1 #include "Test.h" 2 3 #include "SkColorPriv.h" 4 5 #define ASSERT(expr) REPORTER_ASSERT(r, expr) 6 7 DEF_TEST(Splay, r) { 8 const SkPMColor color = 0xA1B2C3D4; 9 10 uint32_t ag, rb; 11 SkSplay(color, &ag, &rb); 12 ASSERT(ag == 0x00A100C3); 13 ASSERT(rb == 0x00B200D4); 14 ASSERT(SkUnsplay(ag << 8, rb << 8) == color); 15 16 const uint64_t agrb = SkSplay(color); 17 ASSERT(agrb == 0x00A100C300B200D4ULL); 18 ASSERT(SkUnsplay(agrb<<8) == color); 19 } 20 21 DEF_TEST(FourByteInterp, r) { 22 const SkPMColor src = 0xAB998877, dst = 0x66334455; 23 for (unsigned scale = 0; scale <= 256; scale++) { 24 ASSERT(SkFourByteInterp256(src, dst, scale) == SkFastFourByteInterp256(src, dst, scale)); 25 } 26 27 for (unsigned scale = 0; scale < 256; scale++) { 28 // SkFourByteInterp and SkFastFourByteInterp convert from [0, 255] to [0, 256] differently. 29 // In particular, slow may end up a little too high (weirdly, fast is more accurate). 30 const SkPMColor slow = SkFourByteInterp(src, dst, scale); 31 const SkPMColor fast = SkFastFourByteInterp(src, dst, scale); 32 33 const int deltaA = SkGetPackedA32(slow) - SkGetPackedA32(fast); 34 const int deltaR = SkGetPackedR32(slow) - SkGetPackedR32(fast); 35 const int deltaG = SkGetPackedG32(slow) - SkGetPackedG32(fast); 36 const int deltaB = SkGetPackedB32(slow) - SkGetPackedB32(fast); 37 38 ASSERT(deltaA == 0 || deltaA == 1); 39 ASSERT(deltaR == 0 || deltaR == 1); 40 ASSERT(deltaG == 0 || deltaG == 1); 41 ASSERT(deltaB == 0 || deltaB == 1); 42 } 43 } 44
