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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 "include/core/SkColor.h"
- #include "include/core/SkColorPriv.h"
- #include "include/core/SkTypes.h"
- #include "include/private/SkColorData.h"
- #include "tests/Test.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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