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/*****************************************************************************
* mac.c: Screen capture module for the Mac.
*****************************************************************************
* Copyright (C) 2004 - 2013 VLC authors and VideoLAN
* $Id$
*
* Authors: FUJISAWA Tooru <arai_a@mac.com>
* Derk-Jan Hartman <hartman at videolan dot org>
* Pierre d'Herbemont <pdherbemont # videolan org>
* Felix Paul Kühne <fkuehne # videolan org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#import <vlc_common.h>
#import <vlc_block.h>
#import "screen.h"
#import <ApplicationServices/ApplicationServices.h>
#import <QuartzCore/QuartzCore.h>
extern int CGSMainConnectionID();
extern CGImageRef CGSCreateRegisteredCursorImage(int, char*, CGPoint*);
struct screen_data_t
{
block_t *p_block;
int width;
int height;
int screen_top;
int screen_left;
int screen_width;
int screen_height;
float rate;
CGDirectDisplayID display_id;
CGContextRef offscreen_context;
CGRect offscreen_rect;
void *offscreen_bitmap;
size_t offscreen_bitmap_size;
};
int screen_InitCapture(demux_t *p_demux)
{
demux_sys_t *p_sys = p_demux->p_sys;
screen_data_t *p_data;
CGLError returnedError;
p_sys->p_data = p_data = calloc(1, sizeof(screen_data_t));
if (!p_data)
return VLC_ENOMEM;
/* fetch the screen we should capture */
p_data->display_id = kCGDirectMainDisplay;
p_data->rate = var_InheritFloat(p_demux, "screen-fps");
unsigned int displayCount = 0;
returnedError = CGGetOnlineDisplayList(0, NULL, &displayCount);
if (!returnedError) {
CGDirectDisplayID *ids;
ids = vlc_alloc(displayCount, sizeof(CGDirectDisplayID));
returnedError = CGGetOnlineDisplayList(displayCount, ids, &displayCount);
if (!returnedError) {
if (p_sys->i_display_id > 0) {
for (unsigned int i = 0; i < displayCount; i++) {
if (p_sys->i_display_id == ids[i]) {
p_data->display_id = ids[i];
break;
}
}
} else if (p_sys->i_screen_index > 0 && p_sys->i_screen_index <= displayCount)
p_data->display_id = ids[p_sys->i_screen_index - 1];
}
free(ids);
}
/* Get the device context for the whole screen */
CGRect rect = CGDisplayBounds(p_data->display_id);
p_data->screen_left = rect.origin.x;
p_data->screen_top = rect.origin.y;
p_data->screen_width = rect.size.width;
p_data->screen_height = rect.size.height;
p_data->width = p_sys->i_width;
p_data->height = p_sys->i_height;
if (p_data->width <= 0 || p_data->height <= 0) {
p_data->width = p_data->screen_width;
p_data->height = p_data->screen_height;
}
/* setup format */
es_format_Init(&p_sys->fmt, VIDEO_ES, VLC_CODEC_RGB32);
p_sys->fmt.video.i_visible_width =
p_sys->fmt.video.i_width = rect.size.width;
p_sys->fmt.video.i_visible_height =
p_sys->fmt.video.i_height = rect.size.height;
p_sys->fmt.video.i_bits_per_pixel = 32;
p_sys->fmt.video.i_chroma = VLC_CODEC_RGB32;
p_sys->fmt.video.i_rmask = 0x00ff0000;
p_sys->fmt.video.i_gmask = 0x0000ff00;
p_sys->fmt.video.i_bmask = 0x000000ff;
p_sys->fmt.video.i_sar_num =
p_sys->fmt.video.i_sar_den = 1;
p_sys->fmt.video.i_frame_rate = 1000 * p_data->rate;
p_sys->fmt.video.i_frame_rate_base = 1000;
return VLC_SUCCESS;
}
int screen_CloseCapture(demux_t *p_demux)
{
demux_sys_t *p_sys = p_demux->p_sys;
screen_data_t *p_data = p_sys->p_data;
if (p_data->offscreen_context)
CFRelease(p_data->offscreen_context);
if (p_data->offscreen_bitmap)
free(p_data->offscreen_bitmap);
if (p_data->p_block)
block_Release(p_data->p_block);
free(p_data);
return VLC_SUCCESS;
}
block_t *screen_Capture(demux_t *p_demux)
{
demux_sys_t *p_sys = p_demux->p_sys;
screen_data_t *p_data = (screen_data_t *)p_sys->p_data;
block_t *p_block;
CGRect capture_rect;
CGImageRef image;
/* forward cursor location */
CGPoint cursor_pos;
CGEventRef event = CGEventCreate(NULL);
cursor_pos = CGEventGetLocation(event);
CFRelease(event);
cursor_pos.x -= p_data->screen_left;
cursor_pos.y -= p_data->screen_top;
if (p_sys->b_follow_mouse)
FollowMouse(p_sys, cursor_pos.x, cursor_pos.y);
capture_rect.origin.x = p_sys->i_left;
capture_rect.origin.y = p_sys->i_top;
capture_rect.size.width = p_data->width;
capture_rect.size.height = p_data->height;
/* fetch image data */
image = CGDisplayCreateImageForRect(p_data->display_id, capture_rect);
if (!image) {
msg_Warn(p_demux, "no image!");
return NULL;
}
/* create offscreen context */
if (!p_data->offscreen_context) {
CGColorSpaceRef colorspace;
colorspace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
p_data->offscreen_bitmap_size = p_sys->fmt.video.i_width * p_sys->fmt.video.i_height * 4;
p_data->offscreen_bitmap = calloc(1, p_data->offscreen_bitmap_size);
if (p_data->offscreen_bitmap == NULL) {
msg_Warn(p_demux, "can't allocate offscreen bitmap");
CFRelease(image);
return NULL;
}
p_data->offscreen_context = CGBitmapContextCreate(p_data->offscreen_bitmap, p_sys->fmt.video.i_width, p_sys->fmt.video.i_height, 8, p_sys->fmt.video.i_width * 4, colorspace, kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Little);
if (!p_data->offscreen_context) {
msg_Warn(p_demux, "can't create offscreen bitmap context");
CFRelease(image);
return NULL;
}
CGColorSpaceRelease(colorspace);
p_data->offscreen_rect = CGRectMake(0, 0, p_sys->fmt.video.i_width, p_sys->fmt.video.i_height);
}
/* fetch cursor image */
CGImageRef cursor_image;
int cid = CGSMainConnectionID();
CGPoint outHotSpot;
cursor_image = CGSCreateRegisteredCursorImage(cid, (char *)"com.apple.coregraphics.GlobalCurrent", &outHotSpot);
/* draw screen image and cursor image */
CGRect cursor_rect;
cursor_rect.size.width = CGImageGetWidth(cursor_image);
cursor_rect.size.height = CGImageGetHeight(cursor_image);
cursor_rect.origin.x = cursor_pos.x - p_sys->i_left - outHotSpot.x;
cursor_rect.origin.y = p_data->offscreen_rect.size.height
- (cursor_pos.y + cursor_rect.size.height - p_sys->i_top - outHotSpot.y);
CGContextDrawImage(p_data->offscreen_context, p_data->offscreen_rect, image);
CGContextDrawImage(p_data->offscreen_context, cursor_rect, cursor_image);
/* build block */
p_block = block_Alloc(p_data->offscreen_bitmap_size);
if (!p_block) {
msg_Warn(p_demux, "can't get block");
CFRelease(image);
return NULL;
}
memmove(p_block->p_buffer, p_data->offscreen_bitmap, p_data->offscreen_bitmap_size);
CFRelease(image);
return p_block;
}
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