Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | RSS feed

  1. /**************************************************************************
  2.  *
  3.  * Copyright 2005 VMware, Inc.
  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 VMWARE 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 INTEL_BUFFEROBJ_H
  29. #define INTEL_BUFFEROBJ_H
  30.  
  31. #include "main/mtypes.h"
  32.  
  33. struct brw_context;
  34. struct gl_buffer_object;
  35.  
  36.  
  37. /**
  38.  * Intel vertex/pixel buffer object, derived from Mesa's gl_buffer_object.
  39.  */
  40. struct intel_buffer_object
  41. {
  42.    struct gl_buffer_object Base;
  43.    drm_intel_bo *buffer;     /* the low-level buffer manager's buffer handle */
  44.  
  45.    drm_intel_bo *range_map_bo[MAP_COUNT];
  46.  
  47.    /**
  48.     * Alignment offset from the range_map_bo temporary mapping to the returned
  49.     * obj->Pointer (caused by GL_ARB_map_buffer_alignment).
  50.     */
  51.    unsigned map_extra[MAP_COUNT];
  52.  
  53.    /** @{
  54.     * Tracking for what range of the BO may currently be in use by the GPU.
  55.     *
  56.     * Users often want to either glBufferSubData() or glMapBufferRange() a
  57.     * buffer object where some subset of it is busy on the GPU, without either
  58.     * stalling or doing an extra blit (since our blits are extra expensive,
  59.     * given that we have to reupload most of the 3D state when switching
  60.     * rings).  We wish they'd just use glMapBufferRange() with the
  61.     * UNSYNC|INVALIDATE_RANGE flag or the INVALIDATE_BUFFER flag, but lots
  62.     * don't.
  63.     *
  64.     * To work around apps, we track what range of the BO we might have used on
  65.     * the GPU as vertex data, tranform feedback output, buffer textures, etc.,
  66.     * and just do glBufferSubData() with an unsynchronized map when they're
  67.     * outside of that range.
  68.     *
  69.     * If gpu_active_start > gpu_active_end, then the GPU is not currently
  70.     * accessing the BO (and we can map it without synchronization).
  71.     */
  72.    uint32_t gpu_active_start;
  73.    uint32_t gpu_active_end;
  74.  
  75.    /**
  76.     * If we've avoided stalls/blits using the active tracking, flag the buffer
  77.     * for (occasional) stalling in the future to avoid getting stuck in a
  78.     * cycle of blitting on buffer wraparound.
  79.     */
  80.    bool prefer_stall_to_blit;
  81.    /** @} */
  82. };
  83.  
  84.  
  85. /* Get the bm buffer associated with a GL bufferobject:
  86.  */
  87. drm_intel_bo *intel_bufferobj_buffer(struct brw_context *brw,
  88.                                      struct intel_buffer_object *obj,
  89.                                      uint32_t offset,
  90.                                      uint32_t size);
  91.  
  92. void intel_upload_data(struct brw_context *brw,
  93.                        const void *data,
  94.                        uint32_t size,
  95.                        uint32_t alignment,
  96.                        drm_intel_bo **out_bo,
  97.                        uint32_t *out_offset);
  98.  
  99. void *intel_upload_space(struct brw_context *brw,
  100.                          uint32_t size,
  101.                          uint32_t alignment,
  102.                          drm_intel_bo **out_bo,
  103.                          uint32_t *out_offset);
  104.  
  105. void intel_upload_finish(struct brw_context *brw);
  106.  
  107. /* Hook the bufferobject implementation into mesa:
  108.  */
  109. void intelInitBufferObjectFuncs(struct dd_function_table *functions);
  110.  
  111. static inline struct intel_buffer_object *
  112. intel_buffer_object(struct gl_buffer_object *obj)
  113. {
  114.    return (struct intel_buffer_object *) obj;
  115. }
  116.  
  117. #endif
  118.