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STR#3012 Fix: cairo_make_current(void*, int, int) would not release previously allocated cc in certain conditions. 

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10026 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Fabien Costantini 2013-12-11 06:16:57 +00:00
parent 0e8f2f786b
commit 32aba335c6
1 changed files with 14 additions and 4 deletions
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18
cairo/Fl_Cairo.cxx
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@ -85,6 +85,7 @@ cairo_t * Fl::cairo_make_current(Fl_Window* wi) {
Creates transparently a cairo_surface_t object.
gc is an HDC context in WIN32, a CGContext* in Quartz, a display on X11
*/
static cairo_surface_t * cairo_create_surface(void * gc, int W, int H) {
# if defined(USE_X11)
return cairo_xlib_surface_create(fl_display, fl_window, fl_visual->visual, W, H);
@ -133,13 +134,15 @@ cairo_t * Fl::cairo_make_current(void *gc) {
cairo_state_.gc(0); // keep track for next time
return 0;
}
if (gc==Fl::cairo_state_.gc() && fl_window== (Window) Fl::cairo_state_.window())
if (gc==Fl::cairo_state_.gc() &&
fl_window== (Window) Fl::cairo_state_.window() &&
cairo_state_.cc()==0)
return Fl::cairo_cc();
cairo_state_.gc(fl_gc); // keep track for next time
cairo_surface_t * s = cairo_create_surface(gc, W, H);
cairo_t * c = cairo_create(s);
cairo_surface_destroy(s);
Fl::cairo_cc(c);
cairo_state_.cc(c);
return c;
}
@ -148,10 +151,17 @@ cairo_t * Fl::cairo_make_current(void *gc) {
\note Only available when configure has the --enable-cairo option
*/
cairo_t * Fl::cairo_make_current(void *gc, int W, int H) {
cairo_surface_t * s = cairo_create_surface(gc, W, H);
if (gc==Fl::cairo_state_.gc() &&
fl_window== (Window) Fl::cairo_state_.window() &&
cairo_state_.cc()!=0) // no need to create a cc, just return that one
return cairo_state_.cc();
// we need to (re-)create a fresh cc ...
cairo_state_.gc(gc); // keep track for next time
cairo_surface_t * s = cairo_create_surface(gc, W, H);
cairo_t * c = cairo_create(s);
cairo_state_.cc(c); // and purge any previously owned context
cairo_surface_destroy(s);
Fl::cairo_cc(c);
return c;
}
#else