Home | History | Annotate | Download | only in apple 
      1 /*
      2  Copyright (c) 2009 Apple Inc.
      3 
      4  Permission is hereby granted, free of charge, to any person
      5  obtaining a copy of this software and associated documentation files
      6  (the "Software"), to deal in the Software without restriction,
      7  including without limitation the rights to use, copy, modify, merge,
      8  publish, distribute, sublicense, and/or sell copies of the Software,
      9  and to permit persons to whom the Software is furnished to do so,
     10  subject to the following conditions:
     11 
     12  The above copyright notice and this permission notice shall be
     13  included in all copies or substantial portions of the Software.
     14 
     15  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     16  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     17  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     18  NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
     19  HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     20  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     21  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     22  DEALINGS IN THE SOFTWARE.
     23 
     24  Except as contained in this notice, the name(s) of the above
     25  copyright holders shall not be used in advertising or otherwise to
     26  promote the sale, use or other dealings in this Software without
     27  prior written authorization.
     28 */
     29 #include <assert.h>
     30 #include "glxclient.h"
     31 #include "apple_glx.h"
     32 #include "appledri.h"
     33 #include "apple_glx_drawable.h"
     34 
     35 static bool surface_make_current(struct apple_glx_context *ac,
     36                                  struct apple_glx_drawable *d);
     37 
     38 static void surface_destroy(Display * dpy, struct apple_glx_drawable *d);
     39 
     40 
     41 static struct apple_glx_drawable_callbacks callbacks = {
     42    .type = APPLE_GLX_DRAWABLE_SURFACE,
     43    .make_current = surface_make_current,
     44    .destroy = surface_destroy
     45 };
     46 
     47 static void
     48 update_viewport_and_scissor(Display * dpy, GLXDrawable drawable)
     49 {
     50    Window root;
     51    int x, y;
     52    unsigned int width = 0, height = 0, bd, depth;
     53 
     54    XGetGeometry(dpy, drawable, &root, &x, &y, &width, &height, &bd, &depth);
     55 
     56    apple_glapi_oglfw_viewport_scissor(0, 0, width, height);
     57 }
     58 
     59 static bool
     60 surface_make_current(struct apple_glx_context *ac,
     61                      struct apple_glx_drawable *d)
     62 {
     63    struct apple_glx_surface *s = &d->types.surface;
     64    xp_error error;
     65 
     66    assert(APPLE_GLX_DRAWABLE_SURFACE == d->type);
     67 
     68    apple_glx_diagnostic("%s: ac->context_obj %p s->surface_id %u\n",
     69                         __func__, (void *) ac->context_obj, s->surface_id);
     70 
     71    error = xp_attach_gl_context(ac->context_obj, s->surface_id);
     72 
     73    if (error) {
     74       fprintf(stderr, "error: xp_attach_gl_context returned: %d\n", error);
     75       return true;
     76    }
     77 
     78 
     79    if (!ac->made_current) {
     80       /*
     81        * The first time a new context is made current the glViewport
     82        * and glScissor should be updated.
     83        */
     84       update_viewport_and_scissor(ac->drawable->display,
     85                                   ac->drawable->drawable);
     86       ac->made_current = true;
     87    }
     88 
     89    apple_glx_diagnostic("%s: drawable 0x%lx\n", __func__, d->drawable);
     90 
     91    return false;
     92 }
     93 
     94 static void
     95 surface_destroy(Display * dpy, struct apple_glx_drawable *d)
     96 {
     97    struct apple_glx_surface *s = &d->types.surface;
     98 
     99    apple_glx_diagnostic("%s: s->surface_id %u\n", __func__, s->surface_id);
    100 
    101    xp_error error = xp_destroy_surface(s->surface_id);
    102 
    103    if (error) {
    104       fprintf(stderr, "xp_destroy_surface error: %d\n", (int) error);
    105    }
    106 
    107    /*
    108     * Check if this surface destroy came from the surface being destroyed
    109     * on the server.  If s->pending_destroy is true, then it did, and
    110     * we don't want to try to destroy the surface on the server.
    111     */
    112    if (!s->pending_destroy) {
    113       /*
    114        * Warning: this causes other routines to be called (potentially)
    115        * from surface_notify_handler.  It's probably best to not have
    116        * any locks at this point locked.
    117        */
    118       XAppleDRIDestroySurface(d->display, DefaultScreen(d->display),
    119                               d->drawable);
    120 
    121       apple_glx_diagnostic
    122          ("%s: destroyed a surface for drawable 0x%lx uid %u\n", __func__,
    123           d->drawable, s->uid);
    124    }
    125 }
    126 
    127 /* Return true if an error occured. */
    128 static bool
    129 create_surface(Display * dpy, int screen, struct apple_glx_drawable *d)
    130 {
    131    struct apple_glx_surface *s = &d->types.surface;
    132    unsigned int key[2];
    133    xp_client_id id;
    134 
    135    id = apple_glx_get_client_id();
    136    if (0 == id)
    137       return true;
    138 
    139    assert(None != d->drawable);
    140 
    141    s->pending_destroy = false;
    142 
    143    if (XAppleDRICreateSurface(dpy, screen, d->drawable, id, key, &s->uid)) {
    144       xp_error error;
    145 
    146       error = xp_import_surface(key, &s->surface_id);
    147 
    148       if (error) {
    149          fprintf(stderr, "error: xp_import_surface returned: %d\n", error);
    150          return true;
    151       }
    152 
    153       apple_glx_diagnostic("%s: created a surface for drawable 0x%lx"
    154                            " with uid %u\n", __func__, d->drawable, s->uid);
    155       return false;             /*success */
    156    }
    157 
    158    return true;                 /* unable to create a surface. */
    159 }
    160 
    161 /* Return true if an error occured. */
    162 /* This returns a referenced object via resultptr. */
    163 bool
    164 apple_glx_surface_create(Display * dpy, int screen,
    165                          GLXDrawable drawable,
    166                          struct apple_glx_drawable ** resultptr)
    167 {
    168    struct apple_glx_drawable *d;
    169 
    170    if (apple_glx_drawable_create(dpy, screen, drawable, &d, &callbacks))
    171       return true;
    172 
    173    /* apple_glx_drawable_create creates a locked and referenced object. */
    174 
    175    if (create_surface(dpy, screen, d)) {
    176       d->unlock(d);
    177       d->destroy(d);
    178       return true;
    179    }
    180 
    181    *resultptr = d;
    182 
    183    d->unlock(d);
    184 
    185    return false;
    186 }
    187 
    188 /*
    189  * All surfaces are reference counted, and surfaces are only created
    190  * when the window is made current.  When all contexts no longer reference
    191  * a surface drawable the apple_glx_drawable gets destroyed, and thus
    192  * its surface is destroyed.
    193  *
    194  * However we can make the destruction occur a bit sooner by setting
    195  * pending_destroy, which is then checked for in glViewport by
    196  * apple_glx_context_update.
    197  */
    198 void
    199 apple_glx_surface_destroy(unsigned int uid)
    200 {
    201    struct apple_glx_drawable *d;
    202 
    203    d = apple_glx_drawable_find_by_uid(uid, APPLE_GLX_DRAWABLE_REFERENCE
    204                                       | APPLE_GLX_DRAWABLE_LOCK);
    205 
    206    if (d) {
    207       d->types.surface.pending_destroy = true;
    208       d->release(d);
    209 
    210       /*
    211        * We release 2 references to the surface.  One was acquired by
    212        * the find, and the other was leftover from a context, or
    213        * the surface being displayed, so the destroy() will decrease it
    214        * once more.
    215        *
    216        * If the surface is in a context, it will take one d->destroy(d);
    217        * to actually destroy it when the pending_destroy is processed
    218        * by a glViewport callback (see apple_glx_context_update()).
    219        */
    220       if (!d->destroy(d)) {
    221           /* apple_glx_drawable_find_by_uid returns a locked drawable */
    222           d->unlock(d);
    223       }
    224    }
    225 }
    226