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