diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_rast.h')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_rast.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_rast.h b/src/gallium/drivers/llvmpipe/lp_rast.h index c57f2ea11de..43c598d5117 100644 --- a/src/gallium/drivers/llvmpipe/lp_rast.h +++ b/src/gallium/drivers/llvmpipe/lp_rast.h @@ -46,9 +46,18 @@ struct lp_scene; struct lp_fence; struct cmd_bin; +#define FIXED_TYPE_WIDTH 32 /** For sub-pixel positioning */ #define FIXED_ORDER 4 #define FIXED_ONE (1<<FIXED_ORDER) +/** Maximum length of an edge in a primitive in pixels. + * If the framebuffer is large we have to think about fixed-point + * integer overflow. Coordinates need ((FIXED_TYPE_WIDTH/2) - 1) bits + * to be able to fit product of two such coordinates inside + * FIXED_TYPE_WIDTH, any larger and we could overflow a + * FIXED_TYPE_WIDTH_-bit int. + */ +#define MAX_FIXED_LENGTH (1 << (((FIXED_TYPE_WIDTH/2) - 1) - FIXED_ORDER)) /* Rasterizer output size going to jit fs, width/height */ #define LP_RASTER_BLOCK_SIZE 4 |