diff options
| author | Yang Zhao <yang@yangman.ca> | 2009-03-12 18:50:32 -0400 |
|---|---|---|
| committer | Alex Deucher <alexdeucher@gmail.com> | 2009-03-12 18:50:32 -0400 |
| commit | 1fe0dcfe98dfe30499ba53c1f208c4ef10bef001 (patch) | |
| tree | d5716df817fefa32e0a54d9ab4582a9e712fdd0e | |
| parent | f356ca7795531e0c080775efb598141eb7db44ba (diff) | |
R6xx/R7xx shader: Fix OFFSET_[XYZ] macro for TEX_DWORD2 to accept floats
Values for OFFSET_[XYZ] are 5-bits two's-complement fixed-point with
one-bit after decimal point. Values in [-8.0, 7.5] are valid. Inputs
that do not exactly land on 0.5 increments are rounded towards 0 to the
nearest increment.
| -rw-r--r-- | src/r600_shader.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/r600_shader.h b/src/r600_shader.h index ffb50c34..67b64ff6 100644 --- a/src/r600_shader.h +++ b/src/r600_shader.h @@ -326,9 +326,9 @@ #define COORD_TYPE_W(x) (x) #define TEX_UNNORMALIZED 0 #define TEX_NORMALIZED 1 -#define OFFSET_X(x) (x) -#define OFFSET_Y(x) (x) -#define OFFSET_Z(x) (x) +#define OFFSET_X(x) (((int)(x) * 2) & 0x1f) /* 4:1-bits 2's-complement fixed-point: [-8.0..7.5] */ +#define OFFSET_Y(x) (((int)(x) * 2) & 0x1f) +#define OFFSET_Z(x) (((int)(x) * 2) & 0x1f) #define SAMPLER_ID(x) (x) // R7xx has an additional parameter ALT_CONST. We always expose it, but ALT_CONST is R7xx only |