46596ae505
Bug: skia: Change-Id: Ia93ee09dd213b8d6ad5c18e887add5ff3448c824 Reviewed-on: https://skia-review.googlesource.com/90243 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Mike Reed <reed@google.com>
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkSurface.h"
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#include "sk_tool_utils.h"
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static sk_sp<SkImage> make_image(SkCanvas* rootCanvas, SkColor color) {
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SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
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auto surface(sk_tool_utils::makeSurface(rootCanvas, info));
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(color);
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surface->getCanvas()->drawIRect(SkIRect::MakeXYWH(25, 25, 50, 50), paint);
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return surface->makeImageSnapshot();
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}
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DEF_SIMPLE_GM(localmatriximageshader, canvas, 250, 250) {
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sk_sp<SkImage> redImage = make_image(canvas, SK_ColorRED);
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SkMatrix translate = SkMatrix::MakeTrans(100.0f, 0.0f);
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SkMatrix rotate;
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rotate.setRotate(45.0f);
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sk_sp<SkShader> redImageShader = redImage->makeShader(&translate);
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sk_sp<SkShader> redLocalMatrixShader = redImageShader->makeWithLocalMatrix(rotate);
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// Rotate about the origin will happen first.
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SkPaint paint;
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paint.setShader(redLocalMatrixShader);
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canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
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sk_sp<SkImage> blueImage = make_image(canvas, SK_ColorBLUE);
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sk_sp<SkShader> blueImageShader = blueImage->makeShader(&rotate);
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sk_sp<SkShader> blueLocalMatrixShader = blueImageShader->makeWithLocalMatrix(translate);
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// Translate will happen first.
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paint.setShader(blueLocalMatrixShader);
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canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
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canvas->translate(100.0f, 0.0f);
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// Use isAImage() and confirm that the shaders will draw exactly the same (to the right by 100).
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SkShader::TileMode mode[2];
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SkMatrix matrix;
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SkImage* image = redLocalMatrixShader->isAImage(&matrix, mode);
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paint.setShader(image->makeShader(mode[0], mode[1], &matrix));
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canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
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image = blueLocalMatrixShader->isAImage(&matrix, mode);
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paint.setShader(image->makeShader(mode[0], mode[1], &matrix));
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canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
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}
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