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

   1 /**************************************************************************
   2  *
   3  * Copyright 2005 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
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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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  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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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    /** System memory buffer data, if not using a BO to store the data. */
  46    void *sys_buffer;
  47
  48    struct intel_region *region; /* Is there a zero-copy texture
  49                                    associated with this (pixel)
  50                                    buffer object? */
  51
  52    drm_intel_bo *range_map_bo;
  53    void *range_map_buffer;
  54    unsigned int range_map_offset;
  55    GLsizei range_map_size;
  56
  57    GLboolean mapped_gtt;
  58 };
  59
  60
  61 /* Get the bm buffer associated with a GL bufferobject:
  62  */
  63 dri_bo *intel_bufferobj_buffer(struct intel_context *intel,
  64                                struct intel_buffer_object
  65                                *obj, GLuint flag);
  66
  67 /* Hook the bufferobject implementation into mesa:
  68  */
  69 void intelInitBufferObjectFuncs(struct dd_function_table *functions);
  70
  71
  72
  73 /* Are the obj->Name tests necessary?  Unfortunately yes, mesa
  74  * allocates a couple of gl_buffer_object structs statically, and
  75  * the Name == 0 test is the only way to identify them and avoid
  76  * casting them erroneously to our structs.
  77  */
  78 static INLINE struct intel_buffer_object *
  79 intel_buffer_object(struct gl_buffer_object *obj)
  80 {
  81    return (struct intel_buffer_object *) obj;
  82 }
  83
  84 /* Helpers for zerocopy image uploads.  See also intel_regions.h:
  85  */
  86 void intel_bufferobj_cow(struct intel_context *intel,
  87                          struct intel_buffer_object *intel_obj);
  88 void intel_bufferobj_release_region(struct intel_context *intel,
  89                                     struct intel_buffer_object *intel_obj);
  90
  91
  92 #endif