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 } 102
