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 #include "util/u_format.h"
  36
  37 #include "vg_manager.h"
  38 #include "vg_context.h"
  39 #include "vg_tracker.h" /* for st_resize_framebuffer */
  40 #include "image.h"
  41
  42 /**
  43  * Flush the front buffer if the current context renders to the front buffer.
  44  */
  45 void
  46 vg_manager_flush_frontbuffer(struct vg_context *ctx)
  47 {
  48    struct st_framebuffer *stfb = ctx->draw_buffer;
  49
  50    if (!stfb)
  51       return;
  52
  53    /* st_public.h is used */
  54    if (!stfb->iface) {
  55       struct pipe_screen *screen = ctx->pipe->screen;
  56       if (screen->flush_frontbuffer) {
  57          screen->flush_frontbuffer(screen,
  58                stfb->strb->surface, ctx->pipe->priv);
  59       }
  60       return;
  61    }
  62
  63    switch (stfb->strb_att) {
  64    case ST_ATTACHMENT_FRONT_LEFT:
  65    case ST_ATTACHMENT_FRONT_RIGHT:
  66       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
  67       break;
  68    default:
  69       break;
  70    }
  71 }
  72
  73 /**
  74  * Re-validate the framebuffer.
  75  */
  76 void
  77 vg_manager_validate_framebuffer(struct vg_context *ctx)
  78 {
  79    struct pipe_screen *screen = ctx->pipe->screen;
  80    struct st_framebuffer *stfb = ctx->draw_buffer;
  81    struct st_renderbuffer *rb;
  82    struct pipe_resource *pt;
  83
  84    /* no binding surface */
  85    if (!stfb)
  86       return;
  87
  88    /* st_public.h is used */
  89    if (!stfb->iface) {
  90       struct pipe_screen *screen = ctx->pipe->screen;
  91       if (screen->update_buffer)
  92          screen->update_buffer(screen, ctx->pipe->priv);
  93       return;
  94    }
  95
  96    if (!p_atomic_read(&ctx->draw_buffer_invalid))
  97       return;
  98
  99    /* validate the fb */
 100    if (!stfb->iface->validate(stfb->iface, &stfb->strb_att, 1, &pt) || !pt)
 101       return;
 102
 103    rb = stfb->strb;
 104    if (rb->texture == pt) {
 105       pipe_resource_reference(&pt, NULL);
 106       return;
 107    }
 108
 109    /* unreference existing ones */
 110    pipe_surface_reference(&rb->surface, NULL);
 111    pipe_resource_reference(&rb->texture, NULL);
 112
 113    rb->texture = pt;
 114    rb->surface = screen->get_tex_surface(screen, rb->texture, 0, 0, 0,
 115                                          PIPE_BIND_RENDER_TARGET |
 116                                          PIPE_BIND_BLIT_SOURCE |
 117                                          PIPE_BIND_BLIT_DESTINATION);
 118
 119    rb->width = rb->surface->width;
 120    rb->height = rb->surface->height;
 121
 122    st_resize_framebuffer(stfb, rb->width, rb->height);
 123
 124    p_atomic_set(&ctx->draw_buffer_invalid, FALSE);
 125 }
 126
 127
 128 static void
 129 vg_context_notify_invalid_framebuffer(struct st_context_iface *stctxi,
 130                                       struct st_framebuffer_iface *stfbi)
 131 {
 132    struct vg_context *ctx = (struct vg_context *) stctxi;
 133    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 134 }
 135
 136 static void
 137 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 138                  struct pipe_fence_handle **fence)
 139 {
 140    struct vg_context *ctx = (struct vg_context *) stctxi;
 141    ctx->pipe->flush(ctx->pipe, flags, fence);
 142    if (flags & PIPE_FLUSH_RENDER_CACHE)
 143       vg_manager_flush_frontbuffer(ctx);
 144 }
 145
 146 static void
 147 vg_context_destroy(struct st_context_iface *stctxi)
 148 {
 149    struct vg_context *ctx = (struct vg_context *) stctxi;
 150    vg_destroy_context(ctx);
 151 }
 152
 153 static struct st_context_iface *
 154 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 155                       const struct st_visual *visual,
 156                       struct st_context_iface *shared_stctxi)
 157 {
 158    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 159    struct vg_context *ctx;
 160    struct pipe_context *pipe;
 161
 162    pipe = smapi->screen->context_create(smapi->screen, NULL);
 163    if (!pipe)
 164       return NULL;
 165    ctx = vg_create_context(pipe, NULL, shared_ctx);
 166    if (!ctx) {
 167       pipe->destroy(pipe);
 168       return NULL;
 169    }
 170
 171    ctx->iface.destroy = vg_context_destroy;
 172
 173    ctx->iface.notify_invalid_framebuffer =
 174       vg_context_notify_invalid_framebuffer;
 175    ctx->iface.flush = vg_context_flush;
 176
 177    ctx->iface.teximage = NULL;
 178    ctx->iface.copy = NULL;
 179
 180    ctx->iface.st_context_private = (void *) smapi;
 181
 182    return &ctx->iface;
 183 }
 184
 185 static struct st_renderbuffer *
 186 create_renderbuffer(enum pipe_format format)
 187 {
 188    struct st_renderbuffer *strb;
 189
 190    strb = CALLOC_STRUCT(st_renderbuffer);
 191    if (strb)
 192       strb->format = format;
 193
 194    return strb;
 195 }
 196
 197 static void
 198 destroy_renderbuffer(struct st_renderbuffer *strb)
 199 {
 200    pipe_surface_reference(&strb->surface, NULL);
 201    pipe_resource_reference(&strb->texture, NULL);
 202    free(strb);
 203 }
 204
 205 /**
 206  * Decide the buffer to render to.
 207  */
 208 static enum st_attachment_type
 209 choose_attachment(struct st_framebuffer_iface *stfbi)
 210 {
 211    enum st_attachment_type statt;
 212
 213    statt = stfbi->visual->render_buffer;
 214    if (statt != ST_ATTACHMENT_INVALID) {
 215       /* use the buffer given by the visual, unless it is unavailable */
 216       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 217          switch (statt) {
 218          case ST_ATTACHMENT_BACK_LEFT:
 219             statt = ST_ATTACHMENT_FRONT_LEFT;
 220             break;
 221          case ST_ATTACHMENT_BACK_RIGHT:
 222             statt = ST_ATTACHMENT_FRONT_RIGHT;
 223             break;
 224          default:
 225             break;
 226          }
 227
 228          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 229             statt = ST_ATTACHMENT_INVALID;
 230       }
 231    }
 232
 233    return statt;
 234 }
 235
 236 /**
 237  * Bind the context to the given framebuffers.
 238  */
 239 static boolean
 240 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 241                              struct st_framebuffer_iface *stdrawi,
 242                              struct st_framebuffer_iface *streadi)
 243 {
 244    struct vg_context *ctx = (struct vg_context *) stctxi;
 245    struct st_framebuffer *stfb;
 246    enum st_attachment_type strb_att;
 247
 248    /* the draw and read framebuffers must be the same */
 249    if (stdrawi != streadi)
 250       return FALSE;
 251
 252    p_atomic_set(&ctx->draw_buffer_invalid, TRUE);
 253
 254    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 255
 256    if (ctx->draw_buffer) {
 257       stfb = ctx->draw_buffer;
 258
 259       /* free the existing fb */
 260       if (!stdrawi ||
 261           stfb->strb_att != strb_att ||
 262           stfb->strb->format != stdrawi->visual->color_format ||
 263           stfb->dsrb->format != stdrawi->visual->depth_stencil_format) {
 264          destroy_renderbuffer(stfb->strb);
 265          destroy_renderbuffer(stfb->dsrb);
 266          free(stfb);
 267
 268          ctx->draw_buffer = NULL;
 269       }
 270    }
 271
 272    if (!stdrawi)
 273       return TRUE;
 274
 275    if (strb_att == ST_ATTACHMENT_INVALID)
 276       return FALSE;
 277
 278    /* create a new fb */
 279    if (!ctx->draw_buffer) {
 280       stfb = CALLOC_STRUCT(st_framebuffer);
 281       if (!stfb)
 282          return FALSE;
 283
 284       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 285       if (!stfb->strb) {
 286          free(stfb);
 287          return FALSE;
 288       }
 289
 290       stfb->dsrb = create_renderbuffer(stdrawi->visual->depth_stencil_format);
 291       if (!stfb->dsrb) {
 292          free(stfb->strb);
 293          free(stfb);
 294          return FALSE;
 295       }
 296
 297       stfb->width = 0;
 298       stfb->height = 0;
 299       stfb->strb_att = strb_att;
 300
 301       ctx->draw_buffer = stfb;
 302    }
 303
 304    ctx->draw_buffer->iface = stdrawi;
 305
 306    return TRUE;
 307 }
 308
 309 static boolean
 310 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 311                     struct st_framebuffer_iface *stdrawi,
 312                     struct st_framebuffer_iface *streadi)
 313 {
 314    struct vg_context *ctx = (struct vg_context *) stctxi;
 315
 316    if (stctxi)
 317       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 318    vg_set_current_context(ctx);
 319
 320    return TRUE;
 321 }
 322
 323 static struct st_context_iface *
 324 vg_api_get_current(struct st_api *stapi)
 325 {
 326    struct vg_context *ctx = vg_current_context();
 327
 328    return (ctx) ? &ctx->iface : NULL;
 329 }
 330
 331 static boolean
 332 vg_api_is_visual_supported(struct st_api *stapi,
 333                            const struct st_visual *visual)
 334 {
 335    /* the impl requires a depth/stencil buffer */
 336    return util_format_is_depth_and_stencil(visual->depth_stencil_format);
 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 };