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_surface *src, *dst;
 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    src = xstfb->screen->get_tex_surface(xstfb->screen,
 114          src_ptex, 0, 0, 0, PIPE_BIND_BLIT_SOURCE);
 115    dst = xstfb->screen->get_tex_surface(xstfb->screen,
 116          dst_ptex, 0, 0, 0, PIPE_BIND_BLIT_DESTINATION);
 117
 118    if (src && dst)
 119       pipe->surface_copy(pipe, dst, x, y, src, x, y, width, height);
 120
 121    pipe_surface_reference(&src, NULL);
 122    pipe_surface_reference(&dst, NULL);
 123 }
 124
 125 /**
 126  * Remove outdated textures and create the requested ones.
 127  */
 128 static void
 129 xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
 130                                        unsigned width, unsigned height,
 131                                        unsigned mask)
 132 {
 133    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 134    struct pipe_resource templ;
 135    enum st_attachment_type i;
 136
 137    /* remove outdated textures */
 138    if (xstfb->texture_width != width || xstfb->texture_height != height) {
 139       for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 140          pipe_resource_reference(&xstfb->textures[i], NULL);
 141    }
 142
 143    memset(&templ, 0, sizeof(templ));
 144    templ.target = PIPE_TEXTURE_2D;
 145    templ.width0 = width;
 146    templ.height0 = height;
 147    templ.depth0 = 1;
 148    templ.last_level = 0;
 149
 150    for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
 151       enum pipe_format format;
 152       unsigned bind;
 153
 154       /* the texture already exists or not requested */
 155       if (xstfb->textures[i] || !(mask & (1 << i))) {
 156          /* remember the texture */
 157          if (xstfb->textures[i])
 158             mask |= (1 << i);
 159          continue;
 160       }
 161
 162       switch (i) {
 163       case ST_ATTACHMENT_FRONT_LEFT:
 164       case ST_ATTACHMENT_BACK_LEFT:
 165       case ST_ATTACHMENT_FRONT_RIGHT:
 166       case ST_ATTACHMENT_BACK_RIGHT:
 167          format = xstfb->stvis.color_format;
 168          bind = PIPE_BIND_DISPLAY_TARGET |
 169                      PIPE_BIND_RENDER_TARGET;
 170          break;
 171       case ST_ATTACHMENT_DEPTH_STENCIL:
 172          format = xstfb->stvis.depth_stencil_format;
 173          bind = PIPE_BIND_DEPTH_STENCIL;
 174          break;
 175       default:
 176          format = PIPE_FORMAT_NONE;
 177          break;
 178       }
 179
 180       if (format != PIPE_FORMAT_NONE) {
 181          templ.format = format;
 182          templ.bind = bind;
 183
 184          xstfb->textures[i] =
 185             xstfb->screen->resource_create(xstfb->screen, &templ);
 186       }
 187    }
 188
 189    xstfb->texture_width = width;
 190    xstfb->texture_height = height;
 191    xstfb->texture_mask = mask;
 192 }
 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
 204    statt_mask = 0x0;
 205    for (i = 0; i < count; i++)
 206       statt_mask |= 1 << statts[i];
 207    /* record newly allocated textures */
 208    new_mask = statt_mask & ~xstfb->texture_mask;
 209
 210    resized = (xstfb->buffer->width != xstfb->texture_width ||
 211               xstfb->buffer->height != xstfb->texture_height);
 212
 213    /* revalidate textures */
 214    if (resized || new_mask) {
 215       xmesa_st_framebuffer_validate_textures(stfbi,
 216             xstfb->buffer->width, xstfb->buffer->height, statt_mask);
 217
 218       if (!resized) {
 219          enum st_attachment_type back, front;
 220
 221          back = ST_ATTACHMENT_BACK_LEFT;
 222          front = ST_ATTACHMENT_FRONT_LEFT;
 223          /* copy the contents if front is newly allocated and back is not */
 224          if ((statt_mask & (1 << back)) &&
 225              (new_mask & (1 << front)) &&
 226              !(new_mask & (1 << back))) {
 227             xmesa_st_framebuffer_copy_textures(stfbi, back, front,
 228                   0, 0, xstfb->texture_width, xstfb->texture_height);
 229          }
 230       }
 231    }
 232
 233    for (i = 0; i < count; i++) {
 234       out[i] = NULL;
 235       pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
 236    }
 237
 238    return TRUE;
 239 }
 240
 241 static boolean
 242 xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
 243                                  enum st_attachment_type statt)
 244 {
 245    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 246    boolean ret;
 247
 248    ret = xmesa_st_framebuffer_display(stfbi, statt);
 249    if (ret)
 250       xmesa_check_buffer_size(xstfb->buffer);
 251
 252    return ret;
 253 }
 254
 255 struct st_framebuffer_iface *
 256 xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b)
 257 {
 258    struct st_framebuffer_iface *stfbi;
 259    struct xmesa_st_framebuffer *xstfb;
 260
 261    assert(xmdpy->display == b->xm_visual->display);
 262
 263    stfbi = CALLOC_STRUCT(st_framebuffer_iface);
 264    xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
 265    if (!stfbi || !xstfb) {
 266       if (stfbi)
 267          FREE(stfbi);
 268       if (xstfb)
 269          FREE(xstfb);
 270       return NULL;
 271    }
 272
 273    xstfb->display = xmdpy;
 274    xstfb->buffer = b;
 275    xstfb->screen = xmdpy->screen;
 276    xstfb->stvis = b->xm_visual->stvis;
 277
 278    stfbi->visual = &xstfb->stvis;
 279    stfbi->flush_front = xmesa_st_framebuffer_flush_front;
 280    stfbi->validate = xmesa_st_framebuffer_validate;
 281    stfbi->st_manager_private = (void *) xstfb;
 282
 283    return stfbi;
 284 }
 285
 286 void
 287 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
 288 {
 289    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 290    int i;
 291
 292    pipe_surface_reference(&xstfb->display_surface, NULL);
 293
 294    for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
 295       pipe_resource_reference(&xstfb->textures[i], NULL);
 296
 297    FREE(xstfb);
 298    FREE(stfbi);
 299 }
 300
 301 void
 302 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
 303 {
 304    struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
 305    boolean ret;
 306
 307    ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
 308    if (ret) {
 309       struct pipe_resource **front, **back, *tmp;
 310
 311       front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
 312       back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
 313       /* swap textures only if the front texture has been allocated */
 314       if (*front) {
 315          tmp = *front;
 316          *front = *back;
 317          *back = tmp;
 318       }
 319
 320       xmesa_check_buffer_size(xstfb->buffer);
 321    }
 322 }
 323
 324 void
 325 xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
 326                           enum st_attachment_type src,
 327                           enum st_attachment_type dst,
 328                           int x, int y, int w, int h)
 329 {
 330    xmesa_st_framebuffer_copy_textures(stfbi, src, dst, x, y, w, h);
 331    if (dst == ST_ATTACHMENT_FRONT_LEFT)
 332       xmesa_st_framebuffer_display(stfbi, dst);
 333 }