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Posted to dev@pdfbox.apache.org by "John Hewson (JIRA)" <ji...@apache.org> on 2016/04/07 18:28:25 UTC
[jira] [Commented] (PDFBOX-3305) PDPageContentStream should allow
drawing images at current position
[ https://issues.apache.org/jira/browse/PDFBOX-3305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15230501#comment-15230501 ]
John Hewson commented on PDFBOX-3305:
-------------------------------------
{quote}
This is needed because otherwise there is no other way of setting a transform matrix manually which might have skew/rotation in addition to scaling/translation.
{quote}
Not so. Matrixes are concatenated, not replaced, so just apply the transform you want before drawing the image. Then restore the graphics state afterwards.
> PDPageContentStream should allow drawing images at current position
> -------------------------------------------------------------------
>
> Key: PDFBOX-3305
> URL: https://issues.apache.org/jira/browse/PDFBOX-3305
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Michele Balistreri
> Attachments: pdpagecontentstream-drawimage.diff
>
>
> The PDPageContentStream class has two drawImage methods (one calling the other) but both add a transformation to the graphics state. This patch adds a drawImage method with a single parameter (the image), which only adds the image without applying any transformation.
> This is needed because otherwise there is no other way of setting a transform matrix manually which might have skew/rotation in addition to scaling/translation.
> An alternative to this patch could also be a drawImage method which takes a Matrix and applies it. But still if for whatever reasons multiple images should be drawn with the same transformation matrix this would be inflexible.
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