# HG changeset patch
# User John Tsiombikas <nuclear@member.fsf.org>
# Date 1444344312 -10800
# Node ID c438411b801b67435a99e4e5803d4a9846cb7c22
# Parent  960cea2731c4c9e6da69069ac0b8d2d5b16fb397
latest changes from svn (saving grad files)

diff -r 960cea2731c4 -r c438411b801b Makefile
--- a/Makefile	Tue Jun 19 05:30:45 2012 +0300
+++ b/Makefile	Fri Oct 09 01:45:12 2015 +0300
@@ -2,8 +2,14 @@
 obj = gradtool.o
 bin = gradtool
 
-CFLAGS = -std=c89 -pedantic -Wall -g
-LDFLAGS = -lglut -lGL
+CFLAGS = -pedantic -Wall -g
+LDFLAGS = $(libgl)
+
+ifeq ($(shell uname -s), Darwin)
+	libgl = -framework OpenGL -framework GLUT
+else
+	libgl = -lGL -lglut
+endif
 
 $(bin): $(obj)
 	$(CC) -o $@ $(obj) $(LDFLAGS)
@@ -15,7 +21,3 @@
 .PHONY: install
 install: $(bin)
 	cp $(bin) $(PREFIX)/bin/$(bin)
-
-.PHONY: uninstall
-uninstall:
-	rm -f $(PREFIX)/bin/$(bin)
diff -r 960cea2731c4 -r c438411b801b gradtool.c
--- a/gradtool.c	Tue Jun 19 05:30:45 2012 +0300
+++ b/gradtool.c	Fri Oct 09 01:45:12 2015 +0300
@@ -1,6 +1,12 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#ifdef __APPLE__
+#include <GLUT/glut.h>
+#else
 #include <GL/glut.h>
+#endif
 
 #define MAX_POS		512
 
@@ -23,7 +29,8 @@
 void rm_val(struct track *track, float pos);
 float get_val(struct track *track, float pos);
 
-void save(void);
+int save_ppm(const char *fname, int img_width);
+int save_grad(const char *fname);
 
 void key_handler(unsigned char key, int x, int y);
 void skey_handler(int key, int x, int y);
@@ -256,22 +263,20 @@
 }
 
 
-#define IMG_X	256
-#define FNAME	"grad.ppm"
-void save(void)
+int save_ppm(const char *fname, int img_width)
 {
 	int i;
 	FILE *fp;
 
-	if(!(fp = fopen(FNAME, "wb"))) {
-		perror("failed to write " FNAME);
-		return;
+	if(!(fp = fopen(fname, "wb"))) {
+		fprintf(stderr, "failed to write %s: %s\n", fname, strerror(errno));
+		return -1;
 	}
 
-	fprintf(fp, "P6\n%d %d\n255\n", IMG_X, 1);
+	fprintf(fp, "P6\n%d 1\n255\n", img_width);
 
-	for(i=0; i<IMG_X; i++) {
-		float t = (float)i / (float)IMG_X;
+	for(i=0; i<img_width; i++) {
+		float t = (float)i / (float)img_width;
 		int r = get_val(&tred, t) * 255.0;
 		int g = get_val(&tgreen, t) * 255.0;
 		int b = get_val(&tblue, t) * 255.0;
@@ -282,6 +287,37 @@
 	}
 
 	fclose(fp);
+	return 0;
+}
+
+int save_grad(const char *fname)
+{
+	int i;
+	FILE *fp;
+	struct track *tr[] = {&tred, &tgreen, &tblue};
+
+	if(!(fp = fopen(fname, "w"))) {
+		return -1;
+	}
+
+	fprintf(fp, "GRAD\n");
+
+	for(i=0; i<3; i++) {
+		key_t *ptr = tr[i]->keys->next;
+	
+		while(ptr) {
+			float t = (float)ptr->pos / (float)MAX_POS;
+			float r = get_val(&tred, t);
+			float g = get_val(&tgreen, t);
+			float b = get_val(&tblue, t);
+
+			fprintf(fp, "%f\t%f %f %f\n", t, r, g, b);
+			ptr = ptr->next;
+		}
+	}
+
+	fclose(fp);
+	return 0;
 }
 
 
@@ -298,7 +334,12 @@
 
 	case 's':
 	case 'S':
-		save();
+		save_ppm("grad.ppm", 256);
+		break;
+
+	case 'g':
+	case 'G':
+		save_grad("grad.grad");
 		break;
 
 	case 'c':