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 == 0x00A100C300B200D4ULL); 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(src, 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 more 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 } 45
