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, 50 insertions, 6 deletions

diff --git a/src/Fl_Bitmap.cxx b/src/Fl_Bitmap.cxx
index 26019091b..513858e78 100644
--- a/src/Fl_Bitmap.cxx
+++ b/src/Fl_Bitmap.cxx
@@ -37,6 +37,7 @@
 #include <FL/Fl_Widget.H>
 #include <FL/Fl_Menu_Item.H>
 #include <FL/Fl_Bitmap.H>
+#include <FL/Fl_Printer.H>
 #include "flstring.h"
 
 #if defined(__APPLE_QUARTZ__)
@@ -264,6 +265,10 @@ Fl_Bitmask fl_create_alphamask(int w, int h, int d, int ld, const uchar *array)
 }
 
 void Fl_Bitmap::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;
+  }
   if (!array) {
     draw_empty(XP, YP);
     return;
@@ -293,12 +298,51 @@ void Fl_Bitmap::draw(int XP, int YP, int WP, int HP, int cx, int cy) {
 #elif defined(WIN32)
   if (!id) id = fl_create_bitmap(w(), h(), array);
 
-  HDC tempdc = CreateCompatibleDC(fl_gc);
-  int save = SaveDC(tempdc);
-  SelectObject(tempdc, (HGDIOBJ)id);
-  SelectObject(fl_gc, fl_brush());
-  // secret bitblt code found in old MSWindows reference manual:
-  BitBlt(fl_gc, X, Y, W, H, tempdc, cx, cy, 0xE20746L);
+  typedef BOOL (WINAPI* fl_transp_func)  (HDC,int,int,int,int,HDC,int,int,int,int,UINT);
+  static fl_transp_func fl_TransparentBlt;
+  HDC tempdc;
+  int save;
+  BOOL use_print_algo = false;
+  if (fl_device->type() == Fl_Device::gdi_printer) {
+    static HMODULE hMod = NULL;
+    if (!hMod) {
+      hMod = LoadLibrary("MSIMG32.DLL");
+      if (hMod) fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod, "TransparentBlt");
+      }
+    if (hMod) use_print_algo = true;
+    }
+  if (use_print_algo) { // algorithm for bitmap output to Fl_GDI_Printer
+    Fl_Offscreen tmp_id = fl_create_offscreen(W, H);
+    fl_begin_offscreen(tmp_id);
+    Fl_Color save_c = fl_color(); // save bitmap's desired color
+    uchar r, g, b;
+    Fl::get_color(save_c, r, g, b);
+    r = 255-r;
+    g = 255-g;
+    b = 255-b;
+    Fl_Color background = fl_rgb_color(r, g, b); // a color very different from the bitmap's
+    fl_color(background);
+    fl_rectf(0,0,W,H); // use this color as offscreen background
+    fl_color(save_c); // back to bitmap's color
+    tempdc = CreateCompatibleDC(fl_gc);
+    save = SaveDC(tempdc);
+    SelectObject(tempdc, (HGDIOBJ)id);
+    SelectObject(fl_gc, fl_brush()); // use bitmap's desired color
+    BitBlt(fl_gc, 0, 0, W, H, tempdc, 0, 0, 0xE20746L); // draw bitmap to offscreen
+    fl_end_offscreen(); // offscreen data is in tmp_id
+    SelectObject(tempdc, (HGDIOBJ)tmp_id); // use offscreen data
+    // draw it to printer context with background color as transparent
+    fl_TransparentBlt(fl_gc, X,Y,W,H, tempdc, cx, cy, w(), h(), RGB(r, g, b) ); 
+    fl_delete_offscreen(tmp_id);
+    }
+  else { // algorithm for bitmap output to display
+    tempdc = CreateCompatibleDC(fl_gc);
+    save = SaveDC(tempdc);
+    SelectObject(tempdc, (HGDIOBJ)id);
+    SelectObject(fl_gc, fl_brush());
+    // secret bitblt code found in old MSWindows reference manual:
+    BitBlt(fl_gc, X, Y, W, H, tempdc, cx, cy, 0xE20746L);
+    }
   RestoreDC(tempdc, save);
   DeleteDC(tempdc);
 #elif defined(__APPLE_QUARTZ__)