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//
// Draw-to-image code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2018 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:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
#include "Fl_GDI_Graphics_Driver.H"
#include "../WinAPI/Fl_WinAPI_Screen_Driver.H"
#include <FL/Fl_Image_Surface.H>
#include <FL/platform.H>
#include <windows.h>
class Fl_GDI_Image_Surface_Driver : public Fl_Image_Surface_Driver {
virtual void end_current();
public:
Window pre_window;
int _savedc;
Fl_GDI_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off);
~Fl_GDI_Image_Surface_Driver();
void set_current();
void translate(int x, int y);
void untranslate();
Fl_RGB_Image *image();
POINT origin;
};
Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen off)
{
return new Fl_GDI_Image_Surface_Driver(w, h, high_res, off);
}
Fl_GDI_Image_Surface_Driver::Fl_GDI_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off) : Fl_Image_Surface_Driver(w, h, high_res, off) {
float d = fl_graphics_driver->scale();
if (!off && d != 1 && high_res) {
w = int(w*d);
h = int(h*d);
}
HDC gc = (HDC)Fl_Graphics_Driver::default_driver().gc();
offscreen = off ? off : CreateCompatibleBitmap( (gc ? gc : fl_GetDC(0) ) , w, h);
if (!offscreen) offscreen = CreateCompatibleBitmap(fl_GetDC(0), w, h);
driver(new Fl_GDI_Graphics_Driver);
if (d != 1 && high_res) ((Fl_GDI_Graphics_Driver*)driver())->scale(d);
origin.x = origin.y = 0;
}
Fl_GDI_Image_Surface_Driver::~Fl_GDI_Image_Surface_Driver() {
if (offscreen && !external_offscreen) DeleteObject(offscreen);
delete driver();
}
void Fl_GDI_Image_Surface_Driver::set_current() {
HDC gc = fl_makeDC(offscreen);
driver()->gc(gc);
SetWindowOrgEx(gc, origin.x, origin.y, NULL);
Fl_Surface_Device::set_current();
pre_window = fl_window;
_savedc = SaveDC(gc);
fl_window=(HWND)offscreen;
}
void Fl_GDI_Image_Surface_Driver::translate(int x, int y) {
((Fl_GDI_Graphics_Driver*)driver())->translate_all(x, y);
}
void Fl_GDI_Image_Surface_Driver::untranslate() {
((Fl_GDI_Graphics_Driver*)driver())->untranslate_all();
}
Fl_RGB_Image* Fl_GDI_Image_Surface_Driver::image()
{
Fl_RGB_Image *image = Fl::screen_driver()->read_win_rectangle( 0, 0, width, height, 0);
return image;
}
void Fl_GDI_Image_Surface_Driver::end_current()
{
HDC gc = (HDC)driver()->gc();
GetWindowOrgEx(gc, &origin);
RestoreDC(gc, _savedc);
DeleteDC(gc);
fl_window = pre_window;
Fl_Surface_Device::end_current();
}
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