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 #include "util/u_atomic.h"
  34
  35 struct xmesa_st_framebuffer {
  36    XMesaDisplay display;
  37    XMesaBuffer buffer;
  38    struct pipe_screen *screen;
  39
  40    struct st_visual stvis;
  41    enum pipe_texture_target target;
  42
  43    unsigned texture_width, texture_height, texture_mask;
  44    struct pipe_resource *textures[ST_ATTACHMENT_COUNT];
  45
  46    struct pipe_resource *display_resource;
  47 };
  48
  49 static INLINE struct xmesa_st_framebuffer *
  50 xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
  51 {
  52    return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
  53 }
  54
  55 /**
  56  * Display an attachment to the xlib_drawable of the framebuffer.
  57  */
  58 static boolean
  59 xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
  60                              enum st_attachment_type statt)
  61 {
  62    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
  63    struct pipe_resource *ptex = xstfb->textures[statt];
  64    struct pipe_resource *pres;
  65
  66    if (!ptex)
  67       return TRUE;
  68
  69    pres = xstfb->display_resource;
  70    /* (re)allocate the surface for the texture to be displayed */
  71    if (!pres || pres != ptex) {
  72       pipe_resource_reference(&xstfb->display_resource, ptex);
  73       pres = xstfb->display_resource;
  74    }
  75
  76    xstfb->screen->flush_frontbuffer(xstfb->screen, pres, 0, 0, &xstfb->buffer->ws);
  77
  78    return TRUE;
  79 }
  80
  81 /**
  82  * Copy the contents between the attachments.
  83  */
  84 static void
  85 xmesa_st_framebuffer_copy_textures(struct st_framebuffer_iface *stfbi,
  86                                    enum st_attachment_type src_statt,
  87                                    enum st_attachment_type dst_statt,
  88                                    unsigned x, unsigned y,
  89                                    unsigned width, unsigned height)
  90 {
  91    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
  92    struct pipe_resource *src_ptex = xstfb->textures[src_statt];
  93    struct pipe_resource *dst_ptex = xstfb->textures[dst_statt];
  94    struct pipe_box src_box;
  95    struct pipe_context *pipe;
  96
  97    if (!src_ptex || !dst_ptex)
  98       return;
  99
 100    pipe = xmesa_get_context(stfbi);
 101
 102    u_box_2d(x, y, width, height, &src_box);
 103
 104    if (src_ptex && dst_ptex)
 105       pipe->resource_copy_region(pipe, dst_ptex, 0, x, y, 0,
 106                                  src_ptex, 0, &src_box);
 107 }
 108
 109 /**
 110  * Remove outdated textures and create the requested ones.
 111  * This is a helper used during framebuffer validation.
 112  */
 113 boolean
 114 xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
 115                                        unsigned width, unsigned height,
 116                                        unsigned mask)
 117 {
 118    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 119    struct pipe_resource templ;
 120    enum st_attachment_type i;
 121
 122    /* remove outdated textures */
 123    if (xstfb->texture_width != width || xstfb->texture_height != height) {
 124       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 125          pipe_resource_reference(&xstfb->textures[i], NULL);
 126    }
 127
 128    memset(&templ, 0, sizeof(templ));
 129    templ.target = xstfb->target;
 130    templ.width0 = width;
 131    templ.height0 = height;
 132    templ.depth0 = 1;
 133    templ.array_size = 1;
 134    templ.last_level = 0;
 135
 136    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 137       enum pipe_format format;
 138       unsigned bind;
 139
 140       /* the texture already exists or not requested */
 141       if (xstfb->textures[i] || !(mask & (1 << i))) {
 142          /* remember the texture */
 143          if (xstfb->textures[i])
 144             mask |= (1 << i);
 145          continue;
 146       }
 147
 148       switch (i) {
 149       case ST_ATTACHMENT_FRONT_LEFT:
 150       case ST_ATTACHMENT_BACK_LEFT:
 151       case ST_ATTACHMENT_FRONT_RIGHT:
 152       case ST_ATTACHMENT_BACK_RIGHT:
 153          format = xstfb->stvis.color_format;
 154          bind = PIPE_BIND_DISPLAY_TARGET |
 155                      PIPE_BIND_RENDER_TARGET;
 156          break;
 157       case ST_ATTACHMENT_DEPTH_STENCIL:
 158          format = xstfb->stvis.depth_stencil_format;
 159          bind = PIPE_BIND_DEPTH_STENCIL;
 160          break;
 161       default:
 162          format = PIPE_FORMAT_NONE;
 163          break;
 164       }
 165
 166       if (format != PIPE_FORMAT_NONE) {
 167          templ.format = format;
 168          templ.bind = bind;
 169
 170          xstfb->textures[i] =
 171             xstfb->screen->resource_create(xstfb->screen, &templ);
 172          if (!xstfb->textures[i])
 173             return FALSE;
 174       }
 175    }
 176
 177    xstfb->texture_width = width;
 178    xstfb->texture_height = height;
 179    xstfb->texture_mask = mask;
 180
 181    return TRUE;
 182 }
 183
 184
 185 /**
 186  * Check that a framebuffer's attachments match the window's size.
 187  *
 188  * Called via st_framebuffer_iface::validate()
 189  *
 190  * \param statts  array of framebuffer attachments
 191  * \param count  number of framebuffer attachments in statts[]
 192  * \param out  returns resources for each of the attachments
 193  */
 194 static boolean
 195 xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
 196                               const enum st_attachment_type *statts,
 197                               unsigned count,
 198                               struct pipe_resource **out)
 199 {
 200    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 201    unsigned statt_mask, new_mask, i;
 202    boolean resized;
 203    boolean ret;
 204
 205    /* build mask of ST_ATTACHMENT bits */
 206    statt_mask = 0x0;
 207    for (i = 0; i < count; i++)
 208       statt_mask |= 1 << statts[i];
 209
 210    /* record newly allocated textures */
 211    new_mask = statt_mask & ~xstfb->texture_mask;
 212
 213    /* If xmesa_strict_invalidate is not set, we will not yet have
 214     * called XGetGeometry().  Do so here:
 215     */
 216    if (!xmesa_strict_invalidate)
 217       xmesa_check_buffer_size(xstfb->buffer);
 218
 219    resized = (xstfb->buffer->width != xstfb->texture_width ||
 220               xstfb->buffer->height != xstfb->texture_height);
 221
 222    /* revalidate textures */
 223    if (resized || new_mask) {
 224       ret = xmesa_st_framebuffer_validate_textures(stfbi,
 225                   xstfb->buffer->width, xstfb->buffer->height, statt_mask);
 226       if (!ret)
 227          return ret;
 228
 229       if (!resized) {
 230          enum st_attachment_type back, front;
 231
 232          back = ST_ATTACHMENT_BACK_LEFT;
 233          front = ST_ATTACHMENT_FRONT_LEFT;
 234          /* copy the contents if front is newly allocated and back is not */
 235          if ((statt_mask & (1 << back)) &&
 236              (new_mask & (1 << front)) &&
 237              !(new_mask & (1 << back))) {
 238             xmesa_st_framebuffer_copy_textures(stfbi, back, front,
 239                   0, 0, xstfb->texture_width, xstfb->texture_height);
 240          }
 241       }
 242    }
 243
 244    for (i = 0; i < count; i++) {
 245       out[i] = NULL;
 246       pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
 247    }
 248
 249    return TRUE;
 250 }
 251
 252 /**
 253  * Called via st_framebuffer_iface::flush_front()
 254  */
 255 static boolean
 256 xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
 257                                  enum st_attachment_type statt)
 258 {
 259    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 260    boolean ret;
 261
 262    ret = xmesa_st_framebuffer_display(stfbi, statt);
 263
 264    if (ret && xmesa_strict_invalidate)
 265       xmesa_check_buffer_size(xstfb->buffer);
 266
 267    return ret;
 268 }
 269
 270 struct st_framebuffer_iface *
 271 xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
 272 {
 273    struct st_framebuffer_iface *stfbi;
 274    struct xmesa_st_framebuffer *xstfb;
 275
 276    assert(xmdpy->display == b->xm_visual->display);
 277
 278    stfbi = CALLOC_STRUCT(st_framebuffer_iface);
 279    xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
 280    if (!stfbi || !xstfb) {
 281       if (stfbi)
 282          FREE(stfbi);
 283       if (xstfb)
 284          FREE(xstfb);
 285       return NULL;
 286    }
 287
 288    xstfb->display = xmdpy;
 289    xstfb->buffer = b;
 290    xstfb->screen = xmdpy->screen;
 291    xstfb->stvis = b->xm_visual->stvis;
 292    if(xstfb->screen->get_param(xstfb->screen, PIPE_CAP_NPOT_TEXTURES))
 293       xstfb->target = PIPE_TEXTURE_2D;
 294    else
 295       xstfb->target = PIPE_TEXTURE_RECT;
 296
 297    stfbi->visual = &xstfb->stvis;
 298    stfbi->flush_front = xmesa_st_framebuffer_flush_front;
 299    stfbi->validate = xmesa_st_framebuffer_validate;
 300    p_atomic_set(&stfbi->stamp, 1);
 301    stfbi->st_manager_private = (void *) xstfb;
 302
 303    return stfbi;
 304 }
 305
 306 void
 307 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
 308 {
 309    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 310    int i;
 311
 312    pipe_resource_reference(&xstfb->display_resource, NULL);
 313
 314    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 315       pipe_resource_reference(&xstfb->textures[i], NULL);
 316
 317    FREE(xstfb);
 318    FREE(stfbi);
 319 }
 320
 321 void
 322 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
 323 {
 324    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 325    boolean ret;
 326
 327    ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
 328    if (ret) {
 329       struct pipe_resource **front, **back, *tmp;
 330
 331       front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
 332       back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
 333       /* swap textures only if the front texture has been allocated */
 334       if (*front) {
 335          tmp = *front;
 336          *front = *back;
 337          *back = tmp;
 338
 339          /* the current context should validate the buffer after swapping */
 340          if (!xmesa_strict_invalidate)
 341             xmesa_notify_invalid_buffer(xstfb->buffer);
 342       }
 343
 344       if (xmesa_strict_invalidate)
 345          xmesa_check_buffer_size(xstfb->buffer);
 346    }
 347 }
 348
 349 void
 350 xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
 351                           enum st_attachment_type src,
 352                           enum st_attachment_type dst,
 353                           int x, int y, int w, int h)
 354 {
 355    xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
 356    if (dst == ST_ATTACHMENT_FRONT_LEFT)
 357       xmesa_st_framebuffer_display(stfbi, dst);
 358 }
 359
 360 struct pipe_resource*
 361 xmesa_get_attachment(struct st_framebuffer_iface *stfbi,
 362                      enum st_attachment_type st_attachment)
 363 {
 364    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 365    struct pipe_resource* res;
 366
 367    res = xstfb->textures[st_attachment];
 368    return res;
 369 }
 370
 371 struct pipe_context*
 372 xmesa_get_context(struct st_framebuffer_iface* stfbi)
 373 {
 374    struct pipe_context *pipe;
 375    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 376
 377    pipe = xstfb->display->pipe;
 378    if (!pipe) {
 379       pipe = xstfb->screen->context_create(xstfb->screen, NULL);
 380       if (!pipe)
 381          return NULL;
 382       xstfb->display->pipe = pipe;
 383    }
 384    return pipe;
 385 }
 386