ref: bee35b5750748cf101a6924543e46ec3f9c783ba
dir: /DoConfig/fltk/src/fl_draw_image_mac.cxx/
//
// "$Id$"
//
// MacOS image drawing code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2012 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.h>
#include <FL/Fl.H>
#include <FL/fl_draw.H>
#include <FL/Fl_Printer.H>
#include <FL/x.H>
#define MAXBUFFER 0x40000 // 256k
static void dataReleaseCB(void *info, const void *data, size_t size)
{
delete[] (uchar *)data;
}
/*
* draw an image based on the input parameters
*
* buf: image source data
* X, Y: position (in buffer?!)
* W, H: size of picture (in pixel?)
* delta: distance from pixel to pixel in buf in bytes
* linedelta: distance from line to line in buf in bytes
* mono: if set, pixel is one byte - if zero, pixel is 3 byte
* cb: callback to copy image data into (RGB?) buffer
* buf: pointer to first byte in image source
* x, y: position in buffer
* w: width (in bytes?)
* dst: destination buffer
* userdata: ?
*/
static void innards(const uchar *buf, int X, int Y, int W, int H,
int delta, int linedelta, int mono,
Fl_Draw_Image_Cb cb, void* userdata)
{
if (!linedelta) linedelta = W*abs(delta);
uchar *tmpBuf = 0;
if (!cb) {
if (delta < 0) buf -= (W-1)*(-delta);
if (linedelta < 0) buf -= (H-1)*(-linedelta);
}
const void *array = buf;
if (cb || Fl_Surface_Device::surface() != Fl_Display_Device::display_device()) {
tmpBuf = new uchar[ H*W*abs(delta) ];
if (cb) {
for (int i=0; i<H; i++) {
cb(userdata, 0, i, W, tmpBuf+i*W*abs(delta));
}
} else {
uchar *p = tmpBuf;
for (int i=0; i<H; i++) {
memcpy(p, buf+i*abs(linedelta), W*abs(delta));
p += W*abs(delta);
}
}
array = (void*)tmpBuf;
linedelta = W*abs(delta);
}
// create an image context
CGColorSpaceRef lut = 0;
if (abs(delta) <= 2)
lut = CGColorSpaceCreateDeviceGray();
else
lut = CGColorSpaceCreateDeviceRGB();
// a release callback is necessary when the fl_gc is a print context because the image data
// must be kept until the page is closed. Thus tmpBuf can't be deleted here. It's too early.
CGDataProviderRef src = CGDataProviderCreateWithData( 0L, array, abs(linedelta)*H,
tmpBuf ? dataReleaseCB : NULL
);
CGImageRef img = CGImageCreate( W, H, 8, 8*abs(delta), abs(linedelta),
lut, abs(delta)&1?kCGImageAlphaNone:kCGImageAlphaNoneSkipLast,
//lut, delta&1?kCGImageAlphaNone:kCGImageAlphaLast,
src, 0L, false, kCGRenderingIntentDefault);
// draw the image into the destination context
if (img) {
CGRect rect = CGRectMake( X, Y, W, H);
Fl_X::q_begin_image(rect, 0, 0, W, H);
if (linedelta < 0) {
CGContextTranslateCTM(fl_gc, 0, H);
CGContextScaleCTM(fl_gc, 1, -1);
}
if (delta < 0) {
CGContextTranslateCTM(fl_gc, W, 0);
CGContextScaleCTM(fl_gc, -1, 1);
}
CGContextDrawImage(fl_gc, rect, img);
Fl_X::q_end_image();
// release all allocated resources
CGImageRelease(img);
}
CGColorSpaceRelease(lut);
CGDataProviderRelease(src);
if (img) return; // else fall through to slow mode
// following the very save (and very slow) way to write the image into the give port
CGContextSetShouldAntialias(fl_gc, false);
if ( cb )
{
uchar *tmpBuf = new uchar[ W*4 ];
for ( int i=0; i<H; i++ )
{
uchar *src = tmpBuf;
cb( userdata, 0, i, W, tmpBuf );
for ( int j=0; j<W; j++ )
{
if ( mono )
{ fl_color( src[0], src[0], src[0] ); }
else
{ fl_color( src[0], src[1], src[2] ); }
CGContextMoveToPoint(fl_gc, X+j, Y+i);
CGContextAddLineToPoint(fl_gc, X+j, Y+i);
CGContextStrokePath(fl_gc);
src+=delta;
}
}
delete[] tmpBuf;
}
else
{
for ( int i=0; i<H; i++ )
{
const uchar *src = buf+i*linedelta;
for ( int j=0; j<W; j++ )
{
if ( mono )
fl_color( src[0], src[0], src[0] );
else
fl_color( src[0], src[1], src[2] );
CGContextMoveToPoint(fl_gc, X+j, Y+i);
CGContextAddLineToPoint(fl_gc, X+j, Y+i);
CGContextStrokePath(fl_gc);
src += delta;
}
}
}
CGContextSetShouldAntialias(fl_gc, true);
}
void Fl_Quartz_Graphics_Driver::draw_image(const uchar* buf, int x, int y, int w, int h, int d, int l){
innards(buf,x,y,w,h,d,l,(d<3&&d>-3),0,0);
}
void Fl_Quartz_Graphics_Driver::draw_image(Fl_Draw_Image_Cb cb, void* data,
int x, int y, int w, int h,int d) {
innards(0,x,y,w,h,d,0,(d<3&&d>-3),cb,data);
}
void Fl_Quartz_Graphics_Driver::draw_image_mono(const uchar* buf, int x, int y, int w, int h, int d, int l){
innards(buf,x,y,w,h,d,l,1,0,0);
}
void Fl_Quartz_Graphics_Driver::draw_image_mono(Fl_Draw_Image_Cb cb, void* data,
int x, int y, int w, int h,int d) {
innards(0,x,y,w,h,d,0,1,cb,data);
}
void fl_rectf(int x, int y, int w, int h, uchar r, uchar g, uchar b) {
fl_color(r,g,b);
fl_rectf(x,y,w,h);
}
//
// End of "$Id$".
//