diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_setup_tri.c | 66 |
1 files changed, 30 insertions, 36 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c index cf8643fc63..89d75710dd 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c +++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c @@ -221,8 +221,6 @@ static void setup_tri_coefficients( struct setup_context *setup, -/* XXX: do this by add/subtracting a large floating point number: - */ static inline int subpixel_snap( float a ) { return util_iround(FIXED_ONE * a); @@ -235,15 +233,6 @@ static INLINE void bin_triangle( struct cmd_block_list *list, } -/* to avoid having to allocate power-of-four, square render targets, - * end up having a specialized version of the above that runs only at - * the topmost level. - * - * at the topmost level there may be an arbitary number of steps on - * either dimension, so this loop needs to be either separately - * code-generated and unrolled for each render target size, or kept as - * generic looping code: - */ #define MIN3(a,b,c) MIN2(MIN2(a,b),c) #define MAX3(a,b,c) MAX2(MAX2(a,b),c) @@ -354,11 +343,6 @@ do_triangle_ccw(struct setup_context *setup, tri->ei2 = tri->dx23 - tri->dy23 - tri->eo2; tri->ei3 = tri->dx31 - tri->dy31 - tri->eo3; - minx = tri->minx / TILESIZE; - miny = tri->miny / TILESIZE; - maxx = tri->maxx / TILESIZE; - maxy = tri->maxy / TILESIZE; - { int xstep1 = -tri->dy12; int xstep2 = -tri->dy23; @@ -370,16 +354,37 @@ do_triangle_ccw(struct setup_context *setup, int ix, iy; int i = 0; + + int c1 = 0; + int c2 = 0; + int c3 = 0; for (iy = 0; iy < 4; iy++) { + int cx1 = c1; + int cx2 = c2; + int cx3 = c3; + for (ix = 0; ix < 4; ix++, i++) { - tri->step[0][i] = xstep1 * ix + ystep1 * iy; - tri->step[1][i] = xstep2 * ix + ystep2 * iy; - tri->step[2][i] = xstep3 * ix + ystep3 * iy; + tri->step[0][i] = cx1; + tri->step[1][i] = cx2; + tri->step[2][i] = cx3; + cx1 += xstep1; + cx2 += xstep2; + cx3 += xstep3; } + + c1 += ystep1; + c2 += ystep2; + c3 += ystep3; } } + minx = tri->minx / TILESIZE; + miny = tri->miny / TILESIZE; + maxx = tri->maxx / TILESIZE; + maxy = tri->maxy / TILESIZE; + + /* Convert to tile coordinates: */ if (miny == maxy && minx == maxx) @@ -419,10 +424,7 @@ do_triangle_ccw(struct setup_context *setup, int x, y; - /* Subdivide space into NxM blocks, where each block is square and - * power-of-four in dimension. - * - * Trivially accept or reject blocks, else jump to per-pixel + /* Trivially accept or reject blocks, else jump to per-pixel * examination above. */ for (y = miny; y <= maxy; y++) @@ -430,38 +432,30 @@ do_triangle_ccw(struct setup_context *setup, int cx1 = c1; int cx2 = c2; int cx3 = c3; + int in = 0; for (x = minx; x <= maxx; x++) { - assert(cx1 == - tri->c1 + - tri->dx12 * y * TILESIZE - - tri->dy12 * x * TILESIZE); - assert(cx2 == - tri->c2 + - tri->dx23 * y * TILESIZE - - tri->dy23 * x * TILESIZE); - assert(cx3 == - tri->c3 + - tri->dx31 * y * TILESIZE - - tri->dy31 * x * TILESIZE); - if (cx1 + eo1 < 0 || cx2 + eo2 < 0 || cx3 + eo3 < 0) { /* do nothing */ + if (in) + break; } else if (cx1 + ei1 > 0 && cx2 + ei2 > 0 && cx3 + ei3 > 0) { + in = 1; /* shade whole tile */ bin_command( &setup->tile[x][y], lp_rast_shade_tile, lp_rast_arg_inputs(&tri->inputs) ); } else { + in = 1; /* shade partial tile */ bin_command( &setup->tile[x][y], lp_rast_triangle, |