- add compression mode argument to imagepng

(MFH to 5.1?)

ext/gd/gd.c

@@ -1851,12 +1851,12 @@ PHP_FUNCTION(imagegif)
 #endif /* HAVE_GD_GIF_CREATE */
 
 #ifdef HAVE_GD_PNG
-/* {{{ proto bool imagepng(resource im [, string filename])
+/* {{{ proto bool imagepng(resource im [, string filename [, int quality]])
    Output PNG image to browser or file */
 PHP_FUNCTION(imagepng)
 {
 #ifdef USE_GD_IOCTX
-	_php_image_output_ctx(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_PNG, "PNG", gdImagePngCtx);
+	_php_image_output_ctx(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_PNG, "PNG", gdImagePngCtxEx);
 #else
 	_php_image_output(INTERNAL_FUNCTION_PARAM_PASSTHRU, PHP_GDIMG_TYPE_PNG, "PNG", gdImagePng);
 #endif

ext/gd/gd_ctx.c

@@ -80,7 +80,6 @@ static void _php_image_output_ctx(INTERNAL_FUNCTION_PARAMETERS, int image_type,
 			q = Z_LVAL_PP(quality);/* or colorindex for foreground of BW images (defaults to black) */
 		}
 	}
-
 	if ((argc == 2) || (argc > 2 && Z_STRLEN_PP(file))) {
 		if (!fn || php_check_open_basedir(fn TSRMLS_CC) || (PG(safe_mode) && !php_checkuid(fn, "rb+", CHECKUID_CHECK_FILE_AND_DIR))) {
 			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid filename '%s'", fn);
@@ -117,6 +116,7 @@ static void _php_image_output_ctx(INTERNAL_FUNCTION_PARAMETERS, int image_type,
 				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid threshold value '%d'. It must be between 0 and 255", q);
 			}
 		case PHP_GDIMG_TYPE_JPG:
+		case PHP_GDIMG_TYPE_PNG:
 			(*func_p)(im, ctx, q);
 			break;
 		case PHP_GDIMG_TYPE_XBM: