src/gallium/auxiliary/util/u_upload_mgr.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
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  16  * of the Software.
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  27
  28 /* Helper utility for uploading user buffers & other data, and
  29  * coalescing small buffers into larger ones.
  30  */
  31
  32 #ifndef U_UPLOAD_MGR_H
  33 #define U_UPLOAD_MGR_H
  34
  35 #include "pipe/p_compiler.h"
  36
  37 struct pipe_context;
  38 struct pipe_resource;
  39
  40
  41 /**
  42  * Create the upload manager.
  43  *
  44  * \param pipe          Pipe driver.
  45  * \param default_size  Minimum size of the upload buffer, in bytes.
  46  * \param alignment     Alignment of each suballocation in the upload buffer.
  47  * \param bind          Bitmask of PIPE_BIND_* flags.
  48  */
  49 struct u_upload_mgr *u_upload_create( struct pipe_context *pipe,
  50                                       unsigned default_size,
  51                                       unsigned alignment,
  52                                       unsigned bind );
  53
  54 /**
  55  * Destroy the upload manager.
  56  */
  57 void u_upload_destroy( struct u_upload_mgr *upload );
  58
  59 /**
  60  * Unmap upload buffer
  61  *
  62  * \param upload           Upload manager
  63  *
  64  * This must usually be called prior to firing the command stream
  65  * which references the upload buffer, as many memory managers either
  66  * don't like firing a mapped buffer or cause subsequent maps of a
  67  * fired buffer to wait.
  68  */
  69 void u_upload_unmap( struct u_upload_mgr *upload );
  70
  71 /**
  72  * Sub-allocate new memory from the upload buffer.
  73  *
  74  * \param upload           Upload manager
  75  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  76  * \param size             Size of the allocation.
  77  * \param alignment        Alignment of the suballocation within the buffer
  78  * \param out_offset       Pointer to where the new buffer offset will be returned.
  79  * \param outbuf           Pointer to where the upload buffer will be returned.
  80  * \param ptr              Pointer to the allocated memory that is returned.
  81  */
  82 void u_upload_alloc(struct u_upload_mgr *upload,
  83                     unsigned min_out_offset,
  84                     unsigned size,
  85                     unsigned alignment,
  86                     unsigned *out_offset,
  87                     struct pipe_resource **outbuf,
  88                     void **ptr);
  89
  90
  91 /**
  92  * Allocate and write data to the upload buffer.
  93  *
  94  * Same as u_upload_alloc, but in addition to that, it copies "data"
  95  * to the pointer returned from u_upload_alloc.
  96  */
  97 void u_upload_data(struct u_upload_mgr *upload,
  98                    unsigned min_out_offset,
  99                    unsigned size,
 100                    const void *data,
 101                    unsigned *out_offset,
 102                    struct pipe_resource **outbuf);
 103
 104
 105 /**
 106  * Allocate space in an upload buffer and copy an input buffer to it.
 107  *
 108  * Same as u_upload_data, except that the input data comes from a buffer
 109  * instead of a user pointer.
 110  */
 111 void u_upload_buffer(struct u_upload_mgr *upload,
 112                      unsigned min_out_offset,
 113                      unsigned offset,
 114                      unsigned size,
 115                      struct pipe_resource *inbuf,
 116                      unsigned *out_offset,
 117                      struct pipe_resource **outbuf);
 118
 119
 120
 121 #endif
 122