PG_Rect PG_Rect::IntersectRect(const PG_Rect& p, const PG_Rect& c) {
static int px0,py0,px1,py1;
static int cx0,cy0,cx1,cy1;
static int rx0,ry0,rx1,ry1;
// fill in default (NULL) result rectangle
PG_Rect result;
// get coordinates of the rectangles
px0 = p.my_xpos;
py0 = p.my_ypos;
px1 = p.my_xpos + p.my_width - 1;
py1 = p.my_ypos + p.my_height - 1;
cx0 = c.my_xpos;
cy0 = c.my_ypos;
cx1 = c.my_xpos + c.my_width - 1;
cy1 = c.my_ypos + c.my_height - 1;
// check if the rectangles intersect
if((cx1 < px0) || (cx0 > px1) || (cy1 < py0) || (cy0 > py1))
return result;
// intersect x
if(cx0 <= px0)
rx0 = px0;
else
rx0 = cx0;
if(cx1 >= px1)
rx1 = px1;
else
rx1 = cx1;
// intersect y
if(cy0 <= py0)
ry0 = py0;
else
ry0 = cy0;
if(cy1 >= py1)
ry1 = py1;
else
ry1 = cy1;
// fill in result rect
result.SetRect(
rx0,
ry0,
(rx1-rx0)+1,
(ry1-ry0)+1);
return result;
}
void PG_Layout::GetParamRect(const char **Source, const char *What, PG_Rect& Rect, PG_Widget* parent) {
char *c = PG_Layout::GetParamStr(Source,What);
if(c == NULL) {
return;
}
if(strlen(c) == 0) {
return;
}
SDL_Surface *screen = PG_Application::GetScreen();
char* parm;
char *d;
char tmp[16];
int i=0;
int mx;
int r[4];
r[0] = r[1] = r[2] = r[3] = 0;
parm = strdup(c);
for(d = strtok(parm,","); d != NULL; d = strtok(NULL,",")) {
if(parent == NULL) {
mx = ((i%2)==0) ? screen->w : screen->h;
} else {
mx = ((i%2)==0) ? parent->w : parent->h;
}
if( sscanf(d, "%d%[%]", & r[i], tmp) == 2 )
r[i] = (int) ((float)r[i]*mx/100);
if(r[i]<0)
r[i] = mx+r[i];
i++;
}
Rect.SetRect(r[0], r[1], r[2], r[3]);
free(parm);
}
