From 3e625ce18e35b2b0343962f93480abf4bf9b188a Mon Sep 17 00:00:00 2001
From: Brian <brian.paul@tungstengraphics.com>
Date: Thu, 13 Mar 2008 15:07:14 -0600
Subject: gallium: add some temporary code for testing draw module vertex
 passthrough

Set TEST_DRAW_PASSTHROUGH=1, run progs/trivial/clear-scissor
---
 src/mesa/state_tracker/st_cb_clear.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'src/mesa/state_tracker/st_cb_clear.c')

diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index cc8a136292d..4fe6195a070 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -52,7 +52,8 @@
 #include "cso_cache/cso_context.h"
 
 
-
+/* XXX for testing draw module vertex passthrough: */
+#define TEST_DRAW_PASSTHROUGH 0
 
 
 static GLuint
@@ -229,6 +230,12 @@ draw_quad(GLcontext *ctx,
    GLfloat verts[4][2][4]; /* four verts, two attribs, XYZW */
    GLuint i;
 
+#if TEST_DRAW_PASSTHROUGH
+   /* invert Y coords (may be off by one pixel) */
+   y0 = ctx->DrawBuffer->Height - y0;
+   y1 = ctx->DrawBuffer->Height - y1;
+#endif
+
    /* positions */
    verts[0][0][0] = x0;
    verts[0][0][1] = y0;
@@ -335,6 +342,10 @@ clear_with_quad(GLcontext *ctx,
        */
       if (ctx->Scissor.Enabled)
          raster.scissor = 1;
+#endif
+#if TEST_DRAW_PASSTHROUGH
+      raster.bypass_clipping = 1;
+      raster.bypass_vs = 1;
 #endif
       cso_set_rasterizer(st->cso_context, &raster);
    }
@@ -348,6 +359,7 @@ clear_with_quad(GLcontext *ctx,
       pipe->bind_fs_state(pipe, stfp->driver_shader);
    }
 
+#if !TEST_DRAW_PASSTHROUGH
    /* vertex shader state: color/position pass-through */
    {
       static struct st_vertex_program *stvp = NULL;
@@ -356,7 +368,9 @@ clear_with_quad(GLcontext *ctx,
       }
       pipe->bind_vs_state(pipe, stvp->driver_shader);
    }
+#endif
 
+#if !TEST_DRAW_PASSTHROUGH
    /* viewport state: viewport matching window dims */
    {
       const float width = ctx->DrawBuffer->Width;
@@ -372,6 +386,7 @@ clear_with_quad(GLcontext *ctx,
       vp.translate[3] = 0.0;
       pipe->set_viewport_state(pipe, &vp);
    }
+#endif
 
    /* draw quad matching scissor rect (XXX verify coord round-off) */
    draw_quad(ctx, x0, y0, x1, y1, ctx->Depth.Clear, ctx->Color.ClearColor);
-- 
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