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