From 9bc98749bde575f7e3a20cbc93403a3b17977e62 Mon Sep 17 00:00:00 2001
From: norad <norad@ffa7fe5e-494d-0410-b361-a75ebd5db220>
Date: Tue, 19 Apr 2011 11:21:51 +0000
Subject: [PATCH] Fix:graphics/sdl:Move ft_buffer into graphics_priv. Prevents
 multiple g_free calls on the same buffer.

git-svn-id: https://navit.svn.sourceforge.net/svnroot/navit/trunk@4439 ffa7fe5e-494d-0410-b361-a75ebd5db220
---
 navit/navit/graphics/sdl/graphics_sdl.c | 40 ++++++++++++++++++---------------
 1 file changed, 22 insertions(+), 18 deletions(-)

diff --git a/navit/navit/graphics/sdl/graphics_sdl.c b/navit/navit/graphics/sdl/graphics_sdl.c
index 72164fd..1c4bcd3 100644
--- a/navit/navit/graphics/sdl/graphics_sdl.c
+++ b/navit/navit/graphics/sdl/graphics_sdl.c
@@ -158,6 +158,8 @@ struct graphics_priv {
 #endif
   struct font_freetype_methods freetype_methods;
     /* </main> */
+  unsigned char * ft_buffer;
+  unsigned int    ft_buffer_size;
 };
 
 static int dummy;
@@ -226,8 +228,6 @@ static unsigned int sdl_orientation_count = 2^16;
 static char sdl_next_orientation = WEBOS_ORIENTATION_PORTRAIT;
 # endif
 #endif
-static unsigned char * ft_buffer = NULL;
-static unsigned int    ft_buffer_size = 0;
 
 struct graphics_font_priv {
 #ifdef SDL_TTF
@@ -264,7 +264,10 @@ graphics_destroy(struct graphics_priv *gr)
 {
     dbg(0, "graphics_destroy %p %u\n", gr, gr->overlay_mode);
 
-    g_free (ft_buffer);
+    if (gr->ft_buffer) {
+	g_free (gr->ft_buffer);
+	gr->ft_buffer = NULL;
+    }
 
     if(gr->overlay_mode)
     {
@@ -954,13 +957,14 @@ set_pixel(SDL_Surface *surface, int x, int y, Uint8 r2, Uint8 g2, Uint8 b2, Uint
 
 
 static void
-resize_ft_buffer (unsigned int new_size)
+resize_ft_buffer (struct graphics_priv *gr, unsigned int new_size)
 {
-    if (new_size > ft_buffer_size) {
-	g_free (ft_buffer);
-	ft_buffer = g_malloc (new_size);
-	dbg(1, "old_size(%i) new_size(%i) ft_buffer(%i)\n", ft_buffer_size, new_size, ft_buffer);
-	ft_buffer_size = new_size;
+    if (new_size > gr->ft_buffer_size) {
+	if (gr->ft_buffer)
+	    g_free (gr->ft_buffer);
+	gr->ft_buffer = g_malloc (new_size);
+	dbg(1, "old_size(%i) new_size(%i) ft_buffer(%i)\n", gr->ft_buffer_size, new_size, gr->ft_buffer);
+	gr->ft_buffer_size = new_size;
     }
 }
 
@@ -1021,11 +1025,11 @@ display_text_draw(struct font_freetype_text *text,
 	if (g->w && g->h && bg) {
 	    stride = (g->w + 2) * 4;
 	    if (color) {
-		resize_ft_buffer(stride * (g->h + 2));
-		gr->freetype_methods.get_shadow(g, ft_buffer, 32, stride, &white, &transparent);
+		resize_ft_buffer(gr, stride * (g->h + 2));
+		gr->freetype_methods.get_shadow(g, gr->ft_buffer, 32, stride, &white, &transparent);
 
 		SDL_Surface *glyph_surface =
-		    SDL_CreateRGBSurfaceFrom(ft_buffer, g->w + 2, g->h + 2,
+		    SDL_CreateRGBSurfaceFrom(gr->ft_buffer, g->w + 2, g->h + 2,
 					     32,
 					     stride,
 					     0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
@@ -1055,12 +1059,12 @@ display_text_draw(struct font_freetype_text *text,
 	    if (color) {
 		stride = g->w;
 		if (bg) {
-		    resize_ft_buffer(stride * g->h * 4);
-		    gr->freetype_methods.get_glyph(g, ft_buffer, 32,
+		    resize_ft_buffer(gr, stride * g->h * 4);
+		    gr->freetype_methods.get_glyph(g, gr->ft_buffer, 32,
 						   stride * 4, &black,
 						   &white, &transparent);
 		    SDL_Surface *glyph_surface =
-			SDL_CreateRGBSurfaceFrom(ft_buffer, g->w, g->h, 32,
+			SDL_CreateRGBSurfaceFrom(gr->ft_buffer, g->w, g->h, 32,
 						 stride * 4,
 						 0x000000ff,0x0000ff00, 0x00ff0000,0xff000000);
 		    if (glyph_surface) {
@@ -1075,12 +1079,12 @@ display_text_draw(struct font_freetype_text *text,
 		    }
 		}
 		stride *= 4;
-		resize_ft_buffer(stride * g->h);
-		gr->freetype_methods.get_glyph(g, ft_buffer, 32, stride,
+		resize_ft_buffer(gr, stride * g->h);
+		gr->freetype_methods.get_glyph(g, gr->ft_buffer, 32, stride,
 					       &black, &white,
 					       &transparent);
 		int ii, jj;
-		unsigned char* pGlyph = ft_buffer;
+		unsigned char* pGlyph = gr->ft_buffer;
 		for (jj = 0; jj < g->h; ++jj) {
 		    for (ii = 0; ii < g->w; ++ii) {
 			if(*(pGlyph+3) > 0) {
-- 
2.7.4