commit 4de491d02e5c45d9a43cb7f93b729aaae1bbe8b6
Author:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
AuthorDate: Fri Nov 25 15:53:04 2022 +0100
Commit:     ManoloFLTK <41016272+ManoloFLTK@users.noreply.github.com>
CommitDate: Fri Nov 25 15:53:28 2022 +0100

    Make Fl_XXX_Graphics_Driver::create_bitmask() a static member function

 src/drivers/GDI/Fl_GDI_Graphics_Driver.H         |  2 +-
 src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx | 12 +++++-------
 src/drivers/Quartz/Fl_Quartz_Graphics_Driver.H   |  2 +-
 src/drivers/Xlib/Fl_Xlib_Graphics_Driver.H       |  2 +-
 4 files changed, 8 insertions(+), 10 deletions(-)

diff --git src/drivers/GDI/Fl_GDI_Graphics_Driver.H src/drivers/GDI/Fl_GDI_Graphics_Driver.H
index 521584f..39af1e6 100644
--- src/drivers/GDI/Fl_GDI_Graphics_Driver.H
+++ src/drivers/GDI/Fl_GDI_Graphics_Driver.H
@@ -69,7 +69,7 @@ public:
   virtual void *gc() {return gc_;}
 
   // --- bitmap stuff
-  HBITMAP create_bitmask(int w, int h, const uchar *array); // NOT virtual
+  static HBITMAP create_bitmask(int w, int h, const uchar *array); // NOT virtual
   virtual void delete_bitmask(fl_uintptr_t bm);
   HBITMAP create_alphamask(int w, int h, int d, int ld, const uchar *array);
   virtual void draw_unscaled(const char* str, int n, int x, int y);
diff --git src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
index d3e23be..62598f2 100644
--- src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
+++ src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
@@ -337,7 +337,7 @@ void Fl_GDI_Graphics_Driver::colored_rectf(int x, int y, int w, int h, uchar r,
 // Create an N-bit bitmap for masking...
 HBITMAP Fl_GDI_Graphics_Driver::create_bitmask(int w, int h, const uchar *data) {
   // this won't work when the user changes display mode during run or
-  // has two screens with differnet depths
+  // has two screens with different depths
   HBITMAP bm;
   static uchar hiNibble[16] =
   { 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
@@ -345,8 +345,9 @@ HBITMAP Fl_GDI_Graphics_Driver::create_bitmask(int w, int h, const uchar *data)
   static uchar loNibble[16] =
   { 0x00, 0x08, 0x04, 0x0c, 0x02, 0x0a, 0x06, 0x0e,
     0x01, 0x09, 0x05, 0x0d, 0x03, 0x0b, 0x07, 0x0f };
-  int np  = GetDeviceCaps(gc_, PLANES); //: was always one on sample machines
-  int bpp = GetDeviceCaps(gc_, BITSPIXEL);//: 1,4,8,16,24,32 and more odd stuff?
+  HDC current_gc = (HDC)Fl_Surface_Device::surface()->driver()->gc();
+  int np  = GetDeviceCaps(current_gc, PLANES); //: was always one on sample machines
+  int bpp = GetDeviceCaps(current_gc, BITSPIXEL);//: 1,4,8,16,24,32 and more odd stuff?
   int Bpr = (bpp*w+7)/8;                        //: bytes per row
   int pad = Bpr&1, w1 = (w+7)/8, shr = ((w-1)&7)+1;
   if (bpp==4) shr = (shr+1)/2;
@@ -803,11 +804,8 @@ void Fl_GDI_Graphics_Driver::cache(Fl_Pixmap *img) {
   fl_draw_pixmap(img->data(), 0, 0, FL_BLACK);
   uchar *bitmap = *pbitmap;
   if (bitmap) {
-    // Note: activating the surface device changes graphics drivers.
-    // Don't use 'this', but the new driver instead.
     *Fl_Graphics_Driver::mask(img) =
-      (fl_uintptr_t)((Fl_GDI_Graphics_Driver *)fl_graphics_driver)->
-      create_bitmask(img->data_w(), img->data_h(), bitmap);
+      (fl_uintptr_t)create_bitmask(img->data_w(), img->data_h(), bitmap);
     delete[] bitmap;
   }
   *pbitmap = 0;
diff --git src/drivers/Quartz/Fl_Quartz_Graphics_Driver.H src/drivers/Quartz/Fl_Quartz_Graphics_Driver.H
index 945ba4a..f5c9bd3 100644
--- src/drivers/Quartz/Fl_Quartz_Graphics_Driver.H
+++ src/drivers/Quartz/Fl_Quartz_Graphics_Driver.H
@@ -65,7 +65,7 @@ public:
   char can_do_alpha_blending();
 
   // --- bitmap stuff
-  CGImageRef create_bitmask(int w, int h, const uchar *array); // NOT virtual
+  static CGImageRef create_bitmask(int w, int h, const uchar *array); // NOT virtual
   virtual void delete_bitmask(fl_uintptr_t bm);
   void draw_pixmap(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy);
   void draw_bitmap(Fl_Bitmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy);
diff --git src/drivers/Xlib/Fl_Xlib_Graphics_Driver.H src/drivers/Xlib/Fl_Xlib_Graphics_Driver.H
index cf2fcac..899d398 100644
--- src/drivers/Xlib/Fl_Xlib_Graphics_Driver.H
+++ src/drivers/Xlib/Fl_Xlib_Graphics_Driver.H
@@ -119,7 +119,7 @@ public:
   static int fl_overlay;
 
   // --- bitmap stuff
-  unsigned long create_bitmask(int w, int h, const uchar *array); // NOT virtual
+  static unsigned long create_bitmask(int w, int h, const uchar *array); // NOT virtual
   virtual void delete_bitmask(fl_uintptr_t bm);
   virtual void draw_unscaled(const char* str, int n, int x, int y);
   virtual void draw_unscaled(int angle, const char *str, int n, int x, int y);