77b6ba3b6e
This implements SkPaintImageFilter, and is intended to replace SkRectShaderImageFilter. By allowing a paint and not just a shader as input, this allows consumers to control dithering. BUG=skia:4780 GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1556553002 Review URL: https://codereview.chromium.org/1556553002
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/*
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* Copyright 2016 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 "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkPaintImageFilter.h"
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#include "SkShader.h"
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#include "Test.h"
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static void test_unscaled(skiatest::Reporter* reporter) {
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int w = 10, h = 10;
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SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h));
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SkBitmap filterResult, paintResult;
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filterResult.allocN32Pixels(w, h);
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SkCanvas canvasFilter(filterResult);
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canvasFilter.clear(0x00000000);
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paintResult.allocN32Pixels(w, h);
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SkCanvas canvasPaint(paintResult);
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canvasPaint.clear(0x00000000);
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SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5));
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SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
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SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
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SkScalar radius = SkIntToScalar(5);
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial(
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center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
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SkPaint gradientPaint;
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gradientPaint.setShader(s);
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// Test using the image filter
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{
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SkPaint paint;
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SkImageFilter::CropRect cr(r);
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paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref();
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canvasFilter.drawRect(r, paint);
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}
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// Test using the paint directly
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{
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canvasPaint.drawRect(r, gradientPaint);
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}
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// Assert that both paths yielded the same result
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for (int y = 0; y < r.height(); ++y) {
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const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
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const SkPMColor* paintPtr = paintResult.getAddr32(0, y);
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for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) {
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REPORTER_ASSERT(reporter, *filterPtr == *paintPtr);
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}
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}
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}
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static void test_scaled(skiatest::Reporter* reporter) {
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int w = 10, h = 10;
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SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h));
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SkBitmap filterResult, paintResult;
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filterResult.allocN32Pixels(w, h);
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SkCanvas canvasFilter(filterResult);
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canvasFilter.clear(0x00000000);
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paintResult.allocN32Pixels(w, h);
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SkCanvas canvasPaint(paintResult);
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canvasPaint.clear(0x00000000);
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SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5));
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SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN};
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SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1};
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SkScalar radius = SkIntToScalar(5);
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SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial(
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center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode));
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SkPaint gradientPaint;
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gradientPaint.setShader(s);
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// Test using the image filter
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{
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SkPaint paint;
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SkImageFilter::CropRect cr(r);
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paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref();
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canvasFilter.scale(SkIntToScalar(2), SkIntToScalar(2));
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canvasFilter.drawRect(r, paint);
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}
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// Test using the paint directly
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{
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canvasPaint.scale(SkIntToScalar(2), SkIntToScalar(2));
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canvasPaint.drawRect(r, gradientPaint);
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}
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// Assert that both paths yielded the same result
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for (int y = 0; y < r.height(); ++y) {
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const SkPMColor* filterPtr = filterResult.getAddr32(0, y);
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const SkPMColor* paintPtr = paintResult.getAddr32(0, y);
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for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) {
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REPORTER_ASSERT(reporter, *filterPtr == *paintPtr);
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}
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}
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}
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DEF_TEST(PaintImageFilter, reporter) {
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test_unscaled(reporter);
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test_scaled(reporter);
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}
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