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//
// "$Id$"
//
// WIN32 image reading routines for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2009 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include <config.h>
extern unsigned char *MACbitmapFromRectOfWindow(Fl_Window *win, int x, int y, int w, int h, int *bytesPerPixel);
//
// 'fl_read_image()' - Read an image from the current window.
//
uchar * // O - Pixel buffer or NULL if failed
fl_read_image(uchar *p, // I - Pixel buffer or NULL to allocate
int x, // I - Left position
int y, // I - Top position
int w, // I - Width of area to read
int h, // I - Height of area to read
int alpha) { // I - Alpha value for image (0 for none)
Fl_Window *window = Fl_Window::current();
while(window->window()) window = window->window();
int delta;
uchar *base = MACbitmapFromRectOfWindow(window,x,y,w,h,&delta);
int rowBytes = delta*w;
// Allocate the image data array as needed...
int d = alpha ? 4 : 3;
if (!p) p = new uchar[w * h * d];
// Initialize the default colors/alpha in the whole image...
memset(p, alpha, w * h * d);
// Copy the image from the off-screen buffer to the memory buffer.
int idx, idy; // Current X & Y in image
uchar *pdst, *psrc;
for (idy = 0, pdst = p; idy < h; idy ++) {
for (idx = 0, psrc = base + idy * rowBytes; idx < w; idx ++, psrc += delta, pdst += d) {
pdst[0] = psrc[0]; // R
pdst[1] = psrc[1]; // G
pdst[2] = psrc[2]; // B
}
}
delete base;
return p;
}
//
// End of "$Id$".
//
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