st_context.c revision 4a49301e 
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/context.h"
30#include "vbo/vbo.h"
31#include "shader/shader_api.h"
32#include "glapi/glapi.h"
33#include "st_public.h"
34#include "st_debug.h"
35#include "st_context.h"
36#include "st_cb_accum.h"
37#include "st_cb_bitmap.h"
38#include "st_cb_blit.h"
39#include "st_cb_bufferobjects.h"
40#include "st_cb_clear.h"
41#if FEATURE_drawpix
42#include "st_cb_drawpixels.h"
43#include "st_cb_rasterpos.h"
44#endif
45#ifdef FEATURE_OES_draw_texture
46#include "st_cb_drawtex.h"
47#endif
48#include "st_cb_fbo.h"
49#if FEATURE_feedback
50#include "st_cb_feedback.h"
51#endif
52#include "st_cb_program.h"
53#include "st_cb_queryobj.h"
54#include "st_cb_readpixels.h"
55#include "st_cb_texture.h"
56#include "st_cb_flush.h"
57#include "st_cb_strings.h"
58#include "st_cb_viewport.h"
59#include "st_atom.h"
60#include "st_draw.h"
61#include "st_extensions.h"
62#include "st_gen_mipmap.h"
63#include "st_program.h"
64#include "pipe/p_context.h"
65#include "draw/draw_context.h"
66#include "cso_cache/cso_context.h"
67
68
69/**
70 * Called via ctx->Driver.UpdateState()
71 */
72void st_invalidate_state(GLcontext * ctx, GLuint new_state)
73{
74   struct st_context *st = st_context(ctx);
75
76   st->dirty.mesa |= new_state;
77   st->dirty.st |= ST_NEW_MESA;
78
79   /* This is the only core Mesa module we depend upon.
80    * No longer use swrast, swsetup, tnl.
81    */
82   _vbo_InvalidateState(ctx, new_state);
83}
84
85
86/**
87 * Check for multisample env var override.
88 */
89int
90st_get_msaa(void)
91{
92   const char *msaa = _mesa_getenv("__GL_FSAA_MODE");
93   if (msaa)
94      return atoi(msaa);
95   return 0;
96}
97
98
99static struct st_context *
100st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
101{
102   uint i;
103   struct st_context *st = ST_CALLOC_STRUCT( st_context );
104
105   ctx->st = st;
106
107   st->ctx = ctx;
108   st->pipe = pipe;
109
110   /* XXX: this is one-off, per-screen init: */
111   st_debug_init();
112
113   /* state tracker needs the VBO module */
114   _vbo_CreateContext(ctx);
115
116#if FEATURE_feedback || FEATURE_drawpix
117   st->draw = draw_create(); /* for selection/feedback */
118
119   /* Disable draw options that might convert points/lines to tris, etc.
120    * as that would foul-up feedback/selection mode.
121    */
122   draw_wide_line_threshold(st->draw, 1000.0f);
123   draw_wide_point_threshold(st->draw, 1000.0f);
124   draw_enable_line_stipple(st->draw, FALSE);
125   draw_enable_point_sprites(st->draw, FALSE);
126#endif
127
128   st->dirty.mesa = ~0;
129   st->dirty.st = ~0;
130
131   st->cso_context = cso_create_context(pipe);
132
133   st_init_atoms( st );
134   st_init_bitmap(st);
135   st_init_clear(st);
136   st_init_draw( st );
137   st_init_generate_mipmap(st);
138   st_init_blit(st);
139
140   for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
141      st->state.sampler_list[i] = &st->state.samplers[i];
142
143   /* we want all vertex data to be placed in buffer objects */
144   vbo_use_buffer_objects(ctx);
145
146   /* Need these flags:
147    */
148   st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
149
150   st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
151
152   st->pixel_xfer.cache = _mesa_new_program_cache();
153
154   st->force_msaa = st_get_msaa();
155
156   /* GL limits and extensions */
157   st_init_limits(st);
158   st_init_extensions(st);
159
160   return st;
161}
162
163
164struct st_context *st_create_context(struct pipe_context *pipe,
165                                     const __GLcontextModes *visual,
166                                     struct st_context *share)
167{
168   GLcontext *ctx;
169   GLcontext *shareCtx = share ? share->ctx : NULL;
170   struct dd_function_table funcs;
171
172   memset(&funcs, 0, sizeof(funcs));
173   st_init_driver_functions(&funcs);
174
175   ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL);
176
177   /* XXX: need a capability bit in gallium to query if the pipe
178    * driver prefers DP4 or MUL/MAD for vertex transformation.
179    */
180   if (debug_get_bool_option("MESA_MVP_DP4", FALSE))
181      _mesa_set_mvp_with_dp4( ctx, GL_TRUE );
182
183   return st_create_context_priv(ctx, pipe);
184}
185
186
187static void st_destroy_context_priv( struct st_context *st )
188{
189   uint i;
190
191#if FEATURE_feedback || FEATURE_drawpix
192   draw_destroy(st->draw);
193#endif
194   st_destroy_atoms( st );
195   st_destroy_draw( st );
196   st_destroy_generate_mipmap(st);
197#if FEATURE_EXT_framebuffer_blit
198   st_destroy_blit(st);
199#endif
200   st_destroy_clear(st);
201#if FEATURE_drawpix
202   st_destroy_bitmap(st);
203   st_destroy_drawpix(st);
204#endif
205#ifdef FEATURE_OES_draw_texture
206   st_destroy_drawtex(st);
207#endif
208
209   for (i = 0; i < Elements(st->state.sampler_texture); i++) {
210      pipe_texture_reference(&st->state.sampler_texture[i], NULL);
211   }
212
213   for (i = 0; i < Elements(st->state.constants); i++) {
214      if (st->state.constants[i].buffer) {
215         pipe_buffer_reference(&st->state.constants[i].buffer, NULL);
216      }
217   }
218
219   if (st->default_texture) {
220      st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
221      st->default_texture = NULL;
222   }
223
224   _mesa_free( st );
225}
226
227
228void st_destroy_context( struct st_context *st )
229{
230   struct pipe_context *pipe = st->pipe;
231   struct cso_context *cso = st->cso_context;
232   GLcontext *ctx = st->ctx;
233   GLuint i;
234
235   /* need to unbind and destroy CSO objects before anything else */
236   cso_release_all(st->cso_context);
237
238   st_reference_fragprog(st, &st->fp, NULL);
239   st_reference_vertprog(st, &st->vp, NULL);
240
241   /* release framebuffer surfaces */
242   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
243      pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
244   }
245   pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
246
247   _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);
248
249   _vbo_DestroyContext(st->ctx);
250
251   _mesa_free_context_data(ctx);
252
253   st_destroy_context_priv(st);
254
255   cso_destroy_context(cso);
256
257   pipe->destroy( pipe );
258
259   _mesa_free(ctx);
260}
261
262
263GLboolean
264st_make_current(struct st_context *st,
265                struct st_framebuffer *draw,
266                struct st_framebuffer *read)
267{
268   /* Call this periodically to detect when the user has begun using
269    * GL rendering from multiple threads.
270    */
271   _glapi_check_multithread();
272
273   if (st) {
274      if (!_mesa_make_current(st->ctx, &draw->Base, &read->Base))
275         return GL_FALSE;
276
277      _mesa_check_init_viewport(st->ctx, draw->InitWidth, draw->InitHeight);
278
279      return GL_TRUE;
280   }
281   else {
282      return _mesa_make_current(NULL, NULL, NULL);
283   }
284}
285
286struct st_context *st_get_current(void)
287{
288   GET_CURRENT_CONTEXT(ctx);
289
290   return (ctx == NULL) ? NULL : ctx->st;
291}
292
293void st_copy_context_state(struct st_context *dst,
294                           struct st_context *src,
295                           uint mask)
296{
297   _mesa_copy_context(dst->ctx, src->ctx, mask);
298}
299
300
301
302st_proc st_get_proc_address(const char *procname)
303{
304   return (st_proc) _glapi_get_proc_address(procname);
305}
306
307
308
309void st_init_driver_functions(struct dd_function_table *functions)
310{
311   _mesa_init_glsl_driver_functions(functions);
312
313#if FEATURE_accum
314   st_init_accum_functions(functions);
315#endif
316#if FEATURE_EXT_framebuffer_blit
317   st_init_blit_functions(functions);
318#endif
319   st_init_bufferobject_functions(functions);
320   st_init_clear_functions(functions);
321#if FEATURE_drawpix
322   st_init_bitmap_functions(functions);
323   st_init_drawpixels_functions(functions);
324   st_init_rasterpos_functions(functions);
325#endif
326   st_init_fbo_functions(functions);
327#if FEATURE_feedback
328   st_init_feedback_functions(functions);
329#endif
330   st_init_program_functions(functions);
331#if FEATURE_queryobj
332   st_init_query_functions(functions);
333#endif
334   st_init_readpixels_functions(functions);
335   st_init_texture_functions(functions);
336   st_init_flush_functions(functions);
337   st_init_string_functions(functions);
338   st_init_viewport_functions(functions);
339
340   functions->UpdateState = st_invalidate_state;
341}
342