Prepare a font system

src/font.c

@@ -0,0 +1,76 @@
+// SONIC ROBO BLAST 2
+//-----------------------------------------------------------------------------
+// Copyright (C) 1999-2018 by Sonic Team Junior.
+// Copyright (C)      2019 by Kart Krew.
+//
+// This program is free software distributed under the
+// terms of the GNU General Public License, version 2.
+// See the 'LICENSE' file for more details.
+//-----------------------------------------------------------------------------
+/// \file  font.c
+/// \brief Font setup
+
+#include "doomdef.h"
+#include "hu_stuff.h"
+#include "font.h"
+
+font_t       fontv[MAX_FONTS];
+int          fontc;
+
+static void
+FontCache (font_t *fnt)
+{
+	int i;
+	int c;
+
+	c = fnt->start;
+	for (i = 0; i < fnt->size; ++i, ++c)
+	{
+		fnt->font[i] = HU_CachePatch(
+				"%s%.*d",
+				fnt->digits,
+				fnt->prefix,
+				c);
+	}
+}
+
+void
+Font_Load (void)
+{
+	int i;
+	for (i = 0; i < fontc; ++i)
+	{
+		FontCache(&fontv[i]);
+	}
+}
+
+int
+Font_DumbRegister (const font_t *sfnt)
+{
+	font_t *fnt;
+
+	if (fontc == MAX_FONTS)
+		return -1;
+
+	fnt = &fontv[fontc];
+
+	if (!( fnt->font = ZZ_Alloc(sfnt->size * sizeof (patch_t *)) ))
+		return -1;
+
+	memcpy(fnt, sfnt, sizeof (font_t));
+
+	return fontc++;
+}
+
+int
+Font_Register (const font_t *sfnt)
+{
+	int d;
+
+	d = Font_DumbRegister(sfnt);
+
+	if (d >= 0)
+		FontCache(&fontv[d]);
+
+	return d;
+}

src/font.h

@@ -0,0 +1,49 @@
+// SONIC ROBO BLAST 2
+//-----------------------------------------------------------------------------
+// Copyright (C) 1999-2018 by Sonic Team Junior.
+// Copyright (C)      2019 by Kart Krew.
+//
+// This program is free software distributed under the
+// terms of the GNU General Public License, version 2.
+// See the 'LICENSE' file for more details.
+//-----------------------------------------------------------------------------
+/// \file  font.h
+/// \brief Font setup
+
+#ifndef __FONT_H_
+#define __FONT_H__
+
+#define MAX_FONTS 32
+
+typedef struct font font_t;
+
+struct font
+{
+	patch_t **font;
+
+	UINT8     start;
+	UINT8     size;
+
+	char      prefix[8];/* 7 used at most */
+	unsigned  digits : 2;
+};
+
+extern font_t fontv[MAX_FONTS];
+extern int    fontc;
+
+/*
+Reloads already registered fonts.
+*/
+void Font_Load (void);
+
+/*
+Registers and loads a new font.
+*/
+int Font_Register     (const font_t *);
+
+/*
+Register a new font, but do not load it yet.
+*/
+int Font_DumbRegister (const font_t *);
+
+#endif