[PDFBOX-4657] Use smooth interpolation for stencils too

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.17
• Fix Version/s: 2.0.18, 3.0.0 PDFBox
• Component/s: Rendering
• Labels: interpolation pattern
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 22/Sep/19 15:20
• Updated: 23/Dec/19 22:16
• Resolved: 22/Sep/19 15:26

Description

This came up with the PDF in PDFBOX-4627... the pattern was invisible. This is because interpolation is currently disabled for all stencils. This invisibility problem is solved by using the rendering hints when a stencil is downscaled. Currently we don't, due to a past problem with the file survey.pdf (PDFBOX-1094). However this problem no longer occurs, likely due to other changes in the last 5 years.

Issue Links

• relates to: PDFBOX-4627 Wrong color of uncolored tiling pattern
• relates to: PDFBOX-1094 Pattern colorspace support