workbench/libs/mesa/src/gallium/drivers/softpipe/sp_draw_arrays.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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 /* Author:
  29  *    Brian Paul
  30  *    Keith Whitwell
  31  */
  32
  33
  34 #include "pipe/p_defines.h"
  35 #include "pipe/p_context.h"
  36 #include "util/u_inlines.h"
  37 #include "util/u_prim.h"
  38
  39 #include "sp_context.h"
  40 #include "sp_query.h"
  41 #include "sp_state.h"
  42 #include "sp_texture.h"
  43
  44 #include "draw/draw_context.h"
  45
  46
  47
  48
  49
  50 void
  51 softpipe_draw_stream_output(struct pipe_context *pipe, unsigned mode)
  52 {
  53    struct softpipe_context *sp = softpipe_context(pipe);
  54    struct draw_context *draw = sp->draw;
  55    const unsigned start = 0;
  56    const unsigned count = sp->so_target.so_count[0];
  57    void *buf = sp->so_target.buffer[0]->data;
  58    int offset = sp->so_target.offset[0];
  59
  60    if (!softpipe_check_render_cond(sp) ||
  61        sp->so_target.num_buffers != 1)
  62       return;
  63
  64    sp->reduced_api_prim = u_reduced_prim(mode);
  65
  66    if (sp->dirty) {
  67       softpipe_update_derived(sp);
  68    }
  69
  70    softpipe_map_transfers(sp);
  71
  72    /* Map so buffers */
  73    if (offset < 0) /* we were appending so start from beginning */
  74       offset = 0;
  75    buf = (void*)((int32_t*)buf + offset);
  76    draw_set_mapped_vertex_buffer(draw, 0, buf);
  77
  78    draw_set_mapped_index_buffer(draw, NULL);
  79
  80    /* draw! */
  81    draw_arrays(draw, mode, start, count);
  82
  83    /* unmap vertex/index buffers - will cause draw module to flush */
  84    draw_set_mapped_vertex_buffer(draw, 0, NULL);
  85
  86    /*
  87     * TODO: Flush only when a user vertex/index buffer is present
  88     * (or even better, modify draw module to do this
  89     * internally when this condition is seen?)
  90     */
  91    draw_flush(draw);
  92
  93    /* Note: leave drawing surfaces mapped */
  94    sp->dirty_render_cache = TRUE;
  95 }
  96
  97
  98 /**
  99  * This function handles drawing indexed and non-indexed prims,
 100  * instanced and non-instanced drawing, with or without min/max element
 101  * indexes.
 102  * All the other drawing functions are expressed in terms of this
 103  * function.
 104  *
 105  * For non-indexed prims, indexBuffer should be NULL.
 106  * For non-instanced drawing, instanceCount should be 1.
 107  * When the min/max element indexes aren't known, minIndex should be 0
 108  * and maxIndex should be ~0.
 109  */
 110 void
 111 softpipe_draw_vbo(struct pipe_context *pipe,
 112                   const struct pipe_draw_info *info)
 113 {
 114    struct softpipe_context *sp = softpipe_context(pipe);
 115    struct draw_context *draw = sp->draw;
 116    void *mapped_indices = NULL;
 117    unsigned i;
 118
 119    if (!softpipe_check_render_cond(sp))
 120       return;
 121
 122    sp->reduced_api_prim = u_reduced_prim(info->mode);
 123
 124    if (sp->dirty) {
 125       softpipe_update_derived(sp);
 126    }
 127
 128    softpipe_map_transfers(sp);
 129
 130    /* Map vertex buffers */
 131    for (i = 0; i < sp->num_vertex_buffers; i++) {
 132       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 133       draw_set_mapped_vertex_buffer(draw, i, buf);
 134    }
 135
 136    /* Map index buffer, if present */
 137    if (info->indexed && sp->index_buffer.buffer)
 138       mapped_indices = softpipe_resource(sp->index_buffer.buffer)->data;
 139
 140    draw_set_mapped_index_buffer(draw, mapped_indices);
 141
 142    /* draw! */
 143    draw_vbo(draw, info);
 144
 145    /* unmap vertex/index buffers - will cause draw module to flush */
 146    for (i = 0; i < sp->num_vertex_buffers; i++) {
 147       draw_set_mapped_vertex_buffer(draw, i, NULL);
 148    }
 149    if (mapped_indices) {
 150       draw_set_mapped_index_buffer(draw, NULL);
 151    }
 152
 153    /*
 154     * TODO: Flush only when a user vertex/index buffer is present
 155     * (or even better, modify draw module to do this
 156     * internally when this condition is seen?)
 157     */
 158    draw_flush(draw);
 159
 160    /* Note: leave drawing surfaces mapped */
 161    sp->dirty_render_cache = TRUE;
 162 }