5bb4e853c7
This ensures API compatibility with FLTK 1.3 where Fl_Surface_Device->set_current() is used to change the current drawing surface. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12125 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
121 lines
3.5 KiB
C++
121 lines
3.5 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 1998-2016 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_QUARTZ
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#include <FL/x.H>
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#include <FL/fl_draw.H>
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#include <FL/Fl_Image_Surface.H>
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#include "Fl_Quartz_Graphics_Driver.H"
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#include <ApplicationServices/ApplicationServices.h>
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class Fl_Quartz_Image_Surface_Driver : public Fl_Image_Surface_Driver {
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friend class Fl_Image_Surface;
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virtual void end_current_();
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public:
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Fl_Surface_Device *previous;
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Window pre_window;
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Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res);
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~Fl_Quartz_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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};
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Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen)
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{
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return new Fl_Quartz_Image_Surface_Driver(w, h, high_res);
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}
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Fl_Quartz_Image_Surface_Driver::Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res) : Fl_Image_Surface_Driver(w, h, high_res, 0) {
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previous = 0;
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int W = high_res ? 2*w : w;
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int H = high_res ? 2*h : h;
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CGColorSpaceRef lut = CGColorSpaceCreateDeviceRGB();
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offscreen = CGBitmapContextCreate(calloc(W*H,4), W, H, 8, W*4, lut, kCGImageAlphaPremultipliedLast);
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CGColorSpaceRelease(lut);
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driver(new Fl_Quartz_Graphics_Driver);
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CGContextTranslateCTM(offscreen, 0.5, -0.5); // as when drawing to a window
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if (high_res) {
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CGContextScaleCTM(offscreen, 2, 2);
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}
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CGContextSetShouldAntialias(offscreen, false);
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CGContextSaveGState(offscreen);
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CGContextTranslateCTM(offscreen, 0, height);
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CGContextScaleCTM(offscreen, 1.0f, -1.0f);
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CGContextSetRGBFillColor(offscreen, 1, 1, 1, 0);
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CGContextFillRect(offscreen, CGRectMake(0,0,w,h));
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}
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Fl_Quartz_Image_Surface_Driver::~Fl_Quartz_Image_Surface_Driver() {
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if (offscreen) {
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void *data = CGBitmapContextGetData(offscreen);
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free(data);
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CGContextRelease((CGContextRef)offscreen);
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}
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delete driver();
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}
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void Fl_Quartz_Image_Surface_Driver::set_current() {
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pre_window = fl_window;
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if (!previous) previous = Fl_Surface_Device::surface();
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driver()->gc(offscreen);
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fl_window = 0;
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Fl_Surface_Device::set_current();
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((Fl_Quartz_Graphics_Driver*)driver())->high_resolution( CGBitmapContextGetWidth(offscreen) > width );
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}
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void Fl_Quartz_Image_Surface_Driver::translate(int x, int y) {
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CGContextRestoreGState(offscreen);
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CGContextSaveGState(offscreen);
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CGContextTranslateCTM(offscreen, x, -y);
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CGContextSaveGState(offscreen);
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CGContextTranslateCTM(offscreen, 0, height);
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CGContextScaleCTM(offscreen, 1.0f, -1.0f);
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}
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void Fl_Quartz_Image_Surface_Driver::untranslate() {
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CGContextRestoreGState(offscreen);
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}
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Fl_RGB_Image* Fl_Quartz_Image_Surface_Driver::image()
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{
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CGContextFlush(offscreen);
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int W = CGBitmapContextGetWidth(offscreen);
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int H = CGBitmapContextGetHeight(offscreen);
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unsigned char *data = fl_read_image(NULL, 0, 0, W, H, 0);
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Fl_RGB_Image *image = new Fl_RGB_Image(data, W, H);
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image->alloc_array = 1;
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return image;
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}
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void Fl_Quartz_Image_Surface_Driver::end_current_()
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{
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fl_window = pre_window;
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}
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#endif // FL_CFG_GFX_QUARTZ
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//
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// End of "$Id$".
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//
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