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//
// "$Id: Fl_Quartz_Image_Surface.cxx 11278 2016-03-03 19:16:22Z manolo $"
//
// Draw-to-image 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 "../../config_lib.h"
#ifdef FL_CFG_GFX_QUARTZ
#include <FL/x.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Image_Surface.H>
#include "Fl_Quartz_Graphics_Driver.H"
#include <ApplicationServices/ApplicationServices.h>
class Fl_Quartz_Image_Surface_Driver : public Fl_Image_Surface_Driver {
friend class Fl_Image_Surface;
public:
Fl_Surface_Device *previous;
Window pre_window;
int was_high;
Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res);
~Fl_Quartz_Image_Surface_Driver();
void set_current();
void translate(int x, int y);
void untranslate();
Fl_RGB_Image *image();
void end_current();
};
Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen)
{
return new Fl_Quartz_Image_Surface_Driver(w, h, high_res);
}
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) {
previous = 0;
int W = high_res ? 2*w : w;
int H = high_res ? 2*h : h;
CGColorSpaceRef lut = CGColorSpaceCreateDeviceRGB();
offscreen = CGBitmapContextCreate(calloc(W*H,4), W, H, 8, W*4, lut, kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(lut);
driver(new Fl_Quartz_Graphics_Driver);
CGContextTranslateCTM(offscreen, 0.5, -0.5); // as when drawing to a window
if (high_res) {
CGContextScaleCTM(offscreen, 2, 2);
}
CGContextSetShouldAntialias(offscreen, false);
CGContextSaveGState(offscreen);
CGContextTranslateCTM(offscreen, 0, height);
CGContextScaleCTM(offscreen, 1.0f, -1.0f);
CGContextSetRGBFillColor(offscreen, 1, 1, 1, 0);
CGContextFillRect(offscreen, CGRectMake(0,0,w,h));
}
Fl_Quartz_Image_Surface_Driver::~Fl_Quartz_Image_Surface_Driver() {
if (offscreen) {
void *data = CGBitmapContextGetData(offscreen);
free(data);
CGContextRelease((CGContextRef)offscreen);
}
}
void Fl_Quartz_Image_Surface_Driver::set_current() {
pre_window = fl_window;
if (!previous) previous = Fl_Surface_Device::surface();
driver()->gc(offscreen);
fl_window = 0;
Fl_Surface_Device::set_current();
was_high = Fl_Display_Device::high_resolution();
Fl_X::set_high_resolution( CGBitmapContextGetWidth(offscreen) > width );
}
void Fl_Quartz_Image_Surface_Driver::translate(int x, int y) {
CGContextRestoreGState(offscreen);
CGContextSaveGState(offscreen);
CGContextTranslateCTM(offscreen, x, -y);
CGContextSaveGState(offscreen);
CGContextTranslateCTM(offscreen, 0, height);
CGContextScaleCTM(offscreen, 1.0f, -1.0f);
}
void Fl_Quartz_Image_Surface_Driver::untranslate() {
CGContextRestoreGState(offscreen);
}
Fl_RGB_Image* Fl_Quartz_Image_Surface_Driver::image()
{
CGContextFlush(offscreen);
int W = CGBitmapContextGetWidth(offscreen);
int H = CGBitmapContextGetHeight(offscreen);
unsigned char *data = fl_read_image(NULL, 0, 0, W, H, 0);
Fl_RGB_Image *image = new Fl_RGB_Image(data, W, H);
image->alloc_array = 1;
return image;
}
void Fl_Quartz_Image_Surface_Driver::end_current()
{
Fl_X::set_high_resolution(was_high);
previous->Fl_Surface_Device::set_current();
fl_window = pre_window;
}
#endif // FL_CFG_GFX_QUARTZ
//
// End of "$Id: Fl_Quartz_Image_Surface.cxx 11220 2016-02-26 12:51:47Z manolo $".
//
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