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Nintendo 3DS
CTR_Redshift - hardware-based blue light filter for old3DS and 2DS
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<blockquote data-quote="Sono" data-source="post: 9258127" data-attributes="member: 373734"><p>Nope.</p><p></p><p>Getting the redshift alone working required reverse engineering part of the display controller so it can work on both new3DS and old3DS. Sadly there is just no hardware to do this. Not even if we had access to all hardware. There is just no hardware support (not even in the GPU!) which could allow me to adjust hue or saturation, without just re-calculating each pixel on the CPU, which is not good.</p><p></p><p>Gamma adjustments are limited too because it has <a href="https://www.youtube.com/watch?v=h9j89L8eQQk" target="_blank">limited precision</a> which creates noticable banding if the precision drop is around 2 or 3 bits big. This happens because gamma adjustment can only be done at the final stage after the GPU has already outputted the 8bit or 5bit image, and the gamma correction table is only 8bits (contains 256 entries).</p><p></p><p>Fun fact: CTR_Redshift uses this method for redshift, meaning there are some games which will always have banding, but on some games the banding will only occur if the redshift parameters are too extreme.</p></blockquote><p></p>
[QUOTE="Sono, post: 9258127, member: 373734"] Nope. Getting the redshift alone working required reverse engineering part of the display controller so it can work on both new3DS and old3DS. Sadly there is just no hardware to do this. Not even if we had access to all hardware. There is just no hardware support (not even in the GPU!) which could allow me to adjust hue or saturation, without just re-calculating each pixel on the CPU, which is not good. Gamma adjustments are limited too because it has [URL='https://www.youtube.com/watch?v=h9j89L8eQQk']limited precision[/URL] which creates noticable banding if the precision drop is around 2 or 3 bits big. This happens because gamma adjustment can only be done at the final stage after the GPU has already outputted the 8bit or 5bit image, and the gamma correction table is only 8bits (contains 256 entries). Fun fact: CTR_Redshift uses this method for redshift, meaning there are some games which will always have banding, but on some games the banding will only occur if the redshift parameters are too extreme. [/QUOTE]
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