Merge of branch-1.3-Fl_Printer, with the following main changes:

 (1) adding Fl_Device class (and more) for device abstraction
 (2) adding Fl_Pinter class (and more) for printing support.

Todo: Code cleanup, update dependencies, remove/replace test print window.
I'm looking into converting the test window popup in a global shortcut
that would pop up the print dialog now...


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@7263 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 53 insertions, 1 deletions

diff --git a/src/Fl_Pixmap.cxx b/src/Fl_Pixmap.cxx
index 42ab0bb0a..ecf45915b 100644
--- a/src/Fl_Pixmap.cxx
+++ b/src/Fl_Pixmap.cxx
@@ -47,6 +47,7 @@
 #include <FL/Fl_Widget.H>
 #include <FL/Fl_Menu_Item.H>
 #include <FL/Fl_Pixmap.H>
+#include <FL/Fl_Printer.H>
 
 #include <stdio.h>
 #include "flstring.h"
@@ -74,6 +75,10 @@ void Fl_Pixmap::measure() {
 }
 
 void Fl_Pixmap::draw(int XP, int YP, int WP, int HP, int cx, int cy) {
+  if(fl_device->type() == Fl_Device::postscript_device) {
+    ((Fl_Virtual_Printer*)fl_device)->draw(this, XP, YP, WP, HP, cx, cy);
+    return;
+    }
   // ignore empty or bad pixmap data:
   if (!data()) {
     draw_empty(XP, YP);
@@ -139,7 +144,54 @@ void Fl_Pixmap::draw(int XP, int YP, int WP, int HP, int cx, int cy) {
     fl_restore_clip();
   }
 #elif defined(WIN32)
-  if (mask) {
+  if (fl_device->type() == Fl_Device::gdi_printer) {
+    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");
+      }
+    if (hMod) {
+#     define UNLIKELY_RGB_COLOR 2,3,4 // a nearly black color unlikely to occur in pixmaps
+#     define WIN_COLOR RGB(2,3,4)
+      Fl_Offscreen tmp_id = fl_create_offscreen(w(), h());
+      fl_begin_offscreen(tmp_id);
+      uchar *bitmap = 0;
+      fl_mask_bitmap = &bitmap;
+      // draw pixmap to offscreen using the unlikely color for background
+      fl_draw_pixmap(data(), 0, 0, fl_rgb_color(UNLIKELY_RGB_COLOR) ); 
+      fl_end_offscreen();
+      HDC new_gc = CreateCompatibleDC(fl_gc);
+      int save = SaveDC(new_gc);
+      SelectObject(new_gc, (void*)tmp_id);
+      // print all of offscreen but its parts using unlikely color
+      fl_TransparentBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, w(), h(), WIN_COLOR );
+      RestoreDC(new_gc,save);
+      // This is an approximate algorithm that fails to print pixmap pixels that would use the unlikely color.
+      // It can be transformed into an exact algorithm by adding the following commented out statements
+      // that print pixmap one more time hiding another color (any color would fit)
+      /*
+#     define UNLIKELY_RGB_COLOR2 4,3,2
+#     define WIN_COLOR2 RGB(4,3,2)
+      {
+	fl_begin_offscreen(tmp_id);
+	fl_draw_pixmap(data(), 0, 0, fl_rgb_color(UNLIKELY_RGB_COLOR2) );
+	fl_end_offscreen();
+      }
+      save = SaveDC(new_gc);
+      SelectObject(new_gc, (void*)tmp_id);
+      fl_TransparentBlt(fl_gc, X, Y, W, H, new_gc, cx, cy, w(), h(), WIN_COLOR2 );
+      RestoreDC(new_gc,save);
+      */
+      DeleteDC(new_gc);
+      fl_delete_offscreen(tmp_id);
+    }
+    else {
+      fl_copy_offscreen(X, Y, W, H, (Fl_Offscreen)id, cx, cy);
+    }
+  }
+  else if (mask) {
     HDC new_gc = CreateCompatibleDC(fl_gc);
     int save = SaveDC(new_gc);
     SelectObject(new_gc, (void*)mask);