mesa: add glInternalBufferSubDataCopyMESA for glthread

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4314>

src/mapi/glapi/gen/gl_API.xml

@@ -13286,6 +13286,19 @@
     </function>
 </category>
 
+<category name="GL_MESA_internal_functions">
+    <!-- Internal function for glthread to implement BufferSubData as a GPU copy. -->
+    <function name="InternalBufferSubDataCopyMESA" es2="2.0">
+        <param name="srcBuffer" type="GLintptr"/> <!-- "struct gl_buffer_object *" really -->
+        <param name="srcOffset" type="GLuint"/>
+        <param name="dstTargetOrName" type="GLuint"/>
+        <param name="dstOffset" type="GLintptr"/>
+        <param name="size" type="GLsizeiptr"/>
+        <param name="named" type="GLboolean"/>
+        <param name="ext_dsa" type="GLboolean"/>
+    </function>
+</category>
+
 <xi:include href="OES_EGL_image.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 <xi:include href="EXT_EGL_image_storage.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
 

src/mapi/glapi/gen/gl_marshal.py

@@ -32,6 +32,7 @@ import sys
 header = """
 #include "api_exec.h"
 #include "glthread_marshal.h"
+#include "bufferobj.h"
 #include "dispatch.h"
 
 #define COMPAT (ctx->API != API_OPENGL_CORE)

src/mapi/glapi/gen/static_data.py

@@ -1643,6 +1643,7 @@ offsets = {
     "CopyImageSubDataNV": 1607,
     "ViewportSwizzleNV": 1608,
     "AlphaToCoverageDitherControlNV": 1609,
+    "InternalBufferSubDataCopyMESA": 1610,
 }
 
 functions = [