Initial commit

channel/channelapp/banner/twintig.c

@@ -0,0 +1,103 @@
+// Copyright 2007,2008  Segher Boessenkool  <segher@kernel.crashing.org>
+// Licensed under the terms of the GNU GPL, version 2
+// http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define ERROR(s) do { fprintf(stderr, s "\n"); exit(1); } while (0)
+
+// basic data types
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+void wbe16(u8 *p, u16 x) {
+	p[0] = x >> 8;
+	p[1] = x;
+}
+
+void wbe32(u8 *p, u32 x) {
+	wbe16(p, x >> 16);
+	wbe16(p + 2, x);
+}
+
+static int read_image(u8 *data, u32 w, u32 h, const char *name) {
+	FILE *fp;
+	u32 x, y;
+	u32 ww, hh;
+
+	fp = fopen(name, "rb");
+	if (!fp)
+		return -1;
+
+	if (fscanf(fp, "P6 %d %d 255\n", &ww, &hh) != 2)
+		ERROR("bad ppm");
+	if (ww != w || hh != h)
+		ERROR("wrong size ppm");
+
+	for (y = 0; y < h; y++)
+		for (x = 0; x < w; x++) {
+			u8 pix[3];
+			u16 raw;
+			u32 x0, x1, y0, y1, off;
+
+			x0 = x & 3;
+			x1 = x >> 2;
+			y0 = y & 3;
+			y1 = y >> 2;
+			off = x0 + 4 * y0 + 16 * x1 + 4 * w * y1;
+
+			if (fread(pix, 3, 1, fp) != 1)
+				ERROR("read");
+
+			raw = (pix[0] & 0xf8) << 7;
+			raw |= (pix[1] & 0xf8) << 2;
+			raw |= (pix[2] & 0xf8) >> 3;
+			raw |= 0x8000;
+
+			wbe16(data + 2*off, raw);
+		}
+
+	fclose(fp);
+	return 0;
+}
+
+int main(int argc, char **argv) {
+	FILE *in, *fp;
+	u8 header[0x72a0];
+
+	fp = fopen("banner.bin", "wb+");
+	if (!fp)
+		ERROR("open banner.bin");
+
+	memset(header, 0, sizeof header);
+
+	memcpy(header, "WIBN", 4);
+	header[9] = 2; // wtf
+
+	in = fopen("title", "rb");
+	if (!in)
+		ERROR("open title");
+	if (fread(header + 0x20, 0x80, 1, in) != 1)
+		ERROR("read title");
+	fclose(in);
+
+	if(read_image(header + 0xa0, 192, 64, "banner.ppm"))
+		ERROR("open banner.ppm"); 
+
+	if(read_image(header + 0x60a0, 48, 48, "icon.ppm"))
+		ERROR("open icon.ppm"); 
+
+	if (fwrite(header, 0x72a0, 1, fp) != 1)
+		ERROR("write header");
+
+	fclose(fp);
+
+	return 0;
+}