src/gallium/auxiliary/util/u_vbuf.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2011 Marek Olšák <maraeo@gmail.com>
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef U_VBUF_MGR_H
  29 #define U_VBUF_MGR_H
  30
  31 /* This module builds upon u_upload_mgr and translate_cache and takes care of
  32  * user buffer uploads and vertex format fallbacks. It's designed
  33  * for the drivers which don't always use the Draw module. (e.g. for HWTCL)
  34  */
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_state.h"
  38 #include "util/u_transfer.h"
  39
  40 /* Hardware vertex fetcher limitations can be described by this structure. */
  41 struct u_vbuf_caps {
  42    /* Vertex format CAPs. */
  43    /* TRUE if hardware supports it. */
  44    unsigned format_fixed32:1;    /* PIPE_FORMAT_*32*_FIXED */
  45    unsigned format_float16:1;    /* PIPE_FORMAT_*16*_FLOAT */
  46    unsigned format_float64:1;    /* PIPE_FORMAT_*64*_FLOAT */
  47    unsigned format_norm32:1;     /* PIPE_FORMAT_*32*NORM */
  48    unsigned format_scaled32:1;   /* PIPE_FORMAT_*32*SCALED */
  49
  50    /* Whether vertex fetches don't have to be dword-aligned. */
  51    /* TRUE if hardware supports it. */
  52    unsigned fetch_dword_unaligned:1;
  53 };
  54
  55 /* The manager.
  56  * This structure should also be used to access vertex buffers
  57  * from a driver. */
  58 struct u_vbuf {
  59    /* This is what was set in set_vertex_buffers.
  60     * May contain user buffers. */
  61    struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
  62    unsigned nr_vertex_buffers;
  63
  64    /* This uploader can optionally be used by the driver.
  65     *
  66     * Allowed functions:
  67     * - u_upload_alloc
  68     * - u_upload_data
  69     * - u_upload_buffer
  70     * - u_upload_flush */
  71    struct u_upload_mgr *uploader;
  72
  73    struct u_vbuf_caps caps;
  74
  75    /* Vertex elements state as created by u_vbuf.
  76     * This is used when saving the state into u_blitter, there's no other
  77     * usage. */
  78    void *vertex_elements;
  79 };
  80
  81 /* XXX this is no longer needed and can be removed */
  82 struct u_vbuf_resource {
  83    struct u_resource b;
  84    uint8_t *user_ptr;
  85 };
  86
  87 enum u_fetch_alignment {
  88    U_VERTEX_FETCH_BYTE_ALIGNED,
  89    U_VERTEX_FETCH_DWORD_ALIGNED
  90 };
  91
  92
  93 struct u_vbuf *
  94 u_vbuf_create(struct pipe_context *pipe,
  95               unsigned upload_buffer_size,
  96               unsigned upload_buffer_alignment,
  97               unsigned upload_buffer_bind,
  98               enum u_fetch_alignment fetch_alignment);
  99
 100 void u_vbuf_destroy(struct u_vbuf *mgr);
 101
 102 unsigned u_vbuf_draw_max_vertex_count(struct u_vbuf *mgr);
 103
 104
 105 static INLINE struct u_vbuf_resource *u_vbuf_resource(struct pipe_resource *r)
 106 {
 107    return (struct u_vbuf_resource*)r;
 108 }
 109
 110 #endif