diff options
Diffstat (limited to 'tests/general')
| -rw-r--r-- | tests/general/draw-pixels.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/general/draw-pixels.c b/tests/general/draw-pixels.c index 27b16755a..65f512266 100644 --- a/tests/general/draw-pixels.c +++ b/tests/general/draw-pixels.c @@ -37,7 +37,7 @@ #define UBYTE_TO_FLOAT(u) ((float) u / 255.0F) /** Convert GLbyte in [-128,127] to GLfloat in [-1.0,1.0] */ -#define BYTE_TO_FLOAT(B) ((2.0F * (B) + 1.0F) * (1.0F/255.0F)) +#define BYTE_TO_FLOAT(B) ((B) == -128 ? -1.0F : (B) * (1.0F/127.0F)) /** Convert GLushort in [0,65535] to GLfloat in [0.0,1.0] */ #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F)) |