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    u_surface_default_template(&surf_tmpl, strb->texture);
  65    strb->surface = pipe->create_surface(pipe, strb->texture, &surf_tmpl);
  66
  67    if (!strb->surface) {
  68       pipe_resource_reference(&strb->texture, NULL);
  69       return TRUE;
  70    }
  71
  72    strb->width = pt->width0;
  73    strb->height = pt->height0;
  74
  75    return TRUE;
  76 }
  77
  78 /**
  79  * Flush the front buffer if the current context renders to the front buffer.
  80  */
  81 void
  82 vg_manager_flush_frontbuffer(struct vg_context *ctx)
  83 {
  84    struct st_framebuffer *stfb = ctx->draw_buffer;
  85
  86    if (!stfb)
  87       return;
  88
  89    switch (stfb->strb_att) {
  90    case ST_ATTACHMENT_FRONT_LEFT:
  91    case ST_ATTACHMENT_FRONT_RIGHT:
  92       stfb->iface->flush_front(&ctx->iface, stfb->iface, stfb->strb_att);
  93       break;
  94    default:
  95       break;
  96    }
  97 }
  98
  99 /**
 100  * Re-validate the framebuffer.
 101  */
 102 void
 103 vg_manager_validate_framebuffer(struct vg_context *ctx)
 104 {
 105    struct st_framebuffer *stfb = ctx->draw_buffer;
 106    struct pipe_resource *pt;
 107    int32_t new_stamp;
 108
 109    /* no binding surface */
 110    if (!stfb)
 111       return;
 112
 113    new_stamp = p_atomic_read(&stfb->iface->stamp);
 114    if (stfb->iface_stamp != new_stamp) {
 115       do {
 116          /* validate the fb */
 117          if (!stfb->iface->validate(stfb->iface, &stfb->strb_att,
 118                                     1, &pt) || !pt)
 119             return;
 120
 121          stfb->iface_stamp = new_stamp;
 122          new_stamp = p_atomic_read(&stfb->iface->stamp);
 123
 124       } while (stfb->iface_stamp != new_stamp);
 125
 126       if (vg_context_update_color_rb(ctx, pt) ||
 127           stfb->width != pt->width0 ||
 128           stfb->height != pt->height0)
 129          ++stfb->stamp;
 130
 131       stfb->width = pt->width0;
 132       stfb->height = pt->height0;
 133    }
 134
 135    if (ctx->draw_stamp != stfb->stamp) {
 136       ctx->state.dirty |= FRAMEBUFFER_DIRTY;
 137       ctx->draw_stamp = stfb->stamp;
 138    }
 139 }
 140
 141 static void
 142 vg_context_flush(struct st_context_iface *stctxi, unsigned flags,
 143                  struct pipe_fence_handle **fence)
 144 {
 145    struct vg_context *ctx = (struct vg_context *) stctxi;
 146    ctx->pipe->flush(ctx->pipe, fence);
 147    if (flags & ST_FLUSH_FRONT)
 148       vg_manager_flush_frontbuffer(ctx);
 149 }
 150
 151 static void
 152 vg_context_destroy(struct st_context_iface *stctxi)
 153 {
 154    struct vg_context *ctx = (struct vg_context *) stctxi;
 155    struct pipe_context *pipe = ctx->pipe;
 156
 157    vg_destroy_context(ctx);
 158    pipe->destroy(pipe);
 159 }
 160
 161 static struct st_context_iface *
 162 vg_api_create_context(struct st_api *stapi, struct st_manager *smapi,
 163                       const struct st_context_attribs *attribs,
 164                       enum st_context_error *error,
 165                       struct st_context_iface *shared_stctxi)
 166 {
 167    struct vg_context *shared_ctx = (struct vg_context *) shared_stctxi;
 168    struct vg_context *ctx;
 169    struct pipe_context *pipe;
 170
 171    if (!(stapi->profile_mask & (1 << attribs->profile))) {
 172       *error = ST_CONTEXT_ERROR_BAD_API;
 173       return NULL;
 174    }
 175
 176    /* only 1.0 is supported */
 177    if (attribs->major > 1 || (attribs->major == 1 && attribs->minor > 0)) {
 178       *error = ST_CONTEXT_ERROR_BAD_VERSION;
 179       return NULL;
 180    }
 181
 182    /* for VGHandle / pointer lookups */
 183    init_handles();
 184
 185    pipe = smapi->screen->context_create(smapi->screen, NULL);
 186    if (!pipe) {
 187       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 188       return NULL;
 189    }
 190    ctx = vg_create_context(pipe, NULL, shared_ctx);
 191    if (!ctx) {
 192       pipe->destroy(pipe);
 193       *error = ST_CONTEXT_ERROR_NO_MEMORY;
 194       return NULL;
 195    }
 196
 197    ctx->iface.destroy = vg_context_destroy;
 198
 199    ctx->iface.flush = vg_context_flush;
 200
 201    ctx->iface.teximage = NULL;
 202    ctx->iface.copy = NULL;
 203
 204    ctx->iface.st_context_private = (void *) smapi;
 205
 206    return &ctx->iface;
 207 }
 208
 209 static struct st_renderbuffer *
 210 create_renderbuffer(enum pipe_format format)
 211 {
 212    struct st_renderbuffer *strb;
 213
 214    strb = CALLOC_STRUCT(st_renderbuffer);
 215    if (strb)
 216       strb->format = format;
 217
 218    return strb;
 219 }
 220
 221 static void
 222 destroy_renderbuffer(struct st_renderbuffer *strb)
 223 {
 224    pipe_surface_reference(&strb->surface, NULL);
 225    pipe_resource_reference(&strb->texture, NULL);
 226    FREE(strb);
 227 }
 228
 229 /**
 230  * Decide the buffer to render to.
 231  */
 232 static enum st_attachment_type
 233 choose_attachment(struct st_framebuffer_iface *stfbi)
 234 {
 235    enum st_attachment_type statt;
 236
 237    statt = stfbi->visual->render_buffer;
 238    if (statt != ST_ATTACHMENT_INVALID) {
 239       /* use the buffer given by the visual, unless it is unavailable */
 240       if (!st_visual_have_buffers(stfbi->visual, 1 << statt)) {
 241          switch (statt) {
 242          case ST_ATTACHMENT_BACK_LEFT:
 243             statt = ST_ATTACHMENT_FRONT_LEFT;
 244             break;
 245          case ST_ATTACHMENT_BACK_RIGHT:
 246             statt = ST_ATTACHMENT_FRONT_RIGHT;
 247             break;
 248          default:
 249             break;
 250          }
 251
 252          if (!st_visual_have_buffers(stfbi->visual, 1 << statt))
 253             statt = ST_ATTACHMENT_INVALID;
 254       }
 255    }
 256
 257    return statt;
 258 }
 259
 260 /**
 261  * Bind the context to the given framebuffers.
 262  */
 263 static boolean
 264 vg_context_bind_framebuffers(struct st_context_iface *stctxi,
 265                              struct st_framebuffer_iface *stdrawi,
 266                              struct st_framebuffer_iface *streadi)
 267 {
 268    struct vg_context *ctx = (struct vg_context *) stctxi;
 269    struct st_framebuffer *stfb;
 270    enum st_attachment_type strb_att;
 271
 272    /* the draw and read framebuffers must be the same */
 273    if (stdrawi != streadi)
 274       return FALSE;
 275
 276    strb_att = (stdrawi) ? choose_attachment(stdrawi) : ST_ATTACHMENT_INVALID;
 277
 278    if (ctx->draw_buffer) {
 279       stfb = ctx->draw_buffer;
 280
 281       /* free the existing fb */
 282       if (!stdrawi ||
 283           stfb->strb_att != strb_att ||
 284           stfb->strb->format != stdrawi->visual->color_format) {
 285          destroy_renderbuffer(stfb->strb);
 286          destroy_renderbuffer(stfb->dsrb);
 287          FREE(stfb);
 288
 289          ctx->draw_buffer = NULL;
 290       }
 291    }
 292
 293    if (!stdrawi)
 294       return TRUE;
 295
 296    if (strb_att == ST_ATTACHMENT_INVALID)
 297       return FALSE;
 298
 299    /* create a new fb */
 300    if (!ctx->draw_buffer) {
 301       stfb = CALLOC_STRUCT(st_framebuffer);
 302       if (!stfb)
 303          return FALSE;
 304
 305       stfb->strb = create_renderbuffer(stdrawi->visual->color_format);
 306       if (!stfb->strb) {
 307          FREE(stfb);
 308          return FALSE;
 309       }
 310
 311       stfb->dsrb = create_renderbuffer(ctx->ds_format);
 312       if (!stfb->dsrb) {
 313          FREE(stfb->strb);
 314          FREE(stfb);
 315          return FALSE;
 316       }
 317
 318       stfb->width = 0;
 319       stfb->height = 0;
 320       stfb->strb_att = strb_att;
 321       stfb->stamp = 1;
 322       stfb->iface_stamp = p_atomic_read(&stdrawi->stamp) - 1;
 323
 324       ctx->draw_buffer = stfb;
 325    }
 326
 327    ctx->draw_buffer->iface = stdrawi;
 328    ctx->draw_stamp = ctx->draw_buffer->stamp - 1;
 329
 330    return TRUE;
 331 }
 332
 333 static boolean
 334 vg_api_make_current(struct st_api *stapi, struct st_context_iface *stctxi,
 335                     struct st_framebuffer_iface *stdrawi,
 336                     struct st_framebuffer_iface *streadi)
 337 {
 338    struct vg_context *ctx = (struct vg_context *) stctxi;
 339
 340    if (stctxi)
 341       vg_context_bind_framebuffers(stctxi, stdrawi, streadi);
 342    vg_set_current_context(ctx);
 343
 344    return TRUE;
 345 }
 346
 347 static struct st_context_iface *
 348 vg_api_get_current(struct st_api *stapi)
 349 {
 350    struct vg_context *ctx = vg_current_context();
 351
 352    return (ctx) ? &ctx->iface : NULL;
 353 }
 354
 355 static st_proc_t
 356 vg_api_get_proc_address(struct st_api *stapi, const char *procname)
 357 {
 358    return api_get_proc_address(procname);
 359 }
 360
 361 static void
 362 vg_api_destroy(struct st_api *stapi)
 363 {
 364 }
 365
 366 static const struct st_api vg_api = {
 367    "Vega " VEGA_VERSION_STRING,
 368    ST_API_OPENVG,
 369    ST_PROFILE_DEFAULT_MASK,
 370    0,
 371    vg_api_destroy,
 372    vg_api_get_proc_address,
 373    vg_api_create_context,
 374    vg_api_make_current,
 375    vg_api_get_current,
 376 };
 377
 378 const struct st_api *
 379 vg_api_get(void)
 380 {
 381    return &vg_api;
 382 }