diff options
| author | Brian Paul <[email protected]> | 2010-09-20 13:48:02 -0600 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2010-09-20 13:48:02 -0600 |
| commit | 61fcd9aaa2bf91eb400eeb4df2ab2c7e48b3bb6c (patch) | |
| tree | fdeef8f3437d3f9fd074e9b48538149be8e50e62 | |
| parent | c3982c6bcdeb88f7fb1b20f8bd300db31cd7288d (diff) | |
llvmpipe: implement sprite coord origin modes
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_setup_point.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup_point.c b/src/gallium/drivers/llvmpipe/lp_setup_point.c index f8f411f4f16..bb6b88069bf 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_point.c +++ b/src/gallium/drivers/llvmpipe/lp_setup_point.c @@ -71,7 +71,8 @@ perspective_coef(struct lp_setup_context *setup, const struct point_info *info, unsigned slot, unsigned vert_attr, - unsigned i) + unsigned i, + unsigned sprite_coord_origin) { if (i == 0) { float dadx = FIXED_ONE / (float)info->dx12; @@ -83,14 +84,18 @@ perspective_coef(struct lp_setup_context *setup, dady * ((float)info->v0[0][1] - setup->pixel_offset))); } else if (i == 1) { - float dadx = 0.0f; - float dady = FIXED_ONE / (float)info->dx12; + float dadx = 0.0f; + float dady = FIXED_ONE / (float)info->dx12; + + if (sprite_coord_origin == PIPE_SPRITE_COORD_LOWER_LEFT) { + dady = -dady; + } point->inputs.dadx[slot][i] = dadx; point->inputs.dady[slot][i] = dady; point->inputs.a0[slot][i] = (0.5 - - (dadx * ((float)info->v0[0][0] - setup->pixel_offset) + - dady * ((float)info->v0[0][1] - setup->pixel_offset))); + (dadx * ((float)info->v0[0][0] - setup->pixel_offset) + + dady * ((float)info->v0[0][1] - setup->pixel_offset))); } else if (i == 2) { point->inputs.a0[slot][i] = 0.0f; @@ -187,7 +192,8 @@ setup_point_coefficients( struct lp_setup_context *setup, if (setup->sprite_coord_enable & (1 << index)) { for (i = 0; i < NUM_CHANNELS; i++) if (usage_mask & (1 << i)) - perspective_coef(setup, point, info, slot+1, vert_attr, i); + perspective_coef(setup, point, info, slot+1, vert_attr, i, + setup->sprite_coord_origin); fragcoord_usage_mask |= TGSI_WRITEMASK_W; break; } |