Add static void Fl_Surface_Device::push_current(Fl_Surface_Device *new_current) and pop_current() to set/unset the current drawing surface.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12140 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

2 files changed, 2 insertions, 6 deletions

diff --git a/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx b/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
index ca3d74734..00d96ea42 100644
--- a/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
+++ b/src/drivers/Quartz/Fl_Quartz_Graphics_Driver_image.cxx
@@ -251,12 +251,11 @@ static void pmProviderRelease (void *ctxt, const void *data, size_t size) {
 }
 
 fl_uintptr_t Fl_Quartz_Graphics_Driver::cache(Fl_Pixmap *img, int w, int h, const char *const*data) {
-  Fl_Surface_Device *old = Fl_Surface_Device::surface();
   Fl_Image_Surface *surf = new Fl_Image_Surface(w, h);
-  surf->set_current();
+  Fl_Surface_Device::push_current(surf);
   fl_draw_pixmap(data, 0, 0, FL_BLACK);
   CGContextRef src = surf->get_offscreen_before_delete();
-  old->set_current();
+  Fl_Surface_Device::pop_current();
   delete surf;
   void *cgdata = CGBitmapContextGetData(src);
   int sw = CGBitmapContextGetWidth(src);
diff --git a/src/drivers/Quartz/Fl_Quartz_Image_Surface_Driver.cxx b/src/drivers/Quartz/Fl_Quartz_Image_Surface_Driver.cxx
index 1a2e3de5e..cb22904aa 100644
--- a/src/drivers/Quartz/Fl_Quartz_Image_Surface_Driver.cxx
+++ b/src/drivers/Quartz/Fl_Quartz_Image_Surface_Driver.cxx
@@ -29,7 +29,6 @@ class Fl_Quartz_Image_Surface_Driver : public Fl_Image_Surface_Driver {
   friend class Fl_Image_Surface;
   virtual void end_current_();
 public:
-  Fl_Surface_Device *previous;
   Window pre_window;
   Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res);
   ~Fl_Quartz_Image_Surface_Driver();
@@ -47,7 +46,6 @@ Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, i
 
 
 Fl_Quartz_Image_Surface_Driver::Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res) : Fl_Image_Surface_Driver(w, h, high_res, 0) {
-  previous = 0;
   int W = high_res ? 2*w : w;
   int H = high_res ? 2*h : h;
   CGColorSpaceRef lut = CGColorSpaceCreateDeviceRGB();
@@ -77,7 +75,6 @@ Fl_Quartz_Image_Surface_Driver::~Fl_Quartz_Image_Surface_Driver() {
 
 void Fl_Quartz_Image_Surface_Driver::set_current() {
   pre_window = fl_window;
-  if (!previous) previous = Fl_Surface_Device::surface();
   driver()->gc(offscreen);
   fl_window = 0;
   Fl_Surface_Device::set_current();