src/gallium/state_trackers/vega/vg_manager.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright 2009 VMware, Inc.  All Rights Reserved.
   6  * Copyright (C) 2010 LunarG Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  24  * DEALINGS IN THE SOFTWARE.
  25  *
  26  * Authors:
  27  *    Chia-I Wu <olv@lunarg.com>
  28  */
  29
  30 #include "state_tracker/st_api.h"
  31
  32 #include "pipe/p_context.h"
  33 #include "pipe/p_screen.h"
  34 #include "util/u_memory.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_format.h"
  37 #include "util/u_sampler.h"
  38
  39 #include "vg_api.h"
  40 #include "vg_manager.h"
  41 #include "vg_context.h"
  42 #include "image.h"
  43 #include "mask.h"
  44 #include "api.h"
  45
  46 static struct pipe_resource *
  47 create_texture(struct pipe_context *pipe, enum pipe_format format,
  48                     VGint width, VGint height)
  49 {
  50    struct pipe_resource templ;
  51
  52    memset(&templ, 0, sizeof(templ));
  53
  54    if (format != PIPE_FORMAT_NONE) {
  55       templ.format = format;
  56    }
  57    else {
  58       templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
  59    }
  60
  61    templ.target = PIPE_TEXTURE_2D;
  62    templ.width0 = width;
  63    templ.height0 = height;
  64    templ.depth0 = 1;
  65    templ.last_level = 0;
  66
  67    if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
  68       templ.bind = PIPE_BIND_DEPTH_STENCIL;
  69    } else {
  70       templ.bind = (PIPE_BIND_DISPLAY_TARGET |
  71                     PIPE_BIND_RENDER_TARGET |
  72                     PIPE_BIND_SAMPLER_VIEW);
  73    }
  74
  75    return pipe->screen->resource_create(pipe->screen, &templ);
  76 }
  77
  78 static struct pipe_sampler_view *
  79 create_tex_and_view(struct pipe_context *pipe, enum pipe_format format,
  80                     VGint width, VGint height)
  81 {
  82    struct pipe_resource *texture;
  83    struct pipe_sampler_view view_templ;
  84    struct pipe_sampler_view *view;
  85
  86    texture = create_texture(pipe, format, width, height);
  87
  88    if (!texture)
  89       return NULL;
  90
  91    u_sampler_view_default_template(&view_templ, texture, texture->format);
  92    view = pipe->create_sampler_view(pipe, texture, &view_templ);
  93    /* want the texture to go away if the view is freed */
  94    pipe_resource_reference(&texture, NULL);
  95
  96    return view;
  97 }
  98
  99 static void
 100 setup_new_alpha_mask(struct vg_context *ctx, struct st_framebuffer *stfb)
 101 {
 102    struct pipe_context *pipe = ctx->pipe;
 103    struct pipe_sampler_view *old_sampler_view = stfb->alpha_mask_view;
 104
 105    /*
 106      we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
 107      this texture and use it as a sampler, so while this wastes some
 108      space it makes both of those a lot simpler
 109    */
 110    stfb->alpha_mask_view = create_tex_and_view(pipe,
 111          PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 112
 113    if (!stfb->alpha_mask_view) {
 114       if (old_sampler_view)
 115          pipe_sampler_view_reference(&old_sampler_view, NULL);
 116       return;
 117    }
 118
 119    /* XXX could this call be avoided? */
 120    vg_validate_state(ctx);
 121
 122    /* alpha mask starts with 1.f alpha */
 123    mask_fill(0, 0, stfb->width, stfb->height, 1.f);
 124
 125    /* if we had an old surface copy it over */
 126    if (old_sampler_view) {
 127       struct pipe_subresource subsurf, subold_surf;
 128       subsurf.face = 0;
 129       subsurf.level = 0;
 130       subold_surf.face = 0;
 131       subold_surf.level = 0;
 132       pipe->resource_copy_region(pipe,
 133                                  stfb->alpha_mask_view->texture,
 134                                  subsurf,
 135                                  0, 0, 0,
 136                                  old_sampler_view->texture,
 137                                  subold_surf,
 138                                  0, 0, 0,
 139                                  MIN2(old_sampler_view->texture->width0,
 140                                       stfb->alpha_mask_view->texture->width0),
 141                                  MIN2(old_sampler_view->texture->height0,
 142                                       stfb->alpha_mask_view->texture->height0));
 143    }
 144
 145    /* Free the old texture
 146     */
 147    if (old_sampler_view)
 148       pipe_sampler_view_reference(&old_sampler_view, NULL);
 149 }
 150
 151 static boolean
 152 vg_context_update_depth_stencil_rb(struct vg_context * ctx,
 153                                    uint width, uint height)
 154 {
 155    struct st_renderbuffer *dsrb = ctx->draw_buffer->dsrb;
 156    struct pipe_context *pipe = ctx->pipe;
 157    unsigned surface_usage;
 158
 159    if ((dsrb->width == width && dsrb->height == height) && dsrb->texture)
 160       return FALSE;
 161
 162    /* unreference existing ones */
 163    pipe_surface_reference(&dsrb->surface, NULL);
 164    pipe_resource_reference(&dsrb->texture, NULL);
 165    dsrb->width = dsrb->height = 0;
 166
 167    /* Probably need dedicated flags for surface usage too:
 168     */
 169    surface_usage = PIPE_BIND_DEPTH_STENCIL; /* XXX: was: RENDER_TARGET */
 170
 171    dsrb->texture = create_texture(pipe, dsrb->format, width, height);
 172    if (!dsrb->texture)
 173       return TRUE;
 174
 175    dsrb->surface = pipe->screen->get_tex_surface(pipe->screen,
 176                                                  dsrb->texture,
 177                                                  0, 0, 0,
 178                                                  surface_usage);
 179    if (!dsrb->surface) {
 180       pipe_resource_reference(&dsrb->texture, NULL);
 181       return TRUE;
 182    }
 183
 184    dsrb->width = width;
 185    dsrb->height = height;
 186
 187    assert(dsrb->surface->width == width);
 188    assert(dsrb->surface->height == height);
 189
 190    return TRUE;
 191 }
 192
 193 static boolean
 194 vg_context_update_color_rb(struct vg_context *ctx, struct pipe_resource *pt)
 195 {
 196    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 197    struct pipe_screen *screen = ctx->pipe->screen;
 198
 199    if (strb->texture == pt) {
 200       pipe_resource_reference(&pt, NULL);
 201       return FALSE;
 202    }
 203
 204    /* unreference existing ones */
 205    pipe_surface_reference(&strb->surface, NULL);
 206    pipe_resource_reference(&strb->texture, NULL);
 207    strb->width = strb->height = 0;
 208
 209    strb->texture = pt;
 210    strb->surface = screen->get_tex_surface(screen, strb->texture, 0, 0, 0,
 211                                            PIPE_BIND_RENDER_TARGET);
 212    if (!strb->surface) {
 213       pipe_resource_reference(&strb->texture, NULL);
 214       return TRUE;
 215    }
 216
 217    strb->width = pt->width0;
 218    strb->height = pt->height0;
 219
 220    return TRUE;
 221 }
 222
 223 static void
 224 vg_context_update_draw_buffer(struct vg_context *ctx, struct pipe_resource *pt)
 225 {
 226    struct st_framebuffer *stfb = ctx->draw_buffer;
 227    boolean new_cbuf, new_zsbuf, new_size;
 228
 229    new_cbuf = vg_context_update_color_rb(ctx, pt);
 230    new_zsbuf =
 231       vg_context_update_depth_stencil_rb(ctx, pt->width0, pt->height0);
 232
 233    new_size = (stfb->width != pt->width0 || stfb->height != pt->height0);
 234    stfb->width = pt->width0;
 235    stfb->height = pt->height0;
 236
 237    if (new_cbuf || new_zsbuf || new_size) {
 238       struct pipe_framebuffer_state *state = &ctx->state.g3d.fb;
 239
 240       memset(state, 0, sizeof(struct pipe_framebuffer_state));
 241       state->width  = stfb->width;
 242       state->height = stfb->height;
 243       state->nr_cbufs = 1;
 244       state->cbufs[0] = stfb->strb->surface;
 245       state->zsbuf = stfb->dsrb->surface;
 246
 247       cso_set_framebuffer(ctx->cso_context, state);
 248    }
 249
 250    if (new_zsbuf || new_size) {
 251       ctx->state.dirty |= VIEWPORT_DIRTY;
 252       ctx->state.dirty |= DEPTH_STENCIL_DIRTY;/*to reset the scissors*/
 253
 254       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 0.0, 0);
 255
 256       /* we need all the other state already set */
 257
 258       setup_new_alpha_mask(ctx, stfb);
 259
 260       pipe_sampler_view_reference( &stfb->blend_texture_view, NULL);
 261       stfb->blend_texture_view = create_tex_and_view(ctx->pipe,
 262             PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 263    }
 264 }
 265
 266 /**
 267  * Flush the front buffer if the current context renders to the front buffer.
 268  */
 269 void
 270 vg_manager_flush_frontbuffer(struct vg_context *ctx)
 271 {
 272    struct st_framebuffer *stfb = ctx->draw_buffer;
 273
 274    if (!stfb)
 275       return;
 276
 277    switch (stfb->strb_att) {
 278    case ST_ATTACHMENT_FRONT_LEFT:
 279    case ST_ATTACHMENT_FRONT_RIGHT:
 280       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
 281       break;
 282    default:
 283       break;
 284    }
 285 }
 286
 287 /**
 288  * Re-validate the framebuffer.
 289  */
 290 void
 291 vg_manager_validate_framebuffer(struct vg_context *ctx)
 292 {
 293    struct st_framebuffer *stfb = ctx->draw_buffer;
 294    struct pipe_resource *pt;
 295
 296    /* no binding surface */
 297    if (!stfb)
 298       return;
 299
 300    if (!p_atomic_read(&ctx->draw_buffer_invalid))
 301       return;
 302
 303    /* validate the fb */
 304    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 305       return;
 306
 307    /*
 308     * unset draw_buffer_invalid first because vg_context_update_draw_buffer
 309     * will cause the framebuffer to be validated again because of a call to
 310     * vg_validate_state
 311     */
 312    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 313    vg_context_update_draw_buffer(ctx, pt);
 314 }
 315
 316
 317 static void
 318 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 319                                       struct st_framebuffer_iface *stfbi)
 320 {
 321    struct vg_context *ctx = (struct vg_context *) stctxi;
 322    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 323 }
 324
 325 static void
 326 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 327                  struct pipe_fence_handle **fence)
 328 {
 329    struct vg_context *ctx = (struct vg_context *) stctxi;
 330    ctx->pipe->flush(ctx->pipe, flags, fence);
 331    if (flags & PIPE_FLUSH_RENDER_CACHE)
 332       vg_manager_flush_frontbuffer(ctx);
 333 }
 334
 335 static void
 336 vg_context_destroy(struct st_context_iface *stctxi)
 337 {
 338    struct vg_context *ctx = (struct vg_context *) stctxi;
 339    vg_destroy_context(ctx);
 340 }
 341
 342 static struct st_context_iface *
 343 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 344                       const struct st_visual *visual,
 345                       struct st_context_iface *shared_stctxi)
 346 {
 347    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 348    struct vg_context *ctx;
 349    struct pipe_context *pipe;
 350
 351    pipe = smapi->screen->context_create(smapi->screen, NULL);
 352    if (!pipe)
 353       return NULL;
 354    ctx = vg_create_context(pipe, NULL, shared_ctx);
 355    if (!ctx) {
 356       pipe->destroy(pipe);
 357       return NULL;
 358    }
 359
 360    ctx->iface.destroy = vg_context_destroy;
 361
 362    ctx->iface.notify_invalid_framebuffer =
 363       vg_context_notify_invalid_framebuffer;
 364    ctx->iface.flush = vg_context_flush;
 365
 366    ctx->iface.teximage = NULL;
 367    ctx->iface.copy = NULL;
 368
 369    ctx->iface.st_context_private = (void *) smapi;
 370
 371    return &ctx->iface;
 372 }
 373
 374 static struct st_renderbuffer *
 375 create_renderbuffer(enum pipe_format format)
 376 {
 377    struct st_renderbuffer *strb;
 378
 379    strb = CALLOC_STRUCT(st_renderbuffer);
 380    if (strb)
 381       strb->format = format;
 382
 383    return strb;
 384 }
 385
 386 static void
 387 destroy_renderbuffer(struct st_renderbuffer *strb)
 388 {
 389    pipe_surface_reference(&strb->surface, NULL);
 390    pipe_resource_reference(&strb->texture, NULL);
 391    free(strb);
 392 }
 393
 394 /**
 395  * Decide the buffer to render to.
 396  */
 397 static enum st_attachment_type
 398 choose_attachment(struct st_framebuffer_iface *stfbi)
 399 {
 400    enum st_attachment_type statt;
 401
 402    statt = stfbi->visual->render_buffer;
 403    if (statt != ST_ATTACHMENT_INVALID) {
 404       /* use the buffer given by the visual, unless it is unavailable */
 405       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 406          switch (statt) {
 407          case ST_ATTACHMENT_BACK_LEFT:
 408             statt = ST_ATTACHMENT_FRONT_LEFT;
 409             break;
 410          case ST_ATTACHMENT_BACK_RIGHT:
 411             statt = ST_ATTACHMENT_FRONT_RIGHT;
 412             break;
 413          default:
 414             break;
 415          }
 416
 417          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 418             statt = ST_ATTACHMENT_INVALID;
 419       }
 420    }
 421
 422    return statt;
 423 }
 424
 425 /**
 426  * Bind the context to the given framebuffers.
 427  */
 428 static boolean
 429 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 430                              struct st_framebuffer_iface *stdrawi,
 431                              struct st_framebuffer_iface *streadi)
 432 {
 433    struct vg_context *ctx = (struct vg_context *) stctxi;
 434    struct st_framebuffer *stfb;
 435    enum st_attachment_type strb_att;
 436
 437    /* the draw and read framebuffers must be the same */
 438    if (stdrawi != streadi)
 439       return FALSE;
 440
 441    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 442
 443    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 444
 445    if (ctx->draw_buffer) {
 446       stfb = ctx->draw_buffer;
 447
 448       /* free the existing fb */
 449       if (!stdrawi ||
 450           stfb->strb_att != strb_att ||
 451           stfb->strb->format != stdrawi->visual->color_format ||
 452           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 453          destroy_renderbuffer(stfb->strb);
 454          destroy_renderbuffer(stfb->dsrb);
 455          free(stfb);
 456
 457          ctx->draw_buffer = NULL;
 458       }
 459    }
 460
 461    if (!stdrawi)
 462       return TRUE;
 463
 464    if (strb_att == ST_ATTACHMENT_INVALID)
 465       return FALSE;
 466
 467    /* create a new fb */
 468    if (!ctx->draw_buffer) {
 469       stfb = CALLOC_STRUCT(st_framebuffer);
 470       if (!stfb)
 471          return FALSE;
 472
 473       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 474       if (!stfb->strb) {
 475          free(stfb);
 476          return FALSE;
 477       }
 478
 479       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 480       if (!stfb->dsrb) {
 481          free(stfb->strb);
 482          free(stfb);
 483          return FALSE;
 484       }
 485
 486       stfb->width = 0;
 487       stfb->height = 0;
 488       stfb->strb_att = strb_att;
 489
 490       ctx->draw_buffer = stfb;
 491    }
 492
 493    ctx->draw_buffer->iface = stdrawi;
 494
 495    return TRUE;
 496 }
 497
 498 static boolean
 499 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 500                     struct st_framebuffer_iface *stdrawi,
 501                     struct st_framebuffer_iface *streadi)
 502 {
 503    struct vg_context *ctx = (struct vg_context *) stctxi;
 504
 505    if (stctxi)
 506       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 507    vg_set_current_context(ctx);
 508
 509    return TRUE;
 510 }
 511
 512 static struct st_context_iface *
 513 vg_api_get_current(struct st_api *stapi)
 514 {
 515    struct vg_context *ctx = vg_current_context();
 516
 517    return (ctx) ? &ctx->iface : NULL;
 518 }
 519
 520 static boolean
 521 vg_api_is_visual_supported(struct st_api *stapi,
 522                            const struct st_visual *visual)
 523 {
 524    /* the impl requires a depth/stencil buffer */
 525    return util_format_is_depth_and_stencil(visual->depth_stencil_format);
 526 }
 527
 528 static st_proc_t
 529 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 530 {
 531    return api_get_proc_address(procname);
 532 }
 533
 534 static void
 535 vg_api_destroy(struct st_api *stapi)
 536 {
 537 }
 538
 539 static const struct st_api vg_api = {
 540    vg_api_destroy,
 541    vg_api_get_proc_address,
 542    vg_api_is_visual_supported,
 543    vg_api_create_context,
 544    vg_api_make_current,
 545    vg_api_get_current,
 546 };
 547
 548 const struct st_api *
 549 vg_api_get(void)
 550 {
 551    return &vg_api;
 552 }