mesa: add support for glUnmapNamedBufferEXT()

Since the ARB DSA function glUnmapNamedBuffer() is only exposed
for 3.1 or above we make glUnmapNamedBuffer() an alias of
glUnmapNamedBufferEXT() rather than the other way around.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>

src/mapi/glapi/gen/ARB_direct_state_access.xml

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

src/mapi/glapi/gen/EXT_direct_state_access.xml

@@ -174,6 +174,11 @@
       <param name="data" type="const GLvoid *" />
    </function>
 
+   <function name="UnmapNamedBufferEXT">
+      <return type="GLboolean" />
+      <param name="buffer" type="GLuint" />
+   </function>
+
    <!-- OpenGL 3.0 -->
 
    <function name="MapNamedBufferRangeEXT">

src/mapi/glapi/gen/static_data.py

@@ -1053,7 +1053,7 @@ offsets = {
     "TextureSubImage3D": 1017,
     "TransformFeedbackBufferBase": 1018,
     "TransformFeedbackBufferRange": 1019,
-    "UnmapNamedBuffer": 1020,
+    "UnmapNamedBufferEXT": 1020,
     "VertexArrayAttribBinding": 1021,
     "VertexArrayAttribFormat": 1022,
     "VertexArrayAttribIFormat": 1023,

src/mesa/main/bufferobj.c

@@ -2688,7 +2688,7 @@ _mesa_UnmapBuffer(GLenum target)
 }
 
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer_no_error(GLuint buffer)
+_mesa_UnmapNamedBufferEXT_no_error(GLuint buffer)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj = _mesa_lookup_bufferobj(ctx, buffer);
@@ -2697,7 +2697,7 @@ _mesa_UnmapNamedBuffer_no_error(GLuint buffer)
 }
 
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer(GLuint buffer)
+_mesa_UnmapNamedBufferEXT(GLuint buffer)
 {
    GET_CURRENT_CONTEXT(ctx);
    struct gl_buffer_object *bufObj;

src/mesa/main/bufferobj.h

@@ -303,9 +303,9 @@ GLboolean GLAPIENTRY
 _mesa_UnmapBuffer(GLenum target);
 
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer_no_error(GLuint buffer);
+_mesa_UnmapNamedBufferEXT_no_error(GLuint buffer);
 GLboolean GLAPIENTRY
-_mesa_UnmapNamedBuffer(GLuint buffer);
+_mesa_UnmapNamedBufferEXT(GLuint buffer);
 
 void GLAPIENTRY
 _mesa_GetBufferParameteriv(GLenum target, GLenum pname, GLint *params);

src/mesa/main/tests/dispatch_sanity.cpp

@@ -932,7 +932,6 @@ const struct function common_desktop_functions_possible[] = {
    { "glClearNamedBufferSubData", 45, -1 },
    { "glMapNamedBuffer", 45, -1 },
    { "glMapNamedBufferRange", 45, -1 },
-   { "glUnmapNamedBuffer", 45, -1 },
    { "glFlushMappedNamedBufferRange", 45, -1 },
    { "glGetNamedBufferParameteriv", 45, -1 },
    { "glGetNamedBufferParameteri64v", 45, -1 },
@@ -1129,7 +1128,7 @@ const struct function common_desktop_functions_possible[] = {
    { "glNamedBufferDataEXT", 15, -1 },
    { "glNamedBufferSubDataEXT", 15, -1 },
    //{ "glMapNamedBufferEXT", 15, -1 },
-   //{ "glUnmapNamedBufferEXT", 15, -1 },
+   { "glUnmapNamedBufferEXT", 15, -1 },
    //{ "glGetNamedBufferParameterivEXT", 15, -1 },
    //{ "glGetNamedBufferPointervEXT", 15, -1 },
    //{ "glGetNamedBufferSubDataEXT", 15, -1 },