(gd_render): Use gdImageColorResolveAlpha only if

HAVE_GD is 2 or the greater.

diff --git a/src/m17n-gd.c b/src/m17n-gd.c
index 97a5351..a2f2409 100644 (file)
--- a/src/m17n-gd.c
+++ b/src/m17n-gd.c
@@ -327,10 +327,28 @@ gd_render (MDrawWindow win, int x, int y,
              if (bmp[j] > 0)
                {
                  int pixel1 = pixel;
+#if HAVE_GD > 1
                  int alpha = gdAlphaTransparent * (255 - bmp[j]) / 255;
 
                  if (alpha > 0)
                    pixel1 = gdImageColorResolveAlpha (img, r, g, b, alpha);
+#else
+                 int f = bmp[j] >> 5;
+
+                 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);
+                   }
+#endif
                  gdImageSetPixel (img, xoff, yoff, pixel1);
                }
          }