src/gallium/state_trackers/glx/xlib/xm_st.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 "xm_api.h"
  30 #include "xm_st.h"
  31
  32 #include "util/u_inlines.h"
  33
  34 struct xmesa_st_framebuffer {
  35    XMesaDisplay display;
  36    XMesaBuffer buffer;
  37    struct pipe_screen *screen;
  38
  39    struct st_visual stvis;
  40    enum pipe_texture_target target;
  41
  42    unsigned texture_width, texture_height, texture_mask;
  43    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
  44
  45    struct pipe_resource *display_resource;
  46 };
  47
  48 static INLINE struct xmesa_st_framebuffer *
  49 xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
  50 {
  51    return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
  52 }
  53
  54 /**
  55  * Display an attachment to the xlib_drawable of the framebuffer.
  56  */
  57 static boolean
  58 xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
  59                              enum st_attachment_type statt)
  60 {
  61    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
  62    struct pipe_resource *ptex = xstfb->textures[statt];
  63    struct pipe_resource *pres;
  64
  65    if (!ptex)
  66       return TRUE;
  67
  68    pres = xstfb->display_resource;
  69    /* (re)allocate the surface for the texture to be displayed */
  70    if (!pres || pres != ptex) {
  71       pipe_resource_reference(&xstfb->display_resource, ptex);
  72       pres = xstfb->display_resource;
  73    }
  74
  75    xstfb->screen->flush_frontbuffer(xstfb->screen, pres, 0, 0, &xstfb->buffer->ws);
  76
  77    return TRUE;
  78 }
  79
  80 /**
  81  * Copy the contents between the attachments.
  82  */
  83 static void
  84 xmesa_st_framebuffer_copy_textures(struct st_framebuffer_iface *stfbi,
  85                                    enum st_attachment_type src_statt,
  86                                    enum st_attachment_type dst_statt,
  87                                    unsigned x, unsigned y,
  88                                    unsigned width, unsigned height)
  89 {
  90    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
  91    struct pipe_resource *src_ptex = xstfb->textures[src_statt];
  92    struct pipe_resource *dst_ptex = xstfb->textures[dst_statt];
  93    struct pipe_box src_box;
  94    struct pipe_context *pipe;
  95
  96    if (!src_ptex || !dst_ptex)
  97       return;
  98
  99    pipe = xstfb->display->pipe;
 100    if (!pipe) {
 101       pipe = xstfb->screen->context_create(xstfb->screen, NULL);
 102       if (!pipe)
 103          return;
 104       xstfb->display->pipe = pipe;
 105    }
 106
 107    u_box_2d(x, y, width, height, &src_box);
 108
 109    if (src_ptex && dst_ptex)
 110       pipe->resource_copy_region(pipe, dst_ptex, 0, x, y, 0,
 111                                  src_ptex, 0, &src_box);
 112 }
 113
 114 /**
 115  * Remove outdated textures and create the requested ones.
 116  * This is a helper used during framebuffer validation.
 117  */
 118 static boolean
 119 xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
 120                                        unsigned width, unsigned height,
 121                                        unsigned mask)
 122 {
 123    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 124    struct pipe_resource templ;
 125    enum st_attachment_type i;
 126
 127    /* remove outdated textures */
 128    if (xstfb->texture_width != width || xstfb->texture_height != height) {
 129       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 130          pipe_resource_reference(&xstfb->textures[i], NULL);
 131    }
 132
 133    memset(&templ, 0, sizeof(templ));
 134    templ.target = xstfb->target;
 135    templ.width0 = width;
 136    templ.height0 = height;
 137    templ.depth0 = 1;
 138    templ.array_size = 1;
 139    templ.last_level = 0;
 140
 141    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 142       enum pipe_format format;
 143       unsigned bind;
 144
 145       /* the texture already exists or not requested */
 146       if (xstfb->textures[i] || !(mask & (1 << i))) {
 147          /* remember the texture */
 148          if (xstfb->textures[i])
 149             mask |= (1 << i);
 150          continue;
 151       }
 152
 153       switch (i) {
 154       case ST_ATTACHMENT_FRONT_LEFT:
 155       case ST_ATTACHMENT_BACK_LEFT:
 156       case ST_ATTACHMENT_FRONT_RIGHT:
 157       case ST_ATTACHMENT_BACK_RIGHT:
 158          format = xstfb->stvis.color_format;
 159          bind = PIPE_BIND_DISPLAY_TARGET |
 160                      PIPE_BIND_RENDER_TARGET;
 161          break;
 162       case ST_ATTACHMENT_DEPTH_STENCIL:
 163          format = xstfb->stvis.depth_stencil_format;
 164          bind = PIPE_BIND_DEPTH_STENCIL;
 165          break;
 166       default:
 167          format = PIPE_FORMAT_NONE;
 168          break;
 169       }
 170
 171       if (format != PIPE_FORMAT_NONE) {
 172          templ.format = format;
 173          templ.bind = bind;
 174
 175          xstfb->textures[i] =
 176             xstfb->screen->resource_create(xstfb->screen, &templ);
 177          if (!xstfb->textures[i])
 178             return FALSE;
 179       }
 180    }
 181
 182    xstfb->texture_width = width;
 183    xstfb->texture_height = height;
 184    xstfb->texture_mask = mask;
 185
 186    return TRUE;
 187 }
 188
 189
 190 /**
 191  * Check that a framebuffer's attachments match the window's size.
 192  *
 193  * Called via st_framebuffer_iface::validate()
 194  *
 195  * \param statts  array of framebuffer attachments
 196  * \param count  number of framebuffer attachments in statts[]
 197  * \param out  returns resources for each of the attachments
 198  */
 199 static boolean
 200 xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
 201                               const enum st_attachment_type *statts,
 202                               unsigned count,
 203                               struct pipe_resource **out)
 204 {
 205    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 206    unsigned statt_mask, new_mask, i;
 207    boolean resized;
 208    boolean ret;
 209
 210    /* build mask of ST_ATTACHMENT bits */
 211    statt_mask = 0x0;
 212    for (i = 0; i < count; i++)
 213       statt_mask |= 1 << statts[i];
 214
 215    /* record newly allocated textures */
 216    new_mask = statt_mask & ~xstfb->texture_mask;
 217
 218    /* If xmesa_strict_invalidate is not set, we will not yet have
 219     * called XGetGeometry().  Do so here:
 220     */
 221    if (!xmesa_strict_invalidate)
 222       xmesa_check_buffer_size(xstfb->buffer);
 223
 224    resized = (xstfb->buffer->width != xstfb->texture_width ||
 225               xstfb->buffer->height != xstfb->texture_height);
 226
 227    /* revalidate textures */
 228    if (resized || new_mask) {
 229       ret = xmesa_st_framebuffer_validate_textures(stfbi,
 230                   xstfb->buffer->width, xstfb->buffer->height, statt_mask);
 231       if (!ret)
 232          return ret;
 233
 234       if (!resized) {
 235          enum st_attachment_type back, front;
 236
 237          back = ST_ATTACHMENT_BACK_LEFT;
 238          front = ST_ATTACHMENT_FRONT_LEFT;
 239          /* copy the contents if front is newly allocated and back is not */
 240          if ((statt_mask & (1 << back)) &&
 241              (new_mask & (1 << front)) &&
 242              !(new_mask & (1 << back))) {
 243             xmesa_st_framebuffer_copy_textures(stfbi, back, front,
 244                   0, 0, xstfb->texture_width, xstfb->texture_height);
 245          }
 246       }
 247    }
 248
 249    for (i = 0; i < count; i++) {
 250       out[i] = NULL;
 251       pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
 252    }
 253
 254    return TRUE;
 255 }
 256
 257 /**
 258  * Called via st_framebuffer_iface::flush_front()
 259  */
 260 static boolean
 261 xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
 262                                  enum st_attachment_type statt)
 263 {
 264    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 265    boolean ret;
 266
 267    ret = xmesa_st_framebuffer_display(stfbi, statt);
 268
 269    if (ret && xmesa_strict_invalidate)
 270       xmesa_check_buffer_size(xstfb->buffer);
 271
 272    return ret;
 273 }
 274
 275 struct st_framebuffer_iface *
 276 xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
 277 {
 278    struct st_framebuffer_iface *stfbi;
 279    struct xmesa_st_framebuffer *xstfb;
 280
 281    assert(xmdpy->display == b->xm_visual->display);
 282
 283    stfbi = CALLOC_STRUCT(st_framebuffer_iface);
 284    xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
 285    if (!stfbi || !xstfb) {
 286       if (stfbi)
 287          FREE(stfbi);
 288       if (xstfb)
 289          FREE(xstfb);
 290       return NULL;
 291    }
 292
 293    xstfb->display = xmdpy;
 294    xstfb->buffer = b;
 295    xstfb->screen = xmdpy->screen;
 296    xstfb->stvis = b->xm_visual->stvis;
 297    if(xstfb->screen->get_param(xstfb->screen, PIPE_CAP_NPOT_TEXTURES))
 298       xstfb->target = PIPE_TEXTURE_2D;
 299    else
 300       xstfb->target = PIPE_TEXTURE_RECT;
 301
 302    stfbi->visual = &xstfb->stvis;
 303    stfbi->flush_front = xmesa_st_framebuffer_flush_front;
 304    stfbi->validate = xmesa_st_framebuffer_validate;
 305    stfbi->st_manager_private = (void *) xstfb;
 306
 307    return stfbi;
 308 }
 309
 310 void
 311 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
 312 {
 313    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 314    int i;
 315
 316    pipe_resource_reference(&xstfb->display_resource, NULL);
 317
 318    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 319       pipe_resource_reference(&xstfb->textures[i], NULL);
 320
 321    FREE(xstfb);
 322    FREE(stfbi);
 323 }
 324
 325 void
 326 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
 327 {
 328    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 329    boolean ret;
 330
 331    ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
 332    if (ret) {
 333       struct pipe_resource **front, **back, *tmp;
 334
 335       front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
 336       back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
 337       /* swap textures only if the front texture has been allocated */
 338       if (*front) {
 339          tmp = *front;
 340          *front = *back;
 341          *back = tmp;
 342
 343          /* the current context should validate the buffer after swapping */
 344          if (!xmesa_strict_invalidate)
 345             xmesa_notify_invalid_buffer(xstfb->buffer);
 346       }
 347
 348       if (xmesa_strict_invalidate)
 349          xmesa_check_buffer_size(xstfb->buffer);
 350    }
 351 }
 352
 353 void
 354 xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
 355                           enum st_attachment_type src,
 356                           enum st_attachment_type dst,
 357                           int x, int y, int w, int h)
 358 {
 359    xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
 360    if (dst == ST_ATTACHMENT_FRONT_LEFT)
 361       xmesa_st_framebuffer_display(stfbi, dst);
 362 }