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 124  * Remove outdated textures and create the requested ones.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