src/gallium/drivers/llvmpipe/lp_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 "pipe/internal/p_winsys_screen.h"
  37 #include "pipe/p_inlines.h"
  38 #include "util/u_prim.h"
  39
  40 #include "lp_context.h"
  41 #include "lp_state.h"
  42
  43 #include "draw/draw_context.h"
  44
  45
  46
  47 static void
  48 llvmpipe_map_constant_buffers(struct llvmpipe_context *lp)
  49 {
  50    struct pipe_screen *screen = lp->pipe.screen;
  51    uint i, size;
  52
  53    for (i = 0; i < PIPE_SHADER_TYPES; i++) {
  54       if (lp->constants[i].buffer && lp->constants[i].buffer->size)
  55          lp->mapped_constants[i] = screen->buffer_map(screen, lp->constants[i].buffer,
  56                                                       PIPE_BUFFER_USAGE_CPU_READ);
  57    }
  58
  59    if (lp->constants[PIPE_SHADER_VERTEX].buffer)
  60       size = lp->constants[PIPE_SHADER_VERTEX].buffer->size;
  61    else
  62       size = 0;
  63
  64    lp->jit_context.constants = lp->mapped_constants[PIPE_SHADER_FRAGMENT];
  65
  66    draw_set_mapped_constant_buffer(lp->draw,
  67                                    lp->mapped_constants[PIPE_SHADER_VERTEX],
  68                                    size);
  69 }
  70
  71
  72 static void
  73 llvmpipe_unmap_constant_buffers(struct llvmpipe_context *lp)
  74 {
  75    struct pipe_screen *screen = lp->pipe.screen;
  76    uint i;
  77
  78    /* really need to flush all prims since the vert/frag shaders const buffers
  79     * are going away now.
  80     */
  81    draw_flush(lp->draw);
  82
  83    draw_set_mapped_constant_buffer(lp->draw, NULL, 0);
  84
  85    lp->jit_context.constants = NULL;
  86
  87    for (i = 0; i < 2; i++) {
  88       if (lp->constants[i].buffer && lp->constants[i].buffer->size)
  89          screen->buffer_unmap(screen, lp->constants[i].buffer);
  90       lp->mapped_constants[i] = NULL;
  91    }
  92 }
  93
  94
  95 boolean
  96 llvmpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
  97                      unsigned start, unsigned count)
  98 {
  99    return llvmpipe_draw_elements(pipe, NULL, 0, mode, start, count);
 100 }
 101
 102
 103 /**
 104  * Draw vertex arrays, with optional indexing.
 105  * Basically, map the vertex buffers (and drawing surfaces), then hand off
 106  * the drawing to the 'draw' module.
 107  */
 108 boolean
 109 llvmpipe_draw_range_elements(struct pipe_context *pipe,
 110                              struct pipe_buffer *indexBuffer,
 111                              unsigned indexSize,
 112                              unsigned min_index,
 113                              unsigned max_index,
 114                              unsigned mode, unsigned start, unsigned count)
 115 {
 116    struct llvmpipe_context *lp = llvmpipe_context(pipe);
 117    struct draw_context *draw = lp->draw;
 118    unsigned i;
 119
 120    lp->reduced_api_prim = u_reduced_prim(mode);
 121
 122    if (lp->dirty)
 123       llvmpipe_update_derived( lp );
 124
 125    llvmpipe_map_transfers(lp);
 126    llvmpipe_map_constant_buffers(lp);
 127
 128    /*
 129     * Map vertex buffers
 130     */
 131    for (i = 0; i < lp->num_vertex_buffers; i++) {
 132       void *buf
 133          = pipe_buffer_map(pipe->screen,
 134                                     lp->vertex_buffer[i].buffer,
 135                                     PIPE_BUFFER_USAGE_CPU_READ);
 136       draw_set_mapped_vertex_buffer(draw, i, buf);
 137    }
 138
 139    /* Map index buffer, if present */
 140    if (indexBuffer) {
 141       void *mapped_indexes
 142          = pipe_buffer_map(pipe->screen, indexBuffer,
 143                                     PIPE_BUFFER_USAGE_CPU_READ);
 144       draw_set_mapped_element_buffer_range(draw, indexSize,
 145                                            min_index,
 146                                            max_index,
 147                                            mapped_indexes);
 148    }
 149    else {
 150       /* no index/element buffer */
 151       draw_set_mapped_element_buffer_range(draw, 0, start,
 152                                            start + count - 1, NULL);
 153    }
 154
 155    /* draw! */
 156    draw_arrays(draw, mode, start, count);
 157
 158    /*
 159     * unmap vertex/index buffers - will cause draw module to flush
 160     */
 161    for (i = 0; i < lp->num_vertex_buffers; i++) {
 162       draw_set_mapped_vertex_buffer(draw, i, NULL);
 163       pipe_buffer_unmap(pipe->screen, lp->vertex_buffer[i].buffer);
 164    }
 165    if (indexBuffer) {
 166       draw_set_mapped_element_buffer(draw, 0, NULL);
 167       pipe_buffer_unmap(pipe->screen, indexBuffer);
 168    }
 169
 170
 171    /* Note: leave drawing surfaces mapped */
 172    llvmpipe_unmap_constant_buffers(lp);
 173
 174    lp->dirty_render_cache = TRUE;
 175
 176    return TRUE;
 177 }
 178
 179
 180 boolean
 181 llvmpipe_draw_elements(struct pipe_context *pipe,
 182                        struct pipe_buffer *indexBuffer,
 183                        unsigned indexSize,
 184                        unsigned mode, unsigned start, unsigned count)
 185 {
 186    return llvmpipe_draw_range_elements( pipe, indexBuffer,
 187                                         indexSize,
 188                                         0, 0xffffffff,
 189                                         mode, start, count );
 190 }
 191
 192
 193 void
 194 llvmpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
 195 {
 196    struct llvmpipe_context *lp = llvmpipe_context(pipe);
 197    draw_set_edgeflags(lp->draw, edgeflags);
 198 }