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fixed bug #45829: HSSFPicture.getImageDimension() fails when DPI of image is zero 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@696622 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Yegor Kozlov 2008-09-18 10:28:24 +00:00
parent 159d3c265e
commit cf2c1b3c7e
3 changed files with 20 additions and 0 deletions
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6
src/java/org/apache/poi/hssf/usermodel/HSSFPicture.java
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@ -235,6 +235,12 @@ public class HSSFPicture
BufferedImage img = r.read(0);
int[] dpi = getResolution(r);
//if DPI is zero then assume standard 96 DPI
//since cannot divide by zero
if (dpi[0] == 0) dpi[0] = 96;
if (dpi[1] == 0) dpi[1] = 96;
size.width = img.getWidth()*96/dpi[0];
size.height = img.getHeight()*96/dpi[1];

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src/testcases/org/apache/poi/hssf/data/45829.png Executable file
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14
src/testcases/org/apache/poi/hssf/usermodel/TestHSSFPicture.java
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@ -47,4 +47,18 @@ public final class TestHSSFPicture extends TestCase{
assertEquals(848, anchor1.getDx2());
assertEquals(240, anchor1.getDy2());
}
/**
* Bug # 45829 reported ArithmeticException (/ by zero) when resizing png with zero DPI.
*/
public void test45829() {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sh1 = wb.createSheet();
HSSFPatriarch p1 = sh1.createDrawingPatriarch();
byte[] pictureData = HSSFTestDataSamples.getTestDataFileContent("45829.png");
int idx1 = wb.addPicture( pictureData, HSSFWorkbook.PICTURE_TYPE_PNG );
HSSFPicture pic = p1.createPicture(new HSSFClientAnchor(), idx1);
pic.resize();
}
}