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_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_atom.h"
  60 #include "st_draw.h"
  61 #include "st_extensions.h"
  62 #include "st_gen_mipmap.h"
  63 #include "st_program.h"
  64 #include "pipe/p_context.h"
  65 #include "util/u_inlines.h"
  66 #include "util/u_rect.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 /** Default method for pipe_context::surface_copy() */
 102 static void
 103 st_surface_copy(struct pipe_context *pipe,
 104                 struct pipe_surface *dst,
 105                 unsigned dst_x, unsigned dst_y,
 106                 struct pipe_surface *src,
 107                 unsigned src_x, unsigned src_y,
 108                 unsigned w, unsigned h)
 109 {
 110    util_surface_copy(pipe, FALSE, dst, dst_x, dst_y, src, src_x, src_y, w, h);
 111 }
 112
 113
 114 static struct st_context *
 115 st_create_context_priv( GLcontext *ctx, struct pipe_context *pipe )
 116 {
 117    uint i;
 118    struct st_context *st = ST_CALLOC_STRUCT( st_context );
 119
 120    ctx->st = st;
 121
 122    st->ctx = ctx;
 123    st->pipe = pipe;
 124
 125    /* XXX: this is one-off, per-screen init: */
 126    st_debug_init();
 127
 128    /* state tracker needs the VBO module */
 129    _vbo_CreateContext(ctx);
 130
 131 #if FEATURE_feedback || FEATURE_drawpix
 132    st->draw = draw_create(); /* for selection/feedback */
 133
 134    /* Disable draw options that might convert points/lines to tris, etc.
 135     * as that would foul-up feedback/selection mode.
 136     */
 137    draw_wide_line_threshold(st->draw, 1000.0f);
 138    draw_wide_point_threshold(st->draw, 1000.0f);
 139    draw_enable_line_stipple(st->draw, FALSE);
 140    draw_enable_point_sprites(st->draw, FALSE);
 141 #endif
 142
 143    st->dirty.mesa = ~0;
 144    st->dirty.st = ~0;
 145
 146    st->cso_context = cso_create_context(pipe);
 147
 148    st_init_atoms( st );
 149    st_init_bitmap(st);
 150    st_init_clear(st);
 151    st_init_draw( st );
 152    st_init_generate_mipmap(st);
 153    st_init_blit(st);
 154
 155    for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
 156       st->state.sampler_list[i] = &st->state.samplers[i];
 157
 158    for (i = 0; i < 3; i++) {
 159       memset(&st->velems_util_draw[i], 0, sizeof(struct pipe_vertex_element));
 160       st->velems_util_draw[i].src_offset = i * 4 * sizeof(float);
 161       st->velems_util_draw[i].instance_divisor = 0;
 162       st->velems_util_draw[i].vertex_buffer_index = 0;
 163       st->velems_util_draw[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 164    }
 165
 166    /* we want all vertex data to be placed in buffer objects */
 167    vbo_use_buffer_objects(ctx);
 168
 169    /* Need these flags:
 170     */
 171    st->ctx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
 172
 173    st->ctx->VertexProgram._MaintainTnlProgram = GL_TRUE;
 174
 175    st->pixel_xfer.cache = _mesa_new_program_cache();
 176
 177    st->force_msaa = st_get_msaa();
 178
 179    /* GL limits and extensions */
 180    st_init_limits(st);
 181    st_init_extensions(st);
 182
 183    /* plug in helper driver functions if needed */
 184    if (!pipe->surface_copy)
 185       pipe->surface_copy = st_surface_copy;
 186
 187    return st;
 188 }
 189
 190
 191 struct st_context *st_create_context(struct pipe_context *pipe,
 192                                      const __GLcontextModes *visual,
 193                                      struct st_context *share)
 194 {
 195    GLcontext *ctx;
 196    GLcontext *shareCtx = share ? share->ctx : NULL;
 197    struct dd_function_table funcs;
 198
 199    memset(&funcs, 0, sizeof(funcs));
 200    st_init_driver_functions(&funcs);
 201
 202    ctx = _mesa_create_context(visual, shareCtx, &funcs, NULL);
 203
 204    /* XXX: need a capability bit in gallium to query if the pipe
 205     * driver prefers DP4 or MUL/MAD for vertex transformation.
 206     */
 207    if (debug_get_bool_option("MESA_MVP_DP4", FALSE))
 208       _mesa_set_mvp_with_dp4( ctx, GL_TRUE );
 209
 210    return st_create_context_priv(ctx, pipe);
 211 }
 212
 213
 214 static void st_destroy_context_priv( struct st_context *st )
 215 {
 216    uint i;
 217
 218 #if FEATURE_feedback || FEATURE_drawpix
 219    draw_destroy(st->draw);
 220 #endif
 221    st_destroy_atoms( st );
 222    st_destroy_draw( st );
 223    st_destroy_generate_mipmap(st);
 224 #if FEATURE_EXT_framebuffer_blit
 225    st_destroy_blit(st);
 226 #endif
 227    st_destroy_clear(st);
 228 #if FEATURE_drawpix
 229    st_destroy_bitmap(st);
 230    st_destroy_drawpix(st);
 231 #endif
 232 #if FEATURE_OES_draw_texture
 233    st_destroy_drawtex(st);
 234 #endif
 235
 236    for (i = 0; i < Elements(st->state.sampler_views); i++) {
 237       pipe_sampler_view_reference(&st->state.sampler_views[i], NULL);
 238    }
 239
 240    for (i = 0; i < Elements(st->state.constants); i++) {
 241       if (st->state.constants[i]) {
 242          pipe_buffer_reference(&st->state.constants[i], NULL);
 243       }
 244    }
 245
 246    if (st->default_texture) {
 247       st->ctx->Driver.DeleteTexture(st->ctx, st->default_texture);
 248       st->default_texture = NULL;
 249    }
 250
 251    free( st );
 252 }
 253
 254
 255 void st_destroy_context( struct st_context *st )
 256 {
 257    struct pipe_context *pipe = st->pipe;
 258    struct cso_context *cso = st->cso_context;
 259    GLcontext *ctx = st->ctx;
 260    GLuint i;
 261
 262    /* need to unbind and destroy CSO objects before anything else */
 263    cso_release_all(st->cso_context);
 264
 265    st_reference_fragprog(st, &st->fp, NULL);
 266    st_reference_vertprog(st, &st->vp, NULL);
 267
 268    /* release framebuffer surfaces */
 269    for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
 270       pipe_surface_reference(&st->state.framebuffer.cbufs[i], NULL);
 271    }
 272    pipe_surface_reference(&st->state.framebuffer.zsbuf, NULL);
 273
 274    _mesa_delete_program_cache(st->ctx, st->pixel_xfer.cache);
 275
 276    _vbo_DestroyContext(st->ctx);
 277
 278    _mesa_free_context_data(ctx);
 279
 280    st_destroy_context_priv(st);
 281
 282    cso_destroy_context(cso);
 283
 284    pipe->destroy( pipe );
 285
 286    free(ctx);
 287 }
 288
 289
 290 GLboolean
 291 st_make_current(struct st_context *st,
 292                 struct st_framebuffer *draw,
 293                 struct st_framebuffer *read,
 294                 void *winsys_drawable_handle )
 295 {
 296    /* Call this periodically to detect when the user has begun using
 297     * GL rendering from multiple threads.
 298     */
 299    _glapi_check_multithread();
 300
 301    if (st) {
 302       if (!_mesa_make_current(st->ctx, &draw->Base, &read->Base)) {
 303          st->pipe->priv = NULL;
 304          return GL_FALSE;
 305       }
 306
 307       _mesa_check_init_viewport(st->ctx, draw->InitWidth, draw->InitHeight);
 308       st->winsys_drawable_handle = winsys_drawable_handle;
 309
 310       return GL_TRUE;
 311    }
 312    else {
 313       return _mesa_make_current(NULL, NULL, NULL);
 314    }
 315 }
 316
 317 struct st_context *st_get_current(void)
 318 {
 319    GET_CURRENT_CONTEXT(ctx);
 320
 321    return (ctx == NULL) ? NULL : ctx->st;
 322 }
 323
 324 void st_copy_context_state(struct st_context *dst,
 325                            struct st_context *src,
 326                            uint mask)
 327 {
 328    _mesa_copy_context(dst->ctx, src->ctx, mask);
 329 }
 330
 331
 332
 333 st_proc st_get_proc_address(const char *procname)
 334 {
 335    return (st_proc) _glapi_get_proc_address(procname);
 336 }
 337
 338
 339
 340 void st_init_driver_functions(struct dd_function_table *functions)
 341 {
 342    _mesa_init_glsl_driver_functions(functions);
 343
 344 #if FEATURE_accum
 345    st_init_accum_functions(functions);
 346 #endif
 347 #if FEATURE_EXT_framebuffer_blit
 348    st_init_blit_functions(functions);
 349 #endif
 350    st_init_bufferobject_functions(functions);
 351    st_init_clear_functions(functions);
 352 #if FEATURE_drawpix
 353    st_init_bitmap_functions(functions);
 354    st_init_drawpixels_functions(functions);
 355    st_init_rasterpos_functions(functions);
 356 #endif
 357
 358 #if FEATURE_OES_draw_texture
 359    st_init_drawtex_functions(functions);
 360 #endif
 361
 362    st_init_fbo_functions(functions);
 363 #if FEATURE_feedback
 364    st_init_feedback_functions(functions);
 365 #endif
 366    st_init_program_functions(functions);
 367 #if FEATURE_queryobj
 368    st_init_query_functions(functions);
 369 #endif
 370    st_init_cond_render_functions(functions);
 371    st_init_readpixels_functions(functions);
 372    st_init_texture_functions(functions);
 373    st_init_flush_functions(functions);
 374    st_init_string_functions(functions);
 375
 376    functions->UpdateState = st_invalidate_state;
 377 }