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 "SkBitmap.h" 9 #include "SkCanvas.h" 10 #include "SkGradientShader.h" 11 #include "SkPaintImageFilter.h" 12 #include "SkShader.h" 13 #include "Test.h" 14 15 static void test_unscaled(skiatest::Reporter* reporter) { 16 int w = 10, h = 10; 17 SkRect r = SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)); 18 19 SkBitmap filterResult, paintResult; 20 21 filterResult.allocN32Pixels(w, h); 22 SkCanvas canvasFilter(filterResult); 23 canvasFilter.clear(0x00000000); 24 25 paintResult.allocN32Pixels(w, h); 26 SkCanvas canvasPaint(paintResult); 27 canvasPaint.clear(0x00000000); 28 29 SkPoint center = SkPoint::Make(SkIntToScalar(5), SkIntToScalar(5)); 30 SkColor colors[] = {SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN}; 31 SkScalar pos[] = {0, SK_ScalarHalf, SK_Scalar1}; 32 SkScalar radius = SkIntToScalar(5); 33 34 SkPaint gradientPaint; 35 gradientPaint.setShader(SkGradientShader::MakeRadial( 36 center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode)); 37 38 // Test using the image filter 39 { 40 SkPaint paint; 41 SkImageFilter::CropRect cr(r); 42 paint.setImageFilter(SkPaintImageFilter::Make(gradientPaint, &cr)); 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 SkPaint gradientPaint; 81 gradientPaint.setShader(SkGradientShader::MakeRadial( 82 center, radius, colors, pos, SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode)); 83 84 // Test using the image filter 85 { 86 SkPaint paint; 87 SkImageFilter::CropRect cr(r); 88 paint.setImageFilter(SkPaintImageFilter::Make(gradientPaint, &cr)); 89 canvasFilter.scale(SkIntToScalar(2), SkIntToScalar(2)); 90 canvasFilter.drawRect(r, paint); 91 } 92 93 // Test using the paint directly 94 { 95 canvasPaint.scale(SkIntToScalar(2), SkIntToScalar(2)); 96 canvasPaint.drawRect(r, gradientPaint); 97 } 98 99 // Assert that both paths yielded the same result 100 for (int y = 0; y < r.height(); ++y) { 101 const SkPMColor* filterPtr = filterResult.getAddr32(0, y); 102 const SkPMColor* paintPtr = paintResult.getAddr32(0, y); 103 for (int x = 0; x < r.width(); ++x, ++filterPtr, ++paintPtr) { 104 REPORTER_ASSERT(reporter, *filterPtr == *paintPtr); 105 } 106 } 107 } 108 109 DEF_TEST(PaintImageFilter, reporter) { 110 test_unscaled(reporter); 111 test_scaled(reporter); 112 } 113
