ajuma | 77b6ba3 | 2016-01-08 14:58:35 -0800 | [diff] [blame^] | 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 | } |