Merge pull request #440 from cwalther/textrendering-fade

Fix shadowed text fading

Sources/Plasma/PubUtilLib/plGImage/plFont.cpp

@@ -1108,6 +1108,8 @@ void    plFont::IRenderChar8To32AlphaPremShadow( const plFont::plCharacter &c )
         xstart = -2;
 
     srcA = (uint8_t)(( fRenderInfo.fColor >> 24 ) & 0x000000ff);
+    if (srcA == 0)
+        return;
     srcR = (uint8_t)(( fRenderInfo.fColor >> 16 ) & 0x000000ff);
     srcG = (uint8_t)(( fRenderInfo.fColor >> 8  ) & 0x000000ff);
     srcB = (uint8_t)(( fRenderInfo.fColor       ) & 0x000000ff);
@@ -1149,7 +1151,10 @@ void    plFont::IRenderChar8To32AlphaPremShadow( const plFont::plCharacter &c )
                 sa = clamp;
             uint32_t a = IGetCharPixel(c, x, y);
             if (srcA != 0xff)
+            {
                 a = (srcA * a + 127) / 255;
+                sa = (srcA * sa + 127) / 255;
+            }
             uint32_t ta = a + sa - ((a*sa + 127) / 255);
             if (ta > (destPtr[ x ] >> 24))
                 destPtr[ x ] = ( ta << 24 ) | (((srcR * a + 127) / 255) << 16) |