| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "Test.h" |
| |
| #include "SkBitmap.h" |
| #include "SkCanvas.h" |
| #include "SkColor.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkPaint.h" |
| |
| #include <stdlib.h> |
| |
| static inline void assert_color(skiatest::Reporter* reporter, |
| SkColor expected, SkColor actual, int tolerance) { |
| REPORTER_ASSERT(reporter, abs((int)(SkColorGetA(expected) - SkColorGetA(actual))) <= tolerance); |
| REPORTER_ASSERT(reporter, abs((int)(SkColorGetR(expected) - SkColorGetR(actual))) <= tolerance); |
| REPORTER_ASSERT(reporter, abs((int)(SkColorGetG(expected) - SkColorGetG(actual))) <= tolerance); |
| REPORTER_ASSERT(reporter, abs((int)(SkColorGetB(expected) - SkColorGetB(actual))) <= tolerance); |
| } |
| |
| static inline void assert_color(skiatest::Reporter* reporter, SkColor expected, SkColor actual) { |
| const int TOLERANCE = 1; |
| assert_color(reporter, expected, actual, TOLERANCE); |
| } |
| |
| /** |
| * This test case is a mirror of the Android CTS tests for MatrixColorFilter |
| * found in the android.graphics.ColorMatrixColorFilterTest class. |
| */ |
| static inline void test_colorMatrixCTS(skiatest::Reporter* reporter) { |
| |
| SkBitmap bitmap; |
| bitmap.allocN32Pixels(1,1); |
| |
| SkCanvas canvas(bitmap); |
| SkPaint paint; |
| |
| SkScalar blueToCyan[20] = { |
| 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 0.0f, 1.0f, 0.0f }; |
| paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(blueToCyan)); |
| |
| paint.setColor(SK_ColorBLUE); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| |
| paint.setColor(SK_ColorGREEN); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorGREEN, bitmap.getColor(0, 0)); |
| |
| paint.setColor(SK_ColorRED); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorRED, bitmap.getColor(0, 0)); |
| |
| // color components are clipped, not scaled |
| paint.setColor(SK_ColorMAGENTA); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorWHITE, bitmap.getColor(0, 0)); |
| |
| SkScalar transparentRedAddBlue[20] = { |
| 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, |
| 0.0f, 0.0f, 1.0f, 0.0f, 64.0f, |
| -0.5f, 0.0f, 0.0f, 1.0f, 0.0f |
| }; |
| paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(transparentRedAddBlue)); |
| bitmap.eraseColor(SK_ColorTRANSPARENT); |
| |
| paint.setColor(SK_ColorRED); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SkColorSetARGB(128, 255, 0, 64), bitmap.getColor(0, 0), 2); |
| |
| paint.setColor(SK_ColorCYAN); |
| canvas.drawPoint(0, 0, paint); |
| // blue gets clipped |
| assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| |
| // change array to filter out green |
| REPORTER_ASSERT(reporter, 1.0f == transparentRedAddBlue[6]); |
| transparentRedAddBlue[6] = 0.0f; |
| |
| // check that changing the array has no effect |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorCYAN, bitmap.getColor(0, 0)); |
| |
| // create a new filter with the changed matrix |
| paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(transparentRedAddBlue)); |
| canvas.drawPoint(0, 0, paint); |
| assert_color(reporter, SK_ColorBLUE, bitmap.getColor(0, 0)); |
| } |
| |
| DEF_TEST(ColorMatrix, reporter) { |
| test_colorMatrixCTS(reporter); |
| } |
| |
| |
| DEF_TEST(ColorMatrix_clamp_while_unpremul, r) { |
| // This matrix does green += 255/255 and alpha += 32/255. We want to test |
| // that if we pass it opaque alpha and small red and blue values, red and |
| // blue stay unchanged, not pumped up by that ~1.12 intermediate alpha. |
| SkScalar m[] = { |
| 1, 0, 0, 0, 0, |
| 0, 1, 0, 0, 255, |
| 0, 0, 1, 0, 0, |
| 0, 0, 0, 1, 32, |
| }; |
| auto filter = SkColorFilter::MakeMatrixFilterRowMajor255(m); |
| |
| SkColor filtered = filter->filterColor(0xff0a0b0c); |
| REPORTER_ASSERT(r, SkColorGetA(filtered) == 0xff); |
| REPORTER_ASSERT(r, SkColorGetR(filtered) == 0x0a); |
| REPORTER_ASSERT(r, SkColorGetG(filtered) == 0xff); |
| REPORTER_ASSERT(r, SkColorGetB(filtered) == 0x0c); |
| } |