1 /* 2 * Copyright 2016 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 "SkPaintImageFilter.h" 9 #include "SkBitmap.h" 10 #include "SkCanvas.h" 11 #include "SkDevice.h" 12 #include "SkReadBuffer.h" 13 #include "SkWriteBuffer.h" 14 15 SkImageFilter* SkPaintImageFilter::Create(const SkPaint& paint, const CropRect* cropRect) { 16 return new SkPaintImageFilter(paint, cropRect); 17 } 18 19 SkPaintImageFilter::SkPaintImageFilter(const SkPaint& paint, const CropRect* cropRect) 20 : INHERITED(0, nullptr, cropRect) 21 , fPaint(paint) { 22 } 23 24 SkFlattenable* SkPaintImageFilter::CreateProc(SkReadBuffer& buffer) { 25 SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0); 26 SkPaint paint; 27 buffer.readPaint(&paint); 28 return Create(paint, &common.cropRect()); 29 } 30 31 void SkPaintImageFilter::flatten(SkWriteBuffer& buffer) const { 32 this->INHERITED::flatten(buffer); 33 buffer.writePaint(fPaint); 34 } 35 36 bool SkPaintImageFilter::onFilterImageDeprecated(Proxy* proxy, 37 const SkBitmap& source, 38 const Context& ctx, 39 SkBitmap* result, 40 SkIPoint* offset) const { 41 SkIRect bounds; 42 if (!this->applyCropRect(ctx, source.bounds(), &bounds)) { 43 return false; 44 } 45 46 SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(bounds.width(), 47 bounds.height())); 48 if (nullptr == device.get()) { 49 return false; 50 } 51 SkCanvas canvas(device.get()); 52 53 SkMatrix matrix(ctx.ctm()); 54 matrix.postTranslate(SkIntToScalar(-bounds.left()), SkIntToScalar(-bounds.top())); 55 SkRect rect = SkRect::MakeWH(SkIntToScalar(bounds.width()), SkIntToScalar(bounds.height())); 56 SkMatrix inverse; 57 if (matrix.invert(&inverse)) { 58 inverse.mapRect(&rect); 59 } 60 canvas.setMatrix(matrix); 61 canvas.drawRect(rect, fPaint); 62 63 *result = device.get()->accessBitmap(false); 64 offset->fX = bounds.fLeft; 65 offset->fY = bounds.fTop; 66 return true; 67 } 68 69 bool SkPaintImageFilter::canComputeFastBounds() const { 70 // http:skbug.com/4627: "make computeFastBounds and onFilterBounds() CropRect-aware" 71 // computeFastBounds() doesn't currently take the crop rect into account, 72 // so we can't compute it. If a full crop rect is set, we should return true here. 73 return false; 74 } 75 76 #ifndef SK_IGNORE_TO_STRING 77 void SkPaintImageFilter::toString(SkString* str) const { 78 str->appendf("SkPaintImageFilter: ("); 79 str->append(")"); 80 } 81 #endif 82
