From 99effaa9658a34eb07255bb1964569c8a86e8dda Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 16 Oct 2015 16:14:46 -0600 Subject: [PATCH] svga: try to avoid index generation for some primitive types MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The svga device doesn't directly support quads, quad strips or polygons so we have to convert those types to indexed triangle lists. But we can sometimes avoid that if we're drawing flat/constant-colored prims and we don't have to worry about provoking vertex. Reviewed-by: Charmaine Lee Reviewed-by: José Fonseca --- src/gallium/drivers/svga/svga_draw_arrays.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/src/gallium/drivers/svga/svga_draw_arrays.c b/src/gallium/drivers/svga/svga_draw_arrays.c index e4d776443c5..caf4b17de16 100644 --- a/src/gallium/drivers/svga/svga_draw_arrays.c +++ b/src/gallium/drivers/svga/svga_draw_arrays.c @@ -218,6 +218,20 @@ svga_hwtnl_draw_arrays(struct svga_hwtnl *hwtnl, * the hardware wants. */ api_pv = hwtnl->hw_pv; + + if (hwtnl->api_fillmode == PIPE_POLYGON_MODE_FILL) { + /* Do some simple primitive conversions to avoid index buffer + * generation below. Note that polygons and quads are not directly + * supported by the svga device. Also note, we can only do this + * for flat/constant-colored rendering because of provoking vertex. + */ + if (prim == PIPE_PRIM_POLYGON) { + prim = PIPE_PRIM_TRIANGLE_FAN; + } + else if (prim == PIPE_PRIM_QUADS && count == 4) { + prim = PIPE_PRIM_TRIANGLE_FAN; + } + } } if (hwtnl->api_fillmode != PIPE_POLYGON_MODE_FILL && -- 2.30.2