Added JPEG not appearing

arlomedia
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IP: 71.36.119.126 5 years 2 months ago #15533 by arlomedia

Replied by arlomedia on topic Added JPEG not appearing

Great, now the JPEG appears! And I can use this matrix to show it full-page:

Code:

Matrix(pageWidth.toFloat(), pageHeight.toFloat(), 0f, 0f)

Can I also use the matrix to rotate the image? I'm using this matrix to rotate annotations 90 degrees:

Code:

Matrix(0f, 1f, -1f, 0f, pageHeight.toFloat(), 0f)

But when I use that in the content.GSSetMatrix function above, the image doesn't appear. Even with this default matrix that doesn't do any rotation, the image doesn't appear:

Code:

Matrix(1f, 0f, 0f, 1f, 0f, 0f)

How do you recommend adding rotation to the code above?

radaee
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IP: 111.196.244.79 5 years 2 months ago #15534 by radaee

Replied by radaee on topic Added JPEG not appearing

the code:

Code:

Matrix(0f, 1f, -1f, 0f, pageHeight.toFloat(), 0f)

can only display 1 pixel on PDF page, you shall passs

Code:

Matrix(0f, height, -width, 0f, pageHeight.toFloat(), 0f)

arlomedia
Topic Author
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IP: 71.36.119.126 5 years 2 months ago #15535 by arlomedia

Replied by arlomedia on topic Added JPEG not appearing

Oh, got it. For the record, this rotated the image 90 degrees counterclockwise:

Code:

Matrix(0f, height, -width, 0f, width, 0f)

And this rotated 90 degrees clockwise:

Code:

Matrix(0f, -height, width, 0f, 0f, height)

I have everything working as intended now. Thanks!

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