src/gallium/auxiliary/util/u_upload_mgr.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
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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 /* Unmap and release old buffer.
  60  *
  61  * This must usually be called prior to firing the command stream
  62  * which references the upload buffer, as many memory managers either
  63  * don't like firing a mapped buffer or cause subsequent maps of a
  64  * fired buffer to wait.  For now, it's easiest just to grab a new
  65  * buffer.
  66  */
  67 void u_upload_flush( struct u_upload_mgr *upload );
  68
  69 /**
  70  * Sub-allocate new memory from the upload buffer.
  71  *
  72  * \param upload           Upload manager
  73  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  74  * \param size             Size of the allocation.
  75  * \param out_offset       Pointer to where the new buffer offset will be returned.
  76  * \param outbuf           Pointer to where the upload buffer will be returned.
  77  * \param flushed          Whether the upload buffer was flushed.
  78  * \param ptr              Pointer to the allocated memory that is returned.
  79  */
  80 enum pipe_error u_upload_alloc( struct u_upload_mgr *upload,
  81                                 unsigned min_out_offset,
  82                                 unsigned size,
  83                                 unsigned *out_offset,
  84                                 struct pipe_resource **outbuf,
  85                                 boolean *flushed,
  86                                 void **ptr );
  87
  88
  89 /**
  90  * Allocate and write data to the upload buffer.
  91  *
  92  * Same as u_upload_alloc, but in addition to that, it copies "data"
  93  * to the pointer returned from u_upload_alloc.
  94  */
  95 enum pipe_error u_upload_data( struct u_upload_mgr *upload,
  96                                unsigned min_out_offset,
  97                                unsigned size,
  98                                const void *data,
  99                                unsigned *out_offset,
 100                                struct pipe_resource **outbuf,
 101                                boolean *flushed );
 102
 103
 104 /**
 105  * Allocate and copy an input buffer to the upload buffer.
 106  *
 107  * Same as u_upload_data, except that the input data comes from a buffer
 108  * instead of a user pointer.
 109  */
 110 enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
 111                                  unsigned min_out_offset,
 112                                  unsigned offset,
 113                                  unsigned size,
 114                                  struct pipe_resource *inbuf,
 115                                  unsigned *out_offset,
 116                                  struct pipe_resource **outbuf,
 117                                  boolean *flushed );
 118
 119
 120
 121 #endif
 122