src/gallium/auxiliary/util/u_tile.h

/**************************************************************************
 * 
 * Copyright 2007 VMware, Inc.
 * All Rights Reserved.
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 * permit persons to whom the Software is furnished to do so, subject to
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 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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#ifndef P_TILE_H
#define P_TILE_H

#include "pipe/p_compiler.h"
#include "pipe/p_format.h"
#include "pipe/p_state.h"

struct pipe_context;
struct pipe_transfer;

/**
 * Clip tile against transfer dims.
 *
 * XXX: this only clips width and height!
 *
 * \return TRUE if tile is totally clipped, FALSE otherwise
 */
static inline boolean
u_clip_tile(uint x, uint y, uint *w, uint *h, const struct pipe_box *box)
{
   if ((int) x >= box->width)
      return TRUE;
   if ((int) y >= box->height)
      return TRUE;
   if ((int) (x + *w) > box->width)
      *w = box->width - x;
   if ((int) (y + *h) > box->height)
      *h = box->height - y;
   return FALSE;
}

#ifdef __cplusplus
extern "C" {
#endif

void
pipe_get_tile_raw(struct pipe_transfer *pt,
                  const void *src,
                  uint x, uint y, uint w, uint h,
                  void *p, int dst_stride);

void
pipe_put_tile_raw(struct pipe_transfer *pt,
                  void *dst,
                  uint x, uint y, uint w, uint h,
                  const void *p, int src_stride);


void
pipe_get_tile_rgba(struct pipe_transfer *pt,
                   const void *src,
                   uint x, uint y, uint w, uint h,
                   enum pipe_format format,
                   void *dst);

void
pipe_put_tile_rgba(struct pipe_transfer *pt,
                   void *dst,
                   uint x, uint y, uint w, uint h,
                   enum pipe_format format,
                   const void *src);

#ifdef __cplusplus
}
#endif

#endif