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/*
* image.c
* Copyright (c) 2021 Ben Fuller
*/
#include <cairo.h>
#include <stdio.h>
#include "cgol.h"
/* cells[i][j]; i = img->ny; j = img->nx */
int
png(struct imgdata *img, short *cells, char *fname)
{
double width, height, scale;
int nx, ny;
cairo_surface_t *surface;
cairo_t *cr;
scale = 1;
width = img->width;
height = img->height;
nx = img->nx;
ny = img->ny;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
cr = cairo_create(surface);
cairo_scale(cr, scale, scale);
/* background fill */
cairo_set_source_rgb(cr, img->b.r, img->b.g, img->b.b);
cairo_rectangle(cr, 0, 0, width/scale, height/scale);
cairo_fill(cr);
for (int i = 0; i < ny; i++) {
for (int j = 0; j < nx; j++) {
if (*(cells + i * nx + j))
cairo_set_source_rgb(cr, img->a.r, img->a.g, img->a.b);
else
cairo_set_source_rgb(cr, img->i.r, img->i.g, img->i.b);
cairo_rectangle(cr, j * width/nx/scale, i * height/ny/scale,
width/nx/scale * 0.9,
height/ny/scale * 0.9);
cairo_fill(cr);
}
}
cairo_status_t crs;
crs = cairo_status(cr);
if (crs != CAIRO_STATUS_SUCCESS) {
fprintf(stderr, "cairo: %s\n", cairo_status_to_string(crs));
cairo_destroy(cr);
cairo_surface_destroy(surface);
return 1;
}
/* Write output and clean up */
cairo_surface_write_to_png(surface, fname);
cairo_destroy(cr);
cairo_surface_destroy(surface);
return 0;
}
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