src/mesa/pipe/p_inlines.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef P_INLINES_H
  29 #define P_INLINES_H
  30
  31 #include "p_context.h"
  32 #include "p_defines.h"
  33 #include "p_winsys.h"
  34
  35
  36 static INLINE ubyte *
  37 pipe_surface_map(struct pipe_surface *surface)
  38 {
  39    if (!surface->map_refcount++) {
  40       surface->map
  41          = (ubyte *) surface->winsys->buffer_map( surface->winsys,
  42                                                   surface->buffer,
  43                                                   PIPE_BUFFER_FLAG_WRITE |
  44                                                   PIPE_BUFFER_FLAG_READ )
  45            + surface->offset;
  46    }
  47
  48    return surface->map;
  49 }
  50
  51 static INLINE void
  52 pipe_surface_unmap(struct pipe_surface *surface)
  53 {
  54    if (surface->map_refcount > 0) {
  55       assert(surface->map);
  56       if (!--surface->map_refcount) {
  57          surface->winsys->buffer_unmap( surface->winsys,
  58                                         surface->buffer );
  59          surface->map = NULL;
  60       }
  61    }
  62 }
  63
  64
  65 /**
  66  * Set 'ptr' to point to 'surf' and update reference counting.
  67  * The old thing pointed to, if any, will be unreferenced first.
  68  * 'surf' may be NULL.
  69  */
  70 static INLINE void
  71 pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
  72 {
  73    assert(ptr);
  74    if (*ptr) {
  75       struct pipe_winsys *winsys = (*ptr)->winsys;
  76       winsys->surface_release(winsys, ptr);
  77       assert(!*ptr);
  78    }
  79    if (surf) {
  80       /* reference the new thing */
  81       surf->refcount++;
  82       *ptr = surf;
  83    }
  84 }
  85
  86
  87 /**
  88  * \sa pipe_surface_reference
  89  */
  90 static INLINE void
  91 pipe_texture_reference(struct pipe_context *pipe, struct pipe_texture **ptr,
  92                        struct pipe_texture *pt)
  93 {
  94    assert(ptr);
  95    if (*ptr) {
  96       pipe->texture_release(pipe, ptr);
  97       assert(!*ptr);
  98    }
  99    if (pt) {
 100       /* reference the new thing */
 101       pt->refcount++;
 102       *ptr = pt;
 103    }
 104 }
 105
 106
 107 #endif /* P_INLINES_H */