diff options
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_setup_tri.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_setup_tri.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c index f2665c11df..cf86255406 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c @@ -230,6 +230,11 @@ static inline int subpixel_snap( float a ) #define MIN3(a,b,c) MIN2(MIN2(a,b),c) #define MAX3(a,b,c) MAX2(MAX2(a,b),c) +/** + * Do basic setup for triangle rasterization and determine which + * framebuffer tiles are touched. Put the triangle in the bins for the + * tiles which we overlap. + */ static void do_triangle_ccw(struct setup_context *setup, const float (*v1)[4], @@ -237,15 +242,14 @@ do_triangle_ccw(struct setup_context *setup, const float (*v3)[4], boolean frontfacing ) { - + /* x/y positions in fixed point */ + const int x1 = subpixel_snap(v1[0][0]); + const int x2 = subpixel_snap(v2[0][0]); + const int x3 = subpixel_snap(v3[0][0]); const int y1 = subpixel_snap(v1[0][1]); const int y2 = subpixel_snap(v2[0][1]); const int y3 = subpixel_snap(v3[0][1]); - const int x1 = subpixel_snap(v1[0][0]); - const int x2 = subpixel_snap(v2[0][0]); - const int x3 = subpixel_snap(v3[0][0]); - struct lp_rast_triangle *tri = get_data( &setup->data, sizeof *tri ); float area; int minx, maxx, miny, maxy; @@ -270,7 +274,7 @@ do_triangle_ccw(struct setup_context *setup, return; } - // Bounding rectangle + /* Bounding rectangle (in pixels) */ tri->minx = (MIN3(x1, x2, x3) + 0xf) >> FIXED_ORDER; tri->maxx = (MAX3(x1, x2, x3) + 0xf) >> FIXED_ORDER; tri->miny = (MIN3(y1, y2, y3) + 0xf) >> FIXED_ORDER; @@ -372,13 +376,14 @@ do_triangle_ccw(struct setup_context *setup, } } + /* Convert to tile coordinates: + */ minx = tri->minx / TILE_SIZE; miny = tri->miny / TILE_SIZE; maxx = tri->maxx / TILE_SIZE; maxy = tri->maxy / TILE_SIZE; - - /* Convert to tile coordinates: + /* Determine which tile(s) intersect the triangle's bounding box */ if (miny == maxy && minx == maxx) { @@ -442,8 +447,9 @@ do_triangle_ccw(struct setup_context *setup, cx3 + ei3 > 0) { in = 1; - /* shade whole tile */ - bin_command( &setup->tile[x][y], lp_rast_shade_tile, + /* triangle covers the whole tile- shade whole tile */ + bin_command( &setup->tile[x][y], + lp_rast_shade_tile, lp_rast_arg_inputs(&tri->inputs) ); } else |