minor update

driver/tests/tex_demo/utils.h

@@ -1,6 +1,7 @@
 #include <cstdint>
 #include <vector>
 #include <iostream>
+#include "blitter.h"
 
 int LoadTGA(const char *filename, 
             std::vector<uint8_t> &pixels, 
@@ -14,4 +15,13 @@ int SaveTGA(const char *filename,
             uint32_t height, 
             uint32_t bpp);
 
+int CopyBuffers(const GLSurfaceDesc &dstDesc, 
+                int32_t dstOffsetX,
+                int32_t dstOffsetY, 
+                int32_t copyWidth, 
+                int32_t copyHeight,
+                const GLSurfaceDesc &srcDesc, 
+                int32_t srcOffsetX,
+                int32_t srcOffsetY);
+
 void dump_image(const std::vector<uint8_t>& pixels, uint32_t width, uint32_t height, uint32_t bpp);