djsollen | b500ffa | 2015-06-05 09:41:18 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2015 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 "Test.h" |
| 9 | |
| 10 | #include "SkBitmap.h" |
| 11 | #include "SkCanvas.h" |
| 12 | #include "SkColor.h" |
| 13 | #include "SkColorMatrixFilter.h" |
| 14 | #include "SkPaint.h" |
| 15 | |
| 16 | #include <stdlib.h> |
| 17 | |
| 18 | static inline void assert_color(skiatest::Reporter* reporter, |
| 19 | SkColor expected, SkColor actual, int tolerance) { |
| 20 | REPORTER_ASSERT(reporter, abs((int)(SkColorGetA(expected) - SkColorGetA(actual))) <= tolerance); |
| 21 | REPORTER_ASSERT(reporter, abs((int)(SkColorGetR(expected) - SkColorGetR(actual))) <= tolerance); |
| 22 | REPORTER_ASSERT(reporter, abs((int)(SkColorGetG(expected) - SkColorGetG(actual))) <= tolerance); |
| 23 | REPORTER_ASSERT(reporter, abs((int)(SkColorGetB(expected) - SkColorGetB(actual))) <= tolerance); |
| 24 | } |
| 25 | |
| 26 | static inline void assert_color(skiatest::Reporter* reporter, SkColor expected, SkColor actual) { |
| 27 | const int TOLERANCE = 1; |
| 28 | assert_color(reporter, expected, actual, TOLERANCE); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * This test case is a mirror of the Android CTS tests for MatrixColorFilter |
| 33 | * found in the android.graphics.ColorMatrixColorFilterTest class. |
| 34 | */ |
| 35 | static inline void test_colorMatrixCTS(skiatest::Reporter* reporter) { |
| 36 | |
| 37 | SkBitmap bitmap; |
| 38 | bitmap.allocN32Pixels(1,1); |
| 39 | |
| 40 | SkCanvas canvas(bitmap); |
| 41 | SkPaint paint; |
| 42 | |
| 43 | SkScalar blueToCyan[20] = { |
| 44 | 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 45 | 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, |
| 46 | 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| 47 | 0.0f, 0.0f, 0.0f, 1.0f, 0.0f }; |
| 48 | paint.setColorFilter(SkColorMatrixFilter::Create(blueToCyan))->unref(); |
| 49 | |
| 50 | paint.setColor(SK_ColorBLUE); |
| 51 | canvas.drawPoint(0, 0, paint); |
| 52 | assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| 53 | |
| 54 | paint.setColor(SK_ColorGREEN); |
| 55 | canvas.drawPoint(0, 0, paint); |
| 56 | assert_color(reporter, SK_ColorGREEN, bitmap.getColor(0, 0)); |
| 57 | |
| 58 | paint.setColor(SK_ColorRED); |
| 59 | canvas.drawPoint(0, 0, paint); |
| 60 | assert_color(reporter, SK_ColorRED, bitmap.getColor(0, 0)); |
| 61 | |
| 62 | // color components are clipped, not scaled |
| 63 | paint.setColor(SK_ColorMAGENTA); |
| 64 | canvas.drawPoint(0, 0, paint); |
| 65 | assert_color(reporter, SK_ColorWHITE, bitmap.getColor(0, 0)); |
| 66 | |
| 67 | SkScalar transparentRedAddBlue[20] = { |
| 68 | 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 69 | 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, |
| 70 | 0.0f, 0.0f, 1.0f, 0.0f, 64.0f, |
| 71 | -0.5f, 0.0f, 0.0f, 1.0f, 0.0f |
| 72 | }; |
| 73 | paint.setColorFilter(SkColorMatrixFilter::Create(transparentRedAddBlue))->unref(); |
| 74 | bitmap.eraseColor(SK_ColorTRANSPARENT); |
| 75 | |
| 76 | paint.setColor(SK_ColorRED); |
| 77 | canvas.drawPoint(0, 0, paint); |
| 78 | assert_color(reporter, SkColorSetARGB(128, 255, 0, 64), bitmap.getColor(0, 0), 2); |
| 79 | |
| 80 | paint.setColor(SK_ColorCYAN); |
| 81 | canvas.drawPoint(0, 0, paint); |
| 82 | // blue gets clipped |
| 83 | assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| 84 | |
| 85 | // change array to filter out green |
| 86 | REPORTER_ASSERT(reporter, 1.0f == transparentRedAddBlue[6]); |
| 87 | transparentRedAddBlue[6] = 0.0f; |
| 88 | |
| 89 | // check that changing the array has no effect |
| 90 | canvas.drawPoint(0, 0, paint); |
| 91 | assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| 92 | |
| 93 | // create a new filter with the changed matrix |
| 94 | paint.setColorFilter(SkColorMatrixFilter::Create(transparentRedAddBlue))->unref(); |
| 95 | canvas.drawPoint(0, 0, paint); |
| 96 | assert_color(reporter, SK_ColorBLUE, bitmap.getColor(0, 0)); |
| 97 | } |
| 98 | |
| 99 | DEF_TEST(ColorMatrix, reporter) { |
| 100 | test_colorMatrixCTS(reporter); |
| 101 | } |