From 481ce3d39d8072d20b425dba928efe4cff522db9 Mon Sep 17 00:00:00 2001
From: raysan5 <raysan5@gmail.com>
Date: Mon, 21 Nov 2016 19:47:58 +0100
Subject: [PATCH] Corrected bug with alpha mask on font

Mask was wrongly applied to 8-bit font image, it generated dark borders
on the font. Grayscale image has to be considered as the alpha mask for
a completely white image to use it correctly.
---
 src/text.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/text.c b/src/text.c
index d752f1cbd..c394889ec 100644
--- a/src/text.c
+++ b/src/text.c
@@ -875,10 +875,18 @@ static SpriteFont LoadBMFont(const char *fileName)
     TraceLog(DEBUG, "[%s] Font texture loading path: %s", fileName, texPath);
     
     Image imFont = LoadImage(texPath);
+    
+    if (imFont.format == UNCOMPRESSED_GRAYSCALE) 
+    {
+        Image imCopy = ImageCopy(imFont);
+        
+        for (int i = 0; i < imCopy.width*imCopy.height; i++) ((unsigned char *)imCopy.data)[i] = 0xff;  // WHITE pixel
 
-    if (imFont.format == UNCOMPRESSED_GRAYSCALE) ImageAlphaMask(&imFont, imFont);
-
-    font.texture = LoadTextureFromImage(imFont);
+        ImageAlphaMask(&imCopy, imFont);
+        font.texture = LoadTextureFromImage(imCopy);
+        UnloadImage(imCopy);
+    }
+    else font.texture = LoadTextureFromImage(imFont);
     
     font.size = fontSize;
     font.numChars = numChars;