From 39b2976f887e1dda102ad48ca045a09b89c70c27 Mon Sep 17 00:00:00 2001
From: Manolo Gouy <Manolo>
Date: Sat, 6 May 2017 07:36:40 +0000
Subject: De-duplicate code to load pointer to the TransparentBlt() system
 function at run-time.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12234 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/drivers/GDI/Fl_GDI_Graphics_Driver.H         |  3 +++
 src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx | 25 ++++++++++--------------
 2 files changed, 13 insertions(+), 15 deletions(-)

(limited to 'src')

diff --git a/src/drivers/GDI/Fl_GDI_Graphics_Driver.H b/src/drivers/GDI/Fl_GDI_Graphics_Driver.H
index 73ed71735..71a99b9b0 100644
--- a/src/drivers/GDI/Fl_GDI_Graphics_Driver.H
+++ b/src/drivers/GDI/Fl_GDI_Graphics_Driver.H
@@ -157,6 +157,9 @@ protected:
  This class is implemented only on the MSWindows platform. It 's extremely similar to Fl_GDI_Graphics_Driver.
  */
 class FL_EXPORT Fl_GDI_Printer_Graphics_Driver : public Fl_GDI_Graphics_Driver {
+private:
+  typedef BOOL (WINAPI* transparent_f_type) (HDC,int,int,int,int,HDC,int,int,int,int,UINT);
+  transparent_f_type TransparentBlt();
 public:
   virtual int has_feature(driver_feature mask) { return mask & (NATIVE | PRINTER); }
   void draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy);
diff --git a/src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx b/src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
index 8d3ba61e1..7006bc429 100644
--- a/src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
+++ b/src/drivers/GDI/Fl_GDI_Graphics_Driver_image.cxx
@@ -415,16 +415,17 @@ void Fl_GDI_Graphics_Driver::draw(Fl_Bitmap *bm, int XP, int YP, int WP, int HP,
   DeleteDC(tempdc);
 }
 
-// TODO: move this into a file with the printer implementations
+Fl_GDI_Printer_Graphics_Driver::transparent_f_type Fl_GDI_Printer_Graphics_Driver::TransparentBlt() {
+  HMODULE hMod;
+  static transparent_f_type fpter = ( (hMod = LoadLibrary("MSIMG32.DLL")) ?
+                                             (transparent_f_type)GetProcAddress(hMod, "TransparentBlt") : NULL
+                                             );
+  return fpter;
+}
+
 void Fl_GDI_Printer_Graphics_Driver::draw(Fl_Bitmap *bm, int XP, int YP, int WP, int HP, int cx, int cy) {
   int X, Y, W, H;
-  typedef BOOL (WINAPI* fl_transp_func)  (HDC,int,int,int,int,HDC,int,int,int,int,UINT);
-  static fl_transp_func fl_TransparentBlt = NULL;
-  static HMODULE hMod = NULL;
-  if (!hMod) {
-    hMod = LoadLibrary("MSIMG32.DLL");
-    if (hMod) fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod, "TransparentBlt");
-  }
+  transparent_f_type fl_TransparentBlt = TransparentBlt();
   if (!fl_TransparentBlt) {
     Fl_GDI_Graphics_Driver::draw(bm,  XP,  YP,  WP,  HP,  cx,  cy);
     return;
@@ -611,13 +612,7 @@ void Fl_GDI_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP
 void Fl_GDI_Printer_Graphics_Driver::draw(Fl_Pixmap *pxm, int XP, int YP, int WP, int HP, int cx, int cy) {
   int X, Y, W, H;
   if (Fl_Graphics_Driver::prepare(pxm, XP, YP, WP, HP, cx, cy, X, Y, W, H)) return;
-  typedef BOOL (WINAPI* fl_transp_func)  (HDC,int,int,int,int,HDC,int,int,int,int,UINT);
-  static HMODULE hMod = NULL;
-  static fl_transp_func fl_TransparentBlt = NULL;
-  if (!hMod) {
-    hMod = LoadLibrary("MSIMG32.DLL");
-    if(hMod) fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod, "TransparentBlt");
-  }
+  transparent_f_type fl_TransparentBlt = TransparentBlt();
   if (fl_TransparentBlt) {
     HDC new_gc = CreateCompatibleDC(gc_);
     int save = SaveDC(new_gc);
-- 
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