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_box.h"
  37 #include "util/u_surface.h"
  38
  39 #include "vg_api.h"
  40 #include "vg_manager.h"
  41 #include "vg_context.h"
  42 #include "api.h"
  43 #include "handle.h"
  44
  45 static boolean
  46 vg_context_update_color_rb(struct vg_context *ctx, struct pipe_resource *pt)
  47 {
  48    struct st_renderbuffer *strb = ctx->draw_buffer->strb;
  49    struct pipe_context *pipe = ctx->pipe;
  50    struct pipe_surface surf_tmpl;
  51
  52    if (strb->texture == pt) {
  53       pipe_resource_reference(&pt, NULL);
  54       return FALSE;
  55    }
  56
  57    /* unreference existing ones */
  58    pipe_surface_reference(&strb->surface, NULL);
  59    pipe_resource_reference(&strb->texture, NULL);
  60    strb->width = strb->height = 0;
  61
  62    strb->texture = pt;
  63
  64    memset(&surf_tmpl, 0, sizeof(surf_tmpl));
  65    u_surface_default_template(&surf_tmpl, strb->texture,
  66                               PIPE_BIND_RENDER_TARGET);
  67    strb->surface = pipe->create_surface(pipe, strb->texture, &surf_tmpl);
  68
  69    if (!strb->surface) {
  70       pipe_resource_reference(&strb->texture, NULL);
  71       return TRUE;
  72    }
  73
  74    strb->width = pt->width0;
  75    strb->height = pt->height0;
  76
  77    return TRUE;
  78 }
  79
  80 /**
  81  * Flush the front buffer if the current context renders to the front buffer.
  82  */
  83 void
  84 vg_manager_flush_frontbuffer(struct vg_context *ctx)
  85 {
  86    struct st_framebuffer *stfb = ctx->draw_buffer;
  87
  88    if (!stfb)
  89       return;
  90
  91    switch (stfb->strb_att) {
  92    case ST_ATTACHMENT_FRONT_LEFT:
  93    case ST_ATTACHMENT_FRONT_RIGHT:
  94       stfb->iface->flush_front(stfb->iface, stfb->strb_att);
  95       break;
  96    default:
  97       break;
  98    }
  99 }
 100
 101 /**
 102  * Re-validate the framebuffer.
 103  */
 104 void
 105 vg_manager_validate_framebuffer(struct vg_context *ctx)
 106 {
 107    struct st_framebuffer *stfb = ctx->draw_buffer;
 108    struct pipe_resource *pt;
 109    int32_t new_stamp;
 110
 111    /* no binding surface */
 112    if (!stfb)
 113       return;
 114
 115    new_stamp = p_atomic_read(&stfb->iface->stamp);
 116    if (stfb->iface_stamp != new_stamp) {
 117       do {
 118          /* validate the fb */
 119          if (!stfb->iface->validate(stfb->iface, &stfb->strb_att,
 120                                     1, &pt) || !pt)
 121             return;
 122
 123          stfb->iface_stamp = new_stamp;
 124          new_stamp = p_atomic_read(&stfb->iface->stamp);
 125
 126       } while (stfb->iface_stamp != new_stamp);
 127
 128       if (vg_context_update_color_rb(ctx, pt) ||
 129           stfb->width != pt->width0 ||
 130           stfb->height != pt->height0)
 131          ++stfb->stamp;
 132
 133       stfb->width = pt->width0;
 134       stfb->height = pt->height0;
 135    }
 136
 137    if (ctx->draw_stamp != stfb->stamp) {
 138       ctx->state.dirty |= FRAMEBUFFER_DIRTY;
 139       ctx->draw_stamp = stfb->stamp;
 140    }
 141 }
 142
 143 static void
 144 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 145                  struct pipe_fence_handle **fence)
 146 {
 147    struct vg_context *ctx = (struct vg_context *) stctxi;
 148    ctx->pipe->flush(ctx->pipe, fence);
 149    if (flags & ST_FLUSH_FRONT)
 150       vg_manager_flush_frontbuffer(ctx);
 151 }
 152
 153 static void
 154 vg_context_destroy(struct st_context_iface *stctxi)
 155 {
 156    struct vg_context *ctx = (struct vg_context *) stctxi;
 157    struct pipe_context *pipe = ctx->pipe;
 158
 159    vg_destroy_context(ctx);
 160    pipe->destroy(pipe);
 161 }
 162
 163 static struct st_context_iface *
 164 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 165                       const struct st_context_attribs *attribs,
 166                       struct st_context_iface *shared_stctxi)
 167 {
 168    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 169    struct vg_context *ctx;
 170    struct pipe_context *pipe;
 171
 172    if (!(stapi->profile_mask & (1 << attribs->profile)))
 173       return NULL;
 174
 175    /* only 1.0 is supported */
 176    if (attribs->major > 1 || (attribs->major == 1 && attribs->minor > 0))
 177       return NULL;
 178
 179    /* for VGHandle / pointer lookups */
 180    init_handles();
 181
 182    pipe = smapi->screen->context_create(smapi->screen, NULL);
 183    if (!pipe)
 184       return NULL;
 185    ctx = vg_create_context(pipe, NULL, shared_ctx);
 186    if (!ctx) {
 187       pipe->destroy(pipe);
 188       return NULL;
 189    }
 190
 191    ctx->iface.destroy = vg_context_destroy;
 192
 193    ctx->iface.flush = vg_context_flush;
 194
 195    ctx->iface.teximage = NULL;
 196    ctx->iface.copy = NULL;
 197
 198    ctx->iface.st_context_private = (void *) smapi;
 199
 200    return &ctx->iface;
 201 }
 202
 203 static struct st_renderbuffer *
 204 create_renderbuffer(enum pipe_format format)
 205 {
 206    struct st_renderbuffer *strb;
 207
 208    strb = CALLOC_STRUCT(st_renderbuffer);
 209    if (strb)
 210       strb->format = format;
 211
 212    return strb;
 213 }
 214
 215 static void
 216 destroy_renderbuffer(struct st_renderbuffer *strb)
 217 {
 218    pipe_surface_reference(&strb->surface, NULL);
 219    pipe_resource_reference(&strb->texture, NULL);
 220    FREE(strb);
 221 }
 222
 223 /**
 224  * Decide the buffer to render to.
 225  */
 226 static enum st_attachment_type
 227 choose_attachment(struct st_framebuffer_iface *stfbi)
 228 {
 229    enum st_attachment_type statt;
 230
 231    statt = stfbi->visual->render_buffer;
 232    if (statt != ST_ATTACHMENT_INVALID) {
 233       /* use the buffer given by the visual, unless it is unavailable */
 234       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 235          switch (statt) {
 236          case ST_ATTACHMENT_BACK_LEFT:
 237             statt = ST_ATTACHMENT_FRONT_LEFT;
 238             break;
 239          case ST_ATTACHMENT_BACK_RIGHT:
 240             statt = ST_ATTACHMENT_FRONT_RIGHT;
 241             break;
 242          default:
 243             break;
 244          }
 245
 246          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 247             statt = ST_ATTACHMENT_INVALID;
 248       }
 249    }
 250
 251    return statt;
 252 }
 253
 254 /**
 255  * Bind the context to the given framebuffers.
 256  */
 257 static boolean
 258 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 259                              struct st_framebuffer_iface *stdrawi,
 260                              struct st_framebuffer_iface *streadi)
 261 {
 262    struct vg_context *ctx = (struct vg_context *) stctxi;
 263    struct st_framebuffer *stfb;
 264    enum st_attachment_type strb_att;
 265
 266    /* the draw and read framebuffers must be the same */
 267    if (stdrawi != streadi)
 268       return FALSE;
 269
 270    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 271
 272    if (ctx->draw_buffer) {
 273       stfb = ctx->draw_buffer;
 274
 275       /* free the existing fb */
 276       if (!stdrawi ||
 277           stfb->strb_att != strb_att ||
 278           stfb->strb->format != stdrawi->visual->color_format) {
 279          destroy_renderbuffer(stfb->strb);
 280          destroy_renderbuffer(stfb->dsrb);
 281          FREE(stfb);
 282
 283          ctx->draw_buffer = NULL;
 284       }
 285    }
 286
 287    if (!stdrawi)
 288       return TRUE;
 289
 290    if (strb_att == ST_ATTACHMENT_INVALID)
 291       return FALSE;
 292
 293    /* create a new fb */
 294    if (!ctx->draw_buffer) {
 295       stfb = CALLOC_STRUCT(st_framebuffer);
 296       if (!stfb)
 297          return FALSE;
 298
 299       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 300       if (!stfb->strb) {
 301          FREE(stfb);
 302          return FALSE;
 303       }
 304
 305       stfb->dsrb = create_renderbuffer(ctx->ds_format);
 306       if (!stfb->dsrb) {
 307          FREE(stfb->strb);
 308          FREE(stfb);
 309          return FALSE;
 310       }
 311
 312       stfb->width = 0;
 313       stfb->height = 0;
 314       stfb->strb_att = strb_att;
 315       stfb->stamp = 1;
 316       stfb->iface_stamp = p_atomic_read(&stdrawi->stamp) - 1;
 317
 318       ctx->draw_buffer = stfb;
 319    }
 320
 321    ctx->draw_buffer->iface = stdrawi;
 322    ctx->draw_stamp = ctx->draw_buffer->stamp - 1;
 323
 324    return TRUE;
 325 }
 326
 327 static boolean
 328 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 329                     struct st_framebuffer_iface *stdrawi,
 330                     struct st_framebuffer_iface *streadi)
 331 {
 332    struct vg_context *ctx = (struct vg_context *) stctxi;
 333
 334    if (stctxi)
 335       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 336    vg_set_current_context(ctx);
 337
 338    return TRUE;
 339 }
 340
 341 static struct st_context_iface *
 342 vg_api_get_current(struct st_api *stapi)
 343 {
 344    struct vg_context *ctx = vg_current_context();
 345
 346    return (ctx) ? &ctx->iface : NULL;
 347 }
 348
 349 static st_proc_t
 350 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 351 {
 352    return api_get_proc_address(procname);
 353 }
 354
 355 static void
 356 vg_api_destroy(struct st_api *stapi)
 357 {
 358 }
 359
 360 static const struct st_api vg_api = {
 361    "Vega " VEGA_VERSION_STRING,
 362    ST_API_OPENVG,
 363    ST_PROFILE_DEFAULT_MASK,
 364    vg_api_destroy,
 365    vg_api_get_proc_address,
 366    vg_api_create_context,
 367    vg_api_make_current,
 368    vg_api_get_current,
 369 };
 370
 371 const struct st_api *
 372 vg_api_get(void)
 373 {
 374    return &vg_api;
 375 }