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authorBrian <[email protected]>2008-02-21 16:56:32 -0700
committerBrian <[email protected]>2008-02-21 16:56:32 -0700
commit446bfc32a83008e0865ec869bc80b920c907f10f (patch)
tree8d19dd335aa2bdbc5dcd51dd91d6f143bad8a662 /src/gallium/drivers/softpipe
parenteb4dc2dd5ed62e6ccb55ccc2bc13f6a2f3fc1f76 (diff)
gallium: new draw stage for polygon stipple.
For hardware without native polygon stipple. Create a 32x32 alpha texture that encodes the stipple pattern. Modify the user's fragment program to sample the texture (with gl_FragCoord) and kill the fragment according to the texel value. Temporarily enabled in softpipe driver, replacing the sp_quad_stipple.c step.
Diffstat (limited to 'src/gallium/drivers/softpipe')
-rw-r--r--src/gallium/drivers/softpipe/sp_context.c5
-rw-r--r--src/gallium/drivers/softpipe/sp_context.h7
-rw-r--r--src/gallium/drivers/softpipe/sp_quad.c2
3 files changed, 14 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_context.c b/src/gallium/drivers/softpipe/sp_context.c
index de4c6c18e7f..2cdf3c75bf3 100644
--- a/src/gallium/drivers/softpipe/sp_context.c
+++ b/src/gallium/drivers/softpipe/sp_context.c
@@ -332,6 +332,11 @@ struct pipe_context *softpipe_create( struct pipe_winsys *pipe_winsys,
draw_install_aaline_stage(softpipe->draw, &softpipe->pipe);
draw_install_aapoint_stage(softpipe->draw, &softpipe->pipe);
+#if USE_DRAW_STAGE_PSTIPPLE
+ /* Do polygon stipple w/ texture map + frag prog? */
+ draw_install_pstipple_stage(softpipe->draw, &softpipe->pipe);
+#endif
+
/* sp_prim_setup can do wide points (don't convert to quads) */
draw_convert_wide_points(softpipe->draw, FALSE);
diff --git a/src/gallium/drivers/softpipe/sp_context.h b/src/gallium/drivers/softpipe/sp_context.h
index a50cee76486..feeafc70846 100644
--- a/src/gallium/drivers/softpipe/sp_context.h
+++ b/src/gallium/drivers/softpipe/sp_context.h
@@ -39,6 +39,13 @@
#include "sp_quad.h"
+/**
+ * This is a temporary variable for testing draw-stage polygon stipple.
+ * If zero, do stipple in sp_quad_stipple.c
+ */
+#define USE_DRAW_STAGE_PSTIPPLE 1
+
+
struct softpipe_winsys;
struct softpipe_vbuf_render;
struct draw_context;
diff --git a/src/gallium/drivers/softpipe/sp_quad.c b/src/gallium/drivers/softpipe/sp_quad.c
index 6bd468a51cf..15b5594547d 100644
--- a/src/gallium/drivers/softpipe/sp_quad.c
+++ b/src/gallium/drivers/softpipe/sp_quad.c
@@ -112,7 +112,9 @@ sp_build_quad_pipeline(struct softpipe_context *sp)
sp_push_quad_first( sp, sp->quad.earlyz );
}
+#if !USE_DRAW_STAGE_PSTIPPLE
if (sp->rasterizer->poly_stipple_enable) {
sp_push_quad_first( sp, sp->quad.polygon_stipple );
}
+#endif
}