diff options
| author | Eric Anholt <[email protected]> | 2010-07-26 17:47:59 -0700 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2010-07-26 17:53:27 -0700 |
| commit | afe125e0a18ac3886c45c7e6b02b122fb2d327b5 (patch) | |
| tree | 78621707e71154c0b388b0baacffc26432b7e992 /src/mesa/main/macros.h | |
| parent | d64343f1ae84979bd154475badf11af8a9bfc2eb (diff) | |
| parent | 5403ca79b225605c79f49866a6497c97da53be3b (diff) | |
Merge remote branch 'origin/master' into glsl2
This pulls in multiple i965 driver fixes which will help ensure better
testing coverage during development, and also gets past the conflicts
of the src/mesa/shader -> src/mesa/program move.
Conflicts:
src/mesa/Makefile
src/mesa/main/shaderapi.c
src/mesa/main/shaderobj.h
Diffstat (limited to 'src/mesa/main/macros.h')
| -rw-r--r-- | src/mesa/main/macros.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h index 40e17e53d6c..b2ec0ba9b73 100644 --- a/src/mesa/main/macros.h +++ b/src/mesa/main/macros.h @@ -130,6 +130,41 @@ extern GLfloat _mesa_ubyte_to_float_color_tab[256]; #define UNCLAMPED_FLOAT_TO_SHORT(s, f) \ s = ( (GLshort) IROUND( CLAMP((f), -1.0F, 1.0F) * 32767.0F) ) +/*** + *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255] + *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255] + ***/ +#if defined(USE_IEEE) && !defined(DEBUG) +#define IEEE_0996 0x3f7f0000 /* 0.996 or so */ +/* This function/macro is sensitive to precision. Test very carefully + * if you change it! + */ +#define UNCLAMPED_FLOAT_TO_UBYTE(UB, F) \ + do { \ + fi_type __tmp; \ + __tmp.f = (F); \ + if (__tmp.i < 0) \ + UB = (GLubyte) 0; \ + else if (__tmp.i >= IEEE_0996) \ + UB = (GLubyte) 255; \ + else { \ + __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ + } \ + } while (0) +#define CLAMPED_FLOAT_TO_UBYTE(UB, F) \ + do { \ + fi_type __tmp; \ + __tmp.f = (F) * (255.0F/256.0F) + 32768.0F; \ + UB = (GLubyte) __tmp.i; \ + } while (0) +#else +#define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \ + ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F)) +#define CLAMPED_FLOAT_TO_UBYTE(ub, f) \ + ub = ((GLubyte) IROUND((f) * 255.0F)) +#endif + /*@}*/ |