diff options
author | reed <reed@google.com> | 2016-01-22 01:04:29 -0800 |
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committer | Commit bot <commit-bot@chromium.org> | 2016-01-22 01:04:29 -0800 |
commit | 6d3cef930ad19b0f55543ca40f7a07030f4fe508 (patch) | |
tree | b9fca9f635a8a01c4e998e1da44caad648ce672d /tests | |
parent | 2a2bdc698460c38ac9e24ba4abdeefec67bcba37 (diff) |
Revert[2] of float color components
This reverts commit 2a2bdc698460c38ac9e24ba4abdeefec67bcba37.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1622483002
TBR=
NOTRY=True
Test-Ubuntu-GCC-ShuttleA-GPU-GTX660-x86_64-Release-Trybot seems wicked slow
Review URL: https://codereview.chromium.org/1622483002
Diffstat (limited to 'tests')
-rw-r--r-- | tests/SkColor4fTest.cpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/tests/SkColor4fTest.cpp b/tests/SkColor4fTest.cpp new file mode 100644 index 0000000000..b09b0c479a --- /dev/null +++ b/tests/SkColor4fTest.cpp @@ -0,0 +1,62 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkColor.h" +#include "SkShader.h" +#include "SkColorMatrixFilter.h" +#include "Test.h" +#include "SkRandom.h" + +DEF_TEST(SkColor4f_FromColor, reporter) { + const struct { + SkColor fC; + SkColor4f fC4; + } recs[] = { + { SK_ColorBLACK, { 1, 0, 0, 0 } }, + { SK_ColorWHITE, { 1, 1, 1, 1 } }, + { SK_ColorRED, { 1, 1, 0, 0 } }, + { SK_ColorGREEN, { 1, 0, 1, 0 } }, + { SK_ColorBLUE, { 1, 0, 0, 1 } }, + { 0, { 0, 0, 0, 0 } }, + { 0x55AAFF00, { 1/3.0f, 2/3.0f, 1, 0 } }, + }; + + for (const auto& r : recs) { + SkColor4f c4 = SkColor4f::FromColor(r.fC); + REPORTER_ASSERT(reporter, c4 == r.fC4); + } +} + +static bool nearly_equal(float a, float b) { + const float kTolerance = 1.0f / (1 << 20); + return fabsf(a - b) < kTolerance; +} + +DEF_TEST(SkColor4f_premul, reporter) { + SkRandom rand; + + for (int i = 0; i < 1000000; ++i) { + // First just test opaque colors, so that the premul should be exact + SkColor4f c4 { + 1, rand.nextUScalar1(), rand.nextUScalar1(), rand.nextUScalar1() + }; + SkPM4f pm4 = c4.premul(); + REPORTER_ASSERT(reporter, pm4.fVec[SK_A_INDEX] == c4.fA); + REPORTER_ASSERT(reporter, pm4.fVec[SK_R_INDEX] == c4.fA * c4.fR); + REPORTER_ASSERT(reporter, pm4.fVec[SK_G_INDEX] == c4.fA * c4.fG); + REPORTER_ASSERT(reporter, pm4.fVec[SK_B_INDEX] == c4.fA * c4.fB); + + // We compare with a tolerance, in case our premul multiply is implemented at slightly + // different precision than the test code. + c4.fA = rand.nextUScalar1(); + pm4 = c4.premul(); + REPORTER_ASSERT(reporter, pm4.fVec[SK_A_INDEX] == c4.fA); + REPORTER_ASSERT(reporter, nearly_equal(pm4.fVec[SK_R_INDEX], c4.fA * c4.fR)); + REPORTER_ASSERT(reporter, nearly_equal(pm4.fVec[SK_G_INDEX], c4.fA * c4.fG)); + REPORTER_ASSERT(reporter, nearly_equal(pm4.fVec[SK_B_INDEX], c4.fA * c4.fB)); + } +} |