Switch to libgd anti-aliased drawing API

Instead of rolling our own in the bundled libgd, we use libgd's anti-aliased
drawing API. This way imageantialias() is also available, when built against
a system libgd.

2 files changed, 2 insertions, 18 deletions

diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 3e742561a6..5c3593ed1b 100644
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -2608,24 +2608,17 @@ void gdImagePolygon (gdImagePtr im, gdPointPtr p, int n, int c)
 {
 	int i;
 	int lx, ly;
-	typedef void (*image_line)(gdImagePtr im, int x1, int y1, int x2, int y2, int color);
-	image_line draw_line;
 
 	if (n <= 0) {
 		return;
 	}
 
-	if ( im->antialias) {
-		draw_line = gdImageAALine;
-	} else {
-		draw_line = gdImageLine;
-	}
 	lx = p->x;
 	ly = p->y;
-	draw_line(im, lx, ly, p[n - 1].x, p[n - 1].y, c);
+	gdImageLine(im, lx, ly, p[n - 1].x, p[n - 1].y, c);
 	for (i = 1; i < n; i++) {
 		p++;
-		draw_line(im, lx, ly, p->x, p->y, c);
+		gdImageLine(im, lx, ly, p->x, p->y, c);
 		lx = p->x;
 		ly = p->y;
 	}
@@ -2953,13 +2946,6 @@ void gdImageAlphaBlending (gdImagePtr im, int alphaBlendingArg)
 	im->alphaBlendingFlag = alphaBlendingArg;
 }
 
-void gdImageAntialias (gdImagePtr im, int antialias)
-{
-	if (im->trueColor){
-		im->antialias = antialias;
-	}
-}
-
 void gdImageSaveAlpha (gdImagePtr im, int saveAlphaArg)
 {
 	im->saveAlphaFlag = saveAlphaArg;
diff --git a/ext/gd/libgd/gd.h b/ext/gd/libgd/gd.h
index b56afd1a47..12832ded34 100644
--- a/ext/gd/libgd/gd.h
+++ b/ext/gd/libgd/gd.h
@@ -222,8 +222,6 @@ typedef struct gdImageStruct {
 		To do that, build your image as a truecolor image,
 		then quantize down to 8 bits. */
 	int alphaBlendingFlag;
-	/* Should antialias functions be used */
-	int antialias;
 	/* Should the alpha channel of the image be saved? This affects
 		PNG at the moment; other future formats may also
 		have that capability. JPEG doesn't. */