diff options
Diffstat (limited to 'src/mesa/main/macros.h')
| -rw-r--r-- | src/mesa/main/macros.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h index 2630855a0e..bfd740870e 100644 --- a/src/mesa/main/macros.h +++ b/src/mesa/main/macros.h @@ -54,13 +54,16 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define FLOAT_TO_BYTE(X) ( (((GLint) (255.0F * (X))) - 1) / 2 ) -/** Convert GLushort in [0,65536] to GLfloat in [0.0,1.0] */ +/** Convert GLushort in [0,65535] to GLfloat in [0.0,1.0] */ #define USHORT_TO_FLOAT(S) ((GLfloat) (S) * (1.0F / 65535.0F)) +/** Convert GLfloat in [0.0,1.0] to GLushort in [0, 65535] */ +#define FLOAT_TO_USHORT(X) ((GLuint) ((X) * 65535.0)) + /** Convert GLshort in [-32768,32767] to GLfloat in [-1.0,1.0] */ #define SHORT_TO_FLOAT(S) ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)) -/** Convert GLfloat in [0.0,1.0] to GLshort in [-32768,32767] */ +/** Convert GLfloat in [-1.0,1.0] to GLshort in [-32768,32767] */ #define FLOAT_TO_SHORT(X) ( (((GLint) (65535.0F * (X))) - 1) / 2 ) |