mesa: add KHR_no_error support for unmap buffer functions

Reviewed-by: Eric Anholt <eric@anholt.net>

src/mapi/glapi/gen/ARB_direct_state_access.xml

@@ -115,7 +115,7 @@
       <param name="access" type="GLbitfield" />
    </function>
 
-   <function name="UnmapNamedBuffer">
+   <function name="UnmapNamedBuffer" no_error="true">
       <return type="GLboolean" />
       <param name="buffer" type="GLuint" />
    </function>

src/mapi/glapi/gen/gl_API.xml

@@ -5104,7 +5104,7 @@
         <glx ignore="true"/>
     </function>
 
-    <function name="UnmapBuffer" es2="3.0">
+    <function name="UnmapBuffer" es2="3.0" no_error="true">
         <param name="target" type="GLenum"/>
         <return type="GLboolean"/>
         <glx ignore="true"/>

src/mesa/main/bufferobj.c

@@ -2066,6 +2066,16 @@ validate_and_unmap_buffer(struct gl_context *ctx,
    return unmap_buffer(ctx, bufObj);
 }
 
+GLboolean GLAPIENTRY
+_mesa_UnmapBuffer_no_error(GLenum target)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object **bufObjPtr = get_buffer_target(ctx, target);
+   struct gl_buffer_object *bufObj = *bufObjPtr;
+
+   return unmap_buffer(ctx, bufObj);
+}
+
 GLboolean GLAPIENTRY
 _mesa_UnmapBuffer(GLenum target)
 {
@@ -2079,6 +2089,15 @@ _mesa_UnmapBuffer(GLenum target)
    return validate_and_unmap_buffer(ctx, bufObj, "glUnmapBuffer");
 }
 
+GLboolean GLAPIENTRY
+_mesa_UnmapNamedBuffer_no_error(GLuint buffer)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+
+   return unmap_buffer(ctx, bufObj);
+}
+
 GLboolean GLAPIENTRY
 _mesa_UnmapNamedBuffer(GLuint buffer)
 {

src/mesa/main/bufferobj.h

@@ -252,9 +252,13 @@ _mesa_ClearNamedBufferSubData(GLuint buffer, GLenum internalformat,
                               GLenum format, GLenum type,
                               const GLvoid *data);
 
+GLboolean GLAPIENTRY
+_mesa_UnmapBuffer_no_error(GLenum target);
 GLboolean GLAPIENTRY
 _mesa_UnmapBuffer(GLenum target);
 
+GLboolean GLAPIENTRY
+_mesa_UnmapNamedBuffer_no_error(GLuint buffer);
 GLboolean GLAPIENTRY
 _mesa_UnmapNamedBuffer(GLuint buffer);