src/gallium/auxiliary/util/u_upload_mgr.h

   1 /**************************************************************************
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   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 #include "pipe/p_defines.h"
  37
  38 struct pipe_context;
  39 struct pipe_resource;
  40
  41 #ifdef __cplusplus
  42 extern "C" {
  43 #endif
  44
  45 /**
  46  * Create the upload manager.
  47  *
  48  * \param pipe          Pipe driver.
  49  * \param default_size  Minimum size of the upload buffer, in bytes.
  50  * \param bind          Bitmask of PIPE_BIND_* flags.
  51  * \param usage         PIPE_USAGE_*
  52  * \param flags         bitmask of PIPE_RESOURCE_FLAG_* flags.
  53  */
  54 struct u_upload_mgr *
  55 u_upload_create(struct pipe_context *pipe, unsigned default_size,
  56                 unsigned bind, enum pipe_resource_usage usage, unsigned flags);
  57
  58 /**
  59  * Create the default uploader for pipe_context. Only pipe_context::screen
  60  * needs to be set for this to succeed.
  61  */
  62 struct u_upload_mgr *
  63 u_upload_create_default(struct pipe_context *pipe);
  64
  65 /**
  66  * Create an uploader with identical parameters as another one, but using
  67  * the given pipe_context instead.
  68  */
  69 struct u_upload_mgr *
  70 u_upload_clone(struct pipe_context *pipe, struct u_upload_mgr *upload);
  71
  72 /**
  73  * Destroy the upload manager.
  74  */
  75 void u_upload_destroy( struct u_upload_mgr *upload );
  76
  77 /**
  78  * Unmap upload buffer
  79  *
  80  * \param upload           Upload manager
  81  *
  82  * This must usually be called prior to firing the command stream
  83  * which references the upload buffer, as many memory managers either
  84  * don't like firing a mapped buffer or cause subsequent maps of a
  85  * fired buffer to wait.
  86  */
  87 void u_upload_unmap( struct u_upload_mgr *upload );
  88
  89 /**
  90  * Sub-allocate new memory from the upload buffer.
  91  *
  92  * \param upload           Upload manager
  93  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  94  * \param size             Size of the allocation.
  95  * \param alignment        Alignment of the suballocation within the buffer
  96  * \param out_offset       Pointer to where the new buffer offset will be returned.
  97  * \param outbuf           Pointer to where the upload buffer will be returned.
  98  * \param ptr              Pointer to the allocated memory that is returned.
  99  */
 100 void u_upload_alloc(struct u_upload_mgr *upload,
 101                     unsigned min_out_offset,
 102                     unsigned size,
 103                     unsigned alignment,
 104                     unsigned *out_offset,
 105                     struct pipe_resource **outbuf,
 106                     void **ptr);
 107
 108
 109 /**
 110  * Allocate and write data to the upload buffer.
 111  *
 112  * Same as u_upload_alloc, but in addition to that, it copies "data"
 113  * to the pointer returned from u_upload_alloc.
 114  */
 115 void u_upload_data(struct u_upload_mgr *upload,
 116                    unsigned min_out_offset,
 117                    unsigned size,
 118                    unsigned alignment,
 119                    const void *data,
 120                    unsigned *out_offset,
 121                    struct pipe_resource **outbuf);
 122
 123 #ifdef __cplusplus
 124 } // extern "C" {
 125 #endif
 126
 127 #endif