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| 1 #include "Test.h" |
| 2 #include "TestClassDef.h" |
| 3 |
| 4 #include "SkColorPriv.h" |
| 5 |
| 6 #define ASSERT(expr) REPORTER_ASSERT(r, expr) |
| 7 |
| 8 DEF_TEST(Splay, r) { |
| 9 const SkPMColor color = 0xA1B2C3D4; |
| 10 |
| 11 uint32_t ag, rb; |
| 12 SkSplay(color, &ag, &rb); |
| 13 ASSERT(ag == 0x00A100C3); |
| 14 ASSERT(rb == 0x00B200D4); |
| 15 ASSERT(SkUnsplay(ag << 8, rb << 8) == color); |
| 16 |
| 17 const uint64_t agrb = SkSplay(color); |
| 18 ASSERT(agrb == 0x00A100C300B200D4); |
| 19 ASSERT(SkUnsplay(agrb<<8) == color); |
| 20 } |
| 21 |
| 22 DEF_TEST(FourByteInterp, r) { |
| 23 const SkPMColor src = 0xAB998877, dst = 0x66334455; |
| 24 for (unsigned scale = 0; scale <= 256; scale++) { |
| 25 ASSERT(SkFourByteInterp256(src, dst, scale) == SkFastFourByteInterp256(s
rc, dst, scale)); |
| 26 } |
| 27 |
| 28 for (unsigned scale = 0; scale < 256; scale++) { |
| 29 // SkFourByteInterp and SkFastFourByteInterp convert from [0, 255] to [0
, 256] differently. |
| 30 // In particular, slow may end up a little too high (weirdly, fast is mo
re accurate). |
| 31 const SkPMColor slow = SkFourByteInterp(src, dst, scale); |
| 32 const SkPMColor fast = SkFastFourByteInterp(src, dst, scale); |
| 33 |
| 34 const int deltaA = SkGetPackedA32(slow) - SkGetPackedA32(fast); |
| 35 const int deltaR = SkGetPackedR32(slow) - SkGetPackedR32(fast); |
| 36 const int deltaG = SkGetPackedG32(slow) - SkGetPackedG32(fast); |
| 37 const int deltaB = SkGetPackedB32(slow) - SkGetPackedB32(fast); |
| 38 |
| 39 ASSERT(deltaA == 0 || deltaA == 1); |
| 40 ASSERT(deltaR == 0 || deltaR == 1); |
| 41 ASSERT(deltaG == 0 || deltaG == 1); |
| 42 ASSERT(deltaB == 0 || deltaB == 1); |
| 43 } |
| 44 } |
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