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/*
* Copyright 2017 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 "SkColorData.h"
#define ASSERT(expr) REPORTER_ASSERT(r, expr)
DEF_TEST(Splay, r) {
const SkPMColor color = 0xA1B2C3D4;
uint32_t ag, rb;
SkSplay(color, &ag, &rb);
ASSERT(ag == 0x00A100C3);
ASSERT(rb == 0x00B200D4);
ASSERT(SkUnsplay(ag << 8, rb << 8) == color);
const uint64_t agrb = SkSplay(color);
ASSERT(agrb == 0x00A100C300B200D4ULL);
ASSERT(SkUnsplay(agrb<<8) == color);
}
DEF_TEST(FourByteInterp, r) {
const SkPMColor src = 0xAB998877, dst = 0x66334455;
for (unsigned scale = 0; scale <= 256; scale++) {
ASSERT(SkFourByteInterp256(src, dst, scale) == SkFastFourByteInterp256(src, dst, scale));
}
for (unsigned scale = 0; scale < 256; scale++) {
// SkFourByteInterp and SkFastFourByteInterp convert from [0, 255] to [0, 256] differently.
// In particular, slow may end up a little too high (weirdly, fast is more accurate).
const SkPMColor slow = SkFourByteInterp(src, dst, scale);
const SkPMColor fast = SkFastFourByteInterp(src, dst, scale);
const int deltaA = SkGetPackedA32(slow) - SkGetPackedA32(fast);
const int deltaR = SkGetPackedR32(slow) - SkGetPackedR32(fast);
const int deltaG = SkGetPackedG32(slow) - SkGetPackedG32(fast);
const int deltaB = SkGetPackedB32(slow) - SkGetPackedB32(fast);
ASSERT(deltaA == 0 || deltaA == 1);
ASSERT(deltaR == 0 || deltaR == 1);
ASSERT(deltaG == 0 || deltaG == 1);
ASSERT(deltaB == 0 || deltaB == 1);
}
}
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