| /* |
| * 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<SkBaseDevice> 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; |
| } |