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