src/mesa/drivers/dri/intel/intel_buffer_objects.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2005 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
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   9  * without limitation the rights to use, copy, modify, merge, publish,
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
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  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
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  26  **************************************************************************/
  27
  28 #ifndef INTEL_BUFFEROBJ_H
  29 #define INTEL_BUFFEROBJ_H
  30
  31 #include "main/mtypes.h"
  32
  33 struct intel_context;
  34 struct intel_region;
  35 struct gl_buffer_object;
  36
  37
  38 /**
  39  * Intel vertex/pixel buffer object, derived from Mesa's gl_buffer_object.
  40  */
  41 struct intel_buffer_object
  42 {
  43    struct gl_buffer_object Base;
  44    dri_bo *buffer;     /* the low-level buffer manager's buffer handle */
  45
  46    struct intel_region *region; /* Is there a zero-copy texture
  47                                    associated with this (pixel)
  48                                    buffer object? */
  49    GLboolean mapped_gtt;
  50 };
  51
  52
  53 /* Get the bm buffer associated with a GL bufferobject:
  54  */
  55 dri_bo *intel_bufferobj_buffer(struct intel_context *intel,
  56                                struct intel_buffer_object
  57                                *obj, GLuint flag);
  58
  59 /* Hook the bufferobject implementation into mesa:
  60  */
  61 void intel_bufferobj_init(struct intel_context *intel);
  62
  63
  64
  65 /* Are the obj->Name tests necessary?  Unfortunately yes, mesa
  66  * allocates a couple of gl_buffer_object structs statically, and
  67  * the Name == 0 test is the only way to identify them and avoid
  68  * casting them erroneously to our structs.
  69  */
  70 static INLINE struct intel_buffer_object *
  71 intel_buffer_object(struct gl_buffer_object *obj)
  72 {
  73    if (obj->Name)
  74       return (struct intel_buffer_object *) obj;
  75    else
  76       return NULL;
  77 }
  78
  79 /* Helpers for zerocopy image uploads.  See also intel_regions.h:
  80  */
  81 void intel_bufferobj_cow(struct intel_context *intel,
  82                          struct intel_buffer_object *intel_obj);
  83 void intel_bufferobj_release_region(struct intel_context *intel,
  84                                     struct intel_buffer_object *intel_obj);
  85
  86
  87 #endif