| /* |
| * Copyright 2021 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkSamplingOptions.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "modules/svg/include/SkSVGFeImage.h" |
| #include "modules/svg/include/SkSVGFilterContext.h" |
| #include "modules/svg/include/SkSVGImage.h" |
| #include "modules/svg/include/SkSVGRenderContext.h" |
| #include "modules/svg/include/SkSVGValue.h" |
| |
| bool SkSVGFeImage::parseAndSetAttribute(const char* n, const char* v) { |
| return INHERITED::parseAndSetAttribute(n, v) || |
| this->setHref(SkSVGAttributeParser::parse<SkSVGIRI>("xlink:href", n, v)) || |
| this->setPreserveAspectRatio(SkSVGAttributeParser::parse<SkSVGPreserveAspectRatio>( |
| "preserveAspectRatio", n, v)); |
| } |
| |
| sk_sp<SkImageFilter> SkSVGFeImage::onMakeImageFilter(const SkSVGRenderContext& ctx, |
| const SkSVGFilterContext& fctx) const { |
| // Load image and map viewbox (image bounds) to viewport (filter effects subregion). |
| const SkRect viewport = this->resolveFilterSubregion(ctx, fctx); |
| const auto imgInfo = |
| SkSVGImage::LoadImage(ctx.resourceProvider(), fHref, viewport, fPreserveAspectRatio); |
| if (!imgInfo.fImage) { |
| return nullptr; |
| } |
| |
| // Create the image filter mapped according to aspect ratio |
| const SkRect srcRect = SkRect::Make(imgInfo.fImage->bounds()); |
| const SkRect& dstRect = imgInfo.fDst; |
| // TODO: image-rendering property |
| auto imgfilt = SkImageFilters::Image(imgInfo.fImage, srcRect, dstRect, |
| SkSamplingOptions(SkFilterMode::kLinear, |
| SkMipmapMode::kNearest)); |
| |
| // Aspect ratio mapping may end up drawing content outside of the filter effects region, |
| // so perform an explicit crop. |
| return SkImageFilters::Merge(&imgfilt, 1, fctx.filterEffectsRegion()); |
| } |