reed | 6d3cef9 | 2016-01-22 01:04:29 -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 | |
herb | 42da45d | 2016-04-08 14:24:37 -0700 | [diff] [blame] | 8 | #include "SkBitmapProcShader.h" |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 9 | #include "SkColor.h" |
reed | 5f34e8e | 2016-01-23 14:19:06 -0800 | [diff] [blame] | 10 | #include "SkColorMatrixFilter.h" |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 11 | #include "SkGradientShader.h" |
| 12 | #include "SkImage.h" |
reed | dd9ffea | 2016-02-18 12:39:14 -0800 | [diff] [blame] | 13 | #include "SkPM4f.h" |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 14 | #include "SkShader.h" |
| 15 | |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 16 | #include "Test.h" |
| 17 | #include "SkRandom.h" |
| 18 | |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 19 | const float kTolerance = 1.0f / (1 << 20); |
| 20 | |
| 21 | static bool nearly_equal(float a, float b, float tol = kTolerance) { |
| 22 | SkASSERT(tol >= 0); |
| 23 | return fabsf(a - b) <= tol; |
| 24 | } |
| 25 | |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 26 | DEF_TEST(SkColor4f_FromColor, reporter) { |
| 27 | const struct { |
| 28 | SkColor fC; |
| 29 | SkColor4f fC4; |
| 30 | } recs[] = { |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 31 | { SK_ColorBLACK, { 0, 0, 0, 1 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 32 | { SK_ColorWHITE, { 1, 1, 1, 1 } }, |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 33 | { SK_ColorRED, { 1, 0, 0, 1 } }, |
| 34 | { SK_ColorGREEN, { 0, 1, 0, 1 } }, |
| 35 | { SK_ColorBLUE, { 0, 0, 1, 1 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 36 | { 0, { 0, 0, 0, 0 } }, |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 37 | }; |
| 38 | |
| 39 | for (const auto& r : recs) { |
| 40 | SkColor4f c4 = SkColor4f::FromColor(r.fC); |
| 41 | REPORTER_ASSERT(reporter, c4 == r.fC4); |
| 42 | } |
| 43 | } |
| 44 | |
reed | 7f225cf | 2016-01-23 19:37:56 -0800 | [diff] [blame] | 45 | DEF_TEST(Color4f_premul, reporter) { |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 46 | SkRandom rand; |
| 47 | |
| 48 | for (int i = 0; i < 1000000; ++i) { |
| 49 | // First just test opaque colors, so that the premul should be exact |
| 50 | SkColor4f c4 { |
brianosman | e074d1f | 2016-06-24 06:31:47 -0700 | [diff] [blame] | 51 | rand.nextUScalar1(), rand.nextUScalar1(), rand.nextUScalar1(), 1 |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 52 | }; |
| 53 | SkPM4f pm4 = c4.premul(); |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 54 | REPORTER_ASSERT(reporter, pm4.a() == c4.fA); |
| 55 | REPORTER_ASSERT(reporter, pm4.r() == c4.fA * c4.fR); |
| 56 | REPORTER_ASSERT(reporter, pm4.g() == c4.fA * c4.fG); |
| 57 | REPORTER_ASSERT(reporter, pm4.b() == c4.fA * c4.fB); |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 58 | |
| 59 | // We compare with a tolerance, in case our premul multiply is implemented at slightly |
| 60 | // different precision than the test code. |
| 61 | c4.fA = rand.nextUScalar1(); |
| 62 | pm4 = c4.premul(); |
| 63 | REPORTER_ASSERT(reporter, pm4.fVec[SK_A_INDEX] == c4.fA); |
reed | 93bb080 | 2016-03-08 10:09:18 -0800 | [diff] [blame] | 64 | REPORTER_ASSERT(reporter, nearly_equal(pm4.r(), c4.fA * c4.fR)); |
| 65 | REPORTER_ASSERT(reporter, nearly_equal(pm4.g(), c4.fA * c4.fG)); |
| 66 | REPORTER_ASSERT(reporter, nearly_equal(pm4.b(), c4.fA * c4.fB)); |
reed | 6d3cef9 | 2016-01-22 01:04:29 -0800 | [diff] [blame] | 67 | } |
| 68 | } |