From b8637a900e0d85edf7eeacc7898995740fedb313 Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Mon, 15 Apr 2013 18:04:27 +0100
Subject: [PATCH] + fix crop width/height calc

---
 src/webp_reader.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/webp_reader.cpp b/src/webp_reader.cpp
index 52941fd2c..1b0ffe6f3 100644
--- a/src/webp_reader.cpp
+++ b/src/webp_reader.cpp
@@ -129,8 +129,8 @@ void webp_reader::read(unsigned x0, unsigned y0,image_data_32& image)
     config.options.use_cropping = 1;
     config.options.crop_left = x0;
     config.options.crop_top = y0;
-    config.options.crop_width = image.width();
-    config.options.crop_height = image.height();
+    config.options.crop_width = std::min(width_ - x0, image.width());
+    config.options.crop_height = std::min(height_ - y0, image.height());
 
     if (WebPGetFeatures(data_, size_, &config.input) != VP8_STATUS_OK)
     {