src/mesa/state_tracker/st_context.c

   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 "main/extensions.h"
  31 #include "main/matrix.h"
  32 #include "main/buffers.h"
  33 #include "main/scissor.h"
  34 #include "main/viewport.h"
  35 #include "vbo/vbo.h"
  36 #include "shader/shader_api.h"
  37 #include "glapi/glapi.h"
  38 #include "st_public.h"
  39 #include "st_debug.h"
  40 #include "st_context.h"
  41 #include "st_cb_accum.h"
  42 #include "st_cb_bitmap.h"
  43 #include "st_cb_blit.h"
  44 #include "st_cb_bufferobjects.h"
  45 #include "st_cb_clear.h"
  46 #if FEATURE_drawpix
  47 #include "st_cb_drawpixels.h"
  48 #include "st_cb_rasterpos.h"
  49 #endif
  50 #ifdef FEATURE_OES_draw_texture
  51 #include "st_cb_drawtex.h"
  52 #endif
  53 #include "st_cb_fbo.h"
  54 #include "st_cb_get.h"
  55 #if FEATURE_feedback
  56 #include "st_cb_feedback.h"
  57 #endif
  58 #include "st_cb_program.h"
  59 #include "st_cb_queryobj.h"
  60 #include "st_cb_readpixels.h"
  61 #include "st_cb_texture.h"
  62 #include "st_cb_flush.h"
  63 #include "st_cb_strings.h"
  64 #include "st_cb_viewport.h"
  65 #include "st_atom.h"
  66 #include "st_draw.h"
  67 #include "st_extensions.h"
  68 #include "st_gen_mipmap.h"
  69 #include "st_program.h"
  70 #include "pipe/p_context.h"
  71 #include "draw/draw_context.h"
  72 #include "cso_cache/cso_cache.h"
  73 #include "cso_cache/cso_context.h"
  74
  75
  76 /**
  77  * Called via ctx->Driver.UpdateState()
  78  */
  79 void st_invalidate_state(GLcontext * ctx, GLuint new_state)
  80 {
  81    struct st_context *st = st_context(ctx);
  82
  83    st->dirty.mesa |= new_state;
  84    st->dirty.st |= ST_NEW_MESA;
  85
  86    /* This is the only core Mesa module we depend upon.
  87     * No longer use swrast, swsetup, tnl.
  88     */
  89    _vbo_InvalidateState(ctx, new_state);
  90 }
  91
  92
  93 /**
  94  * Check for multisample env var override.
  95  */
  96 int
  97 st_get_msaa(void)
  98 {
  99    const char *msaa = _mesa_getenv("__GL_FSAA_MODE");
 100    if (msaa)
 101       return atoi(msaa);
 102    return 0;
 103 }
 104
 105
 106 static struct st_context *
 107 st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
 108 {
 109    uint i;
 110    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 111
 112    ctx->st = st;
 113
 114    st->ctx = ctx;
 115    st->pipe = pipe;
 116
 117    /* XXX: this is one-off, per-screen init: */
 118    st_debug_init();
 119
 120    /* state tracker needs the VBO module */
 121    _vbo_CreateContext(ctx);
 122
 123 #if FEATURE_feedback || FEATURE_drawpix
 124    st->draw = draw_create(); /* for selection/feedback */
 125
 126    /* Disable draw options that might convert points/lines to tris, etc.
 127     * as that would foul-up feedback/selection mode.
 128     */
 129    draw_wide_line_threshold(st->draw, 1000.0f);
 130    draw_wide_point_threshold(st->draw, 1000.0f);
 131    draw_enable_line_stipple(st->draw, FALSE);
 132    draw_enable_point_sprites(st->draw, FALSE);
 133 #endif
 134
 135    st->dirty.mesa = ~0;
 136    st->dirty.st = ~0;
 137
 138    st->cso_context = cso_create_context(pipe);
 139
 140    st_init_atoms( st );
 141    st_init_bitmap(st);
 142    st_init_clear(st);
 143    st_init_draw( st );
 144    st_init_generate_mipmap(st);
 145    st_init_blit(st);
 146
 147    for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 148       st->state.sampler_list[i] = &st->state.samplers[i];
 149
 150    /* we want all vertex data to be placed in buffer objects */
 151    vbo_use_buffer_objects(ctx);
 152
 153    /* Need these flags:
 154     */
 155    st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 156
 157    st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 158
 159    st->pixel_xfer.cache = _mesa_new_program_cache();
 160
 161    st->force_msaa = st_get_msaa();
 162
 163    /* GL limits and extensions */
 164    st_init_limits(st);
 165    st_init_extensions(st);
 166
 167    return st;
 168 }
 169
 170
 171 struct st_context *st_create_context(struct pipe_context *pipe,
 172                                      const __GLcontextModes *visual,
 173                                      struct st_context *share)
 174 {
 175    GLcontext *ctx;
 176    GLcontext *shareCtx = share ? share->ctx : NULL;
 177    struct dd_function_table funcs;
 178
 179    memset(&funcs, 0, sizeof(funcs));
 180    st_init_driver_functions(&funcs);
 181
 182    ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL);
 183
 184    /* XXX: need a capability bit in gallium to query if the pipe
 185     * driver prefers DP4 or MUL/MAD for vertex transformation.
 186     */
 187    if (debug_get_bool_option("MESA_MVP_DP4", FALSE))
 188       _mesa_set_mvp_with_dp4( ctx, GL_TRUE );
 189
 190    return st_create_context_priv(ctx, pipe);
 191 }
 192
 193
 194 static void st_destroy_context_priv( struct st_context *st )
 195 {
 196    uint i;
 197
 198 #if FEATURE_feedback || FEATURE_drawpix
 199    draw_destroy(st->draw);
 200 #endif
 201    st_destroy_atoms( st );
 202    st_destroy_draw( st );
 203    st_destroy_generate_mipmap(st);
 204 #if FEATURE_EXT_framebuffer_blit
 205    st_destroy_blit(st);
 206 #endif
 207    st_destroy_clear(st);
 208 #if FEATURE_drawpix
 209    st_destroy_bitmap(st);
 210    st_destroy_drawpix(st);
 211 #endif
 212 #ifdef FEATURE_OES_draw_texture
 213    st_destroy_drawtex(st);
 214 #endif
 215
 216    for (i = 0; i < Elements(st->state.sampler_texture); i++) {
 217       pipe_texture_reference(&st->state.sampler_texture[i], NULL);
 218    }
 219
 220    for (i = 0; i < Elements(st->state.constants); i++) {
 221       if (st->state.constants[i].buffer) {
 222          pipe_buffer_reference(&st->state.constants[i].buffer, NULL);
 223       }
 224    }
 225
 226    if (st->default_texture) {
 227       st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
 228       st->default_texture = NULL;
 229    }
 230
 231    _mesa_free( st );
 232 }
 233
 234
 235 void st_destroy_context( struct st_context *st )
 236 {
 237    struct pipe_context *pipe = st->pipe;
 238    struct cso_context *cso = st->cso_context;
 239    GLcontext *ctx = st->ctx;
 240    GLuint i;
 241
 242    /* need to unbind and destroy CSO objects before anything else */
 243    cso_release_all(st->cso_context);
 244
 245    st_reference_fragprog(st, &st->fp, NULL);
 246    st_reference_vertprog(st, &st->vp, NULL);
 247
 248    /* release framebuffer surfaces */
 249    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 250       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 251    }
 252    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 253
 254    _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);
 255
 256    _vbo_DestroyContext(st->ctx);
 257
 258    _mesa_free_context_data(ctx);
 259
 260    st_destroy_context_priv(st);
 261
 262    cso_destroy_context(cso);
 263
 264    pipe->destroy( pipe );
 265
 266    _mesa_free(ctx);
 267 }
 268
 269
 270 GLboolean
 271 st_make_current(struct st_context *st,
 272                 struct st_framebuffer *draw,
 273                 struct st_framebuffer *read)
 274 {
 275    /* Call this periodically to detect when the user has begun using
 276     * GL rendering from multiple threads.
 277     */
 278    _glapi_check_multithread();
 279
 280    if (st) {
 281       if (!_mesa_make_current(st->ctx, &draw->Base, &read->Base))
 282          return GL_FALSE;
 283
 284       _mesa_check_init_viewport(st->ctx, draw->InitWidth, draw->InitHeight);
 285
 286       return GL_TRUE;
 287    }
 288    else {
 289       return _mesa_make_current(NULL, NULL, NULL);
 290    }
 291 }
 292
 293 struct st_context *st_get_current(void)
 294 {
 295    GET_CURRENT_CONTEXT(ctx);
 296
 297    return (ctx == NULL) ? NULL : ctx->st;
 298 }
 299
 300 void st_copy_context_state(struct st_context *dst,
 301                            struct st_context *src,
 302                            uint mask)
 303 {
 304    _mesa_copy_context(dst->ctx, src->ctx, mask);
 305 }
 306
 307
 308
 309 st_proc st_get_proc_address(const char *procname)
 310 {
 311    return (st_proc) _glapi_get_proc_address(procname);
 312 }
 313
 314
 315
 316 void st_init_driver_functions(struct dd_function_table *functions)
 317 {
 318    _mesa_init_glsl_driver_functions(functions);
 319
 320 #if FEATURE_accum
 321    st_init_accum_functions(functions);
 322 #endif
 323 #if FEATURE_EXT_framebuffer_blit
 324    st_init_blit_functions(functions);
 325 #endif
 326    st_init_bufferobject_functions(functions);
 327    st_init_clear_functions(functions);
 328 #if FEATURE_drawpix
 329    st_init_bitmap_functions(functions);
 330    st_init_drawpixels_functions(functions);
 331    st_init_rasterpos_functions(functions);
 332 #endif
 333    st_init_fbo_functions(functions);
 334    st_init_get_functions(functions);
 335 #if FEATURE_feedback
 336    st_init_feedback_functions(functions);
 337 #endif
 338    st_init_program_functions(functions);
 339 #if FEATURE_queryobj
 340    st_init_query_functions(functions);
 341 #endif
 342    st_init_readpixels_functions(functions);
 343    st_init_texture_functions(functions);
 344    st_init_flush_functions(functions);
 345    st_init_string_functions(functions);
 346    st_init_viewport_functions(functions);
 347
 348    functions->UpdateState = st_invalidate_state;
 349 }