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Published 20 hours ago • verified publisher icon ntut-open-source-club

Image Alignment Issue w/ Some PNG files

Open NOOBDY opened this issue 1 year ago • 0 comments

Problem

PNG/JPG files converted from GIF (from this website) has alignment issues when displayed on screen. However, BMP files converted with the same method doesn't have these issues.

Adding glPixelStorei(GL_UNPACK_ALIGNMENT, 1) before glTexImage2D fixes the issue with PNG/JPG files, but breaks BMP files. Also, glPixelStorei(GL_UNPACK_ALIGNMENT, 1) doesn't seems to have any affect on images that are not converted from GIFs.

Demo

PNG w/o glPixelStorei(GL_UNPACK_ALIGNMENT, 1)

image

PNG w/ glPixelStorei(GL_UNPACK_ALIGNMENT, 1)

image

BMP w/o glPixelStorei(GL_UNPACK_ALIGNMENT, 1)

image

BMP w/ glPixelStorei(GL_UNPACK_ALIGNMENT, 1)

image

Proposed Workaround

Use BMP when converting from GIFs

NOOBDY avatar Feb 11 '24 17:02 NOOBDY