git.sesse.net Git - vlc/blob - modules/access/screen/mac.c

   1 /*****************************************************************************
   2  * mac.c: Screen capture module for the Mac.
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Derk-Jan Hartman <hartman at videolan dot org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 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 General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>
  28
  29 #include <vlc/vlc.h>
  30
  31 #include <Carbon/Carbon.h>
  32 #include <ApplicationServices/ApplicationServices.h>
  33
  34 typedef int CGSConnectionRef;
  35 extern CGError CGSNewConnection(void* unknown, CGSConnectionRef* newConnection);
  36 extern CGError CGSReleaseConnection(CGSConnectionRef connection);
  37
  38 #include "screen.h"
  39
  40 struct screen_data_t
  41 {
  42     RGBColor          oldForeColor, oldBackColor;
  43     PenState          oldState;
  44     CGDirectDisplayID displayID;
  45     CGSConnectionRef  gConnection;
  46     GDHandle          gMainDevice;
  47     char              gDeviceState;
  48     PixMapHandle      gDevicePix;
  49     GWorldPtr         LocalBufferGW;
  50     PixMapHandle      LocalBufferPix;
  51 };
  52
  53 int screen_InitCapture( demux_t *p_demux )
  54 {
  55     demux_sys_t   *p_sys = p_demux->p_sys;
  56     screen_data_t *p_data;
  57     int            i_chroma, i_bbp, i_offset;
  58
  59     i_chroma = i_bbp = i_offset = 0;
  60
  61     p_sys->p_data = p_data =
  62         (screen_data_t *)malloc( sizeof( screen_data_t ) );
  63
  64     p_data->gConnection = nil;
  65     p_data->gMainDevice = NULL;
  66     p_data->gDevicePix = NULL;
  67     p_data->gDeviceState = nil;
  68     p_data->LocalBufferGW = NULL;
  69     p_data->LocalBufferPix = NULL;
  70
  71     p_data->displayID = CGMainDisplayID();
  72     (void) GetMainDevice();
  73
  74     if( CGDisplaySamplesPerPixel(p_data->displayID) != 3 )
  75     {
  76         msg_Err( p_demux, "screenformat not supported" );
  77     }
  78
  79     switch( CGDisplaySamplesPerPixel(p_data->displayID) * CGDisplayBitsPerSample(p_data->displayID) )
  80     {
  81     /* TODO figure out 256 colors (who uses it anyways) */
  82     case 15: /* TODO this is not RV16, but BGR16 */
  83         i_chroma = VLC_FOURCC('R','V','1','6');
  84         i_bbp = 16;
  85         i_offset = 8;
  86         break;
  87     case 24:
  88     case 32:
  89         i_chroma = VLC_FOURCC('R','V','3','2');
  90         i_bbp = 32;
  91         i_offset = 4;
  92         break;
  93     default:
  94         msg_Err( p_demux, "unknown screen depth: %d", (int)(CGDisplaySamplesPerPixel(p_data->displayID) * CGDisplayBitsPerSample(p_data->displayID)) );
  95         return VLC_EGENERIC;
  96     }
  97
  98     GetBackColor(&p_data->oldBackColor);
  99     GetPenState(&p_data->oldState);
 100     ForeColor(blackColor);
 101     BackColor(whiteColor);
 102
 103     p_data->gMainDevice = GetMainDevice();
 104     p_data->gDeviceState = HGetState((Handle)p_data->gMainDevice);
 105     HLock((Handle)p_data->gMainDevice);
 106     p_data->gDevicePix = (**p_data->gMainDevice).gdPMap;
 107
 108     NewGWorld(&p_data->LocalBufferGW, (**p_data->gDevicePix).pixelSize, &(**p_data->gDevicePix).bounds, (**p_data->gDevicePix).pmTable, NULL, 0);
 109     p_data->LocalBufferPix = GetGWorldPixMap(p_data->LocalBufferGW);
 110     LockPixels(p_data->LocalBufferPix);
 111
 112     es_format_Init( &p_sys->fmt, VIDEO_ES, i_chroma );
 113     p_sys->fmt.video.i_width  = CGDisplayPixelsWide(p_data->displayID) + i_offset;
 114     p_sys->fmt.video.i_visible_width  = CGDisplayPixelsWide(p_data->displayID);
 115     p_sys->fmt.video.i_height = CGDisplayPixelsHigh(p_data->displayID);
 116     p_sys->fmt.video.i_bits_per_pixel = i_bbp;
 117
 118     GetForeColor(&p_data->oldForeColor);
 119
 120     HSetState( (Handle)p_data->gMainDevice, p_data->gDeviceState );
 121     SetPenState( &p_data->oldState);
 122     RGBForeColor( &p_data->oldForeColor );
 123     RGBBackColor( &p_data->oldBackColor );
 124
 125     return VLC_SUCCESS;
 126 }
 127
 128 int screen_CloseCapture( demux_t *p_demux )
 129 {
 130     screen_data_t *p_data = (screen_data_t *)p_demux->p_sys->p_data;
 131
 132     if(p_data->LocalBufferPix) UnlockPixels(p_data->LocalBufferPix); p_data->LocalBufferPix = NULL;
 133     if(p_data->LocalBufferGW) DisposeGWorld(p_data->LocalBufferGW); p_data->LocalBufferGW = NULL;
 134
 135     return VLC_SUCCESS;
 136 }
 137
 138 block_t *screen_Capture( demux_t *p_demux )
 139 {
 140     demux_sys_t *p_sys = p_demux->p_sys;
 141     screen_data_t *p_data = (screen_data_t *)p_sys->p_data;
 142     block_t *p_block;
 143     int i_size;
 144
 145     i_size = p_sys->fmt.video.i_height * p_sys->fmt.video.i_width * 32 / 8;
 146
 147     if( !( p_block = block_New( p_demux, i_size ) ) )
 148     {
 149         msg_Warn( p_demux, "cannot get block" );
 150         return 0;
 151     }
 152
 153     GetForeColor(&p_data->oldForeColor);
 154     GetBackColor(&p_data->oldBackColor);
 155     GetPenState(&p_data->oldState);
 156     ForeColor(blackColor);
 157     BackColor(whiteColor);
 158
 159     assert(CGSNewConnection(NULL, &p_data->gConnection) == kCGErrorSuccess);
 160     p_data->gMainDevice = GetMainDevice();
 161     p_data->gDeviceState = HGetState((Handle)p_data->gMainDevice);
 162     HLock((Handle)p_data->gMainDevice);
 163     p_data->gDevicePix = (**p_data->gMainDevice).gdPMap;
 164
 165     CopyBits(( BitMap*)*p_data->gDevicePix, (BitMap*)*p_data->LocalBufferPix,
 166              &(**p_data->gDevicePix).bounds, &(**p_data->gDevicePix).bounds,
 167              srcCopy, NULL );
 168
 169     HSetState( (Handle)p_data->gMainDevice, p_data->gDeviceState );
 170     SetPenState( &p_data->oldState );
 171     RGBForeColor( &p_data->oldForeColor );
 172     RGBBackColor( &p_data->oldBackColor );
 173
 174     assert(CGSReleaseConnection(p_data->gConnection) == kCGErrorSuccess);
 175     memcpy( p_block->p_buffer, (**p_data->LocalBufferPix).baseAddr, i_size );
 176
 177     return p_block;
 178 }
 179