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update with new tests for srgb conversion

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This commit is contained in:
Sean Barrett 2014-09-11 02:10:37 -07:00
parent 16d68d14f8
commit 7a4f1f4665
1 changed files with 11 additions and 0 deletions
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11
tests/resample_test.cpp
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@ -819,12 +819,23 @@ void test_suite(int argc, char **argv)
}
#endif
// old tests that hacky fix worked on - test that
// every uint8 maps to itself
for (i = 0; i < 256; i++) {
float f = stbir__srgb_to_linear(float(i) / 255);
int n = stbir__linear_to_srgb_uchar(f);
STBIR_ASSERT(n == i);
}
// new tests that hacky fix failed for - test that
// values adjacent to uint8 round to nearest uint8
for (i = 0; i < 256; i++) {
for (float y = -0.49f; y <= 0.491f; y += 0.01f) {
float f = stbir__srgb_to_linear((i+y) / 255.0f);
int n = stbir__linear_to_srgb_uchar(f);
STBIR_ASSERT(n == i);
}
}
test_filters();