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
   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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  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    drm_intel_bo *buffer;     /* the low-level buffer manager's buffer handle */
  45    GLuint offset;            /* any offset into that buffer */
  46
  47    /** System memory buffer data, if not using a BO to store the data. */
  48    void *sys_buffer;
  49
  50    struct intel_region *region; /* Is there a zero-copy texture
  51                                    associated with this (pixel)
  52                                    buffer object? */
  53
  54    drm_intel_bo *range_map_bo;
  55    void *range_map_buffer;
  56    unsigned int range_map_offset;
  57    GLsizei range_map_size;
  58
  59    GLboolean mapped_gtt;
  60    GLboolean source;
  61 };
  62
  63
  64 /* Get the bm buffer associated with a GL bufferobject:
  65  */
  66 drm_intel_bo *intel_bufferobj_buffer(struct intel_context *intel,
  67                                      struct intel_buffer_object *obj,
  68                                      GLuint flag);
  69 drm_intel_bo *intel_bufferobj_source(struct intel_context *intel,
  70                                      struct intel_buffer_object *obj,
  71                                      GLuint *offset);
  72
  73 void intel_upload_data(struct intel_context *intel,
  74                        const void *ptr, GLuint size, GLuint align,
  75                        drm_intel_bo **return_bo,
  76                        GLuint *return_offset);
  77
  78 void *intel_upload_map(struct intel_context *intel,
  79                        GLuint size, GLuint align);
  80 void intel_upload_unmap(struct intel_context *intel,
  81                         const void *ptr, GLuint size, GLuint align,
  82                         drm_intel_bo **return_bo,
  83                         GLuint *return_offset);
  84
  85 void intel_upload_finish(struct intel_context *intel);
  86
  87 /* Hook the bufferobject implementation into mesa:
  88  */
  89 void intelInitBufferObjectFuncs(struct dd_function_table *functions);
  90
  91
  92
  93 /* Are the obj->Name tests necessary?  Unfortunately yes, mesa
  94  * allocates a couple of gl_buffer_object structs statically, and
  95  * the Name == 0 test is the only way to identify them and avoid
  96  * casting them erroneously to our structs.
  97  */
  98 static INLINE struct intel_buffer_object *
  99 intel_buffer_object(struct gl_buffer_object *obj)
 100 {
 101    return (struct intel_buffer_object *) obj;
 102 }
 103
 104 /* Helpers for zerocopy image uploads.  See also intel_regions.h:
 105  */
 106 void intel_bufferobj_cow(struct intel_context *intel,
 107                          struct intel_buffer_object *intel_obj);
 108 void intel_bufferobj_release_region(struct intel_context *intel,
 109                                     struct intel_buffer_object *intel_obj);
 110
 111
 112 #endif