From aceeb80d4f706980aaf71b8e098d4c6718d8ac90 Mon Sep 17 00:00:00 2001 From: Brian Date: Mon, 18 Feb 2008 16:19:05 -0700 Subject: gallium: antialiased line drawing New draw/prim stage: draw_aaline. When installed, lines are replaced by textured quads to do antialiasing. The current user-defined fragment shader is modified to do a texture fetch and modulate fragment alpha. --- src/gallium/auxiliary/draw/draw_context.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'src/gallium/auxiliary/draw/draw_context.c') diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c index 4be38303169..a7f3b4aecb2 100644 --- a/src/gallium/auxiliary/draw/draw_context.c +++ b/src/gallium/auxiliary/draw/draw_context.c @@ -103,6 +103,8 @@ void draw_destroy( struct draw_context *draw ) draw->pipeline.flatshade->destroy( draw->pipeline.flatshade ); draw->pipeline.cull->destroy( draw->pipeline.cull ); draw->pipeline.validate->destroy( draw->pipeline.validate ); + if (draw->pipeline.aaline) + draw->pipeline.aaline->destroy( draw->pipeline.aaline ); if (draw->pipeline.rasterize) draw->pipeline.rasterize->destroy( draw->pipeline.rasterize ); tgsi_exec_machine_free_data(&draw->machine); @@ -239,6 +241,26 @@ draw_convert_wide_lines(struct draw_context *draw, boolean enable) } +/** + * The draw module may sometimes generate vertices with extra attributes + * (such as texcoords for AA lines). The driver can call this function + * to find those attributes. + */ +int +draw_find_vs_output(struct draw_context *draw, + uint semantic_name, uint semantic_index) +{ + /* XXX there may be more than one extra vertex attrib. + * For example, simulated gl_FragCoord and gl_PointCoord. + */ + if (draw->extra_vp_outputs.semantic_name == semantic_name && + draw->extra_vp_outputs.semantic_index == semantic_index) { + return draw->extra_vp_outputs.slot; + } + return 0; +} + + /** * Allocate space for temporary post-transform vertices, such as for clipping. */ -- cgit v1.2.3