInt(); |
| SkCanvas::VertexMode vmode = (SkCanvas::VertexMode)reader->readInt(); |
| int vCount = reader->readInt(); |
| const SkPoint* verts = (const SkPoint*)reader->skip(vCount * sizeof(SkPoint)); |
| const SkPoint* texs = nullptr; |
| const SkColor* colors = nullptr; |
| const uint16_t* indices = nullptr; |
| int iCount = 0; |
| if (flags & DRAW_VERTICES_HAS_TEXS) { |
| texs = (const SkPoint*)reader->skip(vCount * sizeof(SkPoint)); |
| } |
| if (flags & DRAW_VERTICES_HAS_COLORS) { |
| colors = (const SkColor*)reader->skip(vCount * sizeof(SkColor)); |
| } |
| if (flags & DRAW_VERTICES_HAS_INDICES) { |
| iCount = reader->readInt(); |
| indices = (const uint16_t*)reader->skip(iCount * sizeof(uint16_t)); |
| } |
| if (flags & DRAW_VERTICES_HAS_XFER) { |
| int mode = reader->readInt(); |
| if (mode < 0 || mode > SkXfermode::kLastMode) { |
| mode = SkXfermode::kModulate_Mode; |
| } |
| xfer.reset(SkXfermode::Create((SkXfermode::Mode)mode)); |
| } |
| canvas->drawVertices(vmode, vCount, verts, texs, colors, xfer, indices, iCount, paint); |
| } break; |
| case RESTORE: |
| canvas->restore(); |
| break; |
| case ROTATE: |
| canvas->rotate(reader->readScalar()); |
| break; |
| case SAVE: |
| // SKPs with version < 29 also store a SaveFlags param. |
| if (size > 4) { |
| SkASSERT(8 == size); |
| reader->readInt(); |
| } |
| canvas->save(); |
| break; |
| case SAVE_LAYER_SAVEFLAGS_DEPRECATED: { |
| const SkRect* boundsPtr = get_rect_ptr(reader); |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| auto flags = SkCanvas::LegacySaveFlagsToSaveLayerFlags(reader->readInt()); |
| canvas->saveLayer(SkCanvas::SaveLayerRec(boundsPtr, paint, flags)); |
| } break; |
| case SAVE_LAYER_SAVELAYERFLAGS_DEPRECATED_JAN_2016: { |
| const SkRect* boundsPtr = get_rect_ptr(reader); |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| canvas->saveLayer(SkCanvas::SaveLayerRec(boundsPtr, paint, reader->readInt())); |
| } break; |
| case SAVE_LAYER_SAVELAYERREC: { |
| SkCanvas::SaveLayerRec rec(nullptr, nullptr, nullptr, 0); |
| const uint32_t flatFlags = reader->readInt(); |
| if (flatFlags & SAVELAYERREC_HAS_BOUNDS) { |
| rec.fBounds = &reader->skipT<SkRect>(); |
| } |
| if (flatFlags & SAVELAYERREC_HAS_PAINT) { |
| rec.fPaint = fPictureData->getPaint(reader); |
| } |
| if (flatFlags & SAVELAYERREC_HAS_BACKDROP) { |
| const SkPaint* paint = fPictureData->getPaint(reader); |
| rec.fBackdrop = paint->getImageFilter(); |
| } |
| if (flatFlags & SAVELAYERREC_HAS_FLAGS) { |
| rec.fSaveLayerFlags = reader->readInt(); |
| } |
| canvas->saveLayer(rec); |
| } break; |
| case SCALE: { |
| SkScalar sx = reader->readScalar(); |
| SkScalar sy = reader->readScalar(); |
| canvas->scale(sx, sy); |
| } break; |
| case SET_MATRIX: { |
| SkMatrix matrix; |
| reader->readMatrix(&matrix); |
| matrix.postConcat(initialMatrix); |
| canvas->setMatrix(matrix); |
| } break; |
| case SKEW: { |
| SkScalar sx = reader->readScalar(); |
| SkScalar sy = reader->readScalar(); |
| canvas->skew(sx, sy); |
| } break; |
| case TRANSLATE: { |
| SkScalar dx = reader->readScalar(); |
| SkScalar dy = reader->readScalar(); |
| canvas->translate(dx, dy); |
| } break; |
| default: |
| SkASSERTF(false, "Unknown draw type: %d", op); |
| } |
| } |
| |