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
  44 static struct pipe_resource *
  45 create_texture(struct pipe_context *pipe, enum pipe_format format,
  46                     VGint width, VGint height)
  47 {
  48    struct pipe_resource templ;
  49
  50    memset(&templ, 0, sizeof(templ));
  51
  52    if (format != PIPE_FORMAT_NONE) {
  53       templ.format = format;
  54    }
  55    else {
  56       templ.format = PIPE_FORMAT_B8G8R8A8_UNORM;
  57    }
  58
  59    templ.target = PIPE_TEXTURE_2D;
  60    templ.width0 = width;
  61    templ.height0 = height;
  62    templ.depth0 = 1;
  63    templ.last_level = 0;
  64
  65    if (util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1)) {
  66       templ.bind = PIPE_BIND_DEPTH_STENCIL;
  67    } else {
  68       templ.bind = (PIPE_BIND_DISPLAY_TARGET |
  69                     PIPE_BIND_RENDER_TARGET |
  70                     PIPE_BIND_SAMPLER_VIEW);
  71    }
  72
  73    return pipe->screen->resource_create(pipe->screen, &templ);
  74 }
  75
  76 static struct pipe_sampler_view *
  77 create_tex_and_view(struct pipe_context *pipe, enum pipe_format format,
  78                     VGint width, VGint height)
  79 {
  80    struct pipe_resource *texture;
  81    struct pipe_sampler_view view_templ;
  82    struct pipe_sampler_view *view;
  83
  84    texture = create_texture(pipe, format, width, height);
  85
  86    if (!texture)
  87       return NULL;
  88
  89    u_sampler_view_default_template(&view_templ, texture, texture->format);
  90    view = pipe->create_sampler_view(pipe, texture, &view_templ);
  91    /* want the texture to go away if the view is freed */
  92    pipe_resource_reference(&texture, NULL);
  93
  94    return view;
  95 }
  96
  97 static void
  98 setup_new_alpha_mask(struct vg_context *ctx, struct st_framebuffer *stfb)
  99 {
 100    struct pipe_context *pipe = ctx->pipe;
 101    struct pipe_sampler_view *old_sampler_view = stfb->alpha_mask_view;
 102
 103    /*
 104      we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
 105      this texture and use it as a sampler, so while this wastes some
 106      space it makes both of those a lot simpler
 107    */
 108    stfb->alpha_mask_view = create_tex_and_view(pipe,
 109          PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 110
 111    if (!stfb->alpha_mask_view) {
 112       if (old_sampler_view)
 113          pipe_sampler_view_reference(&old_sampler_view, NULL);
 114       return;
 115    }
 116
 117    /* XXX could this call be avoided? */
 118    vg_validate_state(ctx);
 119
 120    /* alpha mask starts with 1.f alpha */
 121    mask_fill(0, 0, stfb->width, stfb->height, 1.f);
 122
 123    /* if we had an old surface copy it over */
 124    if (old_sampler_view) {
 125       struct pipe_surface *surface = pipe->screen->get_tex_surface(
 126          pipe->screen,
 127          stfb->alpha_mask_view->texture,
 128          0, 0, 0,
 129          PIPE_BIND_RENDER_TARGET |
 130          PIPE_BIND_BLIT_DESTINATION);
 131       struct pipe_surface *old_surface = pipe->screen->get_tex_surface(
 132          pipe->screen,
 133          old_sampler_view->texture,
 134          0, 0, 0,
 135          PIPE_BIND_BLIT_SOURCE);
 136       pipe->surface_copy(pipe,
 137                          surface,
 138                          0, 0,
 139                          old_surface,
 140                          0, 0,
 141                          MIN2(old_surface->width, surface->width),
 142                          MIN2(old_surface->height, surface->height));
 143       if (surface)
 144          pipe_surface_reference(&surface, NULL);
 145       if (old_surface)
 146          pipe_surface_reference(&old_surface, NULL);
 147    }
 148
 149    /* Free the old texture
 150     */
 151    if (old_sampler_view)
 152       pipe_sampler_view_reference(&old_sampler_view, NULL);
 153 }
 154
 155 static boolean
 156 vg_context_update_depth_stencil_rb(struct vg_context * ctx,
 157                                    uint width, uint height)
 158 {
 159    struct st_renderbuffer *dsrb = ctx->draw_buffer->dsrb;
 160    struct pipe_context *pipe = ctx->pipe;
 161    unsigned surface_usage;
 162
 163    if ((dsrb->width == width && dsrb->height == height) && dsrb->texture)
 164       return FALSE;
 165
 166    /* unreference existing ones */
 167    pipe_surface_reference(&dsrb->surface, NULL);
 168    pipe_resource_reference(&dsrb->texture, NULL);
 169    dsrb->width = dsrb->height = 0;
 170
 171    /* Probably need dedicated flags for surface usage too:
 172     */
 173    surface_usage = (PIPE_BIND_RENDER_TARGET |
 174                     PIPE_BIND_BLIT_SOURCE |
 175                     PIPE_BIND_BLIT_DESTINATION);
 176
 177    dsrb->texture = create_texture(pipe, dsrb->format, width, height);
 178    if (!dsrb->texture)
 179       return TRUE;
 180
 181    dsrb->surface = pipe->screen->get_tex_surface(pipe->screen,
 182                                                  dsrb->texture,
 183                                                  0, 0, 0,
 184                                                  surface_usage);
 185    if (!dsrb->surface) {
 186       pipe_resource_reference(&dsrb->texture, NULL);
 187       return TRUE;
 188    }
 189
 190    dsrb->width = width;
 191    dsrb->height = height;
 192
 193    assert(dsrb->surface->width == width);
 194    assert(dsrb->surface->height == height);
 195
 196    return TRUE;
 197 }
 198
 199 static boolean
 200 vg_context_update_color_rb(struct vg_context *ctx, struct pipe_resource *pt)
 201 {
 202    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
 203    struct pipe_screen *screen = ctx->pipe->screen;
 204
 205    if (strb->texture == pt) {
 206       pipe_resource_reference(&pt, NULL);
 207       return FALSE;
 208    }
 209
 210    /* unreference existing ones */
 211    pipe_surface_reference(&strb->surface, NULL);
 212    pipe_resource_reference(&strb->texture, NULL);
 213    strb->width = strb->height = 0;
 214
 215    strb->texture = pt;
 216    strb->surface = screen->get_tex_surface(screen, strb->texture, 0, 0, 0,
 217          PIPE_BIND_RENDER_TARGET |
 218          PIPE_BIND_BLIT_SOURCE |
 219          PIPE_BIND_BLIT_DESTINATION);
 220    if (!strb->surface) {
 221       pipe_resource_reference(&strb->texture, NULL);
 222       return TRUE;
 223    }
 224
 225    strb->width = pt->width0;
 226    strb->height = pt->height0;
 227
 228    return TRUE;
 229 }
 230
 231 static void
 232 vg_context_update_draw_buffer(struct vg_context *ctx, struct pipe_resource *pt)
 233 {
 234    struct st_framebuffer *stfb = ctx->draw_buffer;
 235    boolean new_cbuf, new_zsbuf, new_size;
 236
 237    new_cbuf = vg_context_update_color_rb(ctx, pt);
 238    new_zsbuf =
 239       vg_context_update_depth_stencil_rb(ctx, pt->width0, pt->height0);
 240
 241    new_size = (stfb->width != pt->width0 || stfb->height != pt->height0);
 242    stfb->width = pt->width0;
 243    stfb->height = pt->height0;
 244
 245    if (new_cbuf || new_zsbuf || new_size) {
 246       struct pipe_framebuffer_state *state = &ctx->state.g3d.fb;
 247
 248       memset(state, 0, sizeof(struct pipe_framebuffer_state));
 249       state->width  = stfb->width;
 250       state->height = stfb->height;
 251       state->nr_cbufs = 1;
 252       state->cbufs[0] = stfb->strb->surface;
 253       state->zsbuf = stfb->dsrb->surface;
 254
 255       cso_set_framebuffer(ctx->cso_context, state);
 256    }
 257
 258    if (new_zsbuf || new_size) {
 259       ctx->state.dirty |= VIEWPORT_DIRTY;
 260       ctx->state.dirty |= DEPTH_STENCIL_DIRTY;/*to reset the scissors*/
 261
 262       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 0.0, 0);
 263
 264       /* we need all the other state already set */
 265
 266       setup_new_alpha_mask(ctx, stfb);
 267
 268       pipe_sampler_view_reference( &stfb->blend_texture_view, NULL);
 269       stfb->blend_texture_view = create_tex_and_view(ctx->pipe,
 270             PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
 271    }
 272 }
 273
 274 /**
 275  * Flush the front buffer if the current context renders to the front buffer.
 276  */
 277 void
 278 vg_manager_flush_frontbuffer(struct vg_context *ctx)
 279 {
 280    struct st_framebuffer *stfb = ctx->draw_buffer;
 281
 282    if (!stfb)
 283       return;
 284
 285    switch (stfb->strb_att) {
 286    case ST_ATTACHMENT_FRONT_LEFT:
 287    case ST_ATTACHMENT_FRONT_RIGHT:
 288       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
 289       break;
 290    default:
 291       break;
 292    }
 293 }
 294
 295 /**
 296  * Re-validate the framebuffer.
 297  */
 298 void
 299 vg_manager_validate_framebuffer(struct vg_context *ctx)
 300 {
 301    struct st_framebuffer *stfb = ctx->draw_buffer;
 302    struct pipe_resource *pt;
 303
 304    /* no binding surface */
 305    if (!stfb)
 306       return;
 307
 308    if (!p_atomic_read(&ctx->draw_buffer_invalid))
 309       return;
 310
 311    /* validate the fb */
 312    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 313       return;
 314
 315    /*
 316     * unset draw_buffer_invalid first because vg_context_update_draw_buffer
 317     * will cause the framebuffer to be validated again because of a call to
 318     * vg_validate_state
 319     */
 320    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 321    vg_context_update_draw_buffer(ctx, pt);
 322 }
 323
 324
 325 static void
 326 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 327                                       struct st_framebuffer_iface *stfbi)
 328 {
 329    struct vg_context *ctx = (struct vg_context *) stctxi;
 330    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 331 }
 332
 333 static void
 334 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 335                  struct pipe_fence_handle **fence)
 336 {
 337    struct vg_context *ctx = (struct vg_context *) stctxi;
 338    ctx->pipe->flush(ctx->pipe, flags, fence);
 339    if (flags & PIPE_FLUSH_RENDER_CACHE)
 340       vg_manager_flush_frontbuffer(ctx);
 341 }
 342
 343 static void
 344 vg_context_destroy(struct st_context_iface *stctxi)
 345 {
 346    struct vg_context *ctx = (struct vg_context *) stctxi;
 347    vg_destroy_context(ctx);
 348 }
 349
 350 static struct st_context_iface *
 351 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 352                       const struct st_visual *visual,
 353                       struct st_context_iface *shared_stctxi)
 354 {
 355    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 356    struct vg_context *ctx;
 357    struct pipe_context *pipe;
 358
 359    pipe = smapi->screen->context_create(smapi->screen, NULL);
 360    if (!pipe)
 361       return NULL;
 362    ctx = vg_create_context(pipe, NULL, shared_ctx);
 363    if (!ctx) {
 364       pipe->destroy(pipe);
 365       return NULL;
 366    }
 367
 368    ctx->iface.destroy = vg_context_destroy;
 369
 370    ctx->iface.notify_invalid_framebuffer =
 371       vg_context_notify_invalid_framebuffer;
 372    ctx->iface.flush = vg_context_flush;
 373
 374    ctx->iface.teximage = NULL;
 375    ctx->iface.copy = NULL;
 376
 377    ctx->iface.st_context_private = (void *) smapi;
 378
 379    return &ctx->iface;
 380 }
 381
 382 static struct st_renderbuffer *
 383 create_renderbuffer(enum pipe_format format)
 384 {
 385    struct st_renderbuffer *strb;
 386
 387    strb = CALLOC_STRUCT(st_renderbuffer);
 388    if (strb)
 389       strb->format = format;
 390
 391    return strb;
 392 }
 393
 394 static void
 395 destroy_renderbuffer(struct st_renderbuffer *strb)
 396 {
 397    pipe_surface_reference(&strb->surface, NULL);
 398    pipe_resource_reference(&strb->texture, NULL);
 399    free(strb);
 400 }
 401
 402 /**
 403  * Decide the buffer to render to.
 404  */
 405 static enum st_attachment_type
 406 choose_attachment(struct st_framebuffer_iface *stfbi)
 407 {
 408    enum st_attachment_type statt;
 409
 410    statt = stfbi->visual->render_buffer;
 411    if (statt != ST_ATTACHMENT_INVALID) {
 412       /* use the buffer given by the visual, unless it is unavailable */
 413       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 414          switch (statt) {
 415          case ST_ATTACHMENT_BACK_LEFT:
 416             statt = ST_ATTACHMENT_FRONT_LEFT;
 417             break;
 418          case ST_ATTACHMENT_BACK_RIGHT:
 419             statt = ST_ATTACHMENT_FRONT_RIGHT;
 420             break;
 421          default:
 422             break;
 423          }
 424
 425          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 426             statt = ST_ATTACHMENT_INVALID;
 427       }
 428    }
 429
 430    return statt;
 431 }
 432
 433 /**
 434  * Bind the context to the given framebuffers.
 435  */
 436 static boolean
 437 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 438                              struct st_framebuffer_iface *stdrawi,
 439                              struct st_framebuffer_iface *streadi)
 440 {
 441    struct vg_context *ctx = (struct vg_context *) stctxi;
 442    struct st_framebuffer *stfb;
 443    enum st_attachment_type strb_att;
 444
 445    /* the draw and read framebuffers must be the same */
 446    if (stdrawi != streadi)
 447       return FALSE;
 448
 449    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 450
 451    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 452
 453    if (ctx->draw_buffer) {
 454       stfb = ctx->draw_buffer;
 455
 456       /* free the existing fb */
 457       if (!stdrawi ||
 458           stfb->strb_att != strb_att ||
 459           stfb->strb->format != stdrawi->visual->color_format ||
 460           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 461          destroy_renderbuffer(stfb->strb);
 462          destroy_renderbuffer(stfb->dsrb);
 463          free(stfb);
 464
 465          ctx->draw_buffer = NULL;
 466       }
 467    }
 468
 469    if (!stdrawi)
 470       return TRUE;
 471
 472    if (strb_att == ST_ATTACHMENT_INVALID)
 473       return FALSE;
 474
 475    /* create a new fb */
 476    if (!ctx->draw_buffer) {
 477       stfb = CALLOC_STRUCT(st_framebuffer);
 478       if (!stfb)
 479          return FALSE;
 480
 481       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 482       if (!stfb->strb) {
 483          free(stfb);
 484          return FALSE;
 485       }
 486
 487       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 488       if (!stfb->dsrb) {
 489          free(stfb->strb);
 490          free(stfb);
 491          return FALSE;
 492       }
 493
 494       stfb->width = 0;
 495       stfb->height = 0;
 496       stfb->strb_att = strb_att;
 497
 498       ctx->draw_buffer = stfb;
 499    }
 500
 501    ctx->draw_buffer->iface = stdrawi;
 502
 503    return TRUE;
 504 }
 505
 506 static boolean
 507 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 508                     struct st_framebuffer_iface *stdrawi,
 509                     struct st_framebuffer_iface *streadi)
 510 {
 511    struct vg_context *ctx = (struct vg_context *) stctxi;
 512
 513    if (stctxi)
 514       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 515    vg_set_current_context(ctx);
 516
 517    return TRUE;
 518 }
 519
 520 static struct st_context_iface *
 521 vg_api_get_current(struct st_api *stapi)
 522 {
 523    struct vg_context *ctx = vg_current_context();
 524
 525    return (ctx) ? &ctx->iface : NULL;
 526 }
 527
 528 static boolean
 529 vg_api_is_visual_supported(struct st_api *stapi,
 530                            const struct st_visual *visual)
 531 {
 532    /* the impl requires a depth/stencil buffer */
 533    return util_format_is_depth_and_stencil(visual->depth_stencil_format);
 534 }
 535
 536 static st_proc_t
 537 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 538 {
 539    /* TODO */
 540    return (st_proc_t) NULL;
 541 }
 542
 543 static void
 544 vg_api_destroy(struct st_api *stapi)
 545 {
 546    free(stapi);
 547 }
 548
 549 static struct st_api *
 550 vg_module_create_api(void)
 551 {
 552    struct st_api *stapi;
 553
 554    stapi = CALLOC_STRUCT(st_api);
 555    if (stapi) {
 556       stapi->destroy = vg_api_destroy;
 557       stapi->get_proc_address = vg_api_get_proc_address;
 558       stapi->is_visual_supported = vg_api_is_visual_supported;
 559
 560       stapi->create_context = vg_api_create_context;
 561       stapi->make_current = vg_api_make_current;
 562       stapi->get_current = vg_api_get_current;
 563    }
 564
 565    return stapi;
 566 }
 567
 568 PUBLIC const struct st_module st_module_OpenVG = {
 569    .api = ST_API_OPENVG,
 570    .create_api = vg_module_create_api,
 571 };