
#ifndef U_TRANSFER_H
#define U_TRANSFER_H

/* Fallback implementations for inline read/writes which just go back
 * to the regular transfer behaviour.
 */
#include "pipe/p_state.h"

struct pipe_context;
struct winsys_handle;

boolean u_default_resource_get_handle(struct pipe_screen *screen,
				      struct pipe_resource *resource,
				      struct winsys_handle *handle);

void u_default_transfer_inline_write( struct pipe_context *pipe,
			      struct pipe_resource *resource,
			      struct pipe_subresource sr,
			      unsigned usage,
			      const struct pipe_box *box,
			      const void *data,
			      unsigned stride,
			      unsigned slice_stride);

void u_default_transfer_flush_region( struct pipe_context *pipe,
				      struct pipe_transfer *transfer,
				      const struct pipe_box *box);

unsigned u_default_is_resource_referenced( struct pipe_context *pipe,
					   struct pipe_resource *resource,
					   unsigned face, unsigned level);

struct pipe_transfer * u_default_get_transfer(struct pipe_context *context,
					      struct pipe_resource *resource,
					      struct pipe_subresource sr,
					      unsigned usage,
					      const struct pipe_box *box);

void u_default_transfer_unmap( struct pipe_context *pipe,
			       struct pipe_transfer *transfer );

void u_default_transfer_destroy(struct pipe_context *pipe,
				struct pipe_transfer *transfer);



/* Useful helper to allow >1 implementation of resource functionality
 * to exist in a single driver.  This is intended to be transitionary!
 */
struct u_resource_vtbl {

   boolean (*resource_get_handle)(struct pipe_screen *,
				  struct pipe_resource *tex,
				  struct winsys_handle *handle);

   void (*resource_destroy)(struct pipe_screen *,
			    struct pipe_resource *pt);

   unsigned (*is_resource_referenced)(struct pipe_context *pipe,
				      struct pipe_resource *texture,
				      unsigned face, unsigned level);

   struct pipe_transfer *(*get_transfer)(struct pipe_context *,
					 struct pipe_resource *resource,
					 struct pipe_subresource,
					 unsigned usage,
					 const struct pipe_box *);

   void (*transfer_destroy)(struct pipe_context *,
			    struct pipe_transfer *);

   void *(*transfer_map)( struct pipe_context *,
			  struct pipe_transfer *transfer );

   void (*transfer_flush_region)( struct pipe_context *,
				  struct pipe_transfer *transfer,
				  const struct pipe_box *);

   void (*transfer_unmap)( struct pipe_context *,
			   struct pipe_transfer *transfer );

   void (*transfer_inline_write)( struct pipe_context *pipe,
				  struct pipe_resource *resource,
				  struct pipe_subresource sr,
				  unsigned usage,
				  const struct pipe_box *box,
				  const void *data,
				  unsigned stride,
				  unsigned slice_stride);
};


struct u_resource {
   struct pipe_resource b;
   struct u_resource_vtbl *vtbl;
};


boolean u_resource_get_handle_vtbl(struct pipe_screen *screen,
			      struct pipe_resource *resource,
			      struct winsys_handle *handle);

void u_resource_destroy_vtbl(struct pipe_screen *screen,
			struct pipe_resource *resource);

unsigned u_is_resource_referenced_vtbl( struct pipe_context *pipe,
					struct pipe_resource *resource,
					unsigned face, unsigned level);

struct pipe_transfer *u_get_transfer_vtbl(struct pipe_context *context,
				     struct pipe_resource *resource,
				     struct pipe_subresource sr,
				     unsigned usage,
				     const struct pipe_box *box);

void u_transfer_destroy_vtbl(struct pipe_context *pipe,
			struct pipe_transfer *transfer);

void *u_transfer_map_vtbl( struct pipe_context *pipe,
		      struct pipe_transfer *transfer );

void u_transfer_flush_region_vtbl( struct pipe_context *pipe,
			      struct pipe_transfer *transfer,
			      const struct pipe_box *box);

void u_transfer_unmap_vtbl( struct pipe_context *rm_ctx,
		       struct pipe_transfer *transfer );

void u_transfer_inline_write_vtbl( struct pipe_context *rm_ctx,
				   struct pipe_resource *resource,
				   struct pipe_subresource sr,
				   unsigned usage,
				   const struct pipe_box *box,
				   const void *data,
				   unsigned stride,
				   unsigned slice_stride);








#endif
