lp_setup.c revision 931210424bc46b2c13919f0ac3e0ef781eff207e 
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/**
29 * Tiling engine.
30 *
31 * Builds per-tile display lists and executes them on calls to
32 * lp_setup_flush().
33 */
34
35#include "lp_setup.h"
36#include "util/u_math.h"
37#include "util/u_memory.h"
38
39void lp_setup_new_cmd_block( struct cmd_block_list *list )
40{
41   struct cmd_block *block = MALLOC_STRUCT(cmd_block);
42   list->tail->next = block;
43   list->tail = block;
44   block->next = NULL;
45   block->count = 0;
46}
47
48void lp_setup_new_data_block( struct data_block_list *list )
49{
50   struct data_block *block = MALLOC_STRUCT(data_block);
51   list->tail->next = block;
52   list->tail = block;
53   block->next = NULL;
54   block->used = 0;
55}
56
57static void reset_context( struct setup_context *setup )
58{
59   for (i = 0; i < setup->tiles_x; i++) {
60      for (j = 0; j < setup->tiles_y; j++) {
61         struct cmd_block_list *list = scene->tile[i][j];
62         struct cmd_block *block;
63         struct cmd_block *tmp;
64
65         for (block = list->first; block != list->tail; block = tmp) {
66            tmp = block->next;
67            FREE(block);
68         }
69
70         list->first = list->tail;
71      }
72   }
73
74   {
75      struct data_block_list *list = &scene->data;
76      struct data_block *block, *tmp;
77
78      for (block = list->first; block != list->tail; block = tmp) {
79         tmp = block->next;
80         FREE(block);
81      }
82
83      list->first = list->tail;
84   }
85}
86
87
88
89
90/* Add a command to all active bins.
91 */
92static void bin_everywhere( struct setup_context *setup,
93                            bin_cmd cmd,
94                            const union lp_rast_cmd_arg *arg )
95{
96   unsigned i, j;
97   for (i = 0; i < setup->tiles_x; i++)
98      for (j = 0; j < setup->tiles_y; j++)
99         bin_cmd( setup, &setup->tile[i][j], cmd, arg );
100}
101
102
103static void
104rasterize_bins( struct setup_context *setup,
105                struct lp_rast *rast,
106                boolean write_depth )
107{
108   lp_rast_bind_color( rast,
109                       scene->fb.color,
110                       TRUE );                    /* WRITE */
111
112   lp_rast_bind_depth( rast,
113                       scene->fb.depth,
114                       write_depth );             /* WRITE */
115
116   for (i = 0; i < scene->tiles_x; i++) {
117      for (j = 0; j < scene->tiles_y; j++) {
118
119         lp_rast_start_tile( rast,
120                             i * TILESIZE,
121                             j * TILESIZE );
122
123         for (block = scene->tile[i][j].first; block; block = block->next) {
124            for (k = 0; k < block->nr_cmds; k++) {
125               block->cmd[k].func( rast, block->cmd[k].arg );
126            }
127         }
128
129         lp_rast_finish_tile( rast );
130      }
131   }
132
133   lp_setup_free_data( setup );
134}
135
136
137
138static void
139begin_binning( struct setup_context *setup )
140{
141   if (setup->fb.color) {
142      if (setup->fb.clear_color)
143         bin_everywhere( setup,
144                         lp_rast_clear_color,
145                         &setup->clear_data );
146      else
147         bin_everywhere( setup,
148                         lp_rast_load_color,
149                         NULL );
150   }
151
152   if (setup->fb.zstencil) {
153      if (setup->fb.clear_zstencil)
154         bin_everywhere( setup,
155                         lp_rast_clear_zstencil,
156                         &setup->clear_data );
157      else
158         bin_everywhere( setup,
159                         lp_rast_load_zstencil,
160                         NULL );
161   }
162}
163
164
165/* This basically bins and then flushes any outstanding full-screen
166 * clears.
167 *
168 * TODO: fast path for fullscreen clears and no triangles.
169 */
170static void
171execute_clears( struct setup_context *setup )
172{
173   begin_binning( setup );
174   rasterize_bins( setup );
175}
176
177
178static void
179set_state( struct setup_context *setup,
180           unsigned new_state )
181{
182   unsigned old_state = setup->state;
183
184   if (old_state == new_state)
185      return;
186
187   switch (new_state) {
188   case SETUP_ACTIVE:
189      if (old_state == SETUP_FLUSHED)
190         setup_begin_binning( setup );
191      break;
192
193   case SETUP_CLEARED:
194      if (old_state == SETUP_ACTIVE) {
195         assert(0);
196         return;
197      }
198      break;
199
200   case SETUP_FLUSHED:
201      if (old_state == SETUP_CLEAR)
202         execute_clears( setup );
203      else
204         rasterize_bins( setup );
205      break;
206   }
207
208   setup->state = new_state;
209}
210
211
212void
213lp_setup_flush( struct setup_context *setup,
214                unsigned flags )
215{
216   set_state( setup, SETUP_FLUSHED );
217}
218
219
220void
221lp_setup_bind_framebuffer( struct setup_context *setup,
222                           struct pipe_surface *color,
223                           struct pipe_surface *zstencil )
224{
225   unsigned width, height;
226
227   set_state( setup, SETUP_FLUSHED );
228
229   pipe_surface_reference( &setup->fb.color, color );
230   pipe_surface_reference( &setup->fb.zstencil, zstencil );
231
232   width = MAX2( color->width, zstencil->width );
233   height = MAX2( color->height, zstencil->height );
234
235   setup->tiles_x = align( width, TILESIZE ) / TILESIZE;
236   setup->tiles_y = align( height, TILESIZE ) / TILESIZE;
237}
238
239void
240lp_setup_clear( struct setup_context *setup,
241                const float *clear_color,
242                double clear_depth,
243                unsigned clear_stencil,
244                unsigned flags )
245{
246   if (setup->state == SETUP_ACTIVE) {
247      struct lp_rast_clear_info *clear_info;
248      unsigned i, j;
249
250      clear_info = alloc_clear_info( setup );
251
252      if (flags & PIPE_CLEAR_COLOR) {
253         pack_color( setup,
254                     clear_info->color,
255                     clear_color );
256         bin_everywhere(setup, lp_rast_clear_color, clear_info );
257      }
258
259      if (flags & PIPE_CLEAR_DEPTH_STENCIL) {
260         pack_depth_stencil( setup,
261                             clear_info->depth,
262                             clear_depth,
263                             clear_stencil );
264
265         bin_everywhere(setup, lp_rast_clear_zstencil, clear_info );
266      }
267   }
268   else {
269      set_state( setup, SETUP_CLEARED );
270      setup->clear.flags |= flags;
271
272      if (flags & PIPE_CLEAR_COLOR) {
273         memcpy(setup->clear.color, color, sizeof setup->clear.color);
274      }
275
276      if (flags & PIPE_CLEAR_DEPTH_STENCIL) {
277         setup->clear.depth = clear_depth;
278         setup->clear.stencil = clear_stencil;
279      }
280   }
281}
282
283
284void
285lp_setup_set_fs_inputs( struct setup_context *setup,
286                        const enum lp_interp *interp,
287                        unsigned nr )
288{
289   memcpy( setup->interp, interp, nr * sizeof interp[0] );
290}
291
292
293static void
294first_triangle( struct setup_context *setup,
295                const float (*v0)[4],
296                const float (*v1)[4],
297                const float (*v2)[4])
298{
299   set_state( setup, STATE_ACTIVE );
300   setup_choose_triangle( setup, v0, v1, v2 );
301}
302
303
304
305/* Stubs for lines & points for now:
306 */
307void
308lp_setup_point(struct setup_context *setup,
309		     const float (*v0)[4])
310{
311   setup->point( setup, v0 );
312}
313
314void
315lp_setup_line(struct setup_context *setup,
316		    const float (*v0)[4],
317		    const float (*v1)[4])
318{
319   setup->line( setup, v0, v1 );
320}
321
322void
323lp_setup_triangle(struct setup_context *setup,
324                  const float (*v0)[4],
325                  const float (*v1)[4],
326                  const float (*v2)[4])
327{
328   setup->triangle( setup, v0, v1, v2 );
329}
330
331
332void setup_destroy_context( struct setup_context *setup )
333{
334   lp_rast_destroy( setup->rast );
335   FREE( setup );
336}
337
338
339/**
340 * Create a new primitive tiling engine.  Currently also creates a
341 * rasterizer to use with it.
342 */
343struct setup_context *setup_create_context( void )
344{
345   struct setup_context *setup = CALLOC_STRUCT(setup_context);
346
347   setup->rast = lp_rast_create( void );
348   if (!setup->rast)
349      goto fail;
350
351   for (i = 0; i < TILES_X; i++)
352      for (j = 0; j < TILES_Y; j++)
353         setup->tile[i][j].first =
354            setup->tile[i][j].next = CALLOC_STRUCT(cmd_block);
355
356   return setup;
357
358fail:
359   FREE(setup);
360   return NULL;
361}
362
363