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/*
* 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 "SkPMFloat.h"
#include "Test.h"
DEF_TEST(SkPMFloat, r) {
// Test SkPMColor <-> SkPMFloat
SkPMColor c = SkPreMultiplyColor(0xFFCC9933);
SkPMFloat pmf(c);
REPORTER_ASSERT(r, SkScalarNearlyEqual(255.0f, pmf.a()));
REPORTER_ASSERT(r, SkScalarNearlyEqual(204.0f, pmf.r()));
REPORTER_ASSERT(r, SkScalarNearlyEqual(153.0f, pmf.g()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 51.0f, pmf.b()));
REPORTER_ASSERT(r, c == pmf.round());
// Test rounding.
pmf = SkPMFloat(254.5f, 203.5f, 153.1f, 50.8f);
REPORTER_ASSERT(r, c == pmf.round());
pmf = SkPMFloat(255.9f, 204.01f, 153.0f, -0.9f);
REPORTER_ASSERT(r, SkPreMultiplyColor(0xFFCC9900) == pmf.trunc());
// Test clamping.
SkPMFloat clamped(SkPMFloat(510.0f, 153.0f, 1.0f, -0.2f).roundClamp());
REPORTER_ASSERT(r, SkScalarNearlyEqual(255.0f, clamped.a()));
REPORTER_ASSERT(r, SkScalarNearlyEqual(153.0f, clamped.r()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 1.0f, clamped.g()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.0f, clamped.b()));
// Test SkPMFloat <-> Sk4f conversion.
Sk4f fs = clamped;
SkPMFloat scaled = fs * Sk4f(0.25f);
REPORTER_ASSERT(r, SkScalarNearlyEqual(63.75f, scaled.a()));
REPORTER_ASSERT(r, SkScalarNearlyEqual(38.25f, scaled.r()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.25f, scaled.g()));
REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.00f, scaled.b()));
// Test 4-at-a-time conversions.
SkPMColor colors[4] = { 0xFF000000, 0xFFFF0000, 0xFF00FF00, 0xFF0000FF };
SkPMFloat floats[4];
SkPMFloat::From4PMColors(colors, floats+0, floats+1, floats+2, floats+3);
SkPMColor back[4];
SkPMFloat::RoundTo4PMColors(floats[0], floats[1], floats[2], floats[3], back);
for (int i = 0; i < 4; i++) {
REPORTER_ASSERT(r, back[i] == colors[i]);
}
SkPMFloat::RoundClampTo4PMColors(floats[0], floats[1], floats[2], floats[3], back);
for (int i = 0; i < 4; i++) {
REPORTER_ASSERT(r, back[i] == colors[i]);
}
}
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