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