53 lines
1.8 KiB
C++
53 lines
1.8 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "include/core/SkColor.h"
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#include "include/core/SkColorPriv.h"
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#include "include/core/SkTypes.h"
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#include "include/private/SkColorData.h"
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#include "tests/Test.h"
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#define ASSERT(expr) REPORTER_ASSERT(r, expr)
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DEF_TEST(Splay, r) {
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const SkPMColor color = 0xA1B2C3D4;
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uint32_t ag, rb;
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SkSplay(color, &ag, &rb);
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ASSERT(ag == 0x00A100C3);
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ASSERT(rb == 0x00B200D4);
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ASSERT(SkUnsplay(ag << 8, rb << 8) == color);
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const uint64_t agrb = SkSplay(color);
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ASSERT(agrb == 0x00A100C300B200D4ULL);
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ASSERT(SkUnsplay(agrb<<8) == color);
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}
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DEF_TEST(FourByteInterp, r) {
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const SkPMColor src = 0xAB998877, dst = 0x66334455;
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for (unsigned scale = 0; scale <= 256; scale++) {
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ASSERT(SkFourByteInterp256(src, dst, scale) == SkFastFourByteInterp256(src, dst, scale));
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}
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for (unsigned scale = 0; scale < 256; scale++) {
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// SkFourByteInterp and SkFastFourByteInterp convert from [0, 255] to [0, 256] differently.
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// In particular, slow may end up a little too high (weirdly, fast is more accurate).
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const SkPMColor slow = SkFourByteInterp(src, dst, scale);
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const SkPMColor fast = SkFastFourByteInterp(src, dst, scale);
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const int deltaA = SkGetPackedA32(slow) - SkGetPackedA32(fast);
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const int deltaR = SkGetPackedR32(slow) - SkGetPackedR32(fast);
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const int deltaG = SkGetPackedG32(slow) - SkGetPackedG32(fast);
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const int deltaB = SkGetPackedB32(slow) - SkGetPackedB32(fast);
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ASSERT(deltaA == 0 || deltaA == 1);
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ASSERT(deltaR == 0 || deltaR == 1);
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ASSERT(deltaG == 0 || deltaG == 1);
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ASSERT(deltaB == 0 || deltaB == 1);
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}
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}
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