From 0238976665e15f083dd01a5adada80a45df18c5f Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Wed, 19 Jul 2017 11:14:48 +0200
Subject: mesa: add KHR_no_error support to glDrawBuffer()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
---
 src/mapi/glapi/gen/gl_API.xml |  2 +-
 src/mesa/main/buffers.c       | 16 ++++++++++++++++
 src/mesa/main/buffers.h       |  3 +++
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 95c448d2364..4d0211a33c7 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -2286,7 +2286,7 @@
         <glx rop="125"/>
     </function>
 
-    <function name="DrawBuffer">
+    <function name="DrawBuffer" no_error="true">
         <param name="mode" type="GLenum"/>
         <glx rop="126"/>
     </function>
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index a37b39cf525..02596b7f689 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -319,6 +319,22 @@ draw_buffer_error(struct gl_context *ctx, struct gl_framebuffer *fb,
 }
 
 
+static void
+draw_buffer_no_error(struct gl_context *ctx, struct gl_framebuffer *fb,
+                     GLenum buffer, const char *caller)
+{
+   draw_buffer(ctx, fb, buffer, caller, true);
+}
+
+
+void GLAPIENTRY
+_mesa_DrawBuffer_no_error(GLenum buffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   draw_buffer_no_error(ctx, ctx->DrawBuffer, buffer, "glDrawBuffer");
+}
+
+
 void GLAPIENTRY
 _mesa_DrawBuffer(GLenum buffer)
 {
diff --git a/src/mesa/main/buffers.h b/src/mesa/main/buffers.h
index ba06138017e..630b0dce546 100644
--- a/src/mesa/main/buffers.h
+++ b/src/mesa/main/buffers.h
@@ -40,6 +40,9 @@ struct gl_context;
 struct gl_framebuffer;
 
 
+void GLAPIENTRY
+_mesa_DrawBuffer_no_error(GLenum mode);
+
 extern void GLAPIENTRY
 _mesa_DrawBuffer( GLenum mode );
 
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