Add functions to check if texture data initialization is required.

Change-Id: I54c3b90780c304d6001b9e52278672981c96cb83
Reviewed-on: https://chromium-review.googlesource.com/176853
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Commit-Queue: Shannon Woods <shannonwoods@chromium.org>
Tested-by: Shannon Woods <shannonwoods@chromium.org>
diff --git a/src/libGLESv2/formatutils.h b/src/libGLESv2/formatutils.h
index 0c0731b..7dea22c 100644
--- a/src/libGLESv2/formatutils.h
+++ b/src/libGLESv2/formatutils.h
@@ -24,6 +24,9 @@
                                   const void *input, unsigned int inputRowPitch, unsigned int inputDepthPitch,
                                   void *output, unsigned int outputRowPitch, unsigned int outputDepthPitch);
 
+typedef void (*InitializeTextureDataFunction)(int width, int height, int depth,
+                                              void *output, unsigned int outputRowPitch, unsigned int outputDepthPitch);
+
 typedef void (*ColorReadFunction)(const void *source, void *dest);
 typedef void (*ColorWriteFunction)(const void *source, void *dest);
 typedef void (*ColorCopyFunction)(const void *source, void *dest);