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_element_buffer_range(draw,
  79                                         0, 0,
  80                                         start,
  81                                         start + count - 1,
  82                                         NULL);
  83
  84    /* draw! */
  85    draw_arrays_instanced(draw, mode, start, count, 0, 1);
  86
  87    /* unmap vertex/index buffers - will cause draw module to flush */
  88    draw_set_mapped_vertex_buffer(draw, 0, NULL);
  89
  90    /*
  91     * TODO: Flush only when a user vertex/index buffer is present
  92     * (or even better, modify draw module to do this
  93     * internally when this condition is seen?)
  94     */
  95    draw_flush(draw);
  96
  97    /* Note: leave drawing surfaces mapped */
  98    sp->dirty_render_cache = TRUE;
  99 }
 100
 101
 102 /**
 103  * This function handles drawing indexed and non-indexed prims,
 104  * instanced and non-instanced drawing, with or without min/max element
 105  * indexes.
 106  * All the other drawing functions are expressed in terms of this
 107  * function.
 108  *
 109  * For non-indexed prims, indexBuffer should be NULL.
 110  * For non-instanced drawing, instanceCount should be 1.
 111  * When the min/max element indexes aren't known, minIndex should be 0
 112  * and maxIndex should be ~0.
 113  */
 114 void
 115 softpipe_draw_vbo(struct pipe_context *pipe,
 116                   const struct pipe_draw_info *info)
 117 {
 118    struct softpipe_context *sp = softpipe_context(pipe);
 119    struct draw_context *draw = sp->draw;
 120    void *mapped_indices = NULL;
 121    unsigned i;
 122
 123    if (!softpipe_check_render_cond(sp))
 124       return;
 125
 126    sp->reduced_api_prim = u_reduced_prim(info->mode);
 127
 128    if (sp->dirty) {
 129       softpipe_update_derived(sp);
 130    }
 131
 132    softpipe_map_transfers(sp);
 133
 134    /* Map vertex buffers */
 135    for (i = 0; i < sp->num_vertex_buffers; i++) {
 136       void *buf = softpipe_resource(sp->vertex_buffer[i].buffer)->data;
 137       draw_set_mapped_vertex_buffer(draw, i, buf);
 138    }
 139
 140    /* Map index buffer, if present */
 141    if (info->indexed && sp->index_buffer.buffer) {
 142       char *indices = (char *) softpipe_resource(sp->index_buffer.buffer)->data;
 143       mapped_indices = (void *) (indices + sp->index_buffer.offset);
 144    }
 145
 146    draw_set_mapped_element_buffer_range(draw, (mapped_indices) ?
 147                                         sp->index_buffer.index_size : 0,
 148                                         info->index_bias,
 149                                         info->min_index,
 150                                         info->max_index,
 151                                         mapped_indices);
 152
 153    /* draw! */
 154    draw_arrays_instanced(draw, info->mode, info->start, info->count,
 155          info->start_instance, info->instance_count);
 156
 157    /* unmap vertex/index buffers - will cause draw module to flush */
 158    for (i = 0; i < sp->num_vertex_buffers; i++) {
 159       draw_set_mapped_vertex_buffer(draw, i, NULL);
 160    }
 161    if (mapped_indices) {
 162       draw_set_mapped_element_buffer(draw, 0, 0, NULL);
 163    }
 164
 165    /*
 166     * TODO: Flush only when a user vertex/index buffer is present
 167     * (or even better, modify draw module to do this
 168     * internally when this condition is seen?)
 169     */
 170    draw_flush(draw);
 171
 172    /* Note: leave drawing surfaces mapped */
 173    sp->dirty_render_cache = TRUE;
 174 }