[PDFBOX-2111] Cast error in Gouraud shadings

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.5, 1.8.6, 2.0.0
• Fix Version/s: 1.8.6, 2.0.0
• Component/s: Rendering
• Labels: shading shadingpattern
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 03/Jun/14 15:14
• Updated: 22/Jun/14 14:34
• Resolved: 03/Jun/14 16:06

Description

There's a bug in Type4ShadingContext and Type5ShadingContext:

        long maxSrcCoord = (int) Math.pow(2, bitsPerCoordinate) - 1;
        long maxSrcColor = (int) Math.pow(2, bitsPerColorComponent) - 1;

should be

        long maxSrcCoord = (long) (Math.pow(2, bitsPerCoordinate) - 1);
        long maxSrcColor = (long) (Math.pow(2, bitsPerColorComponent) - 1);

The problem is that maxSrcCoord is 7FFFFFFF instead of FFFFFFFF when bitsPerCoordinate is 32.