src/gallium/state_trackers/vega/vg_manager.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.9
   4  *
   5  * Copyright (C) 2010 LunarG Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  23  * DEALINGS IN THE SOFTWARE.
  24  *
  25  * Authors:
  26  *    Chia-I Wu <olv@lunarg.com>
  27  */
  28
  29 #include "state_tracker/st_api.h"
  30
  31 #include "pipe/p_context.h"
  32 #include "pipe/p_screen.h"
  33 #include "util/u_memory.h"
  34 #include "util/u_inlines.h"
  35
  36 #include "vg_manager.h"
  37 #include "vg_context.h"
  38 #include "vg_tracker.h" /* for st_resize_framebuffer */
  39 #include "image.h"
  40
  41 /**
  42  * Flush the front buffer if the current context renders to the front buffer.
  43  */
  44 void
  45 vg_manager_flush_frontbuffer(struct vg_context *ctx)
  46 {
  47    struct st_framebuffer *stfb = ctx->draw_buffer;
  48
  49    if (!stfb)
  50       return;
  51
  52    /* st_public.h is used */
  53    if (!stfb->iface) {
  54       struct pipe_screen *screen = ctx->pipe->screen;
  55       if (screen->flush_frontbuffer) {
  56          screen->flush_frontbuffer(screen,
  57                stfb->strb->surface, ctx->pipe->priv);
  58       }
  59       return;
  60    }
  61
  62    switch (stfb->strb_att) {
  63    case ST_ATTACHMENT_FRONT_LEFT:
  64    case ST_ATTACHMENT_FRONT_RIGHT:
  65       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
  66       break;
  67    default:
  68       break;
  69    }
  70 }
  71
  72 /**
  73  * Re-validate the framebuffer.
  74  */
  75 void
  76 vg_manager_validate_framebuffer(struct vg_context *ctx)
  77 {
  78    struct pipe_screen *screen = ctx->pipe->screen;
  79    struct st_framebuffer *stfb = ctx->draw_buffer;
  80    struct st_renderbuffer *rb;
  81    struct pipe_texture *pt;
  82
  83    /* no binding surface */
  84    if (!stfb)
  85       return;
  86
  87    /* st_public.h is used */
  88    if (!stfb->iface) {
  89       struct pipe_screen *screen = ctx->pipe->screen;
  90       if (screen->update_buffer)
  91          screen->update_buffer(screen, ctx->pipe->priv);
  92       return;
  93    }
  94
  95    if (!p_atomic_read(&ctx->draw_buffer_invalid))
  96       return;
  97
  98    /* validate the fb */
  99    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 100       return;
 101
 102    rb = stfb->strb;
 103    if (rb->texture == pt) {
 104       pipe_texture_reference(&pt, NULL);
 105       return;
 106    }
 107
 108    /* unreference existing ones */
 109    pipe_surface_reference(&rb->surface, NULL);
 110    pipe_texture_reference(&rb->texture, NULL);
 111
 112    rb->texture = pt;
 113    rb->surface = screen->get_tex_surface(screen, rb->texture, 0, 0, 0,
 114          PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE);
 115
 116    rb->width = rb->surface->width;
 117    rb->height = rb->surface->height;
 118
 119    st_resize_framebuffer(stfb, rb->width, rb->height);
 120
 121    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 122 }
 123
 124
 125 static void
 126 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 127                                       struct st_framebuffer_iface *stfbi)
 128 {
 129    struct vg_context *ctx = (struct vg_context *) stctxi;
 130    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 131 }
 132
 133 static void
 134 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 135                  struct pipe_fence_handle **fence)
 136 {
 137    struct vg_context *ctx = (struct vg_context *) stctxi;
 138    ctx->pipe->flush(ctx->pipe, flags, fence);
 139    if (flags & PIPE_FLUSH_RENDER_CACHE)
 140       vg_manager_flush_frontbuffer(ctx);
 141 }
 142
 143 static void
 144 vg_context_destroy(struct st_context_iface *stctxi)
 145 {
 146    struct vg_context *ctx = (struct vg_context *) stctxi;
 147    vg_destroy_context(ctx);
 148 }
 149
 150 static struct st_context_iface *
 151 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 152                       const struct st_visual *visual,
 153                       struct st_context_iface *shared_stctxi)
 154 {
 155    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 156    struct vg_context *ctx;
 157    struct pipe_context *pipe;
 158
 159    pipe = smapi->screen->context_create(smapi->screen, NULL);
 160    if (!pipe)
 161       return NULL;
 162    ctx = vg_create_context(pipe, NULL, shared_ctx);
 163    if (!ctx) {
 164       pipe->destroy(pipe);
 165       return NULL;
 166    }
 167
 168    ctx->iface.destroy = vg_context_destroy;
 169
 170    ctx->iface.notify_invalid_framebuffer =
 171       vg_context_notify_invalid_framebuffer;
 172    ctx->iface.flush = vg_context_flush;
 173
 174    ctx->iface.teximage = NULL;
 175    ctx->iface.copy = NULL;
 176
 177    ctx->iface.st_context_private = (void *) smapi;
 178
 179    return &ctx->iface;
 180 }
 181
 182 static struct st_renderbuffer *
 183 create_renderbuffer(enum pipe_format format)
 184 {
 185    struct st_renderbuffer *strb;
 186
 187    strb = CALLOC_STRUCT(st_renderbuffer);
 188    if (strb)
 189       strb->format = format;
 190
 191    return strb;
 192 }
 193
 194 static void
 195 destroy_renderbuffer(struct st_renderbuffer *strb)
 196 {
 197    pipe_surface_reference(&strb->surface, NULL);
 198    pipe_texture_reference(&strb->texture, NULL);
 199    free(strb);
 200 }
 201
 202 /**
 203  * Decide the buffer to render to.
 204  */
 205 static enum st_attachment_type
 206 choose_attachment(struct st_framebuffer_iface *stfbi)
 207 {
 208    enum st_attachment_type statt;
 209
 210    statt = stfbi->visual->render_buffer;
 211    if (statt != ST_ATTACHMENT_INVALID) {
 212       /* use the buffer given by the visual, unless it is unavailable */
 213       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 214          switch (statt) {
 215          case ST_ATTACHMENT_BACK_LEFT:
 216             statt = ST_ATTACHMENT_FRONT_LEFT;
 217             break;
 218          case ST_ATTACHMENT_BACK_RIGHT:
 219             statt = ST_ATTACHMENT_FRONT_RIGHT;
 220             break;
 221          default:
 222             break;
 223          }
 224
 225          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 226             statt = ST_ATTACHMENT_INVALID;
 227       }
 228    }
 229
 230    return statt;
 231 }
 232
 233 /**
 234  * Bind the context to the given framebuffers.
 235  */
 236 static boolean
 237 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 238                              struct st_framebuffer_iface *stdrawi,
 239                              struct st_framebuffer_iface *streadi)
 240 {
 241    struct vg_context *ctx = (struct vg_context *) stctxi;
 242    struct st_framebuffer *stfb;
 243    enum st_attachment_type strb_att;
 244
 245    /* the draw and read framebuffers must be the same */
 246    if (stdrawi != streadi)
 247       return FALSE;
 248
 249    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 250
 251    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 252
 253    if (ctx->draw_buffer) {
 254       stfb = ctx->draw_buffer;
 255
 256       /* free the existing fb */
 257       if (!stdrawi ||
 258           stfb->strb_att != strb_att ||
 259           stfb->strb->format != stdrawi->visual->color_format ||
 260           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 261          destroy_renderbuffer(stfb->strb);
 262          destroy_renderbuffer(stfb->dsrb);
 263          free(stfb);
 264
 265          ctx->draw_buffer = NULL;
 266       }
 267    }
 268
 269    if (!stdrawi)
 270       return TRUE;
 271
 272    if (strb_att == ST_ATTACHMENT_INVALID)
 273       return FALSE;
 274
 275    /* create a new fb */
 276    if (!ctx->draw_buffer) {
 277       stfb = CALLOC_STRUCT(st_framebuffer);
 278       if (!stfb)
 279          return FALSE;
 280
 281       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 282       if (!stfb->strb) {
 283          free(stfb);
 284          return FALSE;
 285       }
 286
 287       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 288       if (!stfb->dsrb) {
 289          free(stfb->strb);
 290          free(stfb);
 291          return FALSE;
 292       }
 293
 294       stfb->width = 0;
 295       stfb->height = 0;
 296       stfb->strb_att = strb_att;
 297
 298       ctx->draw_buffer = stfb;
 299    }
 300
 301    ctx->draw_buffer->iface = stdrawi;
 302
 303    return TRUE;
 304 }
 305
 306 static boolean
 307 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 308                     struct st_framebuffer_iface *stdrawi,
 309                     struct st_framebuffer_iface *streadi)
 310 {
 311    struct vg_context *ctx = (struct vg_context *) stctxi;
 312
 313    if (stctxi)
 314       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 315    vg_set_current_context(ctx);
 316
 317    return TRUE;
 318 }
 319
 320 static struct st_context_iface *
 321 vg_api_get_current(struct st_api *stapi)
 322 {
 323    struct vg_context *ctx = vg_current_context();
 324
 325    return (ctx) ? &ctx->iface : NULL;
 326 }
 327
 328 static boolean
 329 vg_api_is_visual_supported(struct st_api *stapi,
 330                            const struct st_visual *visual)
 331 {
 332    /* the impl requires a depth/stencil buffer */
 333    if (visual->depth_stencil_format == PIPE_FORMAT_NONE)
 334       return FALSE;
 335
 336    return TRUE;
 337 }
 338
 339 static st_proc_t
 340 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 341 {
 342    /* TODO */
 343    return (st_proc_t) NULL;
 344 }
 345
 346 static void
 347 vg_api_destroy(struct st_api *stapi)
 348 {
 349    free(stapi);
 350 }
 351
 352 static struct st_api *
 353 vg_module_create_api(void)
 354 {
 355    struct st_api *stapi;
 356
 357    stapi = CALLOC_STRUCT(st_api);
 358    if (stapi) {
 359       stapi->destroy = vg_api_destroy;
 360       stapi->get_proc_address = vg_api_get_proc_address;
 361       stapi->is_visual_supported = vg_api_is_visual_supported;
 362
 363       stapi->create_context = vg_api_create_context;
 364       stapi->make_current = vg_api_make_current;
 365       stapi->get_current = vg_api_get_current;
 366    }
 367
 368    return stapi;
 369 }
 370
 371 PUBLIC const struct st_module st_module_OpenVG = {
 372    .api = ST_API_OPENVG,
 373    .create_api = vg_module_create_api,
 374 };