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_surface *surface = pipe->screen->get_tex_surface(
 128          pipe->screen,
 129          stfb->alpha_mask_view->texture,
 130          0, 0, 0,
 131          PIPE_BIND_RENDER_TARGET |
 132          PIPE_BIND_BLIT_DESTINATION);
 133       struct pipe_surface *old_surface = pipe->screen->get_tex_surface(
 134          pipe->screen,
 135          old_sampler_view->texture,
 136          0, 0, 0,
 137          PIPE_BIND_BLIT_SOURCE);
 138       pipe->surface_copy(pipe,
 139                          surface,
 140                          0, 0,
 141                          old_surface,
 142                          0, 0,
 143                          MIN2(old_surface->width, surface->width),
 144                          MIN2(old_surface->height, surface->height));
 145       if (surface)
 146          pipe_surface_reference(&surface, NULL);
 147       if (old_surface)
 148          pipe_surface_reference(&old_surface, NULL);
 149    }
 150
 151    /* Free the old texture
 152     */
 153    if (old_sampler_view)
 154       pipe_sampler_view_reference(&old_sampler_view, NULL);
 155 }
 156
 157 static boolean
 158 vg_context_update_depth_stencil_rb(struct vg_context * ctx,
 159                                    uint width, uint height)
 160 {
 161    struct st_renderbuffer *dsrb = ctx->draw_buffer->dsrb;
 162    struct pipe_context *pipe = ctx->pipe;
 163    unsigned surface_usage;
 164
 165    if ((dsrb->width == width && dsrb->height == height) && dsrb->texture)
 166       return FALSE;
 167
 168    /* unreference existing ones */
 169    pipe_surface_reference(&dsrb->surface, NULL);
 170    pipe_resource_reference(&dsrb->texture, NULL);
 171    dsrb->width = dsrb->height = 0;
 172
 173    /* Probably need dedicated flags for surface usage too:
 174     */
 175    surface_usage = (PIPE_BIND_RENDER_TARGET |
 176                     PIPE_BIND_BLIT_SOURCE |
 177                     PIPE_BIND_BLIT_DESTINATION);
 178
 179    dsrb->texture = create_texture(pipe, dsrb->format, width, height);
 180    if (!dsrb->texture)
 181       return TRUE;
 182
 183    dsrb->surface = pipe->screen->get_tex_surface(pipe->screen,
 184                                                  dsrb->texture,
 185                                                  0, 0, 0,
 186                                                  surface_usage);
 187    if (!dsrb->surface) {
 188       pipe_resource_reference(&dsrb->texture, NULL);
 189       return TRUE;
 190    }
 191
 192    dsrb->width = width;
 193    dsrb->height = height;
 194
 195    assert(dsrb->surface->width == width);
 196    assert(dsrb->surface->height == height);
 197
 198    return TRUE;
 199 }
 200
 201 static boolean
 202 vg_context_update_color_rb(struct vg_context *ctx, struct pipe_resource *pt)
 203 {
 204    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 205    struct pipe_screen *screen = ctx->pipe->screen;
 206
 207    if (strb->texture == pt) {
 208       pipe_resource_reference(&pt, NULL);
 209       return FALSE;
 210    }
 211
 212    /* unreference existing ones */
 213    pipe_surface_reference(&strb->surface, NULL);
 214    pipe_resource_reference(&strb->texture, NULL);
 215    strb->width = strb->height = 0;
 216
 217    strb->texture = pt;
 218    strb->surface = screen->get_tex_surface(screen, strb->texture, 0, 0, 0,
 219          PIPE_BIND_RENDER_TARGET |
 220          PIPE_BIND_BLIT_SOURCE |
 221          PIPE_BIND_BLIT_DESTINATION);
 222    if (!strb->surface) {
 223       pipe_resource_reference(&strb->texture, NULL);
 224       return TRUE;
 225    }
 226
 227    strb->width = pt->width0;
 228    strb->height = pt->height0;
 229
 230    return TRUE;
 231 }
 232
 233 static void
 234 vg_context_update_draw_buffer(struct vg_context *ctx, struct pipe_resource *pt)
 235 {
 236    struct st_framebuffer *stfb = ctx->draw_buffer;
 237    boolean new_cbuf, new_zsbuf, new_size;
 238
 239    new_cbuf = vg_context_update_color_rb(ctx, pt);
 240    new_zsbuf =
 241       vg_context_update_depth_stencil_rb(ctx, pt->width0, pt->height0);
 242
 243    new_size = (stfb->width != pt->width0 || stfb->height != pt->height0);
 244    stfb->width = pt->width0;
 245    stfb->height = pt->height0;
 246
 247    if (new_cbuf || new_zsbuf || new_size) {
 248       struct pipe_framebuffer_state *state = &ctx->state.g3d.fb;
 249
 250       memset(state, 0, sizeof(struct pipe_framebuffer_state));
 251       state->width  = stfb->width;
 252       state->height = stfb->height;
 253       state->nr_cbufs = 1;
 254       state->cbufs[0] = stfb->strb->surface;
 255       state->zsbuf = stfb->dsrb->surface;
 256
 257       cso_set_framebuffer(ctx->cso_context, state);
 258    }
 259
 260    if (new_zsbuf || new_size) {
 261       ctx->state.dirty |= VIEWPORT_DIRTY;
 262       ctx->state.dirty |= DEPTH_STENCIL_DIRTY;/*to reset the scissors*/
 263
 264       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 0.0, 0);
 265
 266       /* we need all the other state already set */
 267
 268       setup_new_alpha_mask(ctx, stfb);
 269
 270       pipe_sampler_view_reference( &stfb->blend_texture_view, NULL);
 271       stfb->blend_texture_view = create_tex_and_view(ctx->pipe,
 272             PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 273    }
 274 }
 275
 276 /**
 277  * Flush the front buffer if the current context renders to the front buffer.
 278  */
 279 void
 280 vg_manager_flush_frontbuffer(struct vg_context *ctx)
 281 {
 282    struct st_framebuffer *stfb = ctx->draw_buffer;
 283
 284    if (!stfb)
 285       return;
 286
 287    switch (stfb->strb_att) {
 288    case ST_ATTACHMENT_FRONT_LEFT:
 289    case ST_ATTACHMENT_FRONT_RIGHT:
 290       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
 291       break;
 292    default:
 293       break;
 294    }
 295 }
 296
 297 /**
 298  * Re-validate the framebuffer.
 299  */
 300 void
 301 vg_manager_validate_framebuffer(struct vg_context *ctx)
 302 {
 303    struct st_framebuffer *stfb = ctx->draw_buffer;
 304    struct pipe_resource *pt;
 305
 306    /* no binding surface */
 307    if (!stfb)
 308       return;
 309
 310    if (!p_atomic_read(&ctx->draw_buffer_invalid))
 311       return;
 312
 313    /* validate the fb */
 314    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 315       return;
 316
 317    /*
 318     * unset draw_buffer_invalid first because vg_context_update_draw_buffer
 319     * will cause the framebuffer to be validated again because of a call to
 320     * vg_validate_state
 321     */
 322    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 323    vg_context_update_draw_buffer(ctx, pt);
 324 }
 325
 326
 327 static void
 328 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 329                                       struct st_framebuffer_iface *stfbi)
 330 {
 331    struct vg_context *ctx = (struct vg_context *) stctxi;
 332    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 333 }
 334
 335 static void
 336 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 337                  struct pipe_fence_handle **fence)
 338 {
 339    struct vg_context *ctx = (struct vg_context *) stctxi;
 340    ctx->pipe->flush(ctx->pipe, flags, fence);
 341    if (flags & PIPE_FLUSH_RENDER_CACHE)
 342       vg_manager_flush_frontbuffer(ctx);
 343 }
 344
 345 static void
 346 vg_context_destroy(struct st_context_iface *stctxi)
 347 {
 348    struct vg_context *ctx = (struct vg_context *) stctxi;
 349    vg_destroy_context(ctx);
 350 }
 351
 352 static struct st_context_iface *
 353 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 354                       const struct st_visual *visual,
 355                       struct st_context_iface *shared_stctxi)
 356 {
 357    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 358    struct vg_context *ctx;
 359    struct pipe_context *pipe;
 360
 361    pipe = smapi->screen->context_create(smapi->screen, NULL);
 362    if (!pipe)
 363       return NULL;
 364    ctx = vg_create_context(pipe, NULL, shared_ctx);
 365    if (!ctx) {
 366       pipe->destroy(pipe);
 367       return NULL;
 368    }
 369
 370    ctx->iface.destroy = vg_context_destroy;
 371
 372    ctx->iface.notify_invalid_framebuffer =
 373       vg_context_notify_invalid_framebuffer;
 374    ctx->iface.flush = vg_context_flush;
 375
 376    ctx->iface.teximage = NULL;
 377    ctx->iface.copy = NULL;
 378
 379    ctx->iface.st_context_private = (void *) smapi;
 380
 381    return &ctx->iface;
 382 }
 383
 384 static struct st_renderbuffer *
 385 create_renderbuffer(enum pipe_format format)
 386 {
 387    struct st_renderbuffer *strb;
 388
 389    strb = CALLOC_STRUCT(st_renderbuffer);
 390    if (strb)
 391       strb->format = format;
 392
 393    return strb;
 394 }
 395
 396 static void
 397 destroy_renderbuffer(struct st_renderbuffer *strb)
 398 {
 399    pipe_surface_reference(&strb->surface, NULL);
 400    pipe_resource_reference(&strb->texture, NULL);
 401    free(strb);
 402 }
 403
 404 /**
 405  * Decide the buffer to render to.
 406  */
 407 static enum st_attachment_type
 408 choose_attachment(struct st_framebuffer_iface *stfbi)
 409 {
 410    enum st_attachment_type statt;
 411
 412    statt = stfbi->visual->render_buffer;
 413    if (statt != ST_ATTACHMENT_INVALID) {
 414       /* use the buffer given by the visual, unless it is unavailable */
 415       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 416          switch (statt) {
 417          case ST_ATTACHMENT_BACK_LEFT:
 418             statt = ST_ATTACHMENT_FRONT_LEFT;
 419             break;
 420          case ST_ATTACHMENT_BACK_RIGHT:
 421             statt = ST_ATTACHMENT_FRONT_RIGHT;
 422             break;
 423          default:
 424             break;
 425          }
 426
 427          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 428             statt = ST_ATTACHMENT_INVALID;
 429       }
 430    }
 431
 432    return statt;
 433 }
 434
 435 /**
 436  * Bind the context to the given framebuffers.
 437  */
 438 static boolean
 439 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 440                              struct st_framebuffer_iface *stdrawi,
 441                              struct st_framebuffer_iface *streadi)
 442 {
 443    struct vg_context *ctx = (struct vg_context *) stctxi;
 444    struct st_framebuffer *stfb;
 445    enum st_attachment_type strb_att;
 446
 447    /* the draw and read framebuffers must be the same */
 448    if (stdrawi != streadi)
 449       return FALSE;
 450
 451    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 452
 453    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 454
 455    if (ctx->draw_buffer) {
 456       stfb = ctx->draw_buffer;
 457
 458       /* free the existing fb */
 459       if (!stdrawi ||
 460           stfb->strb_att != strb_att ||
 461           stfb->strb->format != stdrawi->visual->color_format ||
 462           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 463          destroy_renderbuffer(stfb->strb);
 464          destroy_renderbuffer(stfb->dsrb);
 465          free(stfb);
 466
 467          ctx->draw_buffer = NULL;
 468       }
 469    }
 470
 471    if (!stdrawi)
 472       return TRUE;
 473
 474    if (strb_att == ST_ATTACHMENT_INVALID)
 475       return FALSE;
 476
 477    /* create a new fb */
 478    if (!ctx->draw_buffer) {
 479       stfb = CALLOC_STRUCT(st_framebuffer);
 480       if (!stfb)
 481          return FALSE;
 482
 483       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 484       if (!stfb->strb) {
 485          free(stfb);
 486          return FALSE;
 487       }
 488
 489       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 490       if (!stfb->dsrb) {
 491          free(stfb->strb);
 492          free(stfb);
 493          return FALSE;
 494       }
 495
 496       stfb->width = 0;
 497       stfb->height = 0;
 498       stfb->strb_att = strb_att;
 499
 500       ctx->draw_buffer = stfb;
 501    }
 502
 503    ctx->draw_buffer->iface = stdrawi;
 504
 505    return TRUE;
 506 }
 507
 508 static boolean
 509 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 510                     struct st_framebuffer_iface *stdrawi,
 511                     struct st_framebuffer_iface *streadi)
 512 {
 513    struct vg_context *ctx = (struct vg_context *) stctxi;
 514
 515    if (stctxi)
 516       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 517    vg_set_current_context(ctx);
 518
 519    return TRUE;
 520 }
 521
 522 static struct st_context_iface *
 523 vg_api_get_current(struct st_api *stapi)
 524 {
 525    struct vg_context *ctx = vg_current_context();
 526
 527    return (ctx) ? &ctx->iface : NULL;
 528 }
 529
 530 static boolean
 531 vg_api_is_visual_supported(struct st_api *stapi,
 532                            const struct st_visual *visual)
 533 {
 534    /* the impl requires a depth/stencil buffer */
 535    return util_format_is_depth_and_stencil(visual->depth_stencil_format);
 536 }
 537
 538 static st_proc_t
 539 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 540 {
 541    return api_get_proc_address(procname);
 542 }
 543
 544 static void
 545 vg_api_destroy(struct st_api *stapi)
 546 {
 547 }
 548
 549 static const struct st_api vg_api = {
 550    vg_api_destroy,
 551    vg_api_get_proc_address,
 552    vg_api_is_visual_supported,
 553    vg_api_create_context,
 554    vg_api_make_current,
 555    vg_api_get_current,
 556 };
 557
 558 const struct st_api *
 559 vg_api_get(void)
 560 {
 561    return &vg_api;
 562 }