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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColorSpace.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageGenerator.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTypes.h"
- #include "src/core/SkMakeUnique.h"
- #include "tools/ToolUtils.h"
- namespace {
- const SkISize kSize = SkISize::Make(100, 100);
- const SkIRect kSubset = SkIRect::MakeLTRB(25, 25, 75, 75);
- const SkRect kDest = SkRect::MakeXYWH(10, 10, 100, 100);
- sk_sp<SkImage> make_mask(const sk_sp<SkSurface>& surface) {
- ToolUtils::draw_checkerboard(surface->getCanvas(), 0x80808080, 0x00000000, 5);
- return surface->makeImageSnapshot();
- }
- class MaskGenerator final : public SkImageGenerator {
- public:
- MaskGenerator(const SkImageInfo& info) : INHERITED(info) {}
- bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, const Options&)
- override {
- SkImageInfo surfaceInfo = info;
- if (kAlpha_8_SkColorType == info.colorType()) {
- surfaceInfo = surfaceInfo.makeColorSpace(nullptr);
- }
- make_mask(SkSurface::MakeRasterDirect(surfaceInfo, pixels, rowBytes));
- return true;
- }
- private:
- typedef SkImageGenerator INHERITED;
- };
- using MakerT = sk_sp<SkImage>(*)(SkCanvas*, const SkImageInfo&);
- const MakerT makers[] = {
- // SkImage_Raster
- [](SkCanvas*, const SkImageInfo& info) -> sk_sp<SkImage> {
- return make_mask(SkSurface::MakeRaster(info));
- },
- // SkImage_Gpu
- [](SkCanvas* c, const SkImageInfo& info) -> sk_sp<SkImage> {
- sk_sp<SkSurface> surface;
- surface = SkSurface::MakeRenderTarget(c->getGrContext(), SkBudgeted::kNo, info);
- return make_mask(surface ? surface : SkSurface::MakeRaster(info));
- },
- // SkImage_Lazy
- [](SkCanvas*, const SkImageInfo& info) -> sk_sp<SkImage> {
- return SkImage::MakeFromGenerator(skstd::make_unique<MaskGenerator>(info));
- },
- };
- } // anonymous ns
- // Checks whether subset SkImages preserve the original color type (A8 in this case).
- DEF_SIMPLE_GM(imagemasksubset, canvas, 480, 480) {
- SkPaint paint;
- paint.setColor(0xff00ff00);
- const SkImageInfo info = SkImageInfo::MakeA8(kSize.width(), kSize.height());
- for (size_t i = 0; i < SK_ARRAY_COUNT(makers); ++i) {
- sk_sp<SkImage> image = makers[i](canvas, info);
- if (image) {
- canvas->drawImageRect(image, SkRect::Make(kSubset), kDest, &paint);
- sk_sp<SkImage> subset = image->makeSubset(kSubset);
- canvas->drawImageRect(subset, kDest.makeOffset(kSize.width() * 1.5f, 0), &paint);
- }
- canvas->translate(0, kSize.height() * 1.5f);
- }
- }
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