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_context.h"
  34 #include "st_public.h"
  35 #include "st_debug.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_eglimage.h"
  50 #include "st_cb_fbo.h"
  51 #if FEATURE_feedback
  52 #include "st_cb_feedback.h"
  53 #endif
  54 #include "st_cb_program.h"
  55 #include "st_cb_queryobj.h"
  56 #include "st_cb_readpixels.h"
  57 #include "st_cb_texture.h"
  58 #include "st_cb_flush.h"
  59 #include "st_cb_strings.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 "util/u_rect.h"
  68 #include "draw/draw_context.h"
  69 #include "cso_cache/cso_context.h"
  70
  71
  72 /**
  73  * Called via ctx->Driver.UpdateState()
  74  */
  75 void st_invalidate_state(GLcontext * ctx, GLuint new_state)
  76 {
  77    struct st_context *st = st_context(ctx);
  78
  79    st->dirty.mesa |= new_state;
  80    st->dirty.st |= ST_NEW_MESA;
  81
  82    /* This is the only core Mesa module we depend upon.
  83     * No longer use swrast, swsetup, tnl.
  84     */
  85    _vbo_InvalidateState(ctx, new_state);
  86 }
  87
  88
  89 /**
  90  * Check for multisample env var override.
  91  */
  92 int
  93 st_get_msaa(void)
  94 {
  95    const char *msaa = _mesa_getenv("__GL_FSAA_MODE");
  96    if (msaa)
  97       return atoi(msaa);
  98    return 0;
  99 }
 100
 101
 102 /** Default method for pipe_context::surface_copy() */
 103 static void
 104 st_surface_copy(struct pipe_context *pipe,
 105                 struct pipe_surface *dst,
 106                 unsigned dst_x, unsigned dst_y,
 107                 struct pipe_surface *src,
 108                 unsigned src_x, unsigned src_y,
 109                 unsigned w, unsigned h)
 110 {
 111    util_surface_copy(pipe, FALSE, dst, dst_x, dst_y, src, src_x, src_y, w, h);
 112 }
 113
 114
 115 static struct st_context *
 116 st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
 117 {
 118    uint i;
 119    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 120
 121    ctx->st = st;
 122
 123    st->ctx = ctx;
 124    st->pipe = pipe;
 125
 126    /* XXX: this is one-off, per-screen init: */
 127    st_debug_init();
 128
 129    /* state tracker needs the VBO module */
 130    _vbo_CreateContext(ctx);
 131
 132 #if FEATURE_feedback || FEATURE_drawpix
 133    st->draw = draw_create(); /* for selection/feedback */
 134
 135    /* Disable draw options that might convert points/lines to tris, etc.
 136     * as that would foul-up feedback/selection mode.
 137     */
 138    draw_wide_line_threshold(st->draw, 1000.0f);
 139    draw_wide_point_threshold(st->draw, 1000.0f);
 140    draw_enable_line_stipple(st->draw, FALSE);
 141    draw_enable_point_sprites(st->draw, FALSE);
 142 #endif
 143
 144    st->dirty.mesa = ~0;
 145    st->dirty.st = ~0;
 146
 147    st->cso_context = cso_create_context(pipe);
 148
 149    st_init_atoms( st );
 150    st_init_bitmap(st);
 151    st_init_clear(st);
 152    st_init_draw( st );
 153    st_init_generate_mipmap(st);
 154    st_init_blit(st);
 155
 156    for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 157       st->state.sampler_list[i] = &st->state.samplers[i];
 158
 159    for (i = 0; i < 3; i++) {
 160       memset(&st->velems_util_draw[i], 0, sizeof(struct pipe_vertex_element));
 161       st->velems_util_draw[i].src_offset = i * 4 * sizeof(float);
 162       st->velems_util_draw[i].instance_divisor = 0;
 163       st->velems_util_draw[i].vertex_buffer_index = 0;
 164       st->velems_util_draw[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 165    }
 166
 167    /* we want all vertex data to be placed in buffer objects */
 168    vbo_use_buffer_objects(ctx);
 169
 170    /* Need these flags:
 171     */
 172    st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 173
 174    st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 175
 176    st->pixel_xfer.cache = _mesa_new_program_cache();
 177
 178    st->force_msaa = st_get_msaa();
 179
 180    /* GL limits and extensions */
 181    st_init_limits(st);
 182    st_init_extensions(st);
 183
 184    /* plug in helper driver functions if needed */
 185    if (!pipe->surface_copy)
 186       pipe->surface_copy = st_surface_copy;
 187
 188    return st;
 189 }
 190
 191
 192 struct st_context *st_create_context(struct pipe_context *pipe,
 193                                      const __GLcontextModes *visual,
 194                                      struct st_context *share)
 195 {
 196    GLcontext *ctx;
 197    GLcontext *shareCtx = share ? share->ctx : NULL;
 198    struct dd_function_table funcs;
 199
 200    memset(&funcs, 0, sizeof(funcs));
 201    st_init_driver_functions(&funcs);
 202
 203    ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL);
 204
 205    /* XXX: need a capability bit in gallium to query if the pipe
 206     * driver prefers DP4 or MUL/MAD for vertex transformation.
 207     */
 208    if (debug_get_bool_option("MESA_MVP_DP4", FALSE))
 209       _mesa_set_mvp_with_dp4( ctx, GL_TRUE );
 210
 211    return st_create_context_priv(ctx, pipe);
 212 }
 213
 214
 215 static void st_destroy_context_priv( struct st_context *st )
 216 {
 217    uint i;
 218
 219 #if FEATURE_feedback || FEATURE_drawpix
 220    draw_destroy(st->draw);
 221 #endif
 222    st_destroy_atoms( st );
 223    st_destroy_draw( st );
 224    st_destroy_generate_mipmap(st);
 225 #if FEATURE_EXT_framebuffer_blit
 226    st_destroy_blit(st);
 227 #endif
 228    st_destroy_clear(st);
 229 #if FEATURE_drawpix
 230    st_destroy_bitmap(st);
 231    st_destroy_drawpix(st);
 232 #endif
 233 #if FEATURE_OES_draw_texture
 234    st_destroy_drawtex(st);
 235 #endif
 236
 237    for (i = 0; i < Elements(st->state.sampler_views); i++) {
 238       pipe_sampler_view_reference(&st->state.sampler_views[i], NULL);
 239    }
 240
 241    for (i = 0; i < Elements(st->state.constants); i++) {
 242       if (st->state.constants[i]) {
 243          pipe_resource_reference(&st->state.constants[i], NULL);
 244       }
 245    }
 246
 247    if (st->default_texture) {
 248       st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
 249       st->default_texture = NULL;
 250    }
 251
 252    free( st );
 253 }
 254
 255
 256 void st_destroy_context( struct st_context *st )
 257 {
 258    struct pipe_context *pipe = st->pipe;
 259    struct cso_context *cso = st->cso_context;
 260    GLcontext *ctx = st->ctx;
 261    GLuint i;
 262
 263    /* need to unbind and destroy CSO objects before anything else */
 264    cso_release_all(st->cso_context);
 265
 266    st_reference_fragprog(st, &st->fp, NULL);
 267    st_reference_vertprog(st, &st->vp, NULL);
 268
 269    /* release framebuffer surfaces */
 270    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 271       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 272    }
 273    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 274
 275    _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);
 276
 277    _vbo_DestroyContext(st->ctx);
 278
 279    _mesa_free_context_data(ctx);
 280
 281    st_destroy_context_priv(st);
 282
 283    cso_destroy_context(cso);
 284
 285    pipe->destroy( pipe );
 286
 287    free(ctx);
 288 }
 289
 290
 291 GLboolean
 292 st_make_current(struct st_context *st,
 293                 struct st_framebuffer *draw,
 294                 struct st_framebuffer *read,
 295                 void *winsys_drawable_handle )
 296 {
 297    /* Call this periodically to detect when the user has begun using
 298     * GL rendering from multiple threads.
 299     */
 300    _glapi_check_multithread();
 301
 302    if (st) {
 303       if (!_mesa_make_current(st->ctx, &draw->Base, &read->Base)) {
 304          st->pipe->priv = NULL;
 305          return GL_FALSE;
 306       }
 307
 308       _mesa_check_init_viewport(st->ctx, draw->InitWidth, draw->InitHeight);
 309       st->winsys_drawable_handle = winsys_drawable_handle;
 310
 311       return GL_TRUE;
 312    }
 313    else {
 314       return _mesa_make_current(NULL, NULL, NULL);
 315    }
 316 }
 317
 318 struct st_context *st_get_current(void)
 319 {
 320    GET_CURRENT_CONTEXT(ctx);
 321
 322    return (ctx == NULL) ? NULL : ctx->st;
 323 }
 324
 325 void st_copy_context_state(struct st_context *dst,
 326                            struct st_context *src,
 327                            uint mask)
 328 {
 329    _mesa_copy_context(dst->ctx, src->ctx, mask);
 330 }
 331
 332
 333
 334 st_proc st_get_proc_address(const char *procname)
 335 {
 336    return (st_proc) _glapi_get_proc_address(procname);
 337 }
 338
 339
 340
 341 void st_init_driver_functions(struct dd_function_table *functions)
 342 {
 343    _mesa_init_glsl_driver_functions(functions);
 344
 345 #if FEATURE_accum
 346    st_init_accum_functions(functions);
 347 #endif
 348 #if FEATURE_EXT_framebuffer_blit
 349    st_init_blit_functions(functions);
 350 #endif
 351    st_init_bufferobject_functions(functions);
 352    st_init_clear_functions(functions);
 353 #if FEATURE_drawpix
 354    st_init_bitmap_functions(functions);
 355    st_init_drawpixels_functions(functions);
 356    st_init_rasterpos_functions(functions);
 357 #endif
 358
 359 #if FEATURE_OES_draw_texture
 360    st_init_drawtex_functions(functions);
 361 #endif
 362
 363    st_init_eglimage_functions(functions);
 364
 365    st_init_fbo_functions(functions);
 366 #if FEATURE_feedback
 367    st_init_feedback_functions(functions);
 368 #endif
 369    st_init_program_functions(functions);
 370 #if FEATURE_queryobj
 371    st_init_query_functions(functions);
 372 #endif
 373    st_init_cond_render_functions(functions);
 374    st_init_readpixels_functions(functions);
 375    st_init_texture_functions(functions);
 376    st_init_flush_functions(functions);
 377    st_init_string_functions(functions);
 378
 379    functions->UpdateState = st_invalidate_state;
 380 }