src/mesa/drivers/dri/i915tex/intel_buffer_objects.h

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  27
  28 #ifndef INTEL_BUFFEROBJ_H
  29 #define INTEL_BUFFEROBJ_H
  30
  31 #include "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 };
  50
  51
  52 /* Get the bm buffer associated with a GL bufferobject:
  53  */
  54 dri_bo *intel_bufferobj_buffer(struct intel_context *intel,
  55                                struct intel_buffer_object
  56                                *obj, GLuint flag);
  57
  58 /* Hook the bufferobject implementation into mesa:
  59  */
  60 void intel_bufferobj_init(struct intel_context *intel);
  61
  62
  63
  64 /* Are the obj->Name tests necessary?  Unfortunately yes, mesa
  65  * allocates a couple of gl_buffer_object structs statically, and
  66  * the Name == 0 test is the only way to identify them and avoid
  67  * casting them erroneously to our structs.
  68  */
  69 static INLINE struct intel_buffer_object *
  70 intel_buffer_object(struct gl_buffer_object *obj)
  71 {
  72    if (obj->Name)
  73       return (struct intel_buffer_object *) obj;
  74    else
  75       return NULL;
  76 }
  77
  78 /* Helpers for zerocopy image uploads.  See also intel_regions.h:
  79  */
  80 void intel_bufferobj_cow(struct intel_context *intel,
  81                          struct intel_buffer_object *intel_obj);
  82 void intel_bufferobj_release_region(struct intel_context *intel,
  83                                     struct intel_buffer_object *intel_obj);
  84
  85
  86 #endif