sp_draw_arrays.c revision 27e46611f04108765fa99890822a474820d5c563 
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/p_winsys.h"
37
38#include "sp_context.h"
39#include "sp_state.h"
40
41#include "draw/draw_context.h"
42
43
44
45static void
46softpipe_map_constant_buffers(struct softpipe_context *sp)
47{
48   struct pipe_winsys *ws = sp->pipe.winsys;
49   uint i;
50   for (i = 0; i < 2; i++) {
51      if (sp->constants[i].size)
52         sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
53                                                  PIPE_BUFFER_USAGE_CPU_READ);
54   }
55
56   draw_set_mapped_constant_buffer(sp->draw,
57                                   sp->mapped_constants[PIPE_SHADER_VERTEX]);
58}
59
60static void
61softpipe_unmap_constant_buffers(struct softpipe_context *sp)
62{
63   struct pipe_winsys *ws = sp->pipe.winsys;
64   uint i;
65
66   /* really need to flush all prims since the vert/frag shaders const buffers
67    * are going away now.
68    */
69   draw_flush(sp->draw);
70
71   draw_set_mapped_constant_buffer(sp->draw, NULL);
72
73   for (i = 0; i < 2; i++) {
74      if (sp->constants[i].size)
75         ws->buffer_unmap(ws, sp->constants[i].buffer);
76      sp->mapped_constants[i] = NULL;
77   }
78}
79
80
81static unsigned reduced_prim[PIPE_PRIM_POLYGON + 1] = {
82   PIPE_PRIM_POINTS,
83   PIPE_PRIM_LINES,
84   PIPE_PRIM_LINES,
85   PIPE_PRIM_LINES,
86   PIPE_PRIM_TRIANGLES,
87   PIPE_PRIM_TRIANGLES,
88   PIPE_PRIM_TRIANGLES,
89   PIPE_PRIM_TRIANGLES,
90   PIPE_PRIM_TRIANGLES,
91   PIPE_PRIM_TRIANGLES
92};
93
94
95boolean
96softpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
97                     unsigned start, unsigned count)
98{
99   return softpipe_draw_elements(pipe, NULL, 0, mode, start, count);
100}
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 * XXX should the element buffer be specified/bound with a separate function?
110 */
111boolean
112softpipe_draw_elements(struct pipe_context *pipe,
113                       struct pipe_buffer *indexBuffer,
114                       unsigned indexSize,
115                       unsigned mode, unsigned start, unsigned count)
116{
117   struct softpipe_context *sp = softpipe_context(pipe);
118   struct draw_context *draw = sp->draw;
119   unsigned i;
120
121   sp->reduced_api_prim = reduced_prim[mode];
122
123   if (sp->dirty)
124      softpipe_update_derived( sp );
125
126   softpipe_map_surfaces(sp);
127   softpipe_map_constant_buffers(sp);
128
129   /*
130    * Map vertex buffers
131    */
132   for (i = 0; i < sp->num_vertex_buffers; i++) {
133      void *buf
134         = pipe->winsys->buffer_map(pipe->winsys,
135                                    sp->vertex_buffer[i].buffer,
136                                    PIPE_BUFFER_USAGE_CPU_READ);
137      draw_set_mapped_vertex_buffer(draw, i, buf);
138   }
139   /* Map index buffer, if present */
140   if (indexBuffer) {
141      void *mapped_indexes
142         = pipe->winsys->buffer_map(pipe->winsys, indexBuffer,
143                                    PIPE_BUFFER_USAGE_CPU_READ);
144      draw_set_mapped_element_buffer(draw, indexSize, mapped_indexes);
145   }
146   else {
147      /* no index/element buffer */
148      draw_set_mapped_element_buffer(draw, 0, NULL);
149   }
150
151
152   /* draw! */
153   draw_arrays(draw, mode, start, count);
154
155   /*
156    * unmap vertex/index buffers - will cause draw module to flush
157    */
158   for (i = 0; i < sp->num_vertex_buffers; i++) {
159      draw_set_mapped_vertex_buffer(draw, i, NULL);
160      pipe->winsys->buffer_unmap(pipe->winsys, sp->vertex_buffer[i].buffer);
161   }
162   if (indexBuffer) {
163      draw_set_mapped_element_buffer(draw, 0, NULL);
164      pipe->winsys->buffer_unmap(pipe->winsys, indexBuffer);
165   }
166
167
168   /* Note: leave drawing surfaces mapped */
169   softpipe_unmap_constant_buffers(sp);
170
171   return TRUE;
172}
173
174
175void
176softpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
177{
178   struct softpipe_context *sp = softpipe_context(pipe);
179   draw_set_edgeflags(sp->draw, edgeflags);
180}
181
182