SkTileImageFilter.cpp revision 4cb543d6057b692e1099e9f115155f0bf323a0c8
11a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org/* 21a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org * Copyright 2013 Google Inc. 31a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org * 41a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org * Use of this source code is governed by a BSD-style license that can be 51a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org * found in the LICENSE file. 61a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org */ 71a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 81a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkTileImageFilter.h" 91a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkBitmap.h" 101a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkCanvas.h" 111a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkDevice.h" 128b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "SkReadBuffer.h" 138b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.org#include "SkWriteBuffer.h" 141a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkMatrix.h" 151a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkPaint.h" 161a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org#include "SkShader.h" 17c0b7e10c6a68f59e1653e6c18e6bc954b3c3f0cfcommit-bot@chromium.org#include "SkValidationUtils.h" 181a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 194cb543d6057b692e1099e9f115155f0bf323a0c8senorblanco@chromium.orgbool SkTileImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src, const SkImageFilter::Context& ctx, 20ae761f7545d8ebf181d220169afac2056b057b8ccommit-bot@chromium.org SkBitmap* dst, SkIPoint* offset) const { 211a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkBitmap source = src; 221a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkImageFilter* input = getInput(0); 236776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org SkIPoint srcOffset = SkIPoint::Make(0, 0); 244cb543d6057b692e1099e9f115155f0bf323a0c8senorblanco@chromium.org if (input && !input->filterImage(proxy, src, ctx, &source, &srcOffset)) { 251a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org return false; 261a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org } 271a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 28e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org SkRect dstRect; 294cb543d6057b692e1099e9f115155f0bf323a0c8senorblanco@chromium.org ctx.ctm().mapRect(&dstRect, fDstRect); 306776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org SkIRect dstIRect; 316776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org dstRect.roundOut(&dstIRect); 326776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org int w = dstIRect.width(); 336776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org int h = dstIRect.height(); 341a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) { 351a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org return false; 361a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org } 371a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 38e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org SkRect srcRect; 394cb543d6057b692e1099e9f115155f0bf323a0c8senorblanco@chromium.org ctx.ctm().mapRect(&srcRect, fSrcRect); 40e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org SkIRect srcIRect; 41e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org srcRect.roundOut(&srcIRect); 426776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org srcIRect.offset(-srcOffset); 431a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkBitmap subset; 44e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org SkIRect bounds; 45e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org source.getBounds(&bounds); 466776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org 47e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org if (!srcIRect.intersect(bounds)) { 486776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org offset->fX = offset->fY = 0; 49e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org return true; 50e93e1dbf0eced1e1b9aeed7c0c170961e2d61e32senorblanco@chromium.org } else if (!source.extractSubset(&subset, srcIRect)) { 511a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org return false; 521a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org } 531a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 541a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h)); 55cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org if (NULL == device.get()) { 56cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org return false; 57cd3b15ca6364a04b0eeeb4f89c7daa8aefe854c8commit-bot@chromium.org } 581a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkCanvas canvas(device); 591a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkPaint paint; 601a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org paint.setXfermodeMode(SkXfermode::kSrc_Mode); 611a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 6265caeaf32d09f5886f3c740cfef2f1c26ef9cb50skia.committer@gmail.com SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset, 631a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode)); 646776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org SkMatrix shaderMatrix; 656776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org shaderMatrix.setTranslate(SkIntToScalar(srcOffset.fX), 666776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org SkIntToScalar(srcOffset.fY)); 676776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org shader->setLocalMatrix(shaderMatrix); 681a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org paint.setShader(shader); 696776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org canvas.translate(-dstRect.fLeft, -dstRect.fTop); 701a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org canvas.drawRect(dstRect, paint); 711a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org *dst = device->accessBitmap(false); 726776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org offset->fX = dstIRect.fLeft; 736776b82d466fa93ccffd251fdf556fe058395444senorblanco@chromium.org offset->fY = dstIRect.fTop; 741a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org return true; 751a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org} 761a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 778b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.orgSkTileImageFilter::SkTileImageFilter(SkReadBuffer& buffer) 78ce33d60187718e7bb01944ee130c9f5d9fb335eccommit-bot@chromium.org : INHERITED(1, buffer) { 791a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org buffer.readRect(&fSrcRect); 801a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org buffer.readRect(&fDstRect); 81c2e9db30d393862bd3485cfe57b4ac06433f2f32commit-bot@chromium.org buffer.validate(buffer.isValid() && SkIsValidRect(fSrcRect) && SkIsValidRect(fDstRect)); 821a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org} 831a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org 848b0e8ac5f582de80356019406e2975079bf0829dcommit-bot@chromium.orgvoid SkTileImageFilter::flatten(SkWriteBuffer& buffer) const { 851a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org this->INHERITED::flatten(buffer); 861a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org buffer.writeRect(fSrcRect); 871a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org buffer.writeRect(fDstRect); 881a4fb70c8a04db2d92ec821555f91218a989031dcommit-bot@chromium.org} 89