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- /*
- * Copyright 2018 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/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTypes.h"
- #include "tools/ToolUtils.h"
- static sk_sp<SkImage> make_image(SkCanvas* rootCanvas) {
- static constexpr SkScalar kSize = 50;
- SkImageInfo info = SkImageInfo::MakeN32Premul(kSize, kSize);
- auto surface = ToolUtils::makeSurface(rootCanvas, info);
- SkPaint p;
- p.setAntiAlias(true);
- p.setColor(SK_ColorGREEN);
- surface->getCanvas()->drawCircle(kSize / 2, kSize / 2, kSize / 2, p);
- p.setStyle(SkPaint::kStroke_Style);
- p.setColor(SK_ColorRED);
- surface->getCanvas()->drawLine(kSize * .25f, kSize * .50f, kSize * .75f, kSize * .50f, p);
- surface->getCanvas()->drawLine(kSize * .50f, kSize * .25f, kSize * .50f, kSize * .75f, p);
- return surface->makeImageSnapshot();
- }
- DEF_SIMPLE_GM(localmatrixshader_nested, canvas, 450, 1200) {
- auto image = make_image(canvas);
- using FactoryT = sk_sp<SkShader> (*)(const sk_sp<SkImage>&,
- const SkMatrix& inner,
- const SkMatrix& outer);
- static const FactoryT gFactories[] = {
- // SkLocalMatrixShader(SkImageShader(inner), outer)
- [](const sk_sp<SkImage>& img, const SkMatrix& inner, const SkMatrix& outer) {
- return img->makeShader(&inner)->makeWithLocalMatrix(outer);
- },
- // SkLocalMatrixShader(SkLocalMatrixShader(SkImageShader(I), inner), outer)
- [](const sk_sp<SkImage>& img, const SkMatrix& inner, const SkMatrix& outer) {
- return img->makeShader()->makeWithLocalMatrix(inner)->makeWithLocalMatrix(outer);
- },
- // SkLocalMatrixShader(SkComposeShader(SkImageShader(inner)), outer)
- [](const sk_sp<SkImage>& img, const SkMatrix& inner, const SkMatrix& outer) {
- return SkShaders::Blend(SkBlendMode::kSrcOver,
- SkShaders::Color(SK_ColorTRANSPARENT),
- img->makeShader(&inner))
- ->makeWithLocalMatrix(outer);
- },
- // SkLocalMatrixShader(SkComposeShader(SkLocalMatrixShader(SkImageShader(I), inner)), outer)
- [](const sk_sp<SkImage>& img, const SkMatrix& inner, const SkMatrix& outer) {
- return SkShaders::Blend(SkBlendMode::kSrcOver,
- SkShaders::Color(SK_ColorTRANSPARENT),
- img->makeShader()->makeWithLocalMatrix(inner))
- ->makeWithLocalMatrix(outer);
- },
- };
- static const auto inner = SkMatrix::MakeScale(2, 2),
- outer = SkMatrix::MakeTrans(20, 20);
- SkPaint border;
- border.setAntiAlias(true);
- border.setStyle(SkPaint::kStroke_Style);
- auto rect = SkRect::Make(image->bounds());
- SkAssertResult(SkMatrix::Concat(inner, outer).mapRect(&rect));
- const auto drawColumn = [&]() {
- SkAutoCanvasRestore acr(canvas, true);
- for (const auto& f : gFactories) {
- SkPaint p;
- p.setShader(f(image, inner, outer));
- canvas->drawRect(rect, p);
- canvas->drawRect(rect, border);
- canvas->translate(0, rect.height() * 1.5f);
- }
- };
- drawColumn();
- {
- SkAutoCanvasRestore acr(canvas, true);
- canvas->translate(0, rect.height() * SK_ARRAY_COUNT(gFactories) * 1.5f);
- drawColumn();
- }
- canvas->translate(rect.width() * 1.5f, 0);
- canvas->scale(2, 2);
- drawColumn();
- }
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