Author: manolo
Date: 2010-03-05 05:03:10 -0800 (Fri, 05 Mar 2010)
New Revision: 7218
Log:
Fl_Bitmap now prints with correct color and transparency on MSWindows.
Modified:
branches/branch-1.3-Fl_Printer/src/Fl_Bitmap.cxx
Modified: branches/branch-1.3-Fl_Printer/src/Fl_Bitmap.cxx
===================================================================
--- branches/branch-1.3-Fl_Printer/src/Fl_Bitmap.cxx 2010-03-05 10:10:38 UTC
(rev 7217)
+++ branches/branch-1.3-Fl_Printer/src/Fl_Bitmap.cxx 2010-03-05 13:03:10 UTC
(rev 7218)
@@ -298,21 +298,48 @@
#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());
- 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 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) {
- typedef BOOL (WINAPI* fl_transp_func)
(HDC,int,int,int,int,HDC,int,int,int,int,UINT);
- fl_transp_func fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod,
"TransparentBlt");
- fl_TransparentBlt(fl_gc, X,Y,W,H, tempdc, cx, cy, w(), h(), RGB(0,0,0) );
+ if (!hMod) {
+ hMod = LoadLibrary("MSIMG32.DLL");
+ if (hMod) fl_TransparentBlt = (fl_transp_func)GetProcAddress(hMod,
"TransparentBlt");
}
- else BitBlt(fl_gc, X, Y, W, H, tempdc, cx, cy, SRCCOPY);
+ if (hMod) use_print_algo = true;
}
- else {
+ 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);
}
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