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 #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 /** Whether to use FLUSH_EXPLICIT with persistent mappings. */
  73 void
  74 u_upload_enable_flush_explicit(struct u_upload_mgr *upload);
  75
  76 /** Whether to avoid persistent mappings where available */
  77 void
  78 u_upload_disable_persistent(struct u_upload_mgr *upload);
  79
  80 /**
  81  * Destroy the upload manager.
  82  */
  83 void u_upload_destroy( struct u_upload_mgr *upload );
  84
  85 /**
  86  * Unmap upload buffer
  87  *
  88  * \param upload           Upload manager
  89  *
  90  * This must usually be called prior to firing the command stream
  91  * which references the upload buffer, as many memory managers either
  92  * don't like firing a mapped buffer or cause subsequent maps of a
  93  * fired buffer to wait.
  94  */
  95 void u_upload_unmap( struct u_upload_mgr *upload );
  96
  97 /**
  98  * Sub-allocate new memory from the upload buffer.
  99  *
 100  * \param upload           Upload manager
 101  * \param min_out_offset   Minimum offset that should be returned in out_offset.
 102  * \param size             Size of the allocation.
 103  * \param alignment        Alignment of the suballocation within the buffer
 104  * \param out_offset       Pointer to where the new buffer offset will be returned.
 105  * \param outbuf           Pointer to where the upload buffer will be returned.
 106  * \param ptr              Pointer to the allocated memory that is returned.
 107  */
 108 void u_upload_alloc(struct u_upload_mgr *upload,
 109                     unsigned min_out_offset,
 110                     unsigned size,
 111                     unsigned alignment,
 112                     unsigned *out_offset,
 113                     struct pipe_resource **outbuf,
 114                     void **ptr);
 115
 116
 117 /**
 118  * Allocate and write data to the upload buffer.
 119  *
 120  * Same as u_upload_alloc, but in addition to that, it copies "data"
 121  * to the pointer returned from u_upload_alloc.
 122  */
 123 void u_upload_data(struct u_upload_mgr *upload,
 124                    unsigned min_out_offset,
 125                    unsigned size,
 126                    unsigned alignment,
 127                    const void *data,
 128                    unsigned *out_offset,
 129                    struct pipe_resource **outbuf);
 130
 131 #ifdef __cplusplus
 132 } // extern "C" {
 133 #endif
 134
 135 #endif