From f859945e062d35a431ed1c3e934db15bf391b3e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20Ka=CC=88fer?= <mail@kkaefer.com>
Date: Tue, 15 Apr 2014 13:22:32 -0400
Subject: [PATCH] fix clipping

---
 src/renderer/painter.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/renderer/painter.cpp b/src/renderer/painter.cpp
index fb2cd0e34..71b1e362a 100644
--- a/src/renderer/painter.cpp
+++ b/src/renderer/painter.cpp
@@ -130,7 +130,7 @@ void Painter::drawClippingMask(const mat4& matrix, uint8_t clip_id) {
     plainShader->setColor(style.computed.background.color);
     plainShader->setOpacity(style.computed.background.opacity);
 
-    glStencilFunc(GL_ALWAYS, 1, 0xFF);
+    glStencilFunc(GL_ALWAYS, clip_id, 0xFF);
     glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index());
 }
 
@@ -161,6 +161,7 @@ void Painter::render(const Tile& tile) {
     frameHistory.record(transform.getNormalizedZoom());
 
     matrix = tile.matrix;
+    glStencilFunc(GL_EQUAL, tile.clip_id, 0xFF);
 
     renderLayers(tile.data, style.layers);