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