I’m trying to write the texture file coming from an Image. (SUImageRef) It’s a little weird there is a transformation on outputed result (here enclosed) Something seems shifted or scaled in resulting image and I don’t konw why. Our export with previous sdk was using texture helper and was ok. Ju…

I must admit I’m still struggling with image writing. Two other remarks : 1°) Image data size seems “strange” image size is 577 x 399 pixels which is 690 669 px SUImageGetDataSize returns 691 068 which is exactly (690 669 - 577) So the difference is one line width (577 px). There is some byte…

Hi, You might want to check out this thread . There is a padding for each row of bytes, which is not exposed by the API. That’s what’s causing this apparent “skew”.

Hi Bugra, I’ve read the thread you noticed in your answer and thank for that. You’re totally right it skew the resulting image. But I don’t know how to deal with this padding. First of all, for me, a padding is normaly all around the image (css). In SU API context I only have one line. 577 p…

Hi Phillippe, The padding here is at the end of each row. We forgot to expose the “bytes per row” value but it is easy to calculate: The image has 399 rows and 577 columns of pixels. The data size is 691068 bytes so it is: 691068 / 399 = 1732 bytes per row. SUImageGetDataSize tells you that ther…

Does it means we need to copy and filter the vector pixel_data retrieved by SUImageGetData ? std::vector<SUByte> pixel_data(data_size_in_byte); SUImageGetData(image, data_size_in_byte, &pixel_data[0]); std::vector<SUByte> pixel_filtered(data_size_in_byte2); { // filter code copy <pixel_data> in <p…

Depends on how you are using this data. If you use an image handling library, it should let you specify bytes per row.

Just to be clear, we are aware of this shortcoming in the API. We should return a bytes per row value, or a padding value. And let you enter these in SUTextureCreateFromImageData. We had a regression in behavior from the old API when we changed our internal image handling library.

Because I’m not using an external image library, I actually simply use SUTextureCreateFromImageData, I will filter extra byte padding data as you proposed. Thanks for your analysis time and advice.

Note that this is a regression that happened in SU2014. [image] How should i use s and t scale factor from SUTexture? Developers Yea, that’s what I observed as well. Multiple of 4. This might be a regression however - as we changed the image handling lib for SU2014 and tha…

Get a SUImageRef and write the texture with SUTextureWriteToFile

Developers SketchUp SDK

tt_su April 9, 2015, 3:19pm 10

Note that this is a regression that happened in SU2014.

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Get a SUImageRef and write the texture with SUTextureWriteToFile

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