| /* |
| * 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 "SkComposeImageFilter.h" |
| |
| #include "SkReadBuffer.h" |
| #include "SkSpecialImage.h" |
| #include "SkWriteBuffer.h" |
| |
| |
| SkRect SkComposeImageFilter::computeFastBounds(const SkRect& src) const { |
| SkImageFilter* outer = this->getInput(0); |
| SkImageFilter* inner = this->getInput(1); |
| |
| return outer->computeFastBounds(inner->computeFastBounds(src)); |
| } |
| |
| sk_sp<SkSpecialImage> SkComposeImageFilter::onFilterImage(SkSpecialImage* source, |
| const Context& ctx, |
| SkIPoint* offset) const { |
| // The bounds passed to the inner filter must be filtered by the outer |
| // filter, so that the inner filter produces the pixels that the outer |
| // filter requires as input. This matters if the outer filter moves pixels. |
| SkIRect innerClipBounds; |
| innerClipBounds = this->getInput(0)->filterBounds(ctx.clipBounds(), ctx.ctm()); |
| Context innerContext(ctx.ctm(), innerClipBounds, ctx.cache()); |
| SkIPoint innerOffset = SkIPoint::Make(0, 0); |
| sk_sp<SkSpecialImage> inner(this->filterInput(1, source, innerContext, &innerOffset)); |
| if (!inner) { |
| return nullptr; |
| } |
| |
| SkMatrix outerMatrix(ctx.ctm()); |
| outerMatrix.postTranslate(SkIntToScalar(-innerOffset.x()), SkIntToScalar(-innerOffset.y())); |
| SkIRect clipBounds = ctx.clipBounds(); |
| clipBounds.offset(-innerOffset.x(), -innerOffset.y()); |
| Context outerContext(outerMatrix, clipBounds, ctx.cache()); |
| |
| SkIPoint outerOffset = SkIPoint::Make(0, 0); |
| sk_sp<SkSpecialImage> outer(this->filterInput(0, inner.get(), outerContext, &outerOffset)); |
| if (!outer) { |
| return nullptr; |
| } |
| |
| *offset = innerOffset + outerOffset; |
| return outer; |
| } |
| |
| SkIRect SkComposeImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm, |
| MapDirection direction) const { |
| SkImageFilter* outer = this->getInput(0); |
| SkImageFilter* inner = this->getInput(1); |
| |
| return outer->filterBounds(inner->filterBounds(src, ctm, direction), ctm, direction); |
| } |
| |
| SkFlattenable* SkComposeImageFilter::CreateProc(SkReadBuffer& buffer) { |
| SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 2); |
| return SkComposeImageFilter::Make(sk_ref_sp<SkImageFilter>(common.getInput(0)), |
| sk_ref_sp<SkImageFilter>(common.getInput(1))).release(); |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkComposeImageFilter::toString(SkString* str) const { |
| SkImageFilter* outer = getInput(0); |
| SkImageFilter* inner = getInput(1); |
| |
| str->appendf("SkComposeImageFilter: ("); |
| |
| str->appendf("outer: "); |
| outer->toString(str); |
| |
| str->appendf("inner: "); |
| inner->toString(str); |
| |
| str->appendf(")"); |
| } |
| #endif |