//
// "$Id: Fl_GDI_Copy_Surface.cxx 11241 2016-02-27 13:52:27Z manolo $"
//
// Copy-to-clipboard code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2016 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file.  If this
// file is missing or damaged, see the license at:
//
//     http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

#include <src/config_lib.h>


#ifdef FL_CFG_GFX_GDI
#include "Fl_GDI_Copy_Surface.H"

Fl_Copy_Surface::Helper::Helper(int w, int h) : Fl_Widget_Surface(NULL), width(w), height(h) {
  driver(new Fl_Translated_GDI_Graphics_Driver);
  oldgc = (HDC)Fl_Surface_Device::surface()->driver()->gc();
  // exact computation of factor from screen units to EnhMetaFile units (0.01 mm)
  HDC hdc = GetDC(NULL);
  int hmm = GetDeviceCaps(hdc, HORZSIZE);
  int hdots = GetDeviceCaps(hdc, HORZRES);
  int vmm = GetDeviceCaps(hdc, VERTSIZE);
  int vdots = GetDeviceCaps(hdc, VERTRES);
  ReleaseDC(NULL, hdc);
  float factorw = (100.f * hmm) / hdots;
  float factorh = (100.f * vmm) / vdots;
  
  RECT rect; rect.left = 0; rect.top = 0; rect.right = (LONG)(w * factorw); rect.bottom = (LONG)(h * factorh);
  gc = CreateEnhMetaFile (NULL, NULL, &rect, NULL);
  if (gc != NULL) {
    SetTextAlign(gc, TA_BASELINE|TA_LEFT);
    SetBkMode(gc, TRANSPARENT);
  }
}

Fl_Copy_Surface::Helper::~Helper() {
  if (oldgc == (HDC)Fl_Surface_Device::surface()->driver()->gc()) oldgc = NULL;
  HENHMETAFILE hmf = CloseEnhMetaFile (gc);
  if ( hmf != NULL ) {
    if ( OpenClipboard (NULL) ){
      EmptyClipboard ();
      SetClipboardData (CF_ENHMETAFILE, hmf);
      CloseClipboard ();
    }
    DeleteEnhMetaFile(hmf);
  }
  DeleteDC(gc);
  Fl_Surface_Device::surface()->driver()->gc(oldgc);
}

void Fl_Copy_Surface::Helper::set_current() {
  driver()->gc(gc);
  fl_window = (Window)1;
  Fl_Surface_Device::set_current();
}

void Fl_Copy_Surface::Helper::translate(int x, int y) {
  ((Fl_Translated_GDI_Graphics_Driver*)driver())->translate_all(x, y);
}

void Fl_Copy_Surface::Helper::untranslate() {
  ((Fl_Translated_GDI_Graphics_Driver*)driver())->untranslate_all();
}
#endif // FL_CFG_GFX_GDI

//
// End of "$Id: Fl_Copy_Surface.H 11220 2016-02-26 12:51:47Z manolo $".
//