diff options
Diffstat (limited to 'tests/Float16Test.cpp')
-rw-r--r-- | tests/Float16Test.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/Float16Test.cpp b/tests/Float16Test.cpp index f437268c79..f96d904567 100644 --- a/tests/Float16Test.cpp +++ b/tests/Float16Test.cpp @@ -10,6 +10,7 @@ #include "SkHalf.h" #include "SkOpts.h" #include "SkPixmap.h" +#include "SkRandom.h" static bool eq_within_half_float(float a, float b) { const float kTolerance = 1.0f / (1 << (8 + 10)); @@ -64,3 +65,37 @@ DEF_TEST(float_to_half, reporter) { SkOpts::half_to_float(fscratch, hs, 7); REPORTER_ASSERT(reporter, 0 == memcmp(fscratch, fs, sizeof(fs))); } + +DEF_TEST(HalfToFloat_01, r) { + for (uint16_t h = 0; h < 0x8000; h++) { + float f = SkHalfToFloat(h); + if (f >= 0 && f <= 1) { + REPORTER_ASSERT(r, SkHalfToFloat_01(h)[0] == f); + REPORTER_ASSERT(r, SkFloatToHalf_01(SkHalfToFloat_01(h)) == h); + } + } +} + +DEF_TEST(FloatToHalf_01, r) { +#if 0 + for (uint32_t bits = 0; bits < 0x80000000; bits++) { +#else + SkRandom rand; + for (int i = 0; i < 1000000; i++) { + uint32_t bits = rand.nextU(); +#endif + float f; + memcpy(&f, &bits, 4); + if (f >= 0 && f <= 1) { + uint16_t h1 = (uint16_t)SkFloatToHalf_01(Sk4f(f,0,0,0)), + h2 = SkFloatToHalf(f); + bool ok = (h1 == h2 || h1 == h2-1); + REPORTER_ASSERT(r, ok); + if (!ok) { + SkDebugf("%08x (%d) -> %04x (%d), want %04x (%d)\n", + bits, bits>>23, h1, h1>>10, h2, h2>>10); + break; + } + } + } +} |