1 files changed, 157 insertions, 0 deletions
diff --git a/icon/img2data.c b/icon/img2data.c
new file mode 100644
index 0000000..2223bf0
--- /dev/null
+++ b/icon/img2data.c
@@ -0,0 +1,157 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <Imlib2.h>
+
+/* macros */
+#define ARRLEN(a) (sizeof(a) / sizeof((a)[0]))
+
+/* globals */
+static unsigned long palette[16] = {0};
+static unsigned int palette_size = 0;
+static unsigned int run_column = 0;
+static unsigned int icon_sizes[16] = {0};
+static unsigned int icon_sizes_size = 0;
+
+/* functions */
+static void error(int eval, int err, const char *fmt, ...)
+{
+	va_list ap;
+
+	fflush(stdout);
+	va_start(ap, fmt);
+	if (fmt)
+		vfprintf(stderr, fmt, ap);
+	va_end(ap);
+	if (err)
+		fprintf(stderr, "%s%s", fmt ? ": " : "", strerror(err));
+	fputc('\n', stderr);
+
+	if (eval)
+		exit(eval);
+}
+
+static unsigned long color_to_ulong(Imlib_Color color)
+{
+	return (color.alpha << 24 & 0xff000000) |
+		(color.red   << 16 & 0x00ff0000) |
+		(color.green <<  8 & 0x0000ff00) |
+		(color.blue        & 0x000000ff);
+}
+
+static int to_palette(unsigned long color)
+{
+	unsigned int i;
+
+	for (i = 0; i < palette_size; i++) {
+		if (palette[i] == color)
+			return i;
+	}
+	if (palette_size + 1 == 16)
+		error(EXIT_FAILURE, 0, "Error: More than 16 colors in palette");
+	palette[palette_size] = color;
+
+	return palette_size++;
+}
+
+static void print_run(int color, unsigned int run_length)
+{
+	while (run_length > 0) {
+		int x = run_length / 16 >= 1 ? 16 : run_length;
+
+		printf("0x%02x, ", (x - 1) << 4 | color);
+		run_length -= x;
+		if (++run_column % 12 == 0)
+			printf("\n\t");
+	}
+}
+
+static void print_palette(void)
+{
+	unsigned int i;
+
+	printf("static const unsigned long icon_colors[] = {\n\t");
+	for (i = 0; i < palette_size; i++) {
+		printf("0x%08lx, ", palette[i]);
+		if (i % 4 == 3)
+			printf("\n\t");
+	}
+	printf("\n};\n\n");
+}
+
+static void print_icon_array(void)
+{
+	unsigned int i;
+
+	printf("static const icon_data_t icons[] = {\n");
+	for (i = 0; i < icon_sizes_size; i++)
+		printf("\tICON_(%d),\n", icon_sizes[i]);
+	printf("};\n\n");
+}
+
+static unsigned int print_encoded_image(const char *path)
+{
+	Imlib_Image image;
+	Imlib_Color color;
+	unsigned int width, height, x, y;
+	unsigned int run_length = 1;
+	int currentcolor = 0;
+	int lastcolor = -1;
+
+	image = imlib_load_image(path);
+
+	if (image == NULL)
+		error(EXIT_FAILURE, 0, "Error loading image: %s", path);
+
+	imlib_context_set_image(image);
+
+	width = imlib_image_get_width();
+	height = imlib_image_get_height();
+
+	if (width != height)
+		error(EXIT_FAILURE, 0, "Image is not square: %s", path);
+
+	printf("static const unsigned char icon_data_%d[] = {\n\t", width);
+	for (y = 0; y < height; y++) {
+		for (x = 0; x < width; x++) {
+			imlib_image_query_pixel(x, y, &color);
+			currentcolor = to_palette(color_to_ulong(color));
+			if (currentcolor != lastcolor) {
+				if (lastcolor != -1)
+					print_run(lastcolor, run_length);
+				run_length = 1;
+			} else {
+				run_length++;
+			}
+			lastcolor = currentcolor;
+		}
+	}
+	print_run(lastcolor, run_length);
+	printf("\n};\n\n");
+
+	imlib_free_image();
+
+	return width;
+}
+
+int main(int argc, char **argv)
+{
+	unsigned int img_size = 0;
+	unsigned int i;
+
+	if (argc < 2)
+		error(EXIT_FAILURE, 0, "No icons provided");
+	else if (argc-1 > ARRLEN(icon_sizes))
+		error(EXIT_FAILURE, 0, "Too many icons");
+
+	for (i = 1; i < argc; i++) {
+		img_size = print_encoded_image(argv[i]);
+		run_column = 0;
+		icon_sizes[icon_sizes_size++] = img_size;
+	}
+	print_palette();
+	print_icon_array();
+
+	return EXIT_SUCCESS;
+}