clutter/osx/clutter-backend-osx.c

   1 /* Clutter -  An OpenGL based 'interactive canvas' library.
   2  * OSX backend - initial entry point
   3  *
   4  * Copyright (C) 2007-2008  Tommi Komulainen <tommi.komulainen@iki.fi>
   5  * Copyright (C) 2007  OpenedHand Ltd.
   6  * Copyright (C) 2011  Crystalnix <vgachkaylo@crystalnix.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  20  *
  21  *
  22  */
  23 #include "config.h"
  24
  25 #include "clutter-osx.h"
  26
  27 #include "clutter-backend-osx.h"
  28 #include "clutter-device-manager-osx.h"
  29 #include "clutter-shader.h"
  30 #include "clutter-stage-osx.h"
  31 #include "clutter-event-loop-osx.h"
  32
  33 #include "clutter-debug.h"
  34 #include "clutter-private.h"
  35 #include "clutter-stage-private.h"
  36
  37 #include "cogl/cogl.h"
  38
  39 #import <AppKit/AppKit.h>
  40
  41 #define DEFAULT_FONT_NAME       "Lucida Grande 13"
  42
  43 #define clutter_backend_osx_get_type    _clutter_backend_osx_get_type
  44
  45 G_DEFINE_TYPE (ClutterBackendOSX, clutter_backend_osx, CLUTTER_TYPE_BACKEND)
  46
  47 /*************************************************************************/
  48 static gboolean
  49 clutter_backend_osx_post_parse (ClutterBackend  *backend,
  50                                 GError         **error)
  51 {
  52   ClutterSettings *settings = clutter_settings_get_default ();
  53
  54   CLUTTER_OSX_POOL_ALLOC();
  55   /* getting standart dpi for main screen */
  56   NSDictionary* prop = [[NSScreen mainScreen] deviceDescription];
  57   NSSize size;
  58   [[prop valueForKey:@"NSDeviceResolution"] getValue:&size];
  59   CLUTTER_OSX_POOL_RELEASE();
  60
  61   /* setting dpi for backend, it needs by font rendering library */
  62   if (size.height > 0)
  63     {
  64       int font_dpi = size.height * 1024;
  65
  66       g_object_set (settings, "font-dpi", font_dpi, NULL);
  67     }
  68
  69   /* set the default font name */
  70   g_object_set (settings, "font-name", DEFAULT_FONT_NAME, NULL);
  71
  72   /* finish launching the application */
  73   [NSApp finishLaunching];
  74
  75   return TRUE;
  76 }
  77
  78 static ClutterFeatureFlags
  79 clutter_backend_osx_get_features (ClutterBackend *backend)
  80 {
  81   return CLUTTER_FEATURE_STAGE_MULTIPLE
  82        | CLUTTER_FEATURE_STAGE_USER_RESIZE;
  83 }
  84
  85 void
  86 _clutter_backend_osx_events_init (ClutterBackend *backend)
  87 {
  88   ClutterBackendOSX *backend_osx = CLUTTER_BACKEND_OSX (backend);
  89
  90   if (backend_osx->device_manager != NULL)
  91     return;
  92
  93   CLUTTER_NOTE (BACKEND, "init_events");
  94
  95   backend->device_manager = backend_osx->device_manager =
  96     g_object_new (CLUTTER_TYPE_DEVICE_MANAGER_OSX,
  97                   "backend", CLUTTER_BACKEND(backend_osx),
  98                   NULL);
  99
 100   _clutter_osx_event_loop_init ();
 101 }
 102
 103 static gboolean
 104 clutter_backend_osx_create_context (ClutterBackend  *backend,
 105                                     GError         **error)
 106 {
 107   ClutterBackendOSX *backend_osx = CLUTTER_BACKEND_OSX (backend);
 108
 109   CLUTTER_OSX_POOL_ALLOC();
 110
 111   if (backend_osx->context == nil)
 112     {
 113       /* Allocate ourselves a GL context. Since we're supposed to have
 114        * only one per backend we can just as well create it now.
 115        */
 116       NSOpenGLPixelFormatAttribute attrs[] = {
 117         NSOpenGLPFADoubleBuffer,
 118         NSOpenGLPFADepthSize, 32,
 119         NSOpenGLPFAStencilSize, 8,
 120         0
 121       };
 122
 123 #ifdef MAC_OS_X_VERSION_10_5
 124       const int sw = 1;
 125 #else
 126       const long sw = 1;
 127 #endif
 128
 129       backend_osx->pixel_format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
 130
 131       backend_osx->context = [[NSOpenGLContext alloc] initWithFormat: backend_osx->pixel_format
 132                                                         shareContext: nil];
 133
 134       /* Enable vblank sync - http://developer.apple.com/qa/qa2007/qa1521.html */
 135       [backend_osx->context setValues:&sw forParameter: NSOpenGLCPSwapInterval];
 136
 137       CLUTTER_NOTE (BACKEND, "Context was created");
 138     }
 139
 140   [backend_osx->context makeCurrentContext];
 141
 142   CLUTTER_OSX_POOL_RELEASE();
 143
 144   return TRUE;
 145 }
 146
 147 static void
 148 clutter_backend_osx_ensure_context (ClutterBackend *backend,
 149                                     ClutterStage   *wrapper)
 150 {
 151   ClutterBackendOSX *backend_osx = CLUTTER_BACKEND_OSX (backend);
 152
 153   CLUTTER_OSX_POOL_ALLOC();
 154
 155   CLUTTER_NOTE (BACKEND, "ensure_context: wrapper=%p", wrapper);
 156
 157   if (wrapper)
 158     {
 159       ClutterStageWindow *impl = _clutter_stage_get_window (wrapper);
 160       ClutterStageOSX *stage_osx;
 161
 162       g_assert (CLUTTER_IS_STAGE_OSX (impl));
 163       stage_osx = CLUTTER_STAGE_OSX (impl);
 164
 165       [backend_osx->context clearDrawable];
 166       [backend_osx->context setView:stage_osx->view];
 167       [backend_osx->context makeCurrentContext];
 168     }
 169   else
 170     {
 171       [backend_osx->context clearDrawable];
 172       [NSOpenGLContext clearCurrentContext];
 173     }
 174
 175   CLUTTER_OSX_POOL_RELEASE();
 176 }
 177
 178 /*************************************************************************/
 179
 180 static void
 181 clutter_backend_osx_init (ClutterBackendOSX *backend_osx)
 182 {
 183   const ProcessSerialNumber psn = { 0, kCurrentProcess };
 184
 185   backend_osx->context = nil;
 186   backend_osx->pixel_format = nil;
 187
 188   /* Bring our app to foreground, background apps don't appear in dock or
 189    * accept keyboard focus.
 190    */
 191   TransformProcessType (&psn, kProcessTransformToForegroundApplication);
 192
 193   /* Also raise our app to front, otherwise our window will remain under the
 194    * terminal.
 195    */
 196   SetFrontProcess (&psn);
 197
 198   [NSApplication sharedApplication];
 199 }
 200
 201 static void
 202 clutter_backend_osx_dispose (GObject *object)
 203 {
 204   ClutterBackendOSX *self = CLUTTER_BACKEND_OSX (object);
 205
 206   [self->context release];
 207   self->context = NULL;
 208
 209   [self->pixel_format release];
 210   self->pixel_format = NULL;
 211
 212   G_OBJECT_CLASS (clutter_backend_osx_parent_class)->dispose (object);
 213 }
 214
 215 static void
 216 clutter_backend_osx_class_init (ClutterBackendOSXClass *klass)
 217 {
 218   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 219   ClutterBackendClass *backend_class = CLUTTER_BACKEND_CLASS (klass);
 220
 221   object_class->dispose = clutter_backend_osx_dispose;
 222
 223   backend_class->stage_window_type = CLUTTER_TYPE_STAGE_OSX;
 224
 225   backend_class->post_parse         = clutter_backend_osx_post_parse;
 226   backend_class->get_features       = clutter_backend_osx_get_features;
 227   backend_class->create_context     = clutter_backend_osx_create_context;
 228   backend_class->ensure_context     = clutter_backend_osx_ensure_context;
 229 }