CODEWITHSUNDEEP
openglglfw
Irbis
Irbis

Reputation: 1491

OpenGL - how to check a default framebuffer color encoding

I have created an OpenGL application using GLFW library. The default framebuffer supports SRGB: glfwWindowHint(GLFW_SRGB_CAPABLE, 1);

After calling glEnable(GL_FRAMEBUFFER_SRGB) I get a desired result on the screen when render a test texture.

Out of curiosity I have called glGetFramebufferAttachmentParameteriv for the default framebuffer:

GLint encoding = 0;
glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_BACK_LEFT, GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING, &encoding);

The encoding variable equals GL_LINEAR (also for GL_FRONT_LEFT buffer). The documentation says that:

For a default framebuffer, color encoding is determined by the implementation.

but I have set SRGB encoding explicitly during window creation so the encoding variable should be equal to GL_SRGB. Could you explain how does it work ?

Upvotes: 1

Views: 1162

Answers (1)

Mark Miller
Mark Miller

Reputation: 156

Does your system support the extensions like EXT_framebuffer_sRGB or ARB_framebuffer_sRGB?

You will need this for the sRGB default framebuffer.

Upvotes: 0

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