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
  28 #include <vlc/vlc.h>
  29
  30 #include <Carbon/Carbon.h>
  31 #include <ApplicationServices/ApplicationServices.h>
  32
  33 typedef int CGSConnectionRef;
  34 extern CGError CGSNewConnection(void* unknown, CGSConnectionRef* newConnection);
  35 extern CGError CGSReleaseConnection(CGSConnectionRef connection);
  36
  37 #include "screen.h"
  38
  39 struct screen_data_t
  40 {
  41     RGBColor          oldForeColor, oldBackColor;
  42     PenState          oldState;
  43     CGDirectDisplayID displayID;
  44     CGSConnectionRef  gConnection;
  45     GDHandle          gMainDevice;
  46     char              gDeviceState;
  47     PixMapHandle      gDevicePix;
  48     GWorldPtr         LocalBufferGW;
  49     PixMapHandle      LocalBufferPix;
  50 };
  51
  52 int screen_InitCapture( demux_t *p_demux )
  53 {
  54     demux_sys_t   *p_sys = p_demux->p_sys;
  55     screen_data_t *p_data;
  56     int            i_chroma, i_bbp, i_offset;
  57
  58     i_chroma = i_bbp = i_offset = 0;
  59
  60     p_sys->p_data = p_data =
  61         (screen_data_t *)malloc( sizeof( screen_data_t ) );
  62
  63     p_data->gConnection = nil;
  64     p_data->gMainDevice = NULL;
  65     p_data->gDevicePix = NULL;
  66     p_data->gDeviceState = nil;
  67     p_data->LocalBufferGW = NULL;
  68     p_data->LocalBufferPix = NULL;
  69
  70     p_data->displayID = CGMainDisplayID();
  71     (void) GetMainDevice();
  72
  73     if( CGDisplaySamplesPerPixel(p_data->displayID) != 3 )
  74     {
  75         msg_Err( p_demux, "screenformat not supported" );
  76     }
  77
  78     switch( CGDisplaySamplesPerPixel(p_data->displayID) * CGDisplayBitsPerSample(p_data->displayID) )
  79     {
  80     /* TODO figure out 256 colors (who uses it anyways) */
  81     case 15: /* TODO this is not RV16, but BGR16 */
  82         i_chroma = VLC_FOURCC('R','V','1','6');
  83         i_bbp = 16;
  84         i_offset = 8;
  85         break;
  86     case 24:
  87     case 32:
  88         i_chroma = VLC_FOURCC('R','V','3','2');
  89         i_bbp = 32;
  90         i_offset = 4;
  91         break;
  92     default:
  93         msg_Err( p_demux, "unknown screen depth: %d", (int)(CGDisplaySamplesPerPixel(p_data->displayID) * CGDisplayBitsPerSample(p_data->displayID)) );
  94         return VLC_EGENERIC;
  95     }
  96
  97     GetBackColor(&p_data->oldBackColor);
  98     GetPenState(&p_data->oldState);
  99     ForeColor(blackColor);
 100     BackColor(whiteColor);
 101
 102     p_data->gMainDevice = GetMainDevice();
 103     p_data->gDeviceState = HGetState((Handle)p_data->gMainDevice);
 104     HLock((Handle)p_data->gMainDevice);
 105     p_data->gDevicePix = (**p_data->gMainDevice).gdPMap;
 106
 107     NewGWorld(&p_data->LocalBufferGW, (**p_data->gDevicePix).pixelSize, &(**p_data->gDevicePix).bounds, (**p_data->gDevicePix).pmTable, NULL, 0);
 108     p_data->LocalBufferPix = GetGWorldPixMap(p_data->LocalBufferGW);
 109     LockPixels(p_data->LocalBufferPix);
 110
 111     es_format_Init( &p_sys->fmt, VIDEO_ES, i_chroma );
 112     p_sys->fmt.video.i_width  = CGDisplayPixelsWide(p_data->displayID) + i_offset;
 113     p_sys->fmt.video.i_visible_width  = CGDisplayPixelsWide(p_data->displayID);
 114     p_sys->fmt.video.i_height = CGDisplayPixelsHigh(p_data->displayID);
 115     p_sys->fmt.video.i_bits_per_pixel = i_bbp;
 116
 117     GetForeColor(&p_data->oldForeColor);
 118
 119     HSetState( (Handle)p_data->gMainDevice, p_data->gDeviceState );
 120     SetPenState( &p_data->oldState);
 121     RGBForeColor( &p_data->oldForeColor );
 122     RGBBackColor( &p_data->oldBackColor );
 123
 124     return VLC_SUCCESS;
 125 }
 126
 127 int screen_CloseCapture( demux_t *p_demux )
 128 {
 129     screen_data_t *p_data = (screen_data_t *)p_demux->p_sys->p_data;
 130
 131     if(p_data->LocalBufferPix) UnlockPixels(p_data->LocalBufferPix); p_data->LocalBufferPix = NULL;
 132     if(p_data->LocalBufferGW) DisposeGWorld(p_data->LocalBufferGW); p_data->LocalBufferGW = NULL;
 133
 134     return VLC_SUCCESS;
 135 }
 136
 137 block_t *screen_Capture( demux_t *p_demux )
 138 {
 139     demux_sys_t *p_sys = p_demux->p_sys;
 140     screen_data_t *p_data = (screen_data_t *)p_sys->p_data;
 141     block_t *p_block;
 142     int i_size;
 143
 144     i_size = p_sys->fmt.video.i_height * p_sys->fmt.video.i_width * 32 / 8;
 145
 146     if( !( p_block = block_New( p_demux, i_size ) ) )
 147     {
 148         msg_Warn( p_demux, "cannot get block" );
 149         return 0;
 150     }
 151
 152     GetForeColor(&p_data->oldForeColor);
 153     GetBackColor(&p_data->oldBackColor);
 154     GetPenState(&p_data->oldState);
 155     ForeColor(blackColor);
 156     BackColor(whiteColor);
 157
 158     assert(CGSNewConnection(NULL, &p_data->gConnection) == kCGErrorSuccess);
 159     p_data->gMainDevice = GetMainDevice();
 160     p_data->gDeviceState = HGetState((Handle)p_data->gMainDevice);
 161     HLock((Handle)p_data->gMainDevice);
 162     p_data->gDevicePix = (**p_data->gMainDevice).gdPMap;
 163
 164     CopyBits(( BitMap*)*p_data->gDevicePix, (BitMap*)*p_data->LocalBufferPix,
 165              &(**p_data->gDevicePix).bounds, &(**p_data->gDevicePix).bounds,
 166              srcCopy, NULL );
 167
 168     HSetState( (Handle)p_data->gMainDevice, p_data->gDeviceState );
 169     SetPenState( &p_data->oldState );
 170     RGBForeColor( &p_data->oldForeColor );
 171     RGBBackColor( &p_data->oldBackColor );
 172
 173     assert(CGSReleaseConnection(p_data->gConnection) == kCGErrorSuccess);
 174     memcpy( p_block->p_buffer, (**p_data->LocalBufferPix).baseAddr, i_size );
 175
 176     return p_block;
 177 }
 178