llvmpipe: native rasterization for lines

Rasterize lines directly by treating them as 4-sided polygons.
Still need to check the exact pixel rasteration.

1 files changed, 38 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_context.h b/src/gallium/drivers/llvmpipe/lp_setup_context.h
index 1a147e0353..a4838d59a5 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_context.h
+++ b/src/gallium/drivers/llvmpipe/lp_setup_context.h
@@ -91,6 +91,7 @@ struct lp_setup_context
    boolean scissor_test;
    unsigned cullmode;
    float pixel_offset;
+   float line_width;
 
    struct pipe_framebuffer_state fb;
    struct u_rect framebuffer;
@@ -170,5 +171,42 @@ lp_setup_print_vertex(struct lp_setup_context *setup,
                       const char *name,
                       const float (*v)[4]);
 
+/** shared code between lp_setup_line and lp_setup_tri */
+extern lp_rast_cmd lp_rast_tri_tab[]; 
+
+void
+do_triangle_ccw_whole_tile(struct lp_setup_context *setup,
+                           struct lp_scene *scene,
+                           struct lp_rast_triangle *tri,
+                           int x, int y,
+                           boolean opaque,
+                           int *is_blit);
+
+
+void 
+lp_setup_tri_coefficients( struct lp_setup_context *setup,
+                           struct lp_rast_triangle *tri,
+                           float oneoverarea,
+                           const float (*v1)[4],
+                           const float (*v2)[4],
+                           const float (*v3)[4],
+                           boolean frontface);
+
+struct lp_rast_triangle *
+lp_setup_alloc_triangle(struct lp_scene *scene,
+                        unsigned nr_inputs,
+                        unsigned nr_planes,
+                        unsigned *tri_size);
+
+void
+lp_setup_fragcoord_coef(struct lp_setup_context *setup,
+                         struct lp_rast_triangle *tri,
+                         float oneoverarea,
+                         unsigned slot,
+                         const float (*v1)[4],
+                         const float (*v2)[4],
+                         const float (*v3)[4],
+                         unsigned usage_mask);
+
 #endif