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    for (i = 0; i < 3; i++) {
 146       memset(&st->velems_util_draw[i], 0, sizeof(struct pipe_vertex_element));
 147       st->velems_util_draw[i].src_offset = i * 4 * sizeof(float);
 148       st->velems_util_draw[i].instance_divisor = 0;
 149       st->velems_util_draw[i].vertex_buffer_index = 0;
 150       st->velems_util_draw[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 151    }
 152
 153    /* we want all vertex data to be placed in buffer objects */
 154    vbo_use_buffer_objects(ctx);
 155
 156    /* Need these flags:
 157     */
 158    st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 159
 160    st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 161
 162    st->pixel_xfer.cache = _mesa_new_program_cache();
 163
 164    st->force_msaa = st_get_msaa();
 165
 166    /* GL limits and extensions */
 167    st_init_limits(st);
 168    st_init_extensions(st);
 169
 170    return st;
 171 }
 172
 173
 174 struct st_context *st_create_context(struct pipe_context *pipe,
 175                                      const __GLcontextModes *visual,
 176                                      struct st_context *share)
 177 {
 178    GLcontext *ctx;
 179    GLcontext *shareCtx = share ? share->ctx : NULL;
 180    struct dd_function_table funcs;
 181
 182    memset(&funcs, 0, sizeof(funcs));
 183    st_init_driver_functions(&funcs);
 184
 185    ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL);
 186
 187    /* XXX: need a capability bit in gallium to query if the pipe
 188     * driver prefers DP4 or MUL/MAD for vertex transformation.
 189     */
 190    if (debug_get_bool_option("MESA_MVP_DP4", FALSE))
 191       _mesa_set_mvp_with_dp4( ctx, GL_TRUE );
 192
 193    return st_create_context_priv(ctx, pipe);
 194 }
 195
 196
 197 static void st_destroy_context_priv( struct st_context *st )
 198 {
 199    uint i;
 200
 201 #if FEATURE_feedback || FEATURE_drawpix
 202    draw_destroy(st->draw);
 203 #endif
 204    st_destroy_atoms( st );
 205    st_destroy_draw( st );
 206    st_destroy_generate_mipmap(st);
 207 #if FEATURE_EXT_framebuffer_blit
 208    st_destroy_blit(st);
 209 #endif
 210    st_destroy_clear(st);
 211 #if FEATURE_drawpix
 212    st_destroy_bitmap(st);
 213    st_destroy_drawpix(st);
 214 #endif
 215 #if FEATURE_OES_draw_texture
 216    st_destroy_drawtex(st);
 217 #endif
 218
 219    for (i = 0; i < Elements(st->state.sampler_texture); i++) {
 220       pipe_texture_reference(&st->state.sampler_texture[i], NULL);
 221    }
 222
 223    for (i = 0; i < Elements(st->state.constants); i++) {
 224       if (st->state.constants[i]) {
 225          pipe_buffer_reference(&st->state.constants[i], NULL);
 226       }
 227    }
 228
 229    if (st->default_texture) {
 230       st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
 231       st->default_texture = NULL;
 232    }
 233
 234    _mesa_free( st );
 235 }
 236
 237
 238 void st_destroy_context( struct st_context *st )
 239 {
 240    struct pipe_context *pipe = st->pipe;
 241    struct cso_context *cso = st->cso_context;
 242    GLcontext *ctx = st->ctx;
 243    GLuint i;
 244
 245    /* need to unbind and destroy CSO objects before anything else */
 246    cso_release_all(st->cso_context);
 247
 248    st_reference_fragprog(st, &st->fp, NULL);
 249    st_reference_vertprog(st, &st->vp, NULL);
 250
 251    /* release framebuffer surfaces */
 252    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 253       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 254    }
 255    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 256
 257    _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);
 258
 259    _vbo_DestroyContext(st->ctx);
 260
 261    _mesa_free_context_data(ctx);
 262
 263    st_destroy_context_priv(st);
 264
 265    cso_destroy_context(cso);
 266
 267    pipe->destroy( pipe );
 268
 269    _mesa_free(ctx);
 270 }
 271
 272
 273 GLboolean
 274 st_make_current(struct st_context *st,
 275                 struct st_framebuffer *draw,
 276                 struct st_framebuffer *read)
 277 {
 278    /* Call this periodically to detect when the user has begun using
 279     * GL rendering from multiple threads.
 280     */
 281    _glapi_check_multithread();
 282
 283    if (st) {
 284       if (!_mesa_make_current(st->ctx, &draw->Base, &read->Base))
 285          return GL_FALSE;
 286
 287       _mesa_check_init_viewport(st->ctx, draw->InitWidth, draw->InitHeight);
 288
 289       return GL_TRUE;
 290    }
 291    else {
 292       return _mesa_make_current(NULL, NULL, NULL);
 293    }
 294 }
 295
 296 struct st_context *st_get_current(void)
 297 {
 298    GET_CURRENT_CONTEXT(ctx);
 299
 300    return (ctx == NULL) ? NULL : ctx->st;
 301 }
 302
 303 void st_copy_context_state(struct st_context *dst,
 304                            struct st_context *src,
 305                            uint mask)
 306 {
 307    _mesa_copy_context(dst->ctx, src->ctx, mask);
 308 }
 309
 310
 311
 312 st_proc st_get_proc_address(const char *procname)
 313 {
 314    return (st_proc) _glapi_get_proc_address(procname);
 315 }
 316
 317
 318
 319 void st_init_driver_functions(struct dd_function_table *functions)
 320 {
 321    _mesa_init_glsl_driver_functions(functions);
 322
 323 #if FEATURE_accum
 324    st_init_accum_functions(functions);
 325 #endif
 326 #if FEATURE_EXT_framebuffer_blit
 327    st_init_blit_functions(functions);
 328 #endif
 329    st_init_bufferobject_functions(functions);
 330    st_init_clear_functions(functions);
 331 #if FEATURE_drawpix
 332    st_init_bitmap_functions(functions);
 333    st_init_drawpixels_functions(functions);
 334    st_init_rasterpos_functions(functions);
 335 #endif
 336
 337 #if FEATURE_OES_draw_texture
 338    st_init_drawtex_functions(functions);
 339 #endif
 340
 341    st_init_fbo_functions(functions);
 342 #if FEATURE_feedback
 343    st_init_feedback_functions(functions);
 344 #endif
 345    st_init_program_functions(functions);
 346 #if FEATURE_queryobj
 347    st_init_query_functions(functions);
 348 #endif
 349    st_init_cond_render_functions(functions);
 350    st_init_readpixels_functions(functions);
 351    st_init_texture_functions(functions);
 352    st_init_flush_functions(functions);
 353    st_init_string_functions(functions);
 354    st_init_viewport_functions(functions);
 355
 356    functions->UpdateState = st_invalidate_state;
 357 }