1e8121b44a543bef668ca9c5099697a97e769ef3
[vlc.git] / modules / video_output / opengl.c
1 /*****************************************************************************
2  * opengl.c: OpenGL video output
3  *****************************************************************************
4  * Copyright (C) 2004 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Cyril Deguet <asmax@videolan.org>
8  *          Gildas Bazin <gbazin@videolan.org>
9  *          Eric Petit <titer@m0k.org>
10  *          Cedric Cocquebert <cedric.cocquebert@supelec.fr>
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25  *****************************************************************************/
26
27 /*****************************************************************************
28  * Preamble
29  *****************************************************************************/
30
31 #ifdef HAVE_CONFIG_H
32 # include "config.h"
33 #endif
34
35 #include <errno.h>                                                 /* ENOMEM */
36
37 #include <vlc_common.h>
38 #include <vlc_plugin.h>
39 #include <vlc_vout.h>
40
41 #ifdef __APPLE__
42 #include <OpenGL/gl.h>
43 #include <OpenGL/glext.h>
44
45 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
46    This allows sizes which are not powers of 2 */
47 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
48
49 /* OS X OpenGL supports YUV. Hehe. */
50 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
51 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
52 #else
53
54 #include <GL/gl.h>
55 #define VLCGL_TARGET GL_TEXTURE_2D
56
57 /* RV16 */
58 #ifndef GL_UNSIGNED_SHORT_5_6_5
59 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
60 #endif
61 //#define VLCGL_RGB_FORMAT GL_RGB
62 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
63
64 /* RV24 */
65 //#define VLCGL_RGB_FORMAT GL_RGB
66 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
67
68 /* RV32 */
69 #define VLCGL_RGB_FORMAT GL_RGBA
70 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
71
72 /* YUY2 */
73 #ifndef YCBCR_MESA
74 #define YCBCR_MESA 0x8757
75 #endif
76 #ifndef UNSIGNED_SHORT_8_8_MESA
77 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
78 #endif
79 #define VLCGL_YUV_FORMAT YCBCR_MESA
80 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
81
82 /* Use RGB on Win32/GLX */
83 #define VLCGL_FORMAT VLCGL_RGB_FORMAT
84 #define VLCGL_TYPE   VLCGL_RGB_TYPE
85 //#define VLCGL_FORMAT VLCGL_YUV_FORMAT
86 //#define VLCGL_TYPE   VLCGL_YUV_TYPE
87 #endif
88
89 #ifndef GL_CLAMP_TO_EDGE
90 #   define GL_CLAMP_TO_EDGE 0x812F
91 #endif
92
93 /*****************************************************************************
94  * Vout interface
95  *****************************************************************************/
96 static int  CreateVout   ( vlc_object_t * );
97 static void DestroyVout  ( vlc_object_t * );
98 static int  Init         ( vout_thread_t * );
99 static void End          ( vout_thread_t * );
100 static int  Manage       ( vout_thread_t * );
101 static void Render       ( vout_thread_t *, picture_t * );
102 static void DisplayVideo ( vout_thread_t *, picture_t * );
103 static int  Control      ( vout_thread_t *, int, va_list );
104
105 static inline int GetAlignedSize( int );
106
107 static int InitTextures  ( vout_thread_t * );
108 static int SendEvents    ( vlc_object_t *, char const *,
109                            vlc_value_t, vlc_value_t, void * );
110
111 #define PROVIDER_TEXT N_("OpenGL Provider")
112 #define PROVIDER_LONGTEXT N_("Allows you to modify what OpenGL provider should be used")
113
114 vlc_module_begin ()
115     set_shortname( "OpenGL" )
116     set_category( CAT_VIDEO )
117     set_subcategory( SUBCAT_VIDEO_VOUT )
118     set_description( N_("OpenGL video output") )
119 #ifdef __APPLE__
120     set_capability( "video output", 200 )
121 #else
122     set_capability( "video output", 20 )
123 #endif
124     add_shortcut( "opengl" )
125     /* Allow opengl provider plugin selection */
126     add_string( "opengl-provider", "default", NULL, PROVIDER_TEXT, 
127                     PROVIDER_LONGTEXT, true )
128     set_callbacks( CreateVout, DestroyVout )
129 vlc_module_end ()
130
131 /*****************************************************************************
132  * vout_sys_t: video output method descriptor
133  *****************************************************************************
134  * This structure is part of the video output thread descriptor.
135  * It describes the OpenGL specific properties of the output thread.
136  *****************************************************************************/
137 struct vout_sys_t
138 {
139     vout_thread_t *p_vout;
140
141     uint8_t    *pp_buffer[2];
142     int         i_index;
143     int         i_tex_width;
144     int         i_tex_height;
145     GLuint      p_textures[2];
146 };
147
148 /*****************************************************************************
149  * CreateVout: This function allocates and initializes the OpenGL vout method.
150  *****************************************************************************/
151 static int CreateVout( vlc_object_t *p_this )
152 {
153     vout_thread_t *p_vout = (vout_thread_t *)p_this;
154     vout_sys_t *p_sys;
155     char * psz;
156
157     /* Allocate structure */
158     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
159     if( p_sys == NULL )
160         return VLC_ENOMEM;
161
162     p_sys->i_index = 0;
163 #ifdef __APPLE__
164     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
165     p_sys->i_tex_height = p_vout->fmt_in.i_height;
166 #else
167     /* A texture must have a size aligned on a power of 2 */
168     p_sys->i_tex_width  = GetAlignedSize( p_vout->fmt_in.i_width );
169     p_sys->i_tex_height = GetAlignedSize( p_vout->fmt_in.i_height );
170 #endif
171
172     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
173              p_sys->i_tex_height );
174
175     /* Get window */
176     p_sys->p_vout =
177         (vout_thread_t *)vlc_object_create( p_this, sizeof( vout_thread_t ) );
178     if( p_sys->p_vout == NULL )
179     {
180         free( p_sys );
181         return VLC_ENOMEM;
182     }
183     vlc_object_attach( p_sys->p_vout, p_this );
184
185     p_sys->p_vout->i_window_width = p_vout->i_window_width;
186     p_sys->p_vout->i_window_height = p_vout->i_window_height;
187     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
188     p_sys->p_vout->render.i_width = p_vout->render.i_width;
189     p_sys->p_vout->render.i_height = p_vout->render.i_height;
190     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
191     p_sys->p_vout->fmt_render = p_vout->fmt_render;
192     p_sys->p_vout->fmt_in = p_vout->fmt_in;
193     p_sys->p_vout->b_scale = p_vout->b_scale;
194     p_sys->p_vout->i_alignment = p_vout->i_alignment;
195
196     psz = config_GetPsz( p_vout, "opengl-provider" );
197
198     msg_Dbg( p_vout, "requesting \"%s\" opengl provider",
199                       psz ? psz : "default" );
200
201     p_sys->p_vout->p_module =
202         module_need( p_sys->p_vout, "opengl provider", psz, false );
203     free( psz );
204     if( p_sys->p_vout->p_module == NULL )
205     {
206         msg_Warn( p_vout, "No OpenGL provider found" );
207         vlc_object_detach( p_sys->p_vout );
208         vlc_object_release( p_sys->p_vout );
209         return VLC_ENOOBJ;
210     }
211
212     p_vout->pf_init = Init;
213     p_vout->pf_end = End;
214     p_vout->pf_manage = Manage;
215     p_vout->pf_render = Render;
216     p_vout->pf_display = DisplayVideo;
217     p_vout->pf_control = Control;
218
219     /* Forward events from the opengl provider */
220     var_Create( p_sys->p_vout, "mouse-x", VLC_VAR_INTEGER );
221     var_Create( p_sys->p_vout, "mouse-y", VLC_VAR_INTEGER );
222     var_Create( p_sys->p_vout, "mouse-moved", VLC_VAR_BOOL );
223     var_Create( p_sys->p_vout, "mouse-clicked", VLC_VAR_BOOL );
224     var_Create( p_sys->p_vout, "mouse-button-down", VLC_VAR_INTEGER );
225     var_Create( p_sys->p_vout, "video-on-top",
226                 VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
227
228     var_AddCallback( p_sys->p_vout, "mouse-x", SendEvents, p_vout );
229     var_AddCallback( p_sys->p_vout, "mouse-y", SendEvents, p_vout );
230     var_AddCallback( p_sys->p_vout, "mouse-moved", SendEvents, p_vout );
231     var_AddCallback( p_sys->p_vout, "mouse-clicked", SendEvents, p_vout );
232     var_AddCallback( p_sys->p_vout, "mouse-button-down", SendEvents, p_vout );
233
234     return VLC_SUCCESS;
235 }
236
237 /*****************************************************************************
238  * Init: initialize the OpenGL video thread output method
239  *****************************************************************************/
240 static int Init( vout_thread_t *p_vout )
241 {
242     vout_sys_t *p_sys = p_vout->p_sys;
243     int i_pixel_pitch;
244
245     p_sys->p_vout->pf_init( p_sys->p_vout );
246
247 /* TODO: We use YCbCr on Mac which is Y422, but on OSX it seems to == YUY2. Verify */
248 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
249     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
250     i_pixel_pitch = 2;
251
252 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
253     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
254     i_pixel_pitch = 2;
255
256 #elif VLCGL_FORMAT == GL_RGB
257 #   if VLCGL_TYPE == GL_UNSIGNED_BYTE
258     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
259 #       if defined( WORDS_BIGENDIAN )
260     p_vout->output.i_rmask = 0x00ff0000;
261     p_vout->output.i_gmask = 0x0000ff00;
262     p_vout->output.i_bmask = 0x000000ff;
263 #       else
264     p_vout->output.i_rmask = 0x000000ff;
265     p_vout->output.i_gmask = 0x0000ff00;
266     p_vout->output.i_bmask = 0x00ff0000;
267 #       endif
268     i_pixel_pitch = 3;
269 #   else
270     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
271 #       if defined( WORDS_BIGENDIAN )
272     p_vout->output.i_rmask = 0x001f;
273     p_vout->output.i_gmask = 0x07e0;
274     p_vout->output.i_bmask = 0xf800;
275 #       else
276     p_vout->output.i_rmask = 0xf800;
277     p_vout->output.i_gmask = 0x07e0;
278     p_vout->output.i_bmask = 0x001f;
279 #       endif
280     i_pixel_pitch = 2;
281 #   endif
282 #else
283     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
284 #       if defined( WORDS_BIGENDIAN )
285     p_vout->output.i_rmask = 0xff000000;
286     p_vout->output.i_gmask = 0x00ff0000;
287     p_vout->output.i_bmask = 0x0000ff00;
288 #       else
289     p_vout->output.i_rmask = 0x000000ff;
290     p_vout->output.i_gmask = 0x0000ff00;
291     p_vout->output.i_bmask = 0x00ff0000;
292 #       endif
293     i_pixel_pitch = 4;
294 #endif
295
296     /* Since OpenGL can do rescaling for us, stick to the default
297      * coordinates and aspect. */
298     p_vout->output.i_width  = p_vout->render.i_width;
299     p_vout->output.i_height = p_vout->render.i_height;
300     p_vout->output.i_aspect = p_vout->render.i_aspect;
301
302     p_vout->fmt_out = p_vout->fmt_in;
303     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
304
305     /* We know the chroma, allocate one buffer which will be used
306      * directly by the decoder */
307     p_sys->pp_buffer[0] =
308         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
309     if( !p_sys->pp_buffer[0] )
310         return -1;
311     p_sys->pp_buffer[1] =
312         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
313     if( !p_sys->pp_buffer[1] )
314         return -1;
315
316     p_vout->p_picture[0].i_planes = 1;
317     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
318     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
319     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
320     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
321     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
322         p_vout->p_picture[0].p->i_pixel_pitch;
323     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
324         p_vout->p_picture[0].p->i_pixel_pitch;
325
326     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
327     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
328
329     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
330
331     I_OUTPUTPICTURES = 1;
332
333     if( p_sys->p_vout->pf_lock &&
334         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
335     {
336         msg_Warn( p_vout, "could not lock OpenGL provider" );
337         return 0;
338     }
339
340     InitTextures( p_vout );
341
342     glDisable(GL_BLEND);
343     glDisable(GL_DEPTH_TEST);
344     glDepthMask(GL_FALSE);
345     glDisable(GL_CULL_FACE);
346     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
347     glClear( GL_COLOR_BUFFER_BIT );
348
349     if( p_sys->p_vout->pf_unlock )
350     {
351         p_sys->p_vout->pf_unlock( p_sys->p_vout );
352     }
353
354     return 0;
355 }
356
357 /*****************************************************************************
358  * End: terminate GLX video thread output method
359  *****************************************************************************/
360 static void End( vout_thread_t *p_vout )
361 {
362     vout_sys_t *p_sys = p_vout->p_sys;
363
364     if( p_sys->p_vout->pf_lock &&
365         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
366     {
367         msg_Warn( p_vout, "could not lock OpenGL provider" );
368         return;
369     }
370
371     glFinish();
372     glFlush();
373
374     /* Free the texture buffer*/
375     glDeleteTextures( 2, p_sys->p_textures );
376     free( p_sys->pp_buffer[0] );
377     free( p_sys->pp_buffer[1] );
378
379     if( p_sys->p_vout->pf_unlock )
380     {
381         p_sys->p_vout->pf_unlock( p_sys->p_vout );
382     }
383 }
384
385 /*****************************************************************************
386  * Destroy: destroy GLX video thread output method
387  *****************************************************************************
388  * Terminate an output method created by CreateVout
389  *****************************************************************************/
390 static void DestroyVout( vlc_object_t *p_this )
391 {
392     vout_thread_t *p_vout = (vout_thread_t *)p_this;
393     vout_sys_t *p_sys = p_vout->p_sys;
394
395     module_unneed( p_sys->p_vout, p_sys->p_vout->p_module );
396     vlc_object_release( p_sys->p_vout );
397
398     free( p_sys );
399 }
400
401 /*****************************************************************************
402  * Manage: handle Sys events
403  *****************************************************************************
404  * This function should be called regularly by video output thread. It returns
405  * a non null value if an error occurred.
406  *****************************************************************************/
407 static int Manage( vout_thread_t *p_vout )
408 {
409     vout_sys_t *p_sys = p_vout->p_sys;
410     int i_ret, i_fullscreen_change;
411
412     i_fullscreen_change = ( p_vout->i_changes & VOUT_FULLSCREEN_CHANGE );
413
414     p_vout->fmt_out.i_x_offset = p_sys->p_vout->fmt_in.i_x_offset =
415         p_vout->fmt_in.i_x_offset;
416     p_vout->fmt_out.i_y_offset = p_sys->p_vout->fmt_in.i_y_offset =
417         p_vout->fmt_in.i_y_offset;
418     p_vout->fmt_out.i_visible_width = p_sys->p_vout->fmt_in.i_visible_width =
419         p_vout->fmt_in.i_visible_width;
420     p_vout->fmt_out.i_visible_height = p_sys->p_vout->fmt_in.i_visible_height =
421         p_vout->fmt_in.i_visible_height;
422     p_vout->fmt_out.i_aspect = p_sys->p_vout->fmt_in.i_aspect =
423         p_vout->fmt_in.i_aspect;
424     p_vout->fmt_out.i_sar_num = p_sys->p_vout->fmt_in.i_sar_num =
425         p_vout->fmt_in.i_sar_num;
426     p_vout->fmt_out.i_sar_den = p_sys->p_vout->fmt_in.i_sar_den =
427         p_vout->fmt_in.i_sar_den;
428     p_vout->output.i_aspect = p_vout->fmt_in.i_aspect;
429
430     p_sys->p_vout->i_changes = p_vout->i_changes;
431     i_ret = p_sys->p_vout->pf_manage( p_sys->p_vout );
432     p_vout->i_changes = p_sys->p_vout->i_changes;
433
434 #ifdef __APPLE__
435     if( p_sys->p_vout->pf_lock &&
436         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
437     {
438         msg_Warn( p_vout, "could not lock OpenGL provider" );
439         return i_ret;
440     }
441
442     /* On OS X, we create the window and the GL view when entering
443        fullscreen - the textures have to be inited again */
444     if( i_fullscreen_change )
445     {
446         InitTextures( p_vout );
447     }
448
449     if( p_sys->p_vout->pf_unlock )
450     {
451         p_sys->p_vout->pf_unlock( p_sys->p_vout );
452     }
453 #endif
454 // to align in real time in OPENGL
455     if (p_sys->p_vout->i_alignment != p_vout->i_alignment)
456     {
457         p_vout->i_changes = VOUT_CROP_CHANGE;        //to force change
458         p_sys->p_vout->i_alignment = p_vout->i_alignment;    
459     }
460     return i_ret;
461 }
462
463 /*****************************************************************************
464  * Render: render previously calculated output
465  *****************************************************************************/
466 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
467 {
468     VLC_UNUSED(p_pic);
469     vout_sys_t *p_sys = p_vout->p_sys;
470
471     /* On Win32/GLX, we do this the usual way:
472        + Fill the buffer with new content,
473        + Reload the texture,
474        + Use the texture.
475
476        On OS X with VRAM or AGP texturing, the order has to be:
477        + Reload the texture,
478        + Fill the buffer with new content,
479        + Use the texture.
480
481        (Thanks to gcc from the Arstechnica forums for the tip)
482
483        Therefore, we have to use two buffers and textures. On Win32/GLX,
484        we reload the texture to be displayed and use it right away. On
485        OS X, we first render, then reload the texture to be used next
486        time. */
487
488     if( p_sys->p_vout->pf_lock &&
489         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
490     {
491         msg_Warn( p_vout, "could not lock OpenGL provider" );
492         return;
493     }
494
495 #ifdef __APPLE__
496     int i_new_index;
497     i_new_index = ( p_sys->i_index + 1 ) & 1;
498
499
500     /* Update the texture */
501     glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
502     glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
503                      p_vout->fmt_out.i_width,
504                      p_vout->fmt_out.i_height,
505                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
506
507     /* Bind to the previous texture for drawing */
508     glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
509
510     /* Switch buffers */
511     p_sys->i_index = i_new_index;
512     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
513
514 #else
515     /* Update the texture */
516     glTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0,
517                      p_vout->fmt_out.i_width,
518                      p_vout->fmt_out.i_height,
519                      VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[0] );
520 #endif
521
522     if( p_sys->p_vout->pf_unlock )
523     {
524         p_sys->p_vout->pf_unlock( p_sys->p_vout );
525     }
526 }
527
528 /*****************************************************************************
529  * DisplayVideo: displays previously rendered output
530  *****************************************************************************/
531 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
532 {
533     VLC_UNUSED(p_pic);
534     vout_sys_t *p_sys = p_vout->p_sys;
535     float f_width, f_height, f_x, f_y;
536
537     if( p_sys->p_vout->pf_lock &&
538         p_sys->p_vout->pf_lock( p_sys->p_vout ) )
539     {
540         msg_Warn( p_vout, "could not lock OpenGL provider" );
541         return;
542     }
543
544     /* glTexCoord works differently with GL_TEXTURE_2D and
545        GL_TEXTURE_RECTANGLE_EXT */
546 #ifdef __APPLE__
547     f_x = (float)p_vout->fmt_out.i_x_offset;
548     f_y = (float)p_vout->fmt_out.i_y_offset;
549     f_width = (float)p_vout->fmt_out.i_x_offset +
550               (float)p_vout->fmt_out.i_visible_width;
551     f_height = (float)p_vout->fmt_out.i_y_offset +
552                (float)p_vout->fmt_out.i_visible_height;
553 #else
554     f_x = (float)p_vout->fmt_out.i_x_offset / p_sys->i_tex_width;
555     f_y = (float)p_vout->fmt_out.i_y_offset / p_sys->i_tex_height;
556     f_width = ( (float)p_vout->fmt_out.i_x_offset +
557                 p_vout->fmt_out.i_visible_width ) / p_sys->i_tex_width;
558     f_height = ( (float)p_vout->fmt_out.i_y_offset +
559                  p_vout->fmt_out.i_visible_height ) / p_sys->i_tex_height;
560 #endif
561
562     /* Why drawing here and not in Render()? Because this way, the
563        OpenGL providers can call pf_display to force redraw. Currently,
564        the OS X provider uses it to get a smooth window resizing */
565
566     glClear( GL_COLOR_BUFFER_BIT );
567
568     glEnable( VLCGL_TARGET );
569     glBegin( GL_POLYGON );
570     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
571     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
572     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
573     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
574     glEnd();
575
576     glDisable( VLCGL_TARGET );
577
578     p_sys->p_vout->pf_swap( p_sys->p_vout );
579
580     if( p_sys->p_vout->pf_unlock )
581     {
582         p_sys->p_vout->pf_unlock( p_sys->p_vout );
583     }
584 }
585
586 int GetAlignedSize( int i_size )
587 {
588     /* Return the nearest power of 2 */
589     int i_result = 1;
590     while( i_result < i_size )
591     {
592         i_result *= 2;
593     }
594     return i_result;
595 }
596
597 /*****************************************************************************
598  * Control: control facility for the vout
599  *****************************************************************************/
600 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
601 {
602     vout_sys_t *p_sys = p_vout->p_sys;
603
604     switch( i_query )
605     {
606     case VOUT_SNAPSHOT:
607         return vout_vaControlDefault( p_vout, i_query, args );
608
609     default:
610         if( p_sys->p_vout->pf_control )
611             return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
612         else
613             return vout_vaControlDefault( p_vout, i_query, args );
614     }
615 }
616
617 static int InitTextures( vout_thread_t *p_vout )
618 {
619     vout_sys_t *p_sys = p_vout->p_sys;
620     int i_index;
621
622     glDeleteTextures( 2, p_sys->p_textures );
623     glGenTextures( 2, p_sys->p_textures );
624
625     for( i_index = 0; i_index < 2; i_index++ )
626     {
627         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
628
629         /* Set the texture parameters */
630         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
631
632         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
633         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
634
635         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
636         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
637
638         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
639
640 #ifdef __APPLE__
641         /* Tell the driver not to make a copy of the texture but to use
642            our buffer */
643         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
644         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
645
646 #if 0
647         /* Use VRAM texturing */
648         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
649                          GL_STORAGE_CACHED_APPLE );
650 #else
651         /* Use AGP texturing */
652         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
653                          GL_STORAGE_SHARED_APPLE );
654 #endif
655 #endif
656
657         /* Call glTexImage2D only once, and use glTexSubImage2D later */
658         glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
659                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
660                       p_sys->pp_buffer[i_index] );
661     }
662
663     return 0;
664 }
665
666 /*****************************************************************************
667  * SendEvents: forward mouse and keyboard events to the parent p_vout
668  *****************************************************************************/
669 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
670                        vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
671 {
672     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
673     return var_Set( (vlc_object_t *)_p_vout, psz_var, newval );
674 }