From 8e33194837dd206d920889851d9cf22190100c99 Mon Sep 17 00:00:00 2001 From: Keith Whitwell Date: Wed, 2 Apr 2008 11:38:33 +0100 Subject: gallium: add a flag to turn on gl rasterization rules Use this to set up hardware rasterization (if your hardware can do it) or otherwise turn on various tweaks in the draw module. Currently only hooked up to point biasing code. --- src/gallium/auxiliary/draw/draw_wide_point.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'src/gallium/auxiliary') diff --git a/src/gallium/auxiliary/draw/draw_wide_point.c b/src/gallium/auxiliary/draw/draw_wide_point.c index 86281ca3d8..6fc7c9fcd7 100644 --- a/src/gallium/auxiliary/draw/draw_wide_point.c +++ b/src/gallium/auxiliary/draw/draw_wide_point.c @@ -41,6 +41,9 @@ struct widepoint_stage { float point_size_min; float point_size_max; + float xbias; + float ybias; + uint texcoord_slot[PIPE_MAX_SHADER_OUTPUTS]; uint texcoord_mode[PIPE_MAX_SHADER_OUTPUTS]; uint num_texcoords; @@ -126,8 +129,6 @@ static void widepoint_point( struct draw_stage *stage, float *pos2 = v2->data[0]; float *pos3 = v3->data[0]; - const float xbias = 0.0, ybias = -0.125; - /* point size is either per-vertex or fixed size */ if (wide->psize_slot >= 0) { half_size = header->v[0]->data[wide->psize_slot][0]; @@ -144,10 +145,10 @@ static void widepoint_point( struct draw_stage *stage, half_size = wide->half_point_size; } - left_adj = -half_size + xbias; - right_adj = half_size + xbias; - bot_adj = half_size + ybias; - top_adj = -half_size + ybias; + left_adj = -half_size + wide->xbias; + right_adj = half_size + wide->xbias; + bot_adj = half_size + wide->ybias; + top_adj = -half_size + wide->ybias; pos0[0] += left_adj; pos0[1] += top_adj; @@ -194,6 +195,12 @@ static void widepoint_first_point( struct draw_stage *stage, wide->half_point_size = 0.5f * draw->rasterizer->point_size; wide->point_size_min = draw->rasterizer->point_size_min; wide->point_size_max = draw->rasterizer->point_size_max; + wide->xbias = 0.0; + wide->ybias = 0.0; + + if (draw->rasterizer->gl_rasterization_rules) { + wide->ybias = -0.125; + } /* XXX we won't know the real size if it's computed by the vertex shader! */ if ((draw->rasterizer->point_size > draw->wide_point_threshold) || -- cgit v1.2.3