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 #include "pipe/p_defines.h"
  37
  38 struct pipe_context;
  39 struct pipe_resource;
  40
  41
  42 /**
  43  * Create the upload manager.
  44  *
  45  * \param pipe          Pipe driver.
  46  * \param default_size  Minimum size of the upload buffer, in bytes.
  47  * \param bind          Bitmask of PIPE_BIND_* flags.
  48  * \param usage         PIPE_USAGE_*
  49  */
  50 struct u_upload_mgr *
  51 u_upload_create(struct pipe_context *pipe, unsigned default_size,
  52                 unsigned bind, enum pipe_resource_usage usage);
  53
  54 /**
  55  * Create the default uploader for pipe_context. Only pipe_context::screen
  56  * needs to be set for this to succeed.
  57  */
  58 struct u_upload_mgr *
  59 u_upload_create_default(struct pipe_context *pipe);
  60
  61 /**
  62  * Destroy the upload manager.
  63  */
  64 void u_upload_destroy( struct u_upload_mgr *upload );
  65
  66 /**
  67  * Unmap upload buffer
  68  *
  69  * \param upload           Upload manager
  70  *
  71  * This must usually be called prior to firing the command stream
  72  * which references the upload buffer, as many memory managers either
  73  * don't like firing a mapped buffer or cause subsequent maps of a
  74  * fired buffer to wait.
  75  */
  76 void u_upload_unmap( struct u_upload_mgr *upload );
  77
  78 /**
  79  * Sub-allocate new memory from the upload buffer.
  80  *
  81  * \param upload           Upload manager
  82  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  83  * \param size             Size of the allocation.
  84  * \param alignment        Alignment of the suballocation within the buffer
  85  * \param out_offset       Pointer to where the new buffer offset will be returned.
  86  * \param outbuf           Pointer to where the upload buffer will be returned.
  87  * \param ptr              Pointer to the allocated memory that is returned.
  88  */
  89 void u_upload_alloc(struct u_upload_mgr *upload,
  90                     unsigned min_out_offset,
  91                     unsigned size,
  92                     unsigned alignment,
  93                     unsigned *out_offset,
  94                     struct pipe_resource **outbuf,
  95                     void **ptr);
  96
  97
  98 /**
  99  * Allocate and write data to the upload buffer.
 100  *
 101  * Same as u_upload_alloc, but in addition to that, it copies "data"
 102  * to the pointer returned from u_upload_alloc.
 103  */
 104 void u_upload_data(struct u_upload_mgr *upload,
 105                    unsigned min_out_offset,
 106                    unsigned size,
 107                    unsigned alignment,
 108                    const void *data,
 109                    unsigned *out_offset,
 110                    struct pipe_resource **outbuf);
 111
 112 #endif