| /* |
| * 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 "SkTileImageFilter.h" |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkDevice.h" |
| #include "SkOffsetImageFilter.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "SkMatrix.h" |
| #include "SkPaint.h" |
| #include "SkShader.h" |
| #include "SkValidationUtils.h" |
| |
| SkImageFilter* SkTileImageFilter::Create(const SkRect& srcRect, const SkRect& dstRect, |
| SkImageFilter* input) { |
| if (!SkIsValidRect(srcRect) || !SkIsValidRect(dstRect)) { |
| return nullptr; |
| } |
| if (srcRect.width() == dstRect.width() && srcRect.height() == dstRect.height()) { |
| SkRect ir = dstRect; |
| if (!ir.intersect(srcRect)) { |
| return SkSafeRef(input); |
| } |
| CropRect cropRect(ir); |
| return SkOffsetImageFilter::Create(dstRect.x() - srcRect.x(), |
| dstRect.y() - srcRect.y(), |
| input, &cropRect); |
| } |
| return new SkTileImageFilter(srcRect, dstRect, input); |
| } |
| |
| bool SkTileImageFilter::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src, |
| const Context& ctx, |
| SkBitmap* dst, SkIPoint* offset) const { |
| SkBitmap source = src; |
| SkIPoint srcOffset = SkIPoint::Make(0, 0); |
| if (!this->filterInputDeprecated(0, proxy, src, ctx, &source, &srcOffset)) { |
| return false; |
| } |
| |
| SkRect dstRect; |
| ctx.ctm().mapRect(&dstRect, fDstRect); |
| if (!dstRect.intersect(SkRect::Make(ctx.clipBounds()))) { |
| offset->fX = offset->fY = 0; |
| return true; |
| } |
| const SkIRect dstIRect = dstRect.roundOut(); |
| int w = dstIRect.width(); |
| int h = dstIRect.height(); |
| if (!fSrcRect.width() || !fSrcRect.height() || !w || !h) { |
| return false; |
| } |
| |
| SkRect srcRect; |
| ctx.ctm().mapRect(&srcRect, fSrcRect); |
| SkIRect srcIRect; |
| srcRect.roundOut(&srcIRect); |
| srcIRect.offset(-srcOffset); |
| SkBitmap subset; |
| SkIRect srcBounds; |
| source.getBounds(&srcBounds); |
| |
| if (!SkIRect::Intersects(srcIRect, srcBounds)) { |
| offset->fX = offset->fY = 0; |
| return true; |
| } |
| if (srcBounds.contains(srcIRect)) { |
| if (!source.extractSubset(&subset, srcIRect)) { |
| return false; |
| } |
| } else { |
| SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(srcIRect.width(), |
| srcIRect.height(), |
| kPossible_TileUsage)); |
| if (!device) { |
| return false; |
| } |
| SkCanvas canvas(device); |
| canvas.drawBitmap(src, SkIntToScalar(srcOffset.x()), |
| SkIntToScalar(srcOffset.y())); |
| subset = device->accessBitmap(false); |
| } |
| SkASSERT(subset.width() == srcIRect.width()); |
| SkASSERT(subset.height() == srcIRect.height()); |
| |
| SkAutoTUnref<SkBaseDevice> device(proxy->createDevice(w, h)); |
| if (nullptr == device.get()) { |
| return false; |
| } |
| SkCanvas canvas(device); |
| SkPaint paint; |
| paint.setXfermodeMode(SkXfermode::kSrc_Mode); |
| paint.setShader(SkShader::MakeBitmapShader(subset, SkShader::kRepeat_TileMode, |
| SkShader::kRepeat_TileMode)); |
| canvas.translate(-dstRect.fLeft, -dstRect.fTop); |
| canvas.drawRect(dstRect, paint); |
| *dst = device->accessBitmap(false); |
| offset->fX = dstIRect.fLeft; |
| offset->fY = dstIRect.fTop; |
| return true; |
| } |
| |
| SkIRect SkTileImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm, |
| MapDirection direction) const { |
| SkRect rect = kReverse_MapDirection == direction ? fSrcRect : fDstRect; |
| ctm.mapRect(&rect); |
| return rect.roundOut(); |
| } |
| |
| SkIRect SkTileImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix&, MapDirection) const { |
| // Don't recurse into inputs. |
| return src; |
| } |
| |
| SkRect SkTileImageFilter::computeFastBounds(const SkRect& src) const { |
| return fDstRect; |
| } |
| |
| SkFlattenable* SkTileImageFilter::CreateProc(SkReadBuffer& buffer) { |
| SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); |
| SkRect src, dst; |
| buffer.readRect(&src); |
| buffer.readRect(&dst); |
| return Create(src, dst, common.getInput(0)); |
| } |
| |
| void SkTileImageFilter::flatten(SkWriteBuffer& buffer) const { |
| this->INHERITED::flatten(buffer); |
| buffer.writeRect(fSrcRect); |
| buffer.writeRect(fDstRect); |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkTileImageFilter::toString(SkString* str) const { |
| str->appendf("SkTileImageFilter: ("); |
| str->appendf("src: %.2f %.2f %.2f %.2f", |
| fSrcRect.fLeft, fSrcRect.fTop, fSrcRect.fRight, fSrcRect.fBottom); |
| str->appendf(" dst: %.2f %.2f %.2f %.2f", |
| fDstRect.fLeft, fDstRect.fTop, fDstRect.fRight, fDstRect.fBottom); |
| if (this->getInput(0)) { |
| str->appendf("input: ("); |
| this->getInput(0)->toString(str); |
| str->appendf(")"); |
| } |
| str->append(")"); |
| } |
| #endif |