diff options
Diffstat (limited to 'src/Fl_Image_Surface.cxx')
| -rw-r--r-- | src/Fl_Image_Surface.cxx | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/src/Fl_Image_Surface.cxx b/src/Fl_Image_Surface.cxx index 3548d40a1..56b35bd33 100644 --- a/src/Fl_Image_Surface.cxx +++ b/src/Fl_Image_Surface.cxx @@ -132,7 +132,6 @@ Fl_Offscreen Fl_Image_Surface::get_offscreen_before_delete() { static Fl_Image_Surface **offscreen_api_surface = NULL; static int count_offscreens = 0; -static int current_offscreen; static int find_slot(void) { // return an available slot to memorize an Fl_Image_Surface::Helper object static int max = 0; @@ -175,14 +174,21 @@ void fl_delete_offscreen(Fl_Offscreen ctx) { } } +static int stack_current_offscreen[16]; +static int stack_height = 0; + /** Send all subsequent drawing commands to this offscreen buffer. \param ctx the offscreen buffer. */ void fl_begin_offscreen(Fl_Offscreen ctx) { - for (current_offscreen = 0; current_offscreen < count_offscreens; current_offscreen++) { - if (offscreen_api_surface[current_offscreen] && - offscreen_api_surface[current_offscreen]->offscreen() == ctx) { - offscreen_api_surface[current_offscreen]->set_current(); + for (int i = 0; i < count_offscreens; i++) { + if (offscreen_api_surface[i] && offscreen_api_surface[i]->offscreen() == ctx) { + offscreen_api_surface[i]->set_current(); + if (stack_height < sizeof(stack_current_offscreen)/sizeof(int)) { + stack_current_offscreen[stack_height++] = i; + } else { + fprintf(stderr, "FLTK fl_begin_offscreen Stack overflow error\n"); + } return; } } @@ -191,7 +197,10 @@ void fl_begin_offscreen(Fl_Offscreen ctx) { /** Quit sending drawing commands to the current offscreen buffer. */ void fl_end_offscreen() { - offscreen_api_surface[current_offscreen]->end_current(); + if (stack_height > 0) { + int i = stack_current_offscreen[--stack_height]; + offscreen_api_surface[i]->end_current(); + } } /** @} */ |