- Fixed issue #13253: Division by zero when trying to render stacked bars.

4 files changed, 36 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 9abcc0c..8061ba1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -5,7 +5,7 @@
 - Implemented feature #13102: Axes not extending beyond zero in line charts
 - Implemented feature #11981: Provide option for exact axis label renderer to
   put last value outside of the normal label boundings
-
+- Fixed issue #13253: Division by zero when trying to render stacked bars.
 
 1.3 - Monday 16 June 2008
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/src/charts/line.php b/src/charts/line.php
index 1c8613b..ed342e8 100644
--- a/src/charts/line.php
+++ b/src/charts/line.php
@@ -350,7 +350,8 @@ class ezcGraphLineChart extends ezcGraphChart
                         }
 
                         // Store stacked value for next iteration
-                        $stacked[(int) ( $point->x * 10000 )][$point->y / abs( $point->y )] = $point;
+                        $side = ( $point->y == 0 ? 1 : $point->y / abs( $point->y ) );
+                        $stacked[(int) ( $point->x * 10000 )][$side] = $point;
 
                         $renderer->drawStackedBar(
                             $boundings,
diff --git a/tests/data/compare/ezcGraphLineChartTest_testStackedBarChartBug13253.svg b/tests/data/compare/ezcGraphLineChartTest_testStackedBarChartBug13253.svg
new file mode 100644
index 0000000..a3b4c6a
--- /dev/null
+++ b/tests/data/compare/ezcGraphLineChartTest_testStackedBarChartBug13253.svg
@@ -0,0 +1,2 @@
+<?xml version="1.0"?>
+<svg xmlns="http://www.w3.org/2000/svg" width="500" height="200" version="1.0" id="ezcGraph"><defs/><g id="ezcGraphChart" color-rendering="optimizeQuality" shape-rendering="geometricPrecision" text-rendering="optimizeLegibility"><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 500.0000,0.0000 L 500.0000,200.0000 L 0.0000,200.0000 z " style="fill: #ffffff; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_1"/><path d=" M 0.0000,200.0000 L 0.0000,0.0000 L 100.0000,0.0000 L 100.0000,200.0000 L 0.0000,200.0000 z " style="fill: #000000; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_2"/><path d=" M 2.0000,16.0000 L 2.0000,2.0000 L 16.0000,2.0000 L 16.0000,16.0000 L 2.0000,16.0000 z " style="fill: #3465a4; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_3"/><path d=" M 2.0000,34.0000 L 2.0000,20.0000 L 16.0000,20.0000 L 16.0000,34.0000 L 2.0000,34.0000 z " style="fill: #4e9a06; fill-opacity: 1.00; stroke: none;" id="ezcGraphPolygon_5"/><path d=" M 100.0000,180.0000 L 500.0000,180.0000" style="fill: none; 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fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_98"/><text id="ezcGraphTextBox_26_text" x="129.3200" text-length="8.6800px" y="175.9000" style="font-size: 14px; font-family: 'sans-serif'; fill: #2e3436; fill-opacity: 1.00; stroke: none;">0</text></g><g id="ezcGraphTextBox_37"><path d=" M 120.1400,139.0000 L 120.1400,123.5000 L 139.0000,123.5000 L 139.0000,139.0000 L 120.1400,139.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_99"/><text id="ezcGraphTextBox_37_text" x="120.6400" text-length="17.3600px" y="135.9000" style="font-size: 14px; font-family: 'sans-serif'; fill: #2e3436; fill-opacity: 1.00; stroke: none;">25</text></g><g id="ezcGraphTextBox_48"><path d=" M 120.1400,99.0000 L 120.1400,83.5000 L 139.0000,83.5000 L 139.0000,99.0000 L 120.1400,99.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_100"/><text id="ezcGraphTextBox_48_text" x="120.6400" text-length="17.3600px" y="95.9000" style="font-size: 14px; font-family: 'sans-serif'; fill: #2e3436; fill-opacity: 1.00; stroke: none;">50</text></g><g id="ezcGraphTextBox_59"><path d=" M 120.1400,59.0000 L 120.1400,43.5000 L 139.0000,43.5000 L 139.0000,59.0000 L 120.1400,59.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_101"/><text id="ezcGraphTextBox_59_text" x="120.6400" text-length="17.3600px" y="55.9000" style="font-size: 14px; font-family: 'sans-serif'; fill: #2e3436; fill-opacity: 1.00; stroke: none;">75</text></g><g id="ezcGraphTextBox_70"><path d=" M 111.4600,37.0000 L 111.4600,21.5000 L 139.0000,21.5000 L 139.0000,37.0000 L 111.4600,37.0000 z " style="fill: #ffffff; fill-opacity: 0.00; stroke: none;" id="ezcGraphPolygon_102"/><text id="ezcGraphTextBox_70_text" x="111.9600" text-length="26.0400px" y="33.9000" style="font-size: 14px; font-family: 'sans-serif'; fill: #2e3436; fill-opacity: 1.00; stroke: none;">100</text></g></g></svg>
diff --git a/tests/line_test.php b/tests/line_test.php
index a895da3..72ae0b8 100644
--- a/tests/line_test.php
+++ b/tests/line_test.php
@@ -1198,5 +1198,36 @@ class ezcGraphLineChartTest extends ezcGraphTestCase
             $this->basePath . 'compare/' . __CLASS__ . '_' . __FUNCTION__ . '.svg'
         );
     }
+
+    public function testStackedBarChartBug13253()
+    {
+        $filename = $this->tempDir . __FUNCTION__ . '.svg';
+        $graph = new ezcGraphBarChart();
+
+        $graph->data['values']  = new ezcGraphArrayDataSet( array(
+            'string 1' => 55,
+            'string 2' => 25,
+            'string 3' => 10,
+            'string 4' => 10,
+            'string 5' => 5,
+        ) );
+        $graph->data['remains']  = new ezcGraphArrayDataSet( array(
+            'string 1' => 45,
+            'string 2' => 75,
+            'string 3' => 90,
+            'string 4' => 90,
+            'string 5' => 95,
+        ) );
+        
+        $graph->palette = new ezcGraphPaletteEzRed();
+        $graph->options->stackBars = true;
+
+        $graph->render( 500, 200, $filename );
+
+        $this->compare(
+            $filename,
+            $this->basePath . 'compare/' . __CLASS__ . '_' . __FUNCTION__ . '.svg'
+        );
+    }
 }
 ?>