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Unified Diff: tests/SkColor4fTest.cpp

Issue 1623453002: Revert of experiment: float color components (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 4 years, 11 months ago
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Index: tests/SkColor4fTest.cpp
diff --git a/tests/SkColor4fTest.cpp b/tests/SkColor4fTest.cpp
deleted file mode 100644
index b09b0c479a055907271bd753bec4737f061de5e6..0000000000000000000000000000000000000000
--- a/tests/SkColor4fTest.cpp
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * 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));
- }
-}
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