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//
// DataImage routines.
//
// Copyright 2006 by Johannes Hofmann
//
// 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.
//
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
extern "C" {
#include <jpeglib.h>
}
#include <Fl/fl_draw.h>
#include "DataImage.H"
DataImage::DataImage(int X, int Y, int W, int H): Fl_Widget(X, Y, W, H) {
d = 3;
data = (uchar*) malloc(W * H * d);
memset(data, 200, W * H * d);
}
DataImage::~DataImage() {
}
int
DataImage::set_pixel(int x, int y, char r, char g, char b) {
if (x < 0 || x >= w() || y < 0 || y >= h()) {
return 1;
}
long index = (y * w() * d + (x * d)); // X/Y -> buf index
*(data+index+0) = r;
*(data+index+1) = g;
*(data+index+2) = b;
return 0;
}
void
DataImage::draw() {
fl_push_clip(x(), y(), w(), h());
fl_draw_image(data, x(), y(), w(), h(), d);
fl_pop_clip();
}
int
DataImage::get_pixel_bilinear(Fl_Image *img, double x, double y,
char *r, char *g, char *b) {
}
int
DataImage::get_pixel_nearest(Fl_Image *img, double x, double y,
char *r, char *g, char *b) {
if (isnan(x) || isnan(y)) {
return 1;
} else {
return get_pixel(img, (int) rint(x), (int) rint(y), r, g, b);
}
}
int
DataImage::get_pixel(Fl_Image *img, int x, int y,
char *r, char *g, char *b) {
if ( img->d() == 0 ) {
return 1;
}
if (x < 0 || x >=img->w() || y < 0 || y >= img->h()) {
return 1;
}
long index = (y * img->w() * img->d()) + (x * img->d()); // X/Y -> buf index
switch ( img->count() ) {
case 1: { // bitmap
const char *buf = img->data()[0];
switch ( img->d() ) {
case 1: { // 8bit
*r = *g = *b = *(buf+index);
break;
}
case 3: // 24bit
*r = *(buf+index+0);
*g = *(buf+index+1);
*b = *(buf+index+2);
break;
default: // ??
printf("Not supported: chans=%d\n", img->d());
return 1;
}
break;
}
default: // ?? pixmap, bit vals
printf("Not supported: count=%d\n", img->count());
exit(1);
}
return 0;
}
int
DataImage::write_jpeg(const char *file, int quality) {
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE *outfile;
JSAMPROW row_pointer[1];
int row_stride;
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);
if ((outfile = fopen(file, "wb")) == NULL) {
fprintf(stderr, "can't open %s\n", file);
return 1;
}
jpeg_stdio_dest(&cinfo, outfile);
cinfo.image_width = w();
cinfo.image_height = h();
cinfo.input_components = 3; /* # of color components per pixel */
cinfo.in_color_space = JCS_RGB;
jpeg_set_defaults(&cinfo);
jpeg_set_quality(&cinfo, quality, TRUE);
jpeg_start_compress(&cinfo, TRUE);
row_stride = w() * 3; /* JSAMPLEs per row in image_buffer */
while (cinfo.next_scanline < cinfo.image_height) {
row_pointer[0] = & data[cinfo.next_scanline * row_stride];
jpeg_write_scanlines(&cinfo, row_pointer, 1);
}
jpeg_finish_compress(&cinfo);
fclose(outfile);
jpeg_destroy_compress(&cinfo);
return 0;
}
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