79 lines
3.0 KiB
C++
79 lines
3.0 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/gm.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTileMode.h"
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#include "tools/Resources.h"
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#include "tools/ToolUtils.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(ToolUtils::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::Translate(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(SkSamplingOptions(), &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(SkSamplingOptions(), &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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SkTileMode 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], SkSamplingOptions(), &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], SkSamplingOptions(), &matrix));
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canvas->drawIRect(SkIRect::MakeWH(250, 250), paint);
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}
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DEF_SIMPLE_GM(localmatriximageshader_filtering, canvas, 256, 256) {
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// Test that filtering decisions (eg bicubic for upscale) are made correctly when the scale
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// comes from a local matrix shader.
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auto image = GetResourceAsImage("images/mandrill_256.png");
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SkPaint p;
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SkMatrix m = SkMatrix::Scale(2, 2);
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p.setShader(image->makeShader(SkSamplingOptions(SkCubicResampler::Mitchell()))
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->makeWithLocalMatrix(m));
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canvas->drawRect(SkRect::MakeXYWH(0, 0, 256, 256), p);
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}
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