commit-bot@chromium.org | 1a4fb70 | 2013-09-26 16:09:28 +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 "SkTileImageFilter.h" |
| 9 | #include "SkBitmap.h" |
| 10 | #include "SkCanvas.h" |
| 11 | #include "SkDevice.h" |
| 12 | #include "SkFlattenableBuffers.h" |
| 13 | #include "SkMatrix.h" |
| 14 | #include "SkPaint.h" |
| 15 | #include "SkShader.h" |
| 16 | |
| 17 | bool SkTileImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm, |
| 18 | SkBitmap* dst, SkIPoint* offset) { |
| 19 | SkBitmap source = src; |
| 20 | SkImageFilter* input = getInput(0); |
| 21 | SkIPoint localOffset = SkIPoint::Make(0, 0); |
| 22 | if (input && !input->filterImage(proxy, src, ctm, &source, &localOffset)) { |
| 23 | return false; |
| 24 | } |
| 25 | |
| 26 | int w = SkScalarTruncToInt(fDstRect.width()); |
| 27 | int h = SkScalarTruncToInt(fDstRect.height()); |
| 28 | if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) { |
| 29 | return false; |
| 30 | } |
| 31 | |
| 32 | SkIRect srcRect; |
| 33 | fSrcRect.roundOut(&srcRect); |
| 34 | SkBitmap subset; |
| 35 | if (!source.extractSubset(&subset, srcRect)) { |
| 36 | return false; |
| 37 | } |
| 38 | |
| 39 | SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h)); |
| 40 | SkIRect bounds; |
| 41 | source.getBounds(&bounds); |
| 42 | SkCanvas canvas(device); |
| 43 | SkPaint paint; |
| 44 | paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| 45 | |
| 46 | SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset, |
| 47 | SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode)); |
| 48 | paint.setShader(shader); |
| 49 | SkRect dstRect = fDstRect; |
| 50 | dstRect.offset(SkIntToScalar(localOffset.fX), SkIntToScalar(localOffset.fY)); |
| 51 | canvas.drawRect(dstRect, paint); |
| 52 | *dst = device->accessBitmap(false); |
| 53 | return true; |
| 54 | } |
| 55 | |
| 56 | SkTileImageFilter::SkTileImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 57 | buffer.readRect(&fSrcRect); |
| 58 | buffer.readRect(&fDstRect); |
| 59 | } |
| 60 | |
| 61 | void SkTileImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 62 | this->INHERITED::flatten(buffer); |
| 63 | buffer.writeRect(fSrcRect); |
| 64 | buffer.writeRect(fDstRect); |
| 65 | } |
| 66 | |