diff options
Diffstat (limited to 'effects/SkDropShadowImageFilter.cpp')
-rw-r--r-- | effects/SkDropShadowImageFilter.cpp | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/effects/SkDropShadowImageFilter.cpp b/effects/SkDropShadowImageFilter.cpp new file mode 100644 index 00000000..c9cfd602 --- /dev/null +++ b/effects/SkDropShadowImageFilter.cpp @@ -0,0 +1,63 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkDropShadowImageFilter.h" + +#include "SkBitmap.h" +#include "SkBlurImageFilter.h" +#include "SkCanvas.h" +#include "SkColorMatrixFilter.h" +#include "SkDevice.h" +#include "SkFlattenableBuffers.h" + +SkDropShadowImageFilter::SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigma, SkColor color, SkImageFilter* input) + : SkImageFilter(input) + , fDx(dx) + , fDy(dy) + , fSigma(sigma) + , fColor(color) +{ +} + +SkDropShadowImageFilter::SkDropShadowImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) +{ + fDx = buffer.readScalar(); + fDy = buffer.readScalar(); + fSigma = buffer.readScalar(); + fColor = buffer.readColor(); +} + +void SkDropShadowImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const +{ + this->INHERITED::flatten(buffer); + buffer.writeScalar(fDx); + buffer.writeScalar(fDy); + buffer.writeScalar(fSigma); + buffer.writeColor(fColor); +} + +bool SkDropShadowImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source, const SkMatrix& matrix, SkBitmap* result, SkIPoint* loc) +{ + SkBitmap src = source; + if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) + return false; + + SkAutoTUnref<SkDevice> device(proxy->createDevice(src.width(), src.height())); + SkCanvas canvas(device.get()); + + SkAutoTUnref<SkImageFilter> blurFilter(new SkBlurImageFilter(fSigma, fSigma)); + SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(fColor, SkXfermode::kSrcIn_Mode)); + SkPaint paint; + paint.setImageFilter(blurFilter.get()); + paint.setColorFilter(colorFilter.get()); + paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); + canvas.drawBitmap(src, fDx, fDy, &paint); + canvas.drawBitmap(src, 0, 0); + *result = device->accessBitmap(false); + return true; +} + |