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 "util/u_memory.h"
  30 #include "util/u_inlines.h"
  31
  32 #include "xm_api.h"
  33 #include "xm_st.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
  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  */
 126 static boolean
 127 xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
 128                                        unsigned width, unsigned height,
 129                                        unsigned mask)
 130 {
 131    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 132    struct pipe_resource templ;
 133    enum st_attachment_type i;
 134
 135    /* remove outdated textures */
 136    if (xstfb->texture_width != width || xstfb->texture_height != height) {
 137       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 138          pipe_resource_reference(&xstfb->textures[i], NULL);
 139    }
 140
 141    memset(&templ, 0, sizeof(templ));
 142    templ.target = PIPE_TEXTURE_2D;
 143    templ.width0 = width;
 144    templ.height0 = height;
 145    templ.depth0 = 1;
 146    templ.last_level = 0;
 147
 148    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 149       enum pipe_format format;
 150       unsigned bind;
 151
 152       /* the texture already exists or not requested */
 153       if (xstfb->textures[i] || !(mask & (1 << i))) {
 154          /* remember the texture */
 155          if (xstfb->textures[i])
 156             mask |= (1 << i);
 157          continue;
 158       }
 159
 160       switch (i) {
 161       case ST_ATTACHMENT_FRONT_LEFT:
 162       case ST_ATTACHMENT_BACK_LEFT:
 163       case ST_ATTACHMENT_FRONT_RIGHT:
 164       case ST_ATTACHMENT_BACK_RIGHT:
 165          format = xstfb->stvis.color_format;
 166          bind = PIPE_BIND_DISPLAY_TARGET |
 167                      PIPE_BIND_RENDER_TARGET;
 168          break;
 169       case ST_ATTACHMENT_DEPTH_STENCIL:
 170          format = xstfb->stvis.depth_stencil_format;
 171          bind = PIPE_BIND_DEPTH_STENCIL;
 172          break;
 173       default:
 174          format = PIPE_FORMAT_NONE;
 175          break;
 176       }
 177
 178       if (format != PIPE_FORMAT_NONE) {
 179          templ.format = format;
 180          templ.bind = bind;
 181
 182          xstfb->textures[i] =
 183             xstfb->screen->resource_create(xstfb->screen, &templ);
 184          if (!xstfb->textures[i])
 185             return FALSE;
 186       }
 187    }
 188
 189    xstfb->texture_width = width;
 190    xstfb->texture_height = height;
 191    xstfb->texture_mask = mask;
 192
 193    return TRUE;
 194 }
 195
 196 static boolean
 197 xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
 198                               const enum st_attachment_type *statts,
 199                               unsigned count,
 200                               struct pipe_resource **out)
 201 {
 202    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 203    unsigned statt_mask, new_mask, i;
 204    boolean resized;
 205    boolean ret;
 206
 207    statt_mask = 0x0;
 208    for (i = 0; i < count; i++)
 209       statt_mask |= 1 << statts[i];
 210    /* record newly allocated textures */
 211    new_mask = statt_mask & ~xstfb->texture_mask;
 212
 213    resized = (xstfb->buffer->width != xstfb->texture_width ||
 214               xstfb->buffer->height != xstfb->texture_height);
 215
 216    /* revalidate textures */
 217    if (resized || new_mask) {
 218       ret = xmesa_st_framebuffer_validate_textures(stfbi,
 219                   xstfb->buffer->width, xstfb->buffer->height, statt_mask);
 220       if (!ret)
 221          return ret;
 222
 223       if (!resized) {
 224          enum st_attachment_type back, front;
 225
 226          back = ST_ATTACHMENT_BACK_LEFT;
 227          front = ST_ATTACHMENT_FRONT_LEFT;
 228          /* copy the contents if front is newly allocated and back is not */
 229          if ((statt_mask & (1 << back)) &&
 230              (new_mask & (1 << front)) &&
 231              !(new_mask & (1 << back))) {
 232             xmesa_st_framebuffer_copy_textures(stfbi, back, front,
 233                   0, 0, xstfb->texture_width, xstfb->texture_height);
 234          }
 235       }
 236    }
 237
 238    for (i = 0; i < count; i++) {
 239       out[i] = NULL;
 240       pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
 241    }
 242
 243    return TRUE;
 244 }
 245
 246 static boolean
 247 xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
 248                                  enum st_attachment_type statt)
 249 {
 250    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 251    boolean ret;
 252
 253    ret = xmesa_st_framebuffer_display(stfbi, statt);
 254    if (ret)
 255       xmesa_check_buffer_size(xstfb->buffer);
 256
 257    return ret;
 258 }
 259
 260 struct st_framebuffer_iface *
 261 xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
 262 {
 263    struct st_framebuffer_iface *stfbi;
 264    struct xmesa_st_framebuffer *xstfb;
 265
 266    assert(xmdpy->display == b->xm_visual->display);
 267
 268    stfbi = CALLOC_STRUCT(st_framebuffer_iface);
 269    xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
 270    if (!stfbi || !xstfb) {
 271       if (stfbi)
 272          FREE(stfbi);
 273       if (xstfb)
 274          FREE(xstfb);
 275       return NULL;
 276    }
 277
 278    xstfb->display = xmdpy;
 279    xstfb->buffer = b;
 280    xstfb->screen = xmdpy->screen;
 281    xstfb->stvis = b->xm_visual->stvis;
 282
 283    stfbi->visual = &xstfb->stvis;
 284    stfbi->flush_front = xmesa_st_framebuffer_flush_front;
 285    stfbi->validate = xmesa_st_framebuffer_validate;
 286    stfbi->st_manager_private = (void *) xstfb;
 287
 288    return stfbi;
 289 }
 290
 291 void
 292 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
 293 {
 294    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 295    int i;
 296
 297    pipe_surface_reference(&xstfb->display_surface, NULL);
 298
 299    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 300       pipe_resource_reference(&xstfb->textures[i], NULL);
 301
 302    FREE(xstfb);
 303    FREE(stfbi);
 304 }
 305
 306 void
 307 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
 308 {
 309    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 310    boolean ret;
 311
 312    ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
 313    if (ret) {
 314       struct pipe_resource **front, **back, *tmp;
 315
 316       front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
 317       back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
 318       /* swap textures only if the front texture has been allocated */
 319       if (*front) {
 320          tmp = *front;
 321          *front = *back;
 322          *back = tmp;
 323       }
 324
 325       xmesa_check_buffer_size(xstfb->buffer);
 326    }
 327 }
 328
 329 void
 330 xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
 331                           enum st_attachment_type src,
 332                           enum st_attachment_type dst,
 333                           int x, int y, int w, int h)
 334 {
 335    xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
 336    if (dst == ST_ATTACHMENT_FRONT_LEFT)
 337       xmesa_st_framebuffer_display(stfbi, dst);
 338 }