From: Eric Anholt <eric@anholt.net>
Date: Wed, 6 Aug 2014 18:52:57 +0000 (-0700)
Subject: vc4: Add some debug code for forcing fragment shader output color.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=9492eb588dd001ec4578aa2ba3c258b43b76263b;p=mesa.git

vc4: Add some debug code for forcing fragment shader output color.
---

diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index 0c821c8960d..4e991148c40 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -562,6 +562,21 @@ emit_frag_end(struct tgsi_to_qir *trans)
         const struct util_format_description *format_desc =
                 util_format_description(trans->fs_key->color_format);
 
+        /* Debug: Sometimes you're getting a black output and just want to see
+         * if the FS is getting executed at all.  Spam magenta into the color
+         * output.
+         */
+        if (0) {
+                trans->outputs[format_desc->swizzle[0]] =
+                        qir_uniform_ui(trans, fui(1.0));
+                trans->outputs[format_desc->swizzle[1]] =
+                        qir_uniform_ui(trans, fui(0.0));
+                trans->outputs[format_desc->swizzle[2]] =
+                        qir_uniform_ui(trans, fui(1.0));
+                trans->outputs[format_desc->swizzle[3]] =
+                        qir_uniform_ui(trans, fui(0.5));
+        }
+
         struct qreg swizzled_outputs[4] = {
                 trans->outputs[format_desc->swizzle[0]],
                 trans->outputs[format_desc->swizzle[1]],