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/******************************************************************************
* recordMyDesktop *
*******************************************************************************
* *
* Copyright (C) 2006,2007,2008 John Varouhakis *
* *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
* *
* *
* For further information contact me at johnvarouhakis@gmail.com *
******************************************************************************/
#include "recordmydesktop.h"
#include "setbrwindow.h"
/**
*Align the recording window to a divisible by 2 pixel start and
*and a size divisible by 16.
*
* \param start x or y of the recording window
*
* \param size width or height of the recording window
*
* \param limit width or height of the Display
*
* \note This is called separately for width and height.
*/
static void SizePack2_8_16(int *start, int *size, int limit) {
int octoffset,hexoffset;
//align in two
//an odd x can always go down and still be in recording area.
//Resolutions come in even numbers
//so if x is an odd numer, width max is an odd number, too
//thus since x will go down one then width can go up one too and still
//be inbounds
(*size)+=((*size)%2)|((*start)%2);
//but if x goes down 1 and width is already even,it becomes odd so:
(*size)+=((*size)%2);
(*start)-=(*start)%2;
//32 bit pack align
//we already have disible by two width,so
//it's 2, 4 or 6
octoffset=((*size)%8);
if(octoffset==2){
(*size)-=2;
}
else if(octoffset==6){
if((*size)+(*start)+2<=limit)
(*size)+=2;
else if((*start)>=2){
(*start)-=2;
(*size)+=2;
}
else{
(*start)+=2;
(*size)-=4;
}
}
else if(octoffset==4){
if(((*size)+(*start)+2<=limit)&&((*start)>=2)){
(*start)-=2;
(*size)+=4;
}
else if((*size)+(*start)+4<=limit){
(*size)+=4;
}
else if((*start)>=4){
(*start)-=4;
(*size)+=4;
}
else{
(*start)+=2;
(*size)-=4;
}
}
//16 divisble width(needed for shared memory only,
//but applied anyway since theora wants it, too)
//we already have divisibility by 8 so module
//by 16 is euther 8 or 0
hexoffset=((*size)%16);
if(hexoffset){
if(((*size)+(*start)+4<=limit)&&((*start)>=4)){
(*start)-=4;
(*size)+=8;
}
else if((*size)+(*start)+8<=limit){
(*size)+=8;
}
else if((*start)>=8){
(*start)-=8;
(*size)+=8;
}
else{
(*start)+=4;
(*size)-=8;
}
}
}
int SetBRWindow(Display *dpy,
BRWindow *brwin,
DisplaySpecs *specs,
ProgArgs *args){
//before we start recording we have to make sure the ranges are valid
if(args->windowid==0){//root window
//first set it up
brwin->windowid=specs->root;
brwin->geom.x=brwin->geom.y=0;
brwin->geom.width=specs->width;
brwin->geom.height=specs->height;
brwin->rgeom.x=args->x;
brwin->rgeom.y=args->y;
brwin->rgeom.width=((args->width)?
args->width:specs->width-brwin->rgeom.x);
brwin->rgeom.height=((args->height)?
args->height:specs->height-brwin->rgeom.y);
//and then check validity
if((brwin->rgeom.x+brwin->rgeom.width>specs->width)||
(brwin->rgeom.y+brwin->rgeom.height>specs->height)){
fprintf(stderr,"Window size specification out of bounds!"
"(current resolution:%dx%d)\n",
specs->width,specs->height);
return 1;
}
}
else{
Window wchid;
int transl_x,transl_y;
XWindowAttributes attribs;
XGetWindowAttributes(dpy,args->windowid,&attribs);
if((attribs.map_state==IsUnviewable)||(attribs.map_state==IsUnmapped)){
fprintf(stderr,"Window must be mapped and visible!\n");
return 1;
}
XTranslateCoordinates(dpy,
specs->root,
args->windowid,
attribs.x,
attribs.y,
&transl_x,
&transl_y,
&wchid);
brwin->geom.x=attribs.x-transl_x;
brwin->geom.y=attribs.y-transl_y;
brwin->geom.width=attribs.width;
brwin->geom.height=attribs.height;
if((brwin->geom.x+brwin->geom.width>specs->width)||
(brwin->geom.y+brwin->geom.height>specs->height)){
fprintf(stderr,"Window must be on visible screen area!\n");
return 1;
}
brwin->rgeom.x=brwin->geom.x+args->x;
brwin->rgeom.y=brwin->geom.y+args->y;
brwin->rgeom.width=((args->width)?
args->width:brwin->geom.width-args->x);
brwin->rgeom.height=((args->height)?
args->height:brwin->geom.height-args->y);
if((args->x+brwin->rgeom.width>brwin->geom.width)||
(args->y+brwin->rgeom.height>brwin->geom.height)){
fprintf(stderr,"Specified Area is larger than window!\n");
return 1;
}
}
fprintf(stderr, "Initial recording window is set to:\n"
"X:%d Y:%d Width:%d Height:%d\n",
brwin->rgeom.x,brwin->rgeom.y,
brwin->rgeom.width,brwin->rgeom.height);
SizePack2_8_16(&brwin->rgeom.x,&brwin->rgeom.width,specs->width);
SizePack2_8_16(&brwin->rgeom.y,&brwin->rgeom.height,specs->height);
fprintf(stderr, "Adjusted recording window is set to:\n"
"X:%d Y:%d Width:%d Height:%d\n",
brwin->rgeom.x,brwin->rgeom.y,
brwin->rgeom.width,brwin->rgeom.height);
brwin->nbytes=(((brwin->rgeom.width+15)>>4)<<4)*
(((brwin->rgeom.height+15)>>4)<<4)*
((specs->depth==16)?2:4);
return 0;
}
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