modules/video_output/win32/glwin32.c

   1 /*****************************************************************************
   2  * glwin32.c: Windows OpenGL provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2009 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Gildas Bazin <gbazin@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 # include "config.h"
  25 #endif
  26
  27 #include <assert.h>
  28
  29 #include <vlc_common.h>
  30 #include <vlc_plugin.h>
  31 #include <vlc_vout_display.h>
  32
  33 #include <windows.h>
  34 #include <versionhelpers.h>
  35
  36 #define GLEW_STATIC
  37 #include "../opengl/vout_helper.h"
  38 #include <GL/wglew.h>
  39
  40 #include "common.h"
  41
  42 /*****************************************************************************
  43  * Module descriptor
  44  *****************************************************************************/
  45 static int  Open (vlc_object_t *);
  46 static void Close(vlc_object_t *);
  47
  48 vlc_module_begin()
  49     set_category(CAT_VIDEO)
  50     set_subcategory(SUBCAT_VIDEO_VOUT)
  51     set_shortname("OpenGL")
  52     set_description(N_("OpenGL video output for Windows"))
  53     set_capability("vout display", 275)
  54     add_shortcut("glwin32", "opengl")
  55     set_callbacks(Open, Close)
  56     add_glopts()
  57 vlc_module_end()
  58
  59 /*****************************************************************************
  60  * Local prototypes.
  61  *****************************************************************************/
  62 struct vout_display_sys_t
  63 {
  64     vout_display_sys_win32_t sys;
  65
  66     vlc_gl_t              *gl;
  67     vout_display_opengl_t *vgl;
  68 };
  69
  70 static picture_pool_t *Pool  (vout_display_t *, unsigned);
  71 static void           Prepare(vout_display_t *, picture_t *, subpicture_t *, vlc_tick_t);
  72 static void           Display(vout_display_t *, picture_t *, subpicture_t *);
  73 static void           Manage (vout_display_t *);
  74
  75 static int Control(vout_display_t *vd, int query, va_list args)
  76 {
  77     vout_display_sys_t *sys = vd->sys;
  78
  79     if (query == VOUT_DISPLAY_CHANGE_VIEWPOINT)
  80         return vout_display_opengl_SetViewpoint(sys->vgl,
  81             &va_arg (args, const vout_display_cfg_t* )->viewpoint);
  82
  83     return CommonControl(vd, query, args);
  84 }
  85
  86 static int EmbedVideoWindow_Control(vout_window_t *wnd, int query, va_list ap)
  87 {
  88     VLC_UNUSED( ap ); VLC_UNUSED( query );
  89     return VLC_EGENERIC;
  90 }
  91
  92 static vout_window_t *EmbedVideoWindow_Create(vout_display_t *vd)
  93 {
  94     vout_display_sys_t *sys = vd->sys;
  95
  96     if (!sys->sys.hvideownd)
  97         return NULL;
  98
  99     vout_window_t *wnd = vlc_object_create(vd, sizeof(vout_window_t));
 100     if (!wnd)
 101         return NULL;
 102
 103     wnd->type = VOUT_WINDOW_TYPE_HWND;
 104     wnd->handle.hwnd = sys->sys.hvideownd;
 105     wnd->control = EmbedVideoWindow_Control;
 106     return wnd;
 107 }
 108
 109 /**
 110  * It creates an OpenGL vout display.
 111  */
 112 static int Open(vlc_object_t *object)
 113 {
 114     vout_display_t *vd = (vout_display_t *)object;
 115     vout_display_sys_t *sys;
 116
 117     /* do not use OpenGL on XP unless forced */
 118     if(!object->obj.force && !IsWindowsVistaOrGreater())
 119         return VLC_EGENERIC;
 120
 121     /* Allocate structure */
 122     vd->sys = sys = calloc(1, sizeof(*sys));
 123     if (!sys)
 124         return VLC_ENOMEM;
 125
 126     /* */
 127     if (CommonInit(vd))
 128         goto error;
 129
 130     EventThreadUpdateTitle(sys->sys.event, VOUT_TITLE " (OpenGL output)");
 131
 132     vout_window_t *surface = EmbedVideoWindow_Create(vd);
 133     if (!surface)
 134         goto error;
 135
 136     char *modlist = var_InheritString(surface, "gl");
 137     sys->gl = vlc_gl_Create (surface, VLC_OPENGL, modlist);
 138     free(modlist);
 139     if (!sys->gl)
 140     {
 141         vlc_object_release(surface);
 142         goto error;
 143     }
 144
 145     vlc_gl_Resize (sys->gl, vd->cfg->display.width, vd->cfg->display.height);
 146
 147     video_format_t fmt = vd->fmt;
 148     const vlc_fourcc_t *subpicture_chromas;
 149     if (vlc_gl_MakeCurrent (sys->gl))
 150         goto error;
 151     sys->vgl = vout_display_opengl_New(&fmt, &subpicture_chromas, sys->gl,
 152                                        &vd->cfg->viewpoint);
 153     vlc_gl_ReleaseCurrent (sys->gl);
 154     if (!sys->vgl)
 155         goto error;
 156
 157     vout_display_info_t info = vd->info;
 158     info.has_double_click = true;
 159     info.subpicture_chromas = subpicture_chromas;
 160
 161    /* Setup vout_display now that everything is fine */
 162     vd->fmt  = fmt;
 163     vd->info = info;
 164
 165     vd->pool    = Pool;
 166     vd->prepare = Prepare;
 167     vd->display = Display;
 168     vd->control = Control;
 169
 170     return VLC_SUCCESS;
 171
 172 error:
 173     Close(object);
 174     return VLC_EGENERIC;
 175 }
 176
 177 /**
 178  * It destroys an OpenGL vout display.
 179  */
 180 static void Close(vlc_object_t *object)
 181 {
 182     vout_display_t *vd = (vout_display_t *)object;
 183     vout_display_sys_t *sys = vd->sys;
 184     vlc_gl_t *gl = sys->gl;
 185
 186     if (gl)
 187     {
 188         vout_window_t *surface = gl->surface;
 189         if (sys->vgl)
 190         {
 191             vlc_gl_MakeCurrent (gl);
 192             vout_display_opengl_Delete(sys->vgl);
 193             vlc_gl_ReleaseCurrent (gl);
 194         }
 195         vlc_gl_Release (gl);
 196         vlc_object_release(surface);
 197     }
 198
 199     CommonClean(vd);
 200
 201     free(sys);
 202 }
 203
 204 /* */
 205 static picture_pool_t *Pool(vout_display_t *vd, unsigned count)
 206 {
 207     vout_display_sys_t *sys = vd->sys;
 208
 209     if (!sys->sys.pool && vlc_gl_MakeCurrent (sys->gl) == VLC_SUCCESS)
 210     {
 211         sys->sys.pool = vout_display_opengl_GetPool(sys->vgl, count);
 212         vlc_gl_ReleaseCurrent (sys->gl);
 213     }
 214     return sys->sys.pool;
 215 }
 216
 217 static void Prepare(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture,
 218                     vlc_tick_t date)
 219 {
 220     Manage(vd);
 221     VLC_UNUSED(date);
 222     vout_display_sys_t *sys = vd->sys;
 223
 224     if (vlc_gl_MakeCurrent (sys->gl) == VLC_SUCCESS)
 225     {
 226         vout_display_opengl_Prepare (sys->vgl, picture, subpicture);
 227         vlc_gl_ReleaseCurrent (sys->gl);
 228     }
 229 }
 230
 231 static void Display(vout_display_t *vd, picture_t *picture, subpicture_t *subpicture)
 232 {
 233     vout_display_sys_t *sys = vd->sys;
 234
 235     if (vlc_gl_MakeCurrent (sys->gl) == VLC_SUCCESS)
 236     {
 237         vout_display_opengl_Display (sys->vgl, &vd->source);
 238         vlc_gl_ReleaseCurrent (sys->gl);
 239     }
 240
 241     picture_Release(picture);
 242     if (subpicture)
 243         subpicture_Delete(subpicture);
 244
 245     CommonDisplay(vd);
 246 }
 247
 248 static void Manage (vout_display_t *vd)
 249 {
 250     vout_display_sys_t *sys = vd->sys;
 251
 252     CommonManage(vd);
 253
 254     const int width  = sys->sys.rect_dest.right  - sys->sys.rect_dest.left;
 255     const int height = sys->sys.rect_dest.bottom - sys->sys.rect_dest.top;
 256     vlc_gl_Resize (sys->gl, width, height);
 257     if (vlc_gl_MakeCurrent (sys->gl) != VLC_SUCCESS)
 258         return;
 259     vout_display_opengl_SetWindowAspectRatio(sys->vgl, (float)width / height);
 260     vout_display_opengl_Viewport(sys->vgl, 0, 0, width, height);
 261     vlc_gl_ReleaseCurrent (sys->gl);
 262 }