junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 "SkDropShadowImageFilter.h" |
| 9 | |
| 10 | #include "SkBitmap.h" |
| 11 | #include "SkBlurImageFilter.h" |
| 12 | #include "SkCanvas.h" |
| 13 | #include "SkColorMatrixFilter.h" |
| 14 | #include "SkDevice.h" |
| 15 | #include "SkFlattenableBuffers.h" |
| 16 | |
| 17 | SkDropShadowImageFilter::SkDropShadowImageFilter(SkScalar dx, SkScalar dy, SkScalar sigma, SkColor color, SkImageFilter* input) |
| 18 | : SkImageFilter(input) |
| 19 | , fDx(dx) |
| 20 | , fDy(dy) |
| 21 | , fSigma(sigma) |
| 22 | , fColor(color) |
| 23 | { |
| 24 | } |
| 25 | |
| 26 | SkDropShadowImageFilter::SkDropShadowImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) |
| 27 | { |
| 28 | fDx = buffer.readScalar(); |
| 29 | fDy = buffer.readScalar(); |
| 30 | fSigma = buffer.readScalar(); |
| 31 | fColor = buffer.readColor(); |
| 32 | } |
| 33 | |
| 34 | void SkDropShadowImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const |
| 35 | { |
| 36 | this->INHERITED::flatten(buffer); |
| 37 | buffer.writeScalar(fDx); |
| 38 | buffer.writeScalar(fDy); |
| 39 | buffer.writeScalar(fSigma); |
| 40 | buffer.writeColor(fColor); |
| 41 | } |
| 42 | |
| 43 | bool SkDropShadowImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source, const SkMatrix& matrix, SkBitmap* result, SkIPoint* loc) |
| 44 | { |
| 45 | SkBitmap src = source; |
| 46 | if (getInput(0) && !getInput(0)->filterImage(proxy, source, matrix, &src, loc)) |
| 47 | return false; |
| 48 | |
robertphillips@google.com | 9b051a3 | 2013-08-20 20:06:40 +0000 | [diff] [blame^] | 49 | SkAutoTUnref<SkDevice> device(proxy->createDevice(src.width(), src.height())); |
junov@chromium.org | f44fcdc | 2013-08-07 20:00:55 +0000 | [diff] [blame] | 50 | SkCanvas canvas(device.get()); |
| 51 | |
| 52 | SkAutoTUnref<SkImageFilter> blurFilter(new SkBlurImageFilter(fSigma, fSigma)); |
| 53 | SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(fColor, SkXfermode::kSrcIn_Mode)); |
| 54 | SkPaint paint; |
| 55 | paint.setImageFilter(blurFilter.get()); |
| 56 | paint.setColorFilter(colorFilter.get()); |
| 57 | paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); |
| 58 | canvas.drawBitmap(src, fDx, fDy, &paint); |
| 59 | canvas.drawBitmap(src, 0, 0); |
| 60 | *result = device->accessBitmap(false); |
| 61 | return true; |
| 62 | } |