Implement FAST_ZPP support for imagecolorat() and imagesetpixel()

These functions may be used in tight loops to do image manipulation in
userland. Using FAST_ZPP is supposed to bring considerable performance
improvements in this case; we've been able to measure up to 25%.

Author: cmb69

ext/gd/gd.c

@@ -2805,9 +2805,17 @@ PHP_FUNCTION(imagecolorat)
 	zend_long x, y;
 	gdImagePtr im;
 
+#ifndef FAST_ZPP
 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "rll", &IM, &x, &y) == FAILURE) {
 		return;
 	}
+#else
+	ZEND_PARSE_PARAMETERS_START(3, 3)
+		Z_PARAM_RESOURCE(IM)
+		Z_PARAM_LONG(x)
+		Z_PARAM_LONG(y)
+	ZEND_PARSE_PARAMETERS_END();
+#endif
 
 	if ((im = (gdImagePtr)zend_fetch_resource(Z_RES_P(IM), "Image", le_gd)) == NULL) {
 		RETURN_FALSE;
@@ -3067,9 +3075,18 @@ PHP_FUNCTION(imagesetpixel)
 	zend_long x, y, col;
 	gdImagePtr im;
 
+#ifndef FAST_ZPP
 	if (zend_parse_parameters(ZEND_NUM_ARGS(), "rlll", &IM, &x, &y, &col) == FAILURE) {
 		return;
 	}
+#else
+	ZEND_PARSE_PARAMETERS_START(4, 4)
+		Z_PARAM_RESOURCE(IM)
+		Z_PARAM_LONG(x)
+		Z_PARAM_LONG(y)
+		Z_PARAM_LONG(col)
+	ZEND_PARSE_PARAMETERS_END();
+#endif
 
 	if ((im = (gdImagePtr)zend_fetch_resource(Z_RES_P(IM), "Image", le_gd)) == NULL) {
 		RETURN_FALSE;