c472d5d8b7
This commit also simplifies the platform-dependent support of fl_read_image(): only Fl_XXX_Screen_Driver::read_win_rectangle() contains platform-specific code to capture pixels from the current window or from an offscreen buffer. Platform-independent function Fl_Screen_Driver::traverse_to_gl_subwindows() captures subwindows that intersect with the area fl_read_image() targets. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12653 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
//
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// "$Id$"
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//
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// Draw-to-image code for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2018 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#include "../../config_lib.h"
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#ifdef FL_CFG_GFX_GDI
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#include "Fl_GDI_Graphics_Driver.H"
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#include "../WinAPI/Fl_WinAPI_Screen_Driver.H"
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#include <FL/Fl_Image_Surface.H>
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#include <FL/fl_draw.H>
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#include <FL/platform.H>
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#include <windows.h>
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class Fl_GDI_Image_Surface_Driver : public Fl_Image_Surface_Driver {
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virtual void end_current_(Fl_Surface_Device*);
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public:
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Window pre_window;
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int _savedc;
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Fl_GDI_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off);
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~Fl_GDI_Image_Surface_Driver();
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void set_current();
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void translate(int x, int y);
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void untranslate();
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Fl_RGB_Image *image();
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POINT origin;
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};
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Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen off)
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{
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return new Fl_GDI_Image_Surface_Driver(w, h, high_res, off);
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}
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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, 0) {
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float d = fl_graphics_driver->scale();
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if (!off && d != 1 && high_res) {
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w = int(w*d);
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h = int(h*d);
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}
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HDC gc = (HDC)Fl_Graphics_Driver::default_driver().gc();
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offscreen = off ? off : CreateCompatibleBitmap( (gc ? gc : fl_GetDC(0) ) , w, h);
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if (!offscreen) offscreen = CreateCompatibleBitmap(fl_GetDC(0), w, h);
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driver(new Fl_GDI_Graphics_Driver);
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if (d != 1 && high_res) ((Fl_GDI_Graphics_Driver*)driver())->scale(d);
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origin.x = origin.y = 0;
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}
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Fl_GDI_Image_Surface_Driver::~Fl_GDI_Image_Surface_Driver() {
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if (offscreen) DeleteObject(offscreen);
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delete driver();
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}
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void Fl_GDI_Image_Surface_Driver::set_current() {
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HDC gc = fl_makeDC(offscreen);
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driver()->gc(gc);
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SetWindowOrgEx(gc, origin.x, origin.y, NULL);
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Fl_Surface_Device::set_current();
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pre_window = fl_window;
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_savedc = SaveDC(gc);
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fl_window=(HWND)offscreen;
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}
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void Fl_GDI_Image_Surface_Driver::translate(int x, int y) {
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((Fl_GDI_Graphics_Driver*)driver())->translate_all(x, y);
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}
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void Fl_GDI_Image_Surface_Driver::untranslate() {
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((Fl_GDI_Graphics_Driver*)driver())->untranslate_all();
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}
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Fl_RGB_Image* Fl_GDI_Image_Surface_Driver::image()
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{
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Fl_RGB_Image *image = Fl::screen_driver()->read_win_rectangle( 0, 0, width, height);
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return image;
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}
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void Fl_GDI_Image_Surface_Driver::end_current_(Fl_Surface_Device*)
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{
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HDC gc = (HDC)driver()->gc();
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GetWindowOrgEx(gc, &origin);
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RestoreDC(gc, _savedc);
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DeleteDC(gc);
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fl_window = pre_window;
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}
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#endif // FL_CFG_GFX_GDI
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//
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// End of "$Id$".
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//
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