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#include "main/mfeatures.h"
32
33#include "vbo/vbo.h"
34
35#include "st_context.h"
36#include "st_atom.h"
37#include "st_cb_bufferobjects.h"
38#include "st_draw.h"
39#include "st_program.h"
40
41#include "pipe/p_context.h"
42#include "pipe/p_defines.h"
43#include "util/u_inlines.h"
44
45#include "draw/draw_private.h"
46#include "draw/draw_context.h"
47
48
49#if FEATURE_feedback || FEATURE_rastpos
50
51/**
52 * Set the (private) draw module's post-transformed vertex format when in
53 * GL_SELECT or GL_FEEDBACK mode or for glRasterPos.
54 */
55static void
56set_feedback_vertex_format(struct gl_context *ctx)
57{
58#if 0
59   struct st_context *st = st_context(ctx);
60   struct vertex_info vinfo;
61   GLuint i;
62
63   memset(&vinfo, 0, sizeof(vinfo));
64
65   if (ctx->RenderMode == GL_SELECT) {
66      assert(ctx->RenderMode == GL_SELECT);
67      vinfo.num_attribs = 1;
68      vinfo.format[0] = FORMAT_4F;
69      vinfo.interp_mode[0] = INTERP_LINEAR;
70   }
71   else {
72      /* GL_FEEDBACK, or glRasterPos */
73      /* emit all attribs (pos, color, texcoord) as GLfloat[4] */
74      vinfo.num_attribs = st->state.vs->cso->state.num_outputs;
75      for (i = 0; i < vinfo.num_attribs; i++) {
76         vinfo.format[i] = FORMAT_4F;
77         vinfo.interp_mode[i] = INTERP_LINEAR;
78      }
79   }
80
81   draw_set_vertex_info(st->draw, &vinfo);
82#endif
83}
84
85
86/**
87 * Called by VBO to draw arrays when in selection or feedback mode and
88 * to implement glRasterPos.
89 * This is very much like the normal draw_vbo() function above.
90 * Look at code refactoring some day.
91 */
92void
93st_feedback_draw_vbo(struct gl_context *ctx,
94                     const struct _mesa_prim *prims,
95                     GLuint nr_prims,
96                     const struct _mesa_index_buffer *ib,
97		     GLboolean index_bounds_valid,
98                     GLuint min_index,
99                     GLuint max_index,
100                     struct gl_transform_feedback_object *tfb_vertcount)
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] = {NULL};
111   struct pipe_transfer *ib_transfer = NULL;
112   const struct gl_client_array **arrays = ctx->Array._DrawArrays;
113   GLuint attr, i;
114   const GLubyte *low_addr = NULL;
115   const void *mapped_indices = NULL;
116
117   assert(draw);
118
119   st_validate_state(st);
120
121   if (!index_bounds_valid)
122      vbo_get_minmax_indices(ctx, prims, ib, &min_index, &max_index, nr_prims);
123
124   /* must get these after state validation! */
125   vp = st->vp;
126   vs = &st->vp_variant->tgsi;
127
128   if (!st->vp_variant->draw_shader) {
129      st->vp_variant->draw_shader = draw_create_vertex_shader(draw, vs);
130   }
131
132   /*
133    * Set up the draw module's state.
134    *
135    * We'd like to do this less frequently, but the normal state-update
136    * code sends state updates to the pipe, not to our private draw module.
137    */
138   assert(draw);
139   draw_set_viewport_state(draw, &st->state.viewport);
140   draw_set_clip_state(draw, &st->state.clip);
141   draw_set_rasterizer_state(draw, &st->state.rasterizer, NULL);
142   draw_bind_vertex_shader(draw, st->vp_variant->draw_shader);
143   set_feedback_vertex_format(ctx);
144
145   /* Find the lowest address of the arrays we're drawing */
146   if (vp->num_inputs) {
147      low_addr = arrays[vp->index_to_input[0]]->Ptr;
148
149      for (attr = 1; attr < vp->num_inputs; attr++) {
150         const GLubyte *start = arrays[vp->index_to_input[attr]]->Ptr;
151         low_addr = MIN2(low_addr, start);
152      }
153   }
154
155   /* loop over TGSI shader inputs to determine vertex buffer
156    * and attribute info
157    */
158   for (attr = 0; attr < vp->num_inputs; attr++) {
159      const GLuint mesaAttr = vp->index_to_input[attr];
160      struct gl_buffer_object *bufobj = arrays[mesaAttr]->BufferObj;
161      void *map;
162
163      if (bufobj && bufobj->Name) {
164         /* Attribute data is in a VBO.
165          * Recall that for VBOs, the gl_client_array->Ptr field is
166          * really an offset from the start of the VBO, not a pointer.
167          */
168         struct st_buffer_object *stobj = st_buffer_object(bufobj);
169         assert(stobj->buffer);
170
171         vbuffers[attr].buffer = NULL;
172         vbuffers[attr].user_buffer = NULL;
173         pipe_resource_reference(&vbuffers[attr].buffer, stobj->buffer);
174         vbuffers[attr].buffer_offset = pointer_to_offset(low_addr);
175         velements[attr].src_offset = arrays[mesaAttr]->Ptr - low_addr;
176
177         /* map the attrib buffer */
178         map = pipe_buffer_map(pipe, vbuffers[attr].buffer,
179                               PIPE_TRANSFER_READ,
180                               &vb_transfer[attr]);
181         draw_set_mapped_vertex_buffer(draw, attr, map);
182      }
183      else {
184         vbuffers[attr].buffer = NULL;
185         vbuffers[attr].user_buffer = arrays[mesaAttr]->Ptr;
186         vbuffers[attr].buffer_offset = 0;
187         velements[attr].src_offset = 0;
188
189         draw_set_mapped_vertex_buffer(draw, attr, vbuffers[attr].user_buffer);
190      }
191
192      /* common-case setup */
193      vbuffers[attr].stride = arrays[mesaAttr]->StrideB; /* in bytes */
194      velements[attr].instance_divisor = 0;
195      velements[attr].vertex_buffer_index = attr;
196      velements[attr].src_format =
197         st_pipe_vertex_format(arrays[mesaAttr]->Type,
198                               arrays[mesaAttr]->Size,
199                               arrays[mesaAttr]->Format,
200                               arrays[mesaAttr]->Normalized,
201                               arrays[mesaAttr]->Integer);
202      assert(velements[attr].src_format);
203
204      /* tell draw about this attribute */
205#if 0
206      draw_set_vertex_buffer(draw, attr, &vbuffer[attr]);
207#endif
208   }
209
210   draw_set_vertex_buffers(draw, vp->num_inputs, vbuffers);
211   draw_set_vertex_elements(draw, vp->num_inputs, velements);
212
213   memset(&ibuffer, 0, sizeof(ibuffer));
214   if (ib) {
215      struct gl_buffer_object *bufobj = ib->obj;
216
217      ibuffer.index_size = vbo_sizeof_ib_type(ib->type);
218      if (ibuffer.index_size == 0)
219         goto out_unref_vertex;
220
221      if (bufobj && bufobj->Name) {
222         struct st_buffer_object *stobj = st_buffer_object(bufobj);
223
224         pipe_resource_reference(&ibuffer.buffer, stobj->buffer);
225         ibuffer.offset = pointer_to_offset(ib->ptr);
226
227         mapped_indices = pipe_buffer_map(pipe, stobj->buffer,
228                                          PIPE_TRANSFER_READ, &ib_transfer);
229      }
230      else {
231         /* skip setting ibuffer.buffer as the draw module does not use it */
232         mapped_indices = ib->ptr;
233      }
234
235      draw_set_indexes(draw,
236                       (ubyte *) mapped_indices + ibuffer.offset,
237                       ibuffer.index_size);
238   }
239
240   /* set the constant buffer */
241   draw_set_mapped_constant_buffer(st->draw, PIPE_SHADER_VERTEX, 0,
242                                   st->state.constants[PIPE_SHADER_VERTEX].ptr,
243                                   st->state.constants[PIPE_SHADER_VERTEX].size);
244
245
246   /* draw here */
247   for (i = 0; i < nr_prims; i++) {
248      draw_arrays(draw, prims[i].mode, prims[i].start, prims[i].count);
249   }
250
251
252   /*
253    * unmap vertex/index buffers
254    */
255   if (ib) {
256      draw_set_indexes(draw, NULL, 0);
257      if (ib_transfer)
258         pipe_buffer_unmap(pipe, ib_transfer);
259      pipe_resource_reference(&ibuffer.buffer, NULL);
260   }
261
262 out_unref_vertex:
263   for (attr = 0; attr < vp->num_inputs; attr++) {
264      if (vb_transfer[attr])
265         pipe_buffer_unmap(pipe, vb_transfer[attr]);
266      draw_set_mapped_vertex_buffer(draw, attr, NULL);
267      pipe_resource_reference(&vbuffers[attr].buffer, NULL);
268   }
269   draw_set_vertex_buffers(draw, 0, NULL);
270}
271
272#endif /* FEATURE_feedback || FEATURE_rastpos */
273
274