--- parser3/src/classes/image.C	2002/11/25 14:57:32	1.82
+++ parser3/src/classes/image.C	2002/11/27 09:43:53	1.84
@@ -5,7 +5,7 @@
 	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
 */
 
-static const char* IDENT_IMAGE_C="$Date: 2002/11/25 14:57:32 $";
+static const char* IDENT_IMAGE_C="$Date: 2002/11/27 09:43:53 $";
 
 /*
 	jpegsize: gets the width and height (in pixels) of a jpeg file
@@ -212,7 +212,7 @@ inline uint endian_to_uint(bool is_big,
 static void measure_gif(Pool& pool, const String *origin_string, 
 			 Measure_reader& reader, ushort& width, ushort& height) {
 
-	void *buf;
+	const void *buf;
 	const int head_size=sizeof(GIF_Header);
 	if(reader.read(buf, head_size)<head_size)
 		throw Exception("image.format", 
@@ -456,7 +456,7 @@ static void measure_jpeg(Pool& pool, con
 	const uchar CODE_SIZE_D=0xC3;
 	const uchar CODE_EXIF=0xE1;
 
-	void *buf;
+	const void *buf;
 	const size_t prefix_size=2;
 	if(reader.read(buf, prefix_size)<prefix_size)
 		throw Exception("image.format", 
@@ -517,7 +517,7 @@ static void measure_jpeg(Pool& pool, con
 static void measure_png(Pool& pool, const String *origin_string, 
 			 Measure_reader& reader, ushort& width, ushort& height) {
 
-	void *buf;
+	const void *buf;
 	const int head_size=sizeof(PNG_Header);
 	if(reader.read(buf, head_size)<head_size)
 		throw Exception("image.format", 
@@ -976,6 +976,12 @@ static void _font(Request& r, const Stri
 		throw Exception("parser.runtime",
 			&method_name,
 			"alphabet must not be empty");
+
+	if(int remainder=image.SY() % alphabet.size())
+		throw Exception("parser.runtime",
+			&method_name,
+			"font-file height(%d) not divisable by alphabet size(%d), remainder=%d",
+				image.SY(), alphabet.size(), remainder);
 	
 	static_cast<VImage *>(r.get_self())->font=new(pool) Font(pool, 
 		alphabet,