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Fixed some clipping stack bugs (no range checking).

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git-svn-id: file:///fltk/svn/fltk/trunk@17 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Michael R Sweet 1998-10-19 17:23:47 +00:00
parent f3fc32d284
commit 33ee986a7b
1 changed files with 10 additions and 6 deletions
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16
src/fl_rect.cxx
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@ -208,8 +208,10 @@ void fl_point(int x, int y) {
////////////////////////////////////////////////////////////////
static Region rstack[10];
static int rstackptr;
#define STACK_SIZE 10
#define STACK_MAX (STACK_SIZE - 1)
static Region rstack[STACK_SIZE];
static int rstackptr=0;
int fl_clip_state_number=0; // used by gl_begin.C to update GL clip
#ifndef WIN32
@ -267,20 +269,22 @@ void fl_clip(int x, int y, int w, int h) {
r = CreateRectRgn(0,0,0,0);
#endif
}
rstack[++rstackptr] = r;
if (rstackptr < STACK_MAX) rstack[++rstackptr] = r;
fl_restore_clip();
}
// make there be no clip (used by fl_begin_offscreen() only!)
void fl_push_no_clip() {
rstack[++rstackptr] = 0;
if (rstackptr < STACK_MAX) rstack[++rstackptr] = 0;
fl_restore_clip();
}
// pop back to previous clip:
void fl_pop_clip() {
Region oldr = rstack[rstackptr--];
if (oldr) XDestroyRegion(oldr);
if (rstackptr > 0) {
Region oldr = rstack[rstackptr--];
if (oldr) XDestroyRegion(oldr);
}
fl_restore_clip();
}