diff options
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_pipe_clip.c | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/src/gallium/auxiliary/draw/draw_pipe_clip.c b/src/gallium/auxiliary/draw/draw_pipe_clip.c index 1cf6ee7a7f9..8a3d499febb 100644 --- a/src/gallium/auxiliary/draw/draw_pipe_clip.c +++ b/src/gallium/auxiliary/draw/draw_pipe_clip.c @@ -68,8 +68,7 @@ struct clip_stage { }; -/* This is a bit confusing: - */ +/** Cast wrapper */ static INLINE struct clip_stage *clip_stage( struct draw_stage *stage ) { return (struct clip_stage *)stage; @@ -81,18 +80,22 @@ static INLINE struct clip_stage *clip_stage( struct draw_stage *stage ) /* All attributes are float[4], so this is easy: */ -static void interp_attr( float *fdst, +static void interp_attr( float dst[4], float t, - const float *fin, - const float *fout ) + const float in[4], + const float out[4] ) { - fdst[0] = LINTERP( t, fout[0], fin[0] ); - fdst[1] = LINTERP( t, fout[1], fin[1] ); - fdst[2] = LINTERP( t, fout[2], fin[2] ); - fdst[3] = LINTERP( t, fout[3], fin[3] ); + dst[0] = LINTERP( t, out[0], in[0] ); + dst[1] = LINTERP( t, out[1], in[1] ); + dst[2] = LINTERP( t, out[2], in[2] ); + dst[3] = LINTERP( t, out[3], in[3] ); } +/** + * Copy front/back, primary/secondary colors from src vertex to dst vertex. + * Used when flat shading. + */ static void copy_colors( struct draw_stage *stage, struct vertex_header *dst, const struct vertex_header *src ) @@ -121,20 +124,17 @@ static void interp( const struct clip_stage *clip, /* Vertex header. */ - { - dst->clipmask = 0; - dst->edgeflag = 0; /* will get overwritten later */ - dst->pad = 0; - dst->vertex_id = UNDEFINED_VERTEX_ID; - } + dst->clipmask = 0; + dst->edgeflag = 0; /* will get overwritten later */ + dst->pad = 0; + dst->vertex_id = UNDEFINED_VERTEX_ID; - /* Clip coordinates: interpolate normally + /* Interpolate the clip-space coords. */ - { - interp_attr(dst->clip, t, in->clip, out->clip); - } + interp_attr(dst->clip, t, in->clip, out->clip); - /* Do the projective divide and insert window coordinates: + /* Do the projective divide and viewport transformation to get + * new window coordinates: */ { const float *pos = dst->clip; |