GLenum format, GLenum type, GLvoid *pixels,
struct gl_texture_image *texImage );
+ /**
+ * Called by glClearTex[Sub]Image
+ *
+ * Clears a rectangular region of the image to a given value. The
+ * clearValue argument is either NULL or points to a single texel to use as
+ * the clear value in the same internal format as the texture image. If it
+ * is NULL then the texture should be cleared to zeroes.
+ */
+ void (*ClearTexSubImage)(struct gl_context *ctx,
+ struct gl_texture_image *texImage,
+ GLint xoffset, GLint yoffset, GLint zoffset,
+ GLsizei width, GLsizei height, GLsizei depth,
+ const GLvoid *clearValue);
+
/**
* Called by glCopyTex[Sub]Image[123]D().
*