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