st_draw_feedback.c revision 58c5e782e351621bde2693fa945d0c90d140b855 
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#include "main/imports.h"
29#include "main/image.h"
30#include "main/macros.h"
31
32#include "vbo/vbo.h"
33
34#include "st_context.h"
35#include "st_atom.h"
36#include "st_cb_bufferobjects.h"
37#include "st_draw.h"
38#include "st_program.h"
39
40#include "pipe/p_context.h"
41#include "pipe/p_defines.h"
42#include "util/u_inlines.h"
43
44#include "draw/draw_private.h"
45#include "draw/draw_context.h"
46
47
48#if FEATURE_feedback || FEATURE_rastpos
49
50/**
51 * Set the (private) draw module's post-transformed vertex format when in
52 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
53 */
54static void
55set_feedback_vertex_format(struct gl_context *ctx)
56{
57#if 0
58   struct st_context *st = st_context(ctx);
59   struct vertex_info vinfo;
60   GLuint i;
61
62   memset(&vinfo, 0, sizeof(vinfo));
63
64   if (ctx->RenderMode == GL_SELECT) {
65      assert(ctx->RenderMode == GL_SELECT);
66      vinfo.num_attribs = 1;
67      vinfo.format[0] = FORMAT_4F;
68      vinfo.interp_mode[0] = INTERP_LINEAR;
69   }
70   else {
71      /* GL_FEEDBACK, or glRasterPos */
72      /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
73      vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
74      for (i = 0; i < vinfo.num_attribs; i++) {
75         vinfo.format[i] = FORMAT_4F;
76         vinfo.interp_mode[i] = INTERP_LINEAR;
77      }
78   }
79
80   draw_set_vertex_info(st->draw, &vinfo);
81#endif
82}
83
84
85/**
86 * Called by VBO to draw arrays when in selection or feedback mode and
87 * to implement glRasterPos.
88 * This is very much like the normal draw_vbo() function above.
89 * Look at code refactoring some day.
90 * Might move this into the failover module some day.
91 */
92void
93st_feedback_draw_vbo(struct gl_context *ctx,
94                     const struct gl_client_array **arrays,
95                     const struct _mesa_prim *prims,
96                     GLuint nr_prims,
97                     const struct _mesa_index_buffer *ib,
98		     GLboolean index_bounds_valid,
99                     GLuint min_index,
100                     GLuint max_index)
101{
102   struct st_context *st = st_context(ctx);
103   struct pipe_context *pipe = st->pipe;
104   struct draw_context *draw = st->draw;
105   const struct st_vertex_program *vp;
106   const struct pipe_shader_state *vs;
107   struct pipe_vertex_buffer vbuffers[PIPE_MAX_SHADER_INPUTS];
108   struct pipe_vertex_element velements[PIPE_MAX_ATTRIBS];
109   struct pipe_index_buffer ibuffer;
110   struct pipe_transfer *vb_transfer[PIPE_MAX_ATTRIBS];
111   struct pipe_transfer *ib_transfer = NULL;
112   GLuint attr, i;
113   const void *mapped_indices = NULL;
114
115   assert(draw);
116
117   st_validate_state(st);
118
119   if (!index_bounds_valid)
120      vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
121
122   /* must get these after state validation! */
123   vp = st->vp;
124   vs = &st->vp_variant->tgsi;
125
126   if (!st->vp_variant->draw_shader) {
127      st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
128   }
129
130   /*
131    * Set up the draw module's state.
132    *
133    * We'd like to do this less frequently, but the normal state-update
134    * code sends state updates to the pipe, not to our private draw module.
135    */
136   assert(draw);
137   draw_set_viewport_state(draw, &st->state.viewport);
138   draw_set_clip_state(draw, &st->state.clip);
139   draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
140   draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
141   set_feedback_vertex_format(ctx);
142
143   /* loop over TGSI shader inputs to determine vertex buffer
144    * and attribute info
145    */
146   for (attr = 0; attr < vp->num_inputs; attr++) {
147      const GLuint mesaAttr = vp->index_to_input[attr];
148      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
149      void *map;
150
151      if (bufobj && bufobj->Name) {
152         /* Attribute data is in a VBO.
153          * Recall that for VBOs, the gl_client_array->Ptr field is
154          * really an offset from the start of the VBO, not a pointer.
155          */
156         struct st_buffer_object *stobj = st_buffer_object(bufobj);
157         assert(stobj->buffer);
158
159         vbuffers[attr].buffer = NULL;
160         pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
161         vbuffers[attr].buffer_offset = pointer_to_offset(arrays[0]->Ptr);
162         velements[attr].src_offset = arrays[mesaAttr]->Ptr - arrays[0]->Ptr;
163      }
164      else {
165         /* attribute data is in user-space memory, not a VBO */
166         uint bytes = (arrays[mesaAttr]->Size
167                       * _mesa_sizeof_type(arrays[mesaAttr]->Type)
168                       * (max_index + 1));
169
170         /* wrap user data */
171         vbuffers[attr].buffer
172            = pipe_user_buffer_create(pipe->screen, (void *) arrays[mesaAttr]->Ptr,
173                                      bytes,
174				      PIPE_BIND_VERTEX_BUFFER);
175         vbuffers[attr].buffer_offset = 0;
176         velements[attr].src_offset = 0;
177      }
178
179      /* common-case setup */
180      vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
181      vbuffers[attr].max_index = max_index;
182      velements[attr].instance_divisor = 0;
183      velements[attr].vertex_buffer_index = attr;
184      velements[attr].src_format =
185         st_pipe_vertex_format(arrays[mesaAttr]->Type,
186                               arrays[mesaAttr]->Size,
187                               arrays[mesaAttr]->Format,
188                               arrays[mesaAttr]->Normalized);
189      assert(velements[attr].src_format);
190
191      /* tell draw about this attribute */
192#if 0
193      draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
194#endif
195
196      /* map the attrib buffer */
197      map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
198                            PIPE_TRANSFER_READ,
199			    &vb_transfer[attr]);
200      draw_set_mapped_vertex_buffer(draw, attr, map);
201   }
202
203   draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
204   draw_set_vertex_elements(draw, vp->num_inputs, velements);
205
206   memset(&ibuffer, 0, sizeof(ibuffer));
207   if (ib) {
208      struct gl_buffer_object *bufobj = ib->obj;
209
210      switch (ib->type) {
211      case GL_UNSIGNED_INT:
212         ibuffer.index_size = 4;
213         break;
214      case GL_UNSIGNED_SHORT:
215         ibuffer.index_size = 2;
216         break;
217      case GL_UNSIGNED_BYTE:
218         ibuffer.index_size = 1;
219         break;
220      default:
221         assert(0);
222	 return;
223      }
224
225      if (bufobj && bufobj->Name) {
226         struct st_buffer_object *stobj = st_buffer_object(bufobj);
227
228         pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
229         ibuffer.offset = pointer_to_offset(ib->ptr);
230
231         mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
232                                          PIPE_TRANSFER_READ, &ib_transfer);
233      }
234      else {
235         /* skip setting ibuffer.buffer as the draw module does not use it */
236         mapped_indices = ib->ptr;
237      }
238
239      draw_set_index_buffer(draw, &ibuffer);
240      draw_set_mapped_index_buffer(draw, mapped_indices);
241   }
242
243   /* set the constant buffer */
244   draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
245                                   st->state.constants[PIPE_SHADER_VERTEX].ptr,
246                                   st->state.constants[PIPE_SHADER_VERTEX].size);
247
248
249   /* draw here */
250   for (i = 0; i < nr_prims; i++) {
251      draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
252   }
253
254
255   /*
256    * unmap vertex/index buffers
257    */
258   for (i = 0; i < PIPE_MAX_ATTRIBS; i++) {
259      if (draw->pt.vertex_buffer[i].buffer) {
260         pipe_buffer_unmap(pipe, vb_transfer[i]);
261         pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
262         draw_set_mapped_vertex_buffer(draw, i, NULL);
263      }
264   }
265
266   if (ib) {
267      draw_set_mapped_index_buffer(draw, NULL);
268      draw_set_index_buffer(draw, NULL);
269
270      if (ib_transfer)
271         pipe_buffer_unmap(pipe, ib_transfer);
272      pipe_resource_reference(&ibuffer.buffer, NULL);
273   }
274}
275
276#endif /* FEATURE_feedback || FEATURE_rastpos */
277
278