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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/platform.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Image_Surface.H>
#include "Fl_Quartz_Graphics_Driver.H"
#include "../Cocoa/Fl_Cocoa_Window_Driver.H"
#include <ApplicationServices/ApplicationServices.h>
class Fl_Quartz_Image_Surface_Driver : public Fl_Image_Surface_Driver {
virtual void end_current();
public:
Window pre_window;
Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off);
~Fl_Quartz_Image_Surface_Driver();
void set_current();
void translate(int x, int y);
void untranslate();
Fl_RGB_Image *image();
};
/**
\cond DriverDev
\addtogroup DriverDeveloper
\{
*/
Fl_Image_Surface_Driver *Fl_Image_Surface_Driver::newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen off)
{
return new Fl_Quartz_Image_Surface_Driver(w, h, high_res, off);
}
/**
\}
\endcond
*/
Fl_Quartz_Image_Surface_Driver::Fl_Quartz_Image_Surface_Driver(int w, int h, int high_res, Fl_Offscreen off) : Fl_Image_Surface_Driver(w, h, high_res, off) {
int W = w, H = h;
float s = 1;
if (high_res) {
s = Fl_Graphics_Driver::default_driver().scale();
Fl_Window *cw = Fl_Window::current();
if (cw && Fl_Cocoa_Window_Driver::driver(cw)->mapped_to_retina()) s *= 2;
W *= s; H *= s;
}
CGColorSpaceRef lut = CGColorSpaceCreateDeviceRGB();
offscreen = off ? off : CGBitmapContextCreate(calloc(W*H,4), W, H, 8, W*4, lut, kCGImageAlphaPremultipliedLast);
CGColorSpaceRelease(lut);
driver(new Fl_Quartz_Graphics_Driver);
CGContextTranslateCTM(offscreen, 0.5*s, -0.5*s); // as when drawing to a window
if (high_res) {
CGContextScaleCTM(offscreen, s, s);
driver()->scale(s);
}
CGContextSetShouldAntialias(offscreen, false);
CGContextTranslateCTM(offscreen, 0, height);
CGContextScaleCTM(offscreen, 1.0f, -1.0f);
CGContextSaveGState(offscreen);
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 && !external_offscreen) {
void *data = CGBitmapContextGetData(offscreen);
free(data);
CGContextRelease((CGContextRef)offscreen);
}
delete driver();
}
void Fl_Quartz_Image_Surface_Driver::set_current() {
Fl_Surface_Device::set_current();
pre_window = fl_window;
driver()->gc(offscreen);
fl_window = 0;
((Fl_Quartz_Graphics_Driver*)driver())->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);
}
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);
int bpr = CGBitmapContextGetBytesPerRow(offscreen);
int bpp = CGBitmapContextGetBitsPerPixel(offscreen)/8;
uchar *base = (uchar*)CGBitmapContextGetData(offscreen);
int idx, idy;
uchar *pdst, *psrc;
unsigned char *data = new uchar[W * H * 3];
for (idy = 0, pdst = data; idy < H; idy ++) {
for (idx = 0, psrc = base + idy * bpr; idx < W; idx ++, psrc += bpp, pdst += 3) {
pdst[0] = psrc[0]; // R
pdst[1] = psrc[1]; // G
pdst[2] = psrc[2]; // B
}
}
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_window = pre_window;
Fl_Surface_Device::end_current();
}
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