src/gallium/auxiliary/util/u_upload_mgr.h

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   3  * Copyright 2009 VMware, Inc.
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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 and release old upload buffer.
  61  *
  62  * This is like u_upload_unmap() except the upload buffer is released for
  63  * recycling. This should be called on real hardware flushes on systems
  64  * that don't support the PIPE_TRANSFER_UNSYNCHRONIZED flag, as otherwise
  65  * the next u_upload_buffer will cause a sync on the buffer.
  66  */
  67 void u_upload_flush( struct u_upload_mgr *upload );
  68
  69 /**
  70  * Unmap upload buffer
  71  *
  72  * \param upload           Upload manager
  73  *
  74  * This must usually be called prior to firing the command stream
  75  * which references the upload buffer, as many memory managers either
  76  * don't like firing a mapped buffer or cause subsequent maps of a
  77  * fired buffer to wait.
  78  */
  79 void u_upload_unmap( struct u_upload_mgr *upload );
  80
  81 /**
  82  * Sub-allocate new memory from the upload buffer.
  83  *
  84  * \param upload           Upload manager
  85  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  86  * \param size             Size of the allocation.
  87  * \param out_offset       Pointer to where the new buffer offset will be returned.
  88  * \param outbuf           Pointer to where the upload buffer will be returned.
  89  * \param ptr              Pointer to the allocated memory that is returned.
  90  */
  91 enum pipe_error u_upload_alloc( struct u_upload_mgr *upload,
  92                                 unsigned min_out_offset,
  93                                 unsigned size,
  94                                 unsigned *out_offset,
  95                                 struct pipe_resource **outbuf,
  96                                 void **ptr );
  97
  98
  99 /**
 100  * Allocate and write data to the upload buffer.
 101  *
 102  * Same as u_upload_alloc, but in addition to that, it copies "data"
 103  * to the pointer returned from u_upload_alloc.
 104  */
 105 enum pipe_error u_upload_data( struct u_upload_mgr *upload,
 106                                unsigned min_out_offset,
 107                                unsigned size,
 108                                const void *data,
 109                                unsigned *out_offset,
 110                                struct pipe_resource **outbuf);
 111
 112
 113 /**
 114  * Allocate space in an upload buffer and copy an input buffer to it.
 115  *
 116  * Same as u_upload_data, except that the input data comes from a buffer
 117  * instead of a user pointer.
 118  */
 119 enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
 120                                  unsigned min_out_offset,
 121                                  unsigned offset,
 122                                  unsigned size,
 123                                  struct pipe_resource *inbuf,
 124                                  unsigned *out_offset,
 125                                  struct pipe_resource **outbuf);
 126
 127
 128
 129 #endif
 130