When should I use GL_SRGB8 instead of GL_RGB8?
opengl, srgb
Solution
Essentially yes to all of them. However (3) has an additional constraint: For a framebuffer to do linear RGB to sRGB conversion, the color attachment must be in SRGB format itself, i.e. be a sRGB texture, renderbuffer or a main window with a sRGB pixelformat.
Problem
With respect to RGB and sRGB, are the following understandings I have (or not) true? - I read an authored image (a .png) into a `GL_SRGB8` format texture. - (q) When sampling the texture from (1) the hardware will convert from sRGB to linear colour space? - I read an authored image into a `GL_RGB8` texture. - (q) When sampling the texture from (2) the hardware will not convert from sRGB to linear? - I set `GL_FRAMEBUFFER_SRGB` to true at the final stage of my pipeline. - (q) When displaying the back buffer the hardware will convert from linear to sRGB colour space? - I have a pipeline with 5 stages, each writing to a floating point texture (`GL_RGBA16F`) - (q) The whole pipeline is linear until the final stage, provided (1) and (3) are true.