From 575b140a57e2bb86f05b8d18f01a9f2cea1f5034 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Fri, 21 Apr 2017 18:53:18 +0200
Subject: more glitch art :)

---
 src/lib/include/kogata/draw.h |  3 ++-
 src/lib/libkogata/draw.c      | 20 +++++++++++++++-----
 2 files changed, 17 insertions(+), 6 deletions(-)

(limited to 'src/lib')

diff --git a/src/lib/include/kogata/draw.h b/src/lib/include/kogata/draw.h
index d00036f..d8a2e13 100644
--- a/src/lib/include/kogata/draw.h
+++ b/src/lib/include/kogata/draw.h
@@ -57,7 +57,8 @@ void g_scroll_up(fb_t *fb, int l);
 //  ---- Text manipulation
 
 font_t *g_load_font(const char* fontname);
-void g_free_font(font_t *f);
+void g_incref_font(font_t *f);
+void g_decref_font(font_t *f);
 
 int g_text_width(font_t *f, const char* text);
 int g_text_height(font_t *f, const char* text);
diff --git a/src/lib/libkogata/draw.c b/src/lib/libkogata/draw.c
index d9a4268..29cae31 100644
--- a/src/lib/libkogata/draw.c
+++ b/src/lib/libkogata/draw.c
@@ -244,6 +244,7 @@ typedef struct font {
 			uint32_t nchars;
 		} ascii_bitmap;
 	};
+	int nrefs;
 } font_t;
 
 font_t *g_load_ascii_bitmap_font(fd_t f) {
@@ -272,6 +273,8 @@ font_t *g_load_ascii_bitmap_font(fd_t f) {
 	size_t rd = sc_read(f, sizeof(h), h.ch * h.nchars, (char*)font->ascii_bitmap.data);
 	if (rd != h.ch * h.nchars) goto error;
 
+	font->nrefs = 1;
+
 	return font;
 
 error:
@@ -291,12 +294,19 @@ font_t *g_load_font(const char* fontname) {
 	return 0;
 }
 
-void g_free_font(font_t *f) {
-	if (f->type == FONT_ASCII_BITMAP) {
-		free(f->ascii_bitmap.data);
-	}
+void g_incref_font(font_t *f) {
+	f->nrefs++;
+}
 
-	free(f);
+void g_decref_font(font_t *f) {
+	f->nrefs--;
+
+	if (f->nrefs == 0) {
+		if (f->type == FONT_ASCII_BITMAP) {
+			free(f->ascii_bitmap.data);
+		}
+		free(f);
+	}
 }
 
 int g_text_width(font_t *font, const char* text) {
-- 
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