summaryrefslogtreecommitdiff
path: root/src/mesa/state_tracker/st_draw_feedback.c
blob: 26a5b3fcd637d102e566379add00ca18216729db (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
/**************************************************************************
 * 
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * 
 **************************************************************************/

#include "main/imports.h"
#include "main/image.h"
#include "main/macros.h"

#include "vbo/vbo.h"

#include "st_context.h"
#include "st_atom.h"
#include "st_cb_bufferobjects.h"
#include "st_draw.h"
#include "st_program.h"

#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "util/u_inlines.h"

#include "draw/draw_private.h"
#include "draw/draw_context.h"


#if FEATURE_feedback || FEATURE_drawpix

/**
 * Set the (private) draw module's post-transformed vertex format when in
 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
 */
static void
set_feedback_vertex_format(GLcontext *ctx)
{
#if 0
   struct st_context *st = ctx->st;
   struct vertex_info vinfo;
   GLuint i;

   memset(&vinfo, 0, sizeof(vinfo));

   if (ctx->RenderMode == GL_SELECT) {
      assert(ctx->RenderMode == GL_SELECT);
      vinfo.num_attribs = 1;
      vinfo.format[0] = FORMAT_4F;
      vinfo.interp_mode[0] = INTERP_LINEAR;
   }
   else {
      /* GL_FEEDBACK, or glRasterPos */
      /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
      vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
      for (i = 0; i < vinfo.num_attribs; i++) {
         vinfo.format[i] = FORMAT_4F;
         vinfo.interp_mode[i] = INTERP_LINEAR;
      }
   }

   draw_set_vertex_info(st->draw, &vinfo);
#endif
}


/**
 * Called by VBO to draw arrays when in selection or feedback mode and
 * to implement glRasterPos.
 * This is very much like the normal draw_vbo() function above.
 * Look at code refactoring some day.
 * Might move this into the failover module some day.
 */
void
st_feedback_draw_vbo(GLcontext *ctx,
                     const struct gl_client_array **arrays,
                     const struct _mesa_prim *prims,
                     GLuint nr_prims,
                     const struct _mesa_index_buffer *ib,
		     GLboolean index_bounds_valid,
                     GLuint min_index,
                     GLuint max_index)
{
   struct st_context *st = ctx->st;
   struct pipe_context *pipe = st->pipe;
   struct draw_context *draw = st->draw;
   const struct st_vertex_program *vp;
   const struct pipe_shader_state *vs;
   struct pipe_buffer *index_buffer_handle = 0;
   struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
   GLuint attr, i;
   ubyte *mapped_constants;

   assert(draw);

   st_validate_state(ctx->st);

   if (!index_bounds_valid)
      vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);

   /* must get these after state validation! */
   vp = ctx->st->vp;
   vs = &st->vp_varient->tgsi;

   if (!st->vp_varient->draw_shader) {
      st->vp_varient->draw_shader = draw_create_vertex_shader(draw, vs);
   }

   /*
    * Set up the draw module's state.
    *
    * We'd like to do this less frequently, but the normal state-update
    * code sends state updates to the pipe, not to our private draw module.
    */
   assert(draw);
   draw_set_viewport_state(draw, &st->state.viewport);
   draw_set_clip_state(draw, &st->state.clip);
   draw_set_rasterizer_state(draw, &st->state.rasterizer);
   draw_bind_vertex_shader(draw, st->vp_varient->draw_shader);
   set_feedback_vertex_format(ctx);

   /* loop over TGSI shader inputs to determine vertex buffer
    * and attribute info
    */
   for (attr = 0; attr < vp->num_inputs; attr++) {
      const GLuint mesaAttr = vp->index_to_input[attr];
      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
      void *map;

      if (bufobj && bufobj->Name) {
         /* Attribute data is in a VBO.
          * Recall that for VBOs, the gl_client_array->Ptr field is
          * really an offset from the start of the VBO, not a pointer.
          */
         struct st_buffer_object *stobj = st_buffer_object(bufobj);
         assert(stobj->buffer);

         vbuffers[attr].buffer = NULL;
         pipe_buffer_reference(&vbuffers[attr].buffer, stobj->buffer);
         vbuffers[attr].buffer_offset = pointer_to_offset(arrays[0]->Ptr);
         velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
      }
      else {
         /* attribute data is in user-space memory, not a VBO */
         uint bytes = (arrays[mesaAttr]->Size
                       * _mesa_sizeof_type(arrays[mesaAttr]->Type)
                       * (max_index + 1));

         /* wrap user data */
         vbuffers[attr].buffer
            = pipe_user_buffer_create(pipe->screen, (void *) arrays[mesaAttr]->Ptr,
                                      bytes);
         vbuffers[attr].buffer_offset = 0;
         velements[attr].src_offset = 0;
      }

      /* common-case setup */
      vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
      vbuffers[attr].max_index = max_index;
      velements[attr].instance_divisor = 0;
      velements[attr].vertex_buffer_index = attr;
      velements[attr].src_format = 
         st_pipe_vertex_format(arrays[mesaAttr]->Type,
                               arrays[mesaAttr]->Size,
                               arrays[mesaAttr]->Format,
                               arrays[mesaAttr]->Normalized);
      assert(velements[attr].src_format);

      /* tell draw about this attribute */
#if 0
      draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
#endif

      /* map the attrib buffer */
      map = pipe_buffer_map(pipe->screen, vbuffers[attr].buffer,
                            PIPE_BUFFER_USAGE_CPU_READ);
      draw_set_mapped_vertex_buffer(draw, attr, map);
   }

   draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
   draw_set_vertex_elements(draw, vp->num_inputs, velements);

   if (ib) {
      struct gl_buffer_object *bufobj = ib->obj;
      unsigned indexSize;
      void *map;

      switch (ib->type) {
      case GL_UNSIGNED_INT:
         indexSize = 4;
         break;
      case GL_UNSIGNED_SHORT:
         indexSize = 2;
         break;
      default:
         assert(0);
	 return;
      }

      if (bufobj && bufobj->Name) {
         struct st_buffer_object *stobj = st_buffer_object(bufobj);

         index_buffer_handle = stobj->buffer;

         map = pipe_buffer_map(pipe->screen, index_buffer_handle,
                               PIPE_BUFFER_USAGE_CPU_READ);

         draw_set_mapped_element_buffer(draw, indexSize, map);
      }
      else {
         draw_set_mapped_element_buffer(draw, indexSize, (void *) ib->ptr);
      }
   }
   else {
      /* no index/element buffer */
      draw_set_mapped_element_buffer(draw, 0, NULL);
   }


   /* map constant buffers */
   mapped_constants = pipe_buffer_map(pipe->screen,
                                      st->state.constants[PIPE_SHADER_VERTEX],
                                      PIPE_BUFFER_USAGE_CPU_READ);
   draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
                                   mapped_constants,
                                   st->state.constants[PIPE_SHADER_VERTEX]->size);


   /* draw here */
   for (i = 0; i < nr_prims; i++) {
      draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
   }


   /* unmap constant buffers */
   pipe_buffer_unmap(pipe->screen, st->state.constants[PIPE_SHADER_VERTEX]);

   /*
    * unmap vertex/index buffers
    */
   for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
      if (draw->pt.vertex_buffer[i].buffer) {
         pipe_buffer_unmap(pipe->screen, draw->pt.vertex_buffer[i].buffer);
         pipe_buffer_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
         draw_set_mapped_vertex_buffer(draw, i, NULL);
      }
   }
   if (index_buffer_handle) {
      pipe_buffer_unmap(pipe->screen, index_buffer_handle);
      draw_set_mapped_element_buffer(draw, 0, NULL);
   }
}

#endif /* FEATURE_feedback || FEATURE_drawpix */