(gd_render): Use gdImageColorResolveAlpha instead of

simulating anti-aliasing.

diff --git a/src/m17n-gd.c b/src/m17n-gd.c
index 981ccf5..97a5351 100644 (file)
--- a/src/m17n-gd.c
+++ b/src/m17n-gd.c
@@ -324,24 +324,13 @@ gd_render (MDrawWindow win, int x, int y,
          {
            xoff = x + ft_face->glyph->bitmap_left + from->xoff;
            for (j = 0; j < width; j++, xoff++)
-             if (bmp[j])
+             if (bmp[j] > 0)
                {
-                 int f = bmp[j] >> 5;
                  int pixel1 = pixel;
+                 int alpha = gdAlphaTransparent * (255 - bmp[j]) / 255;
 
-                 if (f < 7)
-                   {
-                     int r1, g1, b1, color1;
-
-                     pixel1 = gdImageGetPixel (img, xoff, yoff);
-                     r1 = gdImageRed (img, pixel1);
-                     g1 = gdImageGreen (img, pixel1);
-                     b1 = gdImageBlue (img, pixel1);
-                     color1 = ((((r * f + r1 * (7 - f)) / 7) << 16)
-                               | (((g * f + g1 * (7 - f)) / 7) << 8)
-                               | ((b * f + b1 * (7 - f)) / 7));
-                     pixel1 = RESOLVE_COLOR (img, color1);
-                   }
+                 if (alpha > 0)
+                   pixel1 = gdImageColorResolveAlpha (img, r, g, b, alpha);
                  gdImageSetPixel (img, xoff, yoff, pixel1);
                }
          }