From 352adb53db342a5b9042680a5e81ffbca1b2a417 Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Mon, 26 Jun 2017 17:12:18 +0200
Subject: [PATCH] mesa: add KHR_no_error support for gl*ReadBuffer()

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
---
 .../glapi/gen/ARB_direct_state_access.xml     |  2 +-
 src/mapi/glapi/gen/gl_API.xml                 |  2 +-
 src/mesa/main/buffers.c                       | 33 +++++++++++++++++++
 src/mesa/main/buffers.h                       |  5 +++
 4 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/src/mapi/glapi/gen/ARB_direct_state_access.xml b/src/mapi/glapi/gen/ARB_direct_state_access.xml
index 6226aa0b9d2..d848f78d62d 100644
--- a/src/mapi/glapi/gen/ARB_direct_state_access.xml
+++ b/src/mapi/glapi/gen/ARB_direct_state_access.xml
@@ -197,7 +197,7 @@
       <param name="bufs" type="const GLenum *" />
    </function>
 
-   <function name="NamedFramebufferReadBuffer">
+   <function name="NamedFramebufferReadBuffer" no_error="true">
       <param name="framebuffer" type="GLuint" />
       <param name="buf" type="GLenum" />
    </function>
diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml
index 4833d520103..d2810952501 100644
--- a/src/mapi/glapi/gen/gl_API.xml
+++ b/src/mapi/glapi/gen/gl_API.xml
@@ -2626,7 +2626,7 @@
         <glx rop="170" large="true"/>
     </function>
 
-    <function name="ReadBuffer" es2="3.0">
+    <function name="ReadBuffer" es2="3.0" no_error="true">
         <param name="mode" type="GLenum"/>
         <glx rop="171"/>
     </function>
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index 18e46adf84e..6359e1b51fd 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -801,6 +801,22 @@ read_buffer_err(struct gl_context *ctx, struct gl_framebuffer *fb,
 }
 
 
+static void
+read_buffer_no_error(struct gl_context *ctx, struct gl_framebuffer *fb,
+                     GLenum buffer, const char *caller)
+{
+   read_buffer(ctx, fb, buffer, caller, true);
+}
+
+
+void GLAPIENTRY
+_mesa_ReadBuffer_no_error(GLenum buffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   read_buffer_no_error(ctx, ctx->ReadBuffer, buffer, "glReadBuffer");
+}
+
+
 void GLAPIENTRY
 _mesa_ReadBuffer(GLenum buffer)
 {
@@ -809,6 +825,23 @@ _mesa_ReadBuffer(GLenum buffer)
 }
 
 
+void GLAPIENTRY
+_mesa_NamedFramebufferReadBuffer_no_error(GLuint framebuffer, GLenum src)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   struct gl_framebuffer *fb;
+
+   if (framebuffer) {
+      fb = _mesa_lookup_framebuffer(ctx, framebuffer);
+   } else {
+      fb = ctx->WinSysReadBuffer;
+   }
+
+   read_buffer_no_error(ctx, fb, src, "glNamedFramebufferReadBuffer");
+}
+
+
 void GLAPIENTRY
 _mesa_NamedFramebufferReadBuffer(GLuint framebuffer, GLenum src)
 {
diff --git a/src/mesa/main/buffers.h b/src/mesa/main/buffers.h
index 9df08154688..ba06138017e 100644
--- a/src/mesa/main/buffers.h
+++ b/src/mesa/main/buffers.h
@@ -65,10 +65,15 @@ _mesa_readbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
 extern void
 _mesa_update_draw_buffers(struct gl_context *ctx);
 
+void GLAPIENTRY
+_mesa_ReadBuffer_no_error(GLenum mode);
 
 extern void GLAPIENTRY
 _mesa_ReadBuffer( GLenum mode );
 
+void GLAPIENTRY
+_mesa_NamedFramebufferReadBuffer_no_error(GLuint framebuffer, GLenum src);
+
 extern void GLAPIENTRY
 _mesa_NamedFramebufferReadBuffer(GLuint framebuffer, GLenum src);
 
-- 
2.30.2