mirror of
git://projects.qi-hardware.com/eda-tools.git
synced 2024-11-16 23:50:39 +02:00
413 lines
8.7 KiB
C
413 lines
8.7 KiB
C
/*
|
|
* ppmdiff.c - Mark differences in two PPM files
|
|
*
|
|
* Written 2010 by Werner Almesberger
|
|
* Copyright 2010 Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
|
|
|
|
static uint8_t a_only[3] = { 255, 0, 0 };
|
|
static uint8_t b_only[3] = { 0, 255, 0 };
|
|
static uint8_t both[3] = { 220, 220, 220 };
|
|
static uint8_t frame[3] = { 0, 0, 255 };
|
|
static uint8_t frame_fill[3] = { 255, 255, 200 };
|
|
static int frame_dist = 40;
|
|
static int frame_width = 2;
|
|
|
|
|
|
static uint8_t *load_ppm(const char *name, int *x, int *y)
|
|
{
|
|
FILE *file;
|
|
char line[100];
|
|
int this_x, this_y, depth;
|
|
int n;
|
|
uint8_t *img;
|
|
|
|
file = fopen(name, "r");
|
|
if (!file) {
|
|
perror(name);
|
|
exit(1);
|
|
}
|
|
if (!fgets(line, sizeof(line), file)) {
|
|
fprintf(stderr, "can't read file type\n");
|
|
exit(1);
|
|
}
|
|
if (strcmp(line, "P6\n")) {
|
|
fprintf(stderr, "file type must be P6, not %s", line);
|
|
exit(1);
|
|
}
|
|
if (!fgets(line, sizeof(line), file)) {
|
|
fprintf(stderr, "can't read resolution\n");
|
|
exit(1);
|
|
}
|
|
if (sscanf(line, "%d %d", &this_x, &this_y) != 2) {
|
|
fprintf(stderr, "can't parse resolution: %s", line);
|
|
exit(1);
|
|
}
|
|
if (*x || *y) {
|
|
if (*x != this_x || *y != this_y) {
|
|
fprintf(stderr,
|
|
"resolution changed from %dx%d to %dx%d\n",
|
|
*x, *y, this_x, this_y);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
*x = this_x;
|
|
*y = this_y;
|
|
}
|
|
if (!fgets(line, sizeof(line), file)) {
|
|
fprintf(stderr, "can't read depth\n");
|
|
exit(1);
|
|
}
|
|
if (sscanf(line, "%d", &depth) != 1) {
|
|
fprintf(stderr, "can't parse depth: %s", line);
|
|
exit(1);
|
|
}
|
|
if (depth != 255) {
|
|
fprintf(stderr, "depth must be 255, not %d\n", depth);
|
|
exit(1);
|
|
}
|
|
n = *x**y*3;
|
|
img = malloc(n);
|
|
if (!img) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
if (fread(img, 1, n, file) != n) {
|
|
fprintf(stderr, "can't read %d bytes\n", n);
|
|
exit(1);
|
|
}
|
|
fclose(file);
|
|
return img;
|
|
}
|
|
|
|
|
|
static struct area {
|
|
int x0, y0, x1, y1;
|
|
struct area *next;
|
|
} *areas = NULL;
|
|
|
|
|
|
static void add_area(struct area **root, int x0, int y0, int x1, int y1)
|
|
{
|
|
while (*root) {
|
|
struct area *area = *root;
|
|
|
|
if (area->x0 > x1 || area->y0 > y1 ||
|
|
area->x1 < x0 || area->y1 < y0) {
|
|
root = &(*root)->next;
|
|
continue;
|
|
}
|
|
x0 = x0 < area->x0 ? x0 : area->x0;
|
|
y0 = y0 < area->y0 ? y0 : area->y0;
|
|
x1 = x1 > area->x1 ? x1 : area->x1;
|
|
y1 = y1 > area->y1 ? y1 : area->y1;
|
|
*root = area->next;
|
|
free(area);
|
|
add_area(&areas, x0, y0, x1, y1);
|
|
return;
|
|
}
|
|
*root = malloc(sizeof(**root));
|
|
if (!*root) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
(*root)->x0 = x0;
|
|
(*root)->y0 = y0;
|
|
(*root)->x1 = x1;
|
|
(*root)->y1 = y1;
|
|
(*root)->next = NULL;
|
|
}
|
|
|
|
|
|
static void change(int x, int y)
|
|
{
|
|
add_area(&areas,
|
|
x-frame_dist, y-frame_dist, x+frame_dist, y+frame_dist);
|
|
}
|
|
|
|
|
|
static void set_pixel(uint8_t *p, const uint8_t *color, const uint8_t *value)
|
|
{
|
|
double f;
|
|
int i;
|
|
|
|
f = (255-(value[0] | value[1] | value[2]))/255.0;
|
|
for (i = 0; i != 3; i++)
|
|
p[i] = 255-(255-color[i])*f;
|
|
}
|
|
|
|
|
|
static uint8_t *diff(const uint8_t *a, const uint8_t *b, int xres, int yres,
|
|
int mark_areas)
|
|
{
|
|
uint8_t *res, *p;
|
|
int x, y;
|
|
unsigned val_a, val_b;
|
|
|
|
res = p = malloc(xres*yres*3);
|
|
if (!res) {
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
for (y = 0; y != yres; y++)
|
|
for (x = 0; x != xres; x++) {
|
|
val_a = a[0]+a[1]+a[2];
|
|
val_b = b[0]+b[1]+b[2];
|
|
if (val_a == val_b) {
|
|
set_pixel(p, both, b);
|
|
} else if (val_a < val_b) {
|
|
set_pixel(p, a_only, a);
|
|
if (mark_areas)
|
|
change(x, y);
|
|
} else if (val_a > val_b) {
|
|
set_pixel(p, b_only, b);
|
|
if (mark_areas)
|
|
change(x, y);
|
|
} else {
|
|
abort(); /* no longer used */
|
|
memset(p, 255, 3);
|
|
// memcpy(p, "\0\0\xff", 3);
|
|
}
|
|
a += 3;
|
|
b += 3;
|
|
p += 3;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
static void shadow_diff(const uint8_t *a, const uint8_t *b, int xres, int yres)
|
|
{
|
|
int x, y;
|
|
|
|
for (y = 0; y != yres; y++)
|
|
for (x = 0; x != xres; x++) {
|
|
if (memcmp(a, b, 3))
|
|
change(x, y);
|
|
a += 3;
|
|
b += 3;
|
|
}
|
|
}
|
|
|
|
|
|
static void point(uint8_t *img, int x, int y, int xres, int yres)
|
|
{
|
|
uint8_t *p;
|
|
|
|
if (x < 0 || y < 0 || x >= xres || y >= yres)
|
|
return;
|
|
p = img+(y*xres+x)*3;
|
|
if ((p[0] & p[1] & p[2]) != 255)
|
|
return;
|
|
memcpy(p, frame, 3);
|
|
}
|
|
|
|
|
|
static void hline(uint8_t *img, int x0, int x1, int y, int xres, int yres)
|
|
{
|
|
int x;
|
|
|
|
for (x = x0; x <= x1; x++)
|
|
point(img, x, y, xres, yres);
|
|
}
|
|
|
|
|
|
static void vline(uint8_t *img, int y0, int y1, int x, int xres, int yres)
|
|
{
|
|
int y;
|
|
|
|
for (y = y0; y <= y1; y++)
|
|
point(img, x, y, xres, yres);
|
|
}
|
|
|
|
|
|
static void fill(uint8_t *img, int x0, int y0, int x1, int y1,
|
|
int xres, int yres)
|
|
{
|
|
int x, y;
|
|
uint8_t *p;
|
|
|
|
for (y = y0; y <= y1; y++) {
|
|
if (y < 0 || y >= yres)
|
|
continue;
|
|
p = img+(xres*y+x0)*3;
|
|
for (x = x0; x <= x1; x++) {
|
|
if (x >= 0 && x < xres && (p[0] & p[1] & p[2]) == 255)
|
|
memcpy(p, frame_fill, 3);
|
|
p += 3;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void mark_areas(uint8_t *img, int x, int y)
|
|
{
|
|
const struct area *area;
|
|
int r1 = 0, r2 = 0, i;
|
|
|
|
if (frame_width) {
|
|
r1 = (frame_width-1)/2;
|
|
r2 = (frame_width-1)-r1;
|
|
}
|
|
for (area = areas; area; area = area->next) {
|
|
if (frame_width)
|
|
for (i = -r1; i <= r2; i++) {
|
|
hline(img, area->x0-r1, area->x1+r2, area->y0+i,
|
|
x, y);
|
|
hline(img, area->x0-r1, area->x1+r2, area->y1+i,
|
|
x, y);
|
|
vline(img, area->y0+r1, area->y1-r2, area->x0+i,
|
|
x, y);
|
|
vline(img, area->y0+r1, area->y1-r2, area->x1+i,
|
|
x, y);
|
|
}
|
|
fill(img,
|
|
area->x0+r1, area->y0+r1, area->x1-r2, area->y1-r2, x, y);
|
|
}
|
|
}
|
|
|
|
|
|
static void usage(const char *name)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s [-f] [-a color] [-b color] [-c color] [-d pixels]\n"
|
|
"%6s %*s [-m color] [-n color] [-w pixels] file_a.ppm file_b.ppm\n"
|
|
"%6s %*s [file_a'.ppm file_b'.ppm] [out.ppm]\n\n"
|
|
" file_a.ppm and file_b.ppm are two input images\n"
|
|
" file_a'.ppm and file_b'.ppm if present, are searched for changes as well\n"
|
|
" out.ppm output file (default: standard output)\n\n"
|
|
" -f generate output (and return success) even if there is no change\n"
|
|
" -a color color of items only in image A\n"
|
|
" -b color color of items only in image B\n"
|
|
" -c color color of items in both images\n"
|
|
" -d pixels distance between change and marker box. 0 disables markers.\n"
|
|
" -m color color of the frame of the marker box.\n"
|
|
" -n color color of the background of the marker box\n"
|
|
" -w pixels width of the frame of the marker box. 0 disables frames.\n\n"
|
|
" color is specified as R,B,G with each component as a floating-point\n"
|
|
" value from 0 to 1. E.g., 1,1,1 is white.\n\n"
|
|
" The images are expected to have dark colors on a perfectly white\n"
|
|
" background.\n"
|
|
, name, "", (int) strlen(name), "", "", (int) strlen(name), "");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
static void parse_color(uint8_t *c, const char *s, const char *name)
|
|
{
|
|
float r, g, b;
|
|
|
|
if (sscanf(s, "%f,%f,%f", &r, &g, &b) != 3)
|
|
usage(name);
|
|
c[0] = 255*r;
|
|
c[1] = 255*g;
|
|
c[2] = 255*b;
|
|
}
|
|
|
|
|
|
int main(int argc, char *const *argv)
|
|
{
|
|
int force = 0;
|
|
int x = 0, y = 0;
|
|
uint8_t *old, *new, *d, *a, *b;
|
|
char *shadow_old = NULL, *shadow_new = NULL, *out_name = NULL;
|
|
FILE *out;
|
|
char *end;
|
|
int c;
|
|
|
|
while ((c = getopt(argc, argv, "a:b:c:d:fm:n:w:")) != EOF)
|
|
switch (c) {
|
|
case 'a':
|
|
parse_color(a_only, optarg, *argv);
|
|
break;
|
|
case 'b':
|
|
parse_color(b_only, optarg, *argv);
|
|
break;
|
|
case 'c':
|
|
parse_color(both, optarg, *argv);
|
|
break;
|
|
case 'd':
|
|
frame_dist = strtoul(optarg, &end, 0);
|
|
if (*end)
|
|
usage(*argv);
|
|
break;
|
|
case 'f':
|
|
force = 1;
|
|
break;
|
|
case 'm':
|
|
parse_color(frame, optarg, *argv);
|
|
break;
|
|
case 'n':
|
|
parse_color(frame_fill, optarg, *argv);
|
|
break;
|
|
case 'w':
|
|
frame_width = strtoul(optarg, &end, 0);
|
|
if (*end)
|
|
usage(*argv);
|
|
break;
|
|
default:
|
|
usage(*argv);
|
|
}
|
|
switch (argc-optind) {
|
|
case 2:
|
|
break;
|
|
case 3:
|
|
out_name = argv[optind+2];
|
|
break;
|
|
case 5:
|
|
out_name = argv[optind+4];
|
|
/* fall through */
|
|
case 4:
|
|
shadow_old = argv[optind+2];
|
|
shadow_new = argv[optind+3];
|
|
break;
|
|
default:
|
|
usage(*argv);
|
|
}
|
|
|
|
old = load_ppm(argv[optind], &x, &y);
|
|
new = load_ppm(argv[optind+1], &x, &y);
|
|
if (shadow_old) {
|
|
a = load_ppm(shadow_old, &x, &y);
|
|
b = load_ppm(shadow_new, &x, &y);
|
|
if (!force && !memcmp(a, b, x*y*3))
|
|
return 1;
|
|
shadow_diff(a, b, x, y);
|
|
}
|
|
if (!force && !areas && !memcmp(old, new, x*y*3))
|
|
return 1;
|
|
d = diff(old, new, x, y, !shadow_old);
|
|
if (frame_dist)
|
|
mark_areas(d, x, y);
|
|
|
|
if (out_name) {
|
|
out = fopen(out_name, "w");
|
|
if (!out) {
|
|
perror(out_name);
|
|
exit(1);
|
|
}
|
|
} else {
|
|
out = stdout;
|
|
}
|
|
fprintf(out, "P6\n%d %d\n255\n", x, y);
|
|
fwrite(d, 1, x*y*3, out);
|
|
if (fclose(out) == EOF) {
|
|
perror("fclose");
|
|
exit(1);
|
|
}
|
|
return 0;
|
|
}
|