1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkCanvas.h" 9 #include "SkGradientShader.h" 10 #include "SkPaintImageFilter.h" 11 #include "SkShader.h" 12 #include "Test.h" 13 14 static void test_unscaled(skiatest::Reporter* reporter) { 15 int w = 10, h = 10; 16 SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)); 17 18 SkBitmap filterResult, paintResult; 19 20 filterResult.allocN32Pixels(w, h); 21 SkCanvas canvasFilter(filterResult); 22 canvasFilter.clear(0x00000000); 23 24 paintResult.allocN32Pixels(w, h); 25 SkCanvas canvasPaint(paintResult); 26 canvasPaint.clear(0x00000000); 27 28 SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5)); 29 SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN}; 30 SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1}; 31 SkScalar radius = SkIntToScalar(5); 32 33 SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial( 34 center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode)); 35 SkPaint gradientPaint; 36 gradientPaint.setShader(s); 37 38 // Test using the image filter 39 { 40 SkPaint paint; 41 SkImageFilter::CropRect cr(r); 42 paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref(); 43 canvasFilter.drawRect(r, paint); 44 } 45 46 // Test using the paint directly 47 { 48 canvasPaint.drawRect(r, gradientPaint); 49 } 50 51 // Assert that both paths yielded the same result 52 for (int y = 0; y < r.height(); ++y) { 53 const SkPMColor* filterPtr = filterResult.getAddr32(0, y); 54 const SkPMColor* paintPtr = paintResult.getAddr32(0, y); 55 for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) { 56 REPORTER_ASSERT(reporter, *filterPtr == *paintPtr); 57 } 58 } 59 } 60 61 static void test_scaled(skiatest::Reporter* reporter) { 62 int w = 10, h = 10; 63 SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)); 64 65 SkBitmap filterResult, paintResult; 66 67 filterResult.allocN32Pixels(w, h); 68 SkCanvas canvasFilter(filterResult); 69 canvasFilter.clear(0x00000000); 70 71 paintResult.allocN32Pixels(w, h); 72 SkCanvas canvasPaint(paintResult); 73 canvasPaint.clear(0x00000000); 74 75 SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5)); 76 SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN}; 77 SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1}; 78 SkScalar radius = SkIntToScalar(5); 79 80 SkAutoTUnref<SkShader> s(SkGradientShader::CreateRadial( 81 center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode)); 82 SkPaint gradientPaint; 83 gradientPaint.setShader(s); 84 85 // Test using the image filter 86 { 87 SkPaint paint; 88 SkImageFilter::CropRect cr(r); 89 paint.setImageFilter(SkPaintImageFilter::Create(gradientPaint, &cr))->unref(); 90 canvasFilter.scale(SkIntToScalar(2), SkIntToScalar(2)); 91 canvasFilter.drawRect(r, paint); 92 } 93 94 // Test using the paint directly 95 { 96 canvasPaint.scale(SkIntToScalar(2), SkIntToScalar(2)); 97 canvasPaint.drawRect(r, gradientPaint); 98 } 99 100 // Assert that both paths yielded the same result 101 for (int y = 0; y < r.height(); ++y) { 102 const SkPMColor* filterPtr = filterResult.getAddr32(0, y); 103 const SkPMColor* paintPtr = paintResult.getAddr32(0, y); 104 for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) { 105 REPORTER_ASSERT(reporter, *filterPtr == *paintPtr); 106 } 107 } 108 } 109 110 DEF_TEST(PaintImageFilter, reporter) { 111 test_unscaled(reporter); 112 test_scaled(reporter); 113 } 114
