From 96a67d1f67dfaa36795981dba4dedcccbb8d20de Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Witold=20Pi=C5=82at?= <witold.pilat@gmail.com>
Date: Tue, 1 Mar 2016 21:36:35 +0100
Subject: [PATCH] jk2fontdat.c: print jk2 .fontdat files in human-readable
 format

---
 jk2fontdat.c | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 jk2fontdat.c

diff --git a/jk2fontdat.c b/jk2fontdat.c
new file mode 100644
index 0000000..6a795c4
--- /dev/null
+++ b/jk2fontdat.c
@@ -0,0 +1,167 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <getopt.h>
+#include <ctype.h>
+
+#define GLYPH_COUNT 256
+
+typedef struct
+{
+	short		width;					// number of pixels wide - pitch
+	short		height;					// number of scan lines - height
+	short		horizAdvance;			// number of pixels to advance to the next char - xSkip
+	short		horizOffset;			// x offset into space to render glyph - ignored?
+	int			baseline;				// y offset - ignored?
+	float		s;						// x start tex coord
+	float		t;						// y start tex coord
+	float		s2;						// x end tex coord
+	float		t2;						// y end tex coord
+} glyphInfojk2_t;
+
+typedef struct dfontdat_s
+{
+	glyphInfojk2_t		mGlyphs[GLYPH_COUNT];
+
+	short			mPointSize;
+	short			mHeight;				// max height of font
+	short			mAscender;
+	short			mDescender;
+
+	short			mKoreanHack;
+} dfontdat_t;
+
+#define check_failure(ret, err, msg)		\
+	do {					\
+		if ((ret) == (err)) {		\
+			perror(msg);		\
+			exit(EXIT_FAILURE);	\
+		}				\
+	} while(0)
+
+// Globals
+
+dfontdat_t jk2font;
+const char *progName;
+
+// Procedures
+
+void PrintHelpExit()
+{
+	printf("  Usage: %s [-u] FILE\n", progName);
+	printf("Options:\n"
+	       "  -u replace lowercase glyph data with uppercase\n");
+	exit(EXIT_SUCCESS);
+}
+
+void LoadFontData(const char *file)
+{
+	FILE *fd;
+	int size;
+
+	if (file[0] == '\0') {
+		PrintHelpExit();
+	} else if (file[0] == '-' && file[1] == '\0') {
+		fd = stdin;
+	} else {
+		fd = fopen(file, "rb");
+		check_failure(fd, NULL, "Error opening file: ");
+		printf("File: %s\n\n", file);
+	}
+
+	// Little endian only
+	size = fread(&jk2font, 1, sizeof(jk2font), fd);
+
+	if (size < sizeof(jk2font)) {
+		printf("Font data too short.\n");
+		exit(EXIT_FAILURE);
+	} else if (size > sizeof(jk2font)) {
+		printf("Font data too long.\n");
+		exit(EXIT_FAILURE);
+	}
+}
+
+void ConvertToUppercase()
+{
+	printf("Replacing lowercase glyphs...\n");
+
+	for (int i = 'a'; i <= 'z'; i++) {
+		jk2font.mGlyphs[i] = jk2font.mGlyphs[i - 'a' + 'A'];
+	}
+	for (int i = 0xe0; i < 0xf6; i++) {
+		jk2font.mGlyphs[i] = jk2font.mGlyphs[i - 0xe0 + 0xc0];
+	}
+	for (int i = 0xf8; i < 0xfe; i++) {
+		jk2font.mGlyphs[i] = jk2font.mGlyphs[i - 0xf8 + 0xd8];
+	}
+
+	printf("Done\n");
+}
+
+void PrintFontData()
+{
+	glyphInfojk2_t *glyph;
+	short height, ascent, descent, offset, width, advance;
+
+	printf("Global parameters:\n\n");
+	printf("mPointSize: %d mHeight: %d mAscender: %d mDescender: %d mKoreanHack: %d\n\n",
+	       jk2font.mPointSize, jk2font.mHeight, jk2font.mAscender, jk2font.mDescender, jk2font.mKoreanHack);
+
+	printf("Glyph parameters:\n\n");
+
+	for (int i = 0; i < GLYPH_COUNT; i++) {
+		glyph = &jk2font.mGlyphs[i];
+
+		height = glyph->height;
+		ascent = glyph->baseline;
+		descent = height - glyph->baseline;
+		offset = glyph->horizOffset;
+		width = glyph->width;
+		advance = glyph->horizAdvance;
+
+		printf("0x%02x ", i);
+
+		if (isprint(i))
+			printf("'%c'", i);
+		else
+			printf("   ");
+
+		printf("   Height: %3d Ascent: %3d Descent: %3d         Offset: %3d Width: %3d Advance: %3d\n",
+		       height, ascent, descent, offset, width, advance );
+	}
+}
+
+#define FLAG_UPPERCASE 0x01
+
+int main (int argc, char *argv[])
+{
+	const char *file;
+	int opt;
+	int flags = 0;
+
+	progName = argv[0];
+
+	while ((opt = getopt(argc, argv, "u")) != -1) {
+		switch (opt) {
+		case 'u':
+			flags |= FLAG_UPPERCASE;
+			break;
+		case '?':
+			PrintHelpExit();
+		}
+	}
+
+	if (optind >= argc) {
+		PrintHelpExit();
+	}
+
+	file = argv[optind];
+	LoadFontData(file);
+
+	if (flags & FLAG_UPPERCASE) {
+		ConvertToUppercase();
+	} else {
+		PrintFontData();
+	}
+
+	return 0;
+}