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_manager.h"
  40 #include "vg_context.h"
  41 #include "image.h"
  42 #include "mask.h"
  43 #include "api.h"
  44
  45 static struct pipe_resource *
  46 create_texture(struct pipe_context *pipe, enum pipe_format format,
  47                     VGint width, VGint height)
  48 {
  49    struct pipe_resource templ;
  50
  51    memset(&templ, 0, sizeof(templ));
  52
  53    if (format != PIPE_FORMAT_NONE) {
  54       templ.format = format;
  55    }
  56    else {
  57       templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
  58    }
  59
  60    templ.target = PIPE_TEXTURE_2D;
  61    templ.width0 = width;
  62    templ.height0 = height;
  63    templ.depth0 = 1;
  64    templ.last_level = 0;
  65
  66    if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
  67       templ.bind = PIPE_BIND_DEPTH_STENCIL;
  68    } else {
  69       templ.bind = (PIPE_BIND_DISPLAY_TARGET |
  70                     PIPE_BIND_RENDER_TARGET |
  71                     PIPE_BIND_SAMPLER_VIEW);
  72    }
  73
  74    return pipe->screen->resource_create(pipe->screen, &templ);
  75 }
  76
  77 static struct pipe_sampler_view *
  78 create_tex_and_view(struct pipe_context *pipe, enum pipe_format format,
  79                     VGint width, VGint height)
  80 {
  81    struct pipe_resource *texture;
  82    struct pipe_sampler_view view_templ;
  83    struct pipe_sampler_view *view;
  84
  85    texture = create_texture(pipe, format, width, height);
  86
  87    if (!texture)
  88       return NULL;
  89
  90    u_sampler_view_default_template(&view_templ, texture, texture->format);
  91    view = pipe->create_sampler_view(pipe, texture, &view_templ);
  92    /* want the texture to go away if the view is freed */
  93    pipe_resource_reference(&texture, NULL);
  94
  95    return view;
  96 }
  97
  98 static void
  99 setup_new_alpha_mask(struct vg_context *ctx, struct st_framebuffer *stfb)
 100 {
 101    struct pipe_context *pipe = ctx->pipe;
 102    struct pipe_sampler_view *old_sampler_view = stfb->alpha_mask_view;
 103
 104    /*
 105      we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
 106      this texture and use it as a sampler, so while this wastes some
 107      space it makes both of those a lot simpler
 108    */
 109    stfb->alpha_mask_view = create_tex_and_view(pipe,
 110          PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 111
 112    if (!stfb->alpha_mask_view) {
 113       if (old_sampler_view)
 114          pipe_sampler_view_reference(&old_sampler_view, NULL);
 115       return;
 116    }
 117
 118    /* XXX could this call be avoided? */
 119    vg_validate_state(ctx);
 120
 121    /* alpha mask starts with 1.f alpha */
 122    mask_fill(0, 0, stfb->width, stfb->height, 1.f);
 123
 124    /* if we had an old surface copy it over */
 125    if (old_sampler_view) {
 126       struct pipe_surface *surface = pipe->screen->get_tex_surface(
 127          pipe->screen,
 128          stfb->alpha_mask_view->texture,
 129          0, 0, 0,
 130          PIPE_BIND_RENDER_TARGET |
 131          PIPE_BIND_BLIT_DESTINATION);
 132       struct pipe_surface *old_surface = pipe->screen->get_tex_surface(
 133          pipe->screen,
 134          old_sampler_view->texture,
 135          0, 0, 0,
 136          PIPE_BIND_BLIT_SOURCE);
 137       pipe->surface_copy(pipe,
 138                          surface,
 139                          0, 0,
 140                          old_surface,
 141                          0, 0,
 142                          MIN2(old_surface->width, surface->width),
 143                          MIN2(old_surface->height, surface->height));
 144       if (surface)
 145          pipe_surface_reference(&surface, NULL);
 146       if (old_surface)
 147          pipe_surface_reference(&old_surface, NULL);
 148    }
 149
 150    /* Free the old texture
 151     */
 152    if (old_sampler_view)
 153       pipe_sampler_view_reference(&old_sampler_view, NULL);
 154 }
 155
 156 static boolean
 157 vg_context_update_depth_stencil_rb(struct vg_context * ctx,
 158                                    uint width, uint height)
 159 {
 160    struct st_renderbuffer *dsrb = ctx->draw_buffer->dsrb;
 161    struct pipe_context *pipe = ctx->pipe;
 162    unsigned surface_usage;
 163
 164    if ((dsrb->width == width && dsrb->height == height) && dsrb->texture)
 165       return FALSE;
 166
 167    /* unreference existing ones */
 168    pipe_surface_reference(&dsrb->surface, NULL);
 169    pipe_resource_reference(&dsrb->texture, NULL);
 170    dsrb->width = dsrb->height = 0;
 171
 172    /* Probably need dedicated flags for surface usage too:
 173     */
 174    surface_usage = (PIPE_BIND_RENDER_TARGET |
 175                     PIPE_BIND_BLIT_SOURCE |
 176                     PIPE_BIND_BLIT_DESTINATION);
 177
 178    dsrb->texture = create_texture(pipe, dsrb->format, width, height);
 179    if (!dsrb->texture)
 180       return TRUE;
 181
 182    dsrb->surface = pipe->screen->get_tex_surface(pipe->screen,
 183                                                  dsrb->texture,
 184                                                  0, 0, 0,
 185                                                  surface_usage);
 186    if (!dsrb->surface) {
 187       pipe_resource_reference(&dsrb->texture, NULL);
 188       return TRUE;
 189    }
 190
 191    dsrb->width = width;
 192    dsrb->height = height;
 193
 194    assert(dsrb->surface->width == width);
 195    assert(dsrb->surface->height == height);
 196
 197    return TRUE;
 198 }
 199
 200 static boolean
 201 vg_context_update_color_rb(struct vg_context *ctx, struct pipe_resource *pt)
 202 {
 203    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 204    struct pipe_screen *screen = ctx->pipe->screen;
 205
 206    if (strb->texture == pt) {
 207       pipe_resource_reference(&pt, NULL);
 208       return FALSE;
 209    }
 210
 211    /* unreference existing ones */
 212    pipe_surface_reference(&strb->surface, NULL);
 213    pipe_resource_reference(&strb->texture, NULL);
 214    strb->width = strb->height = 0;
 215
 216    strb->texture = pt;
 217    strb->surface = screen->get_tex_surface(screen, strb->texture, 0, 0, 0,
 218          PIPE_BIND_RENDER_TARGET |
 219          PIPE_BIND_BLIT_SOURCE |
 220          PIPE_BIND_BLIT_DESTINATION);
 221    if (!strb->surface) {
 222       pipe_resource_reference(&strb->texture, NULL);
 223       return TRUE;
 224    }
 225
 226    strb->width = pt->width0;
 227    strb->height = pt->height0;
 228
 229    return TRUE;
 230 }
 231
 232 static void
 233 vg_context_update_draw_buffer(struct vg_context *ctx, struct pipe_resource *pt)
 234 {
 235    struct st_framebuffer *stfb = ctx->draw_buffer;
 236    boolean new_cbuf, new_zsbuf, new_size;
 237
 238    new_cbuf = vg_context_update_color_rb(ctx, pt);
 239    new_zsbuf =
 240       vg_context_update_depth_stencil_rb(ctx, pt->width0, pt->height0);
 241
 242    new_size = (stfb->width != pt->width0 || stfb->height != pt->height0);
 243    stfb->width = pt->width0;
 244    stfb->height = pt->height0;
 245
 246    if (new_cbuf || new_zsbuf || new_size) {
 247       struct pipe_framebuffer_state *state = &ctx->state.g3d.fb;
 248
 249       memset(state, 0, sizeof(struct pipe_framebuffer_state));
 250       state->width  = stfb->width;
 251       state->height = stfb->height;
 252       state->nr_cbufs = 1;
 253       state->cbufs[0] = stfb->strb->surface;
 254       state->zsbuf = stfb->dsrb->surface;
 255
 256       cso_set_framebuffer(ctx->cso_context, state);
 257    }
 258
 259    if (new_zsbuf || new_size) {
 260       ctx->state.dirty |= VIEWPORT_DIRTY;
 261       ctx->state.dirty |= DEPTH_STENCIL_DIRTY;/*to reset the scissors*/
 262
 263       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 0.0, 0);
 264
 265       /* we need all the other state already set */
 266
 267       setup_new_alpha_mask(ctx, stfb);
 268
 269       pipe_sampler_view_reference( &stfb->blend_texture_view, NULL);
 270       stfb->blend_texture_view = create_tex_and_view(ctx->pipe,
 271             PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 272    }
 273 }
 274
 275 /**
 276  * Flush the front buffer if the current context renders to the front buffer.
 277  */
 278 void
 279 vg_manager_flush_frontbuffer(struct vg_context *ctx)
 280 {
 281    struct st_framebuffer *stfb = ctx->draw_buffer;
 282
 283    if (!stfb)
 284       return;
 285
 286    switch (stfb->strb_att) {
 287    case ST_ATTACHMENT_FRONT_LEFT:
 288    case ST_ATTACHMENT_FRONT_RIGHT:
 289       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
 290       break;
 291    default:
 292       break;
 293    }
 294 }
 295
 296 /**
 297  * Re-validate the framebuffer.
 298  */
 299 void
 300 vg_manager_validate_framebuffer(struct vg_context *ctx)
 301 {
 302    struct st_framebuffer *stfb = ctx->draw_buffer;
 303    struct pipe_resource *pt;
 304
 305    /* no binding surface */
 306    if (!stfb)
 307       return;
 308
 309    if (!p_atomic_read(&ctx->draw_buffer_invalid))
 310       return;
 311
 312    /* validate the fb */
 313    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 314       return;
 315
 316    /*
 317     * unset draw_buffer_invalid first because vg_context_update_draw_buffer
 318     * will cause the framebuffer to be validated again because of a call to
 319     * vg_validate_state
 320     */
 321    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 322    vg_context_update_draw_buffer(ctx, pt);
 323 }
 324
 325
 326 static void
 327 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 328                                       struct st_framebuffer_iface *stfbi)
 329 {
 330    struct vg_context *ctx = (struct vg_context *) stctxi;
 331    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 332 }
 333
 334 static void
 335 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 336                  struct pipe_fence_handle **fence)
 337 {
 338    struct vg_context *ctx = (struct vg_context *) stctxi;
 339    ctx->pipe->flush(ctx->pipe, flags, fence);
 340    if (flags & PIPE_FLUSH_RENDER_CACHE)
 341       vg_manager_flush_frontbuffer(ctx);
 342 }
 343
 344 static void
 345 vg_context_destroy(struct st_context_iface *stctxi)
 346 {
 347    struct vg_context *ctx = (struct vg_context *) stctxi;
 348    vg_destroy_context(ctx);
 349 }
 350
 351 static struct st_context_iface *
 352 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 353                       const struct st_visual *visual,
 354                       struct st_context_iface *shared_stctxi)
 355 {
 356    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 357    struct vg_context *ctx;
 358    struct pipe_context *pipe;
 359
 360    pipe = smapi->screen->context_create(smapi->screen, NULL);
 361    if (!pipe)
 362       return NULL;
 363    ctx = vg_create_context(pipe, NULL, shared_ctx);
 364    if (!ctx) {
 365       pipe->destroy(pipe);
 366       return NULL;
 367    }
 368
 369    ctx->iface.destroy = vg_context_destroy;
 370
 371    ctx->iface.notify_invalid_framebuffer =
 372       vg_context_notify_invalid_framebuffer;
 373    ctx->iface.flush = vg_context_flush;
 374
 375    ctx->iface.teximage = NULL;
 376    ctx->iface.copy = NULL;
 377
 378    ctx->iface.st_context_private = (void *) smapi;
 379
 380    return &ctx->iface;
 381 }
 382
 383 static struct st_renderbuffer *
 384 create_renderbuffer(enum pipe_format format)
 385 {
 386    struct st_renderbuffer *strb;
 387
 388    strb = CALLOC_STRUCT(st_renderbuffer);
 389    if (strb)
 390       strb->format = format;
 391
 392    return strb;
 393 }
 394
 395 static void
 396 destroy_renderbuffer(struct st_renderbuffer *strb)
 397 {
 398    pipe_surface_reference(&strb->surface, NULL);
 399    pipe_resource_reference(&strb->texture, NULL);
 400    free(strb);
 401 }
 402
 403 /**
 404  * Decide the buffer to render to.
 405  */
 406 static enum st_attachment_type
 407 choose_attachment(struct st_framebuffer_iface *stfbi)
 408 {
 409    enum st_attachment_type statt;
 410
 411    statt = stfbi->visual->render_buffer;
 412    if (statt != ST_ATTACHMENT_INVALID) {
 413       /* use the buffer given by the visual, unless it is unavailable */
 414       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 415          switch (statt) {
 416          case ST_ATTACHMENT_BACK_LEFT:
 417             statt = ST_ATTACHMENT_FRONT_LEFT;
 418             break;
 419          case ST_ATTACHMENT_BACK_RIGHT:
 420             statt = ST_ATTACHMENT_FRONT_RIGHT;
 421             break;
 422          default:
 423             break;
 424          }
 425
 426          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 427             statt = ST_ATTACHMENT_INVALID;
 428       }
 429    }
 430
 431    return statt;
 432 }
 433
 434 /**
 435  * Bind the context to the given framebuffers.
 436  */
 437 static boolean
 438 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 439                              struct st_framebuffer_iface *stdrawi,
 440                              struct st_framebuffer_iface *streadi)
 441 {
 442    struct vg_context *ctx = (struct vg_context *) stctxi;
 443    struct st_framebuffer *stfb;
 444    enum st_attachment_type strb_att;
 445
 446    /* the draw and read framebuffers must be the same */
 447    if (stdrawi != streadi)
 448       return FALSE;
 449
 450    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 451
 452    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 453
 454    if (ctx->draw_buffer) {
 455       stfb = ctx->draw_buffer;
 456
 457       /* free the existing fb */
 458       if (!stdrawi ||
 459           stfb->strb_att != strb_att ||
 460           stfb->strb->format != stdrawi->visual->color_format ||
 461           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 462          destroy_renderbuffer(stfb->strb);
 463          destroy_renderbuffer(stfb->dsrb);
 464          free(stfb);
 465
 466          ctx->draw_buffer = NULL;
 467       }
 468    }
 469
 470    if (!stdrawi)
 471       return TRUE;
 472
 473    if (strb_att == ST_ATTACHMENT_INVALID)
 474       return FALSE;
 475
 476    /* create a new fb */
 477    if (!ctx->draw_buffer) {
 478       stfb = CALLOC_STRUCT(st_framebuffer);
 479       if (!stfb)
 480          return FALSE;
 481
 482       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 483       if (!stfb->strb) {
 484          free(stfb);
 485          return FALSE;
 486       }
 487
 488       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 489       if (!stfb->dsrb) {
 490          free(stfb->strb);
 491          free(stfb);
 492          return FALSE;
 493       }
 494
 495       stfb->width = 0;
 496       stfb->height = 0;
 497       stfb->strb_att = strb_att;
 498
 499       ctx->draw_buffer = stfb;
 500    }
 501
 502    ctx->draw_buffer->iface = stdrawi;
 503
 504    return TRUE;
 505 }
 506
 507 static boolean
 508 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 509                     struct st_framebuffer_iface *stdrawi,
 510                     struct st_framebuffer_iface *streadi)
 511 {
 512    struct vg_context *ctx = (struct vg_context *) stctxi;
 513
 514    if (stctxi)
 515       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 516    vg_set_current_context(ctx);
 517
 518    return TRUE;
 519 }
 520
 521 static struct st_context_iface *
 522 vg_api_get_current(struct st_api *stapi)
 523 {
 524    struct vg_context *ctx = vg_current_context();
 525
 526    return (ctx) ? &ctx->iface : NULL;
 527 }
 528
 529 static boolean
 530 vg_api_is_visual_supported(struct st_api *stapi,
 531                            const struct st_visual *visual)
 532 {
 533    /* the impl requires a depth/stencil buffer */
 534    return util_format_is_depth_and_stencil(visual->depth_stencil_format);
 535 }
 536
 537 static st_proc_t
 538 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 539 {
 540    return api_get_proc_address(procname);
 541 }
 542
 543 static void
 544 vg_api_destroy(struct st_api *stapi)
 545 {
 546    free(stapi);
 547 }
 548
 549 struct st_api st_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 struct st_api *
 559 st_api_create_OpenVG(void)
 560 {
 561    return &st_vg_api;
 562 }