diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_vs.h')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_vs.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vs.h b/src/gallium/auxiliary/draw/draw_vs.h index 4ee7e705e93..33ce1e335e0 100644 --- a/src/gallium/auxiliary/draw/draw_vs.h +++ b/src/gallium/auxiliary/draw/draw_vs.h @@ -31,6 +31,10 @@ #ifndef DRAW_VS_H #define DRAW_VS_H +#include "draw_context.h" +#include "draw_private.h" + + struct draw_vertex_shader; struct draw_context; struct pipe_shader_state; @@ -47,4 +51,33 @@ struct draw_vertex_shader * draw_create_vs_llvm(struct draw_context *draw, const struct pipe_shader_state *templ); + +/* Should be part of the generated shader: + */ +static INLINE unsigned +compute_clipmask(const float *clip, /*const*/ float plane[][4], unsigned nr) +{ + unsigned mask = 0x0; + unsigned i; + + /* Do the hardwired planes first: + */ + if (-clip[0] + clip[3] < 0) mask |= CLIP_RIGHT_BIT; + if ( clip[0] + clip[3] < 0) mask |= CLIP_LEFT_BIT; + if (-clip[1] + clip[3] < 0) mask |= CLIP_TOP_BIT; + if ( clip[1] + clip[3] < 0) mask |= CLIP_BOTTOM_BIT; + if (-clip[2] + clip[3] < 0) mask |= CLIP_FAR_BIT; + if ( clip[2] + clip[3] < 0) mask |= CLIP_NEAR_BIT; + + /* Followed by any remaining ones: + */ + for (i = 6; i < nr; i++) { + if (dot4(clip, plane[i]) < 0) + mask |= (1<<i); + } + + return mask; +} + + #endif |