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authorPeter Wu <lekensteyn@gmail.com>2012-09-30 15:35:54 +0200
committerPeter Wu <lekensteyn@gmail.com>2012-09-30 15:35:54 +0200
commit41bf4f1ced8b8357c0c3f1c482afece9e37ee77a (patch)
tree07d57e65a0d61de2fb137407716d5e35513b110b
parent6471c48ac37c53d99e50a966064f889af8aaaf6f (diff)
downloadc-files-41bf4f1ced8b8357c0c3f1c482afece9e37ee77a.tar.gz
makexpm: generate XPM file from width, height, ncolors and cpp
-rw-r--r--makexpm.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/makexpm.c b/makexpm.c
new file mode 100644
index 0000000..262ba84
--- /dev/null
+++ b/makexpm.c
@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+/* chars to use for colors */
+static const char p[] = "0123456789"
+"abcdefghijklmnopqrstuvwxyz"
+"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+"!@#$%^&*()_+-=`~[]{}|;:',<.>/? ";
+/* number of chars excl NIL */
+static const int q = sizeof(p) - 1;
+
+int main(int argc, char **argv) {
+ unsigned int width, height, ncolors, cpp, i, j;
+ if (argc != 5) {
+ fprintf(stderr, "Usage: %s width height ncolors cpp\n", argv[0]);
+ return 1;
+ }
+ /*
+ width = 1600;
+ height = 900;
+ ncolors = width * height / 1024;
+ cpp = 3;
+ */
+
+ width = strtoul(argv[1], NULL, 0);
+ height= strtoul(argv[2], NULL, 0);
+ ncolors=strtoul(argv[3], NULL, 0);
+ cpp = strtoul(argv[4], NULL, 0);
+
+ printf(
+ "/* XPM */\n"
+ "static char *picture[] = {\n"
+ "/* columns rows colors chars-per-pixel */\n"
+ "\"%d %d %d %d \",\n"
+ , width, height, ncolors, cpp);
+
+
+ const char *fmt;
+ switch (cpp) {
+ case 1: fmt = "%c"; break;
+ case 2: fmt = "%c%c"; break;
+ case 3: fmt = "%c%c%c"; break;
+ default:fmt = "%c%c%c%c"; break;
+ }
+ for (i = 0; i<ncolors; ++i) {
+ putchar('"');
+ printf(fmt, p[i%q], p[i/q%q], p[i/q/q%q], p[i/q/q/q%q]);
+ printf(" c #%06x\",\n", 256 * 256 * 256 * i / ncolors);
+ }
+
+ puts("/* pixels */");
+ for (i = 0; i<height; ++i) {
+ putchar('"');
+ for (j = 0; j<width; ++j) {
+ unsigned int n = (i * width + j) % ncolors;
+ printf(fmt, p[n%q], p[n/q%q], p[n/q/q%q], p[n/q/q/q%q]);
+ }
+ if (i < height - 1) puts("\",");
+ else puts("\"");
+ }
+ puts("};");
+ return 0;
+}