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

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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,
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  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_REGIONS_H
  29 #define INTEL_REGIONS_H
  30
  31 /** @file intel_regions.h
  32  *
  33  * Structure definitions and prototypes for intel_region handling,
  34  * which is the basic structure for rectangular collections of pixels
  35  * stored in a drm_intel_bo.
  36  */
  37
  38 #include <stdbool.h>
  39 #include <xf86drm.h>
  40
  41 #include "main/mtypes.h"
  42 #include "intel_bufmgr.h"
  43
  44 struct intel_context;
  45 struct intel_buffer_object;
  46
  47 /**
  48  * A layer on top of the bufmgr buffers that adds a few useful things:
  49  *
  50  * - Refcounting for local buffer references.
  51  * - Refcounting for buffer maps
  52  * - Buffer dimensions - pitch and height.
  53  * - Blitter commands for copying 2D regions between buffers. (really???)
  54  */
  55 struct intel_region
  56 {
  57    drm_intel_bo *bo;  /**< buffer manager's buffer */
  58    GLuint refcount; /**< Reference count for region */
  59    GLuint cpp;      /**< bytes per pixel */
  60    GLuint width;    /**< in pixels */
  61    GLuint height;   /**< in pixels */
  62    GLuint pitch;    /**< in pixels */
  63    GLubyte *map;    /**< only non-NULL when region is actually mapped */
  64    GLuint map_refcount;  /**< Reference count for mapping */
  65
  66    uint32_t tiling; /**< Which tiling mode the region is in */
  67
  68    uint32_t name; /**< Global name for the bo */
  69    struct intel_screen *screen;
  70 };
  71
  72
  73 /* Allocate a refcounted region.  Pointers to regions should only be
  74  * copied by calling intel_reference_region().
  75  */
  76 struct intel_region *intel_region_alloc(struct intel_screen *screen,
  77                                         uint32_t tiling,
  78                                         GLuint cpp, GLuint width,
  79                                         GLuint height,
  80                                         bool expect_accelerated_upload);
  81
  82 struct intel_region *
  83 intel_region_alloc_for_handle(struct intel_screen *screen,
  84                               GLuint cpp,
  85                               GLuint width, GLuint height, GLuint pitch,
  86                               unsigned int handle, const char *name);
  87
  88 bool
  89 intel_region_flink(struct intel_region *region, uint32_t *name);
  90
  91 void intel_region_reference(struct intel_region **dst,
  92                             struct intel_region *src);
  93
  94 void intel_region_release(struct intel_region **ib);
  95
  96 void intel_recreate_static_regions(struct intel_context *intel);
  97
  98 /**
  99  * Map/unmap regions.  This is refcounted also:
 100  *
 101  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 102  */
 103 GLubyte *intel_region_map(struct intel_context *intel,
 104                           struct intel_region *ib,
 105                           GLbitfield mode);
 106
 107 void intel_region_unmap(struct intel_context *intel, struct intel_region *ib);
 108
 109 /* Copy rectangular sub-regions
 110  */
 111 bool
 112 intel_region_copy(struct intel_context *intel,
 113                   struct intel_region *dest,
 114                   GLuint dest_offset,
 115                   GLuint destx, GLuint desty,
 116                   struct intel_region *src,
 117                   GLuint src_offset,
 118                   GLuint srcx, GLuint srcy, GLuint width, GLuint height,
 119                   bool flip,
 120                   GLenum logicop);
 121
 122 void _mesa_copy_rect(GLubyte * dst,
 123                 GLuint cpp,
 124                 GLuint dst_pitch,
 125                 GLuint dst_x,
 126                 GLuint dst_y,
 127                 GLuint width,
 128                 GLuint height,
 129                 const GLubyte * src,
 130                 GLuint src_pitch, GLuint src_x, GLuint src_y);
 131
 132 struct __DRIimageRec {
 133    struct intel_region *region;
 134    GLenum internal_format;
 135    GLuint format;
 136    GLenum data_type;
 137    void *data;
 138 };
 139
 140 #endif