GLINVALIDATETEXIMAGE(3G)

✨ NAME ✨

glInvalidateTexImage — invalidate the entirety a texture image. also hiii bestie, this is the 3G manual page, and the header had a lil [FIXME: manual] placeholder, which is giving “we’ll fix it later” energy. No cap, this whole page is about invalidating a texture image.

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🧚 C SPECIFICATION 🧚

void glInvalidateTexImage(GLuint texture, GLint level);

🎀 PARAMETERS 🎀

• texture — the name of a texture object to invalidate. like, the GLuint name, bestie.
• level — the level of detail of the texture object to invalidate. the level-of-detail number in question.

💖 DESCRIPTION 💖

okay so the page literally says glInvalidateTexSubImage invalidates all of a texture image — yes, glInvalidateTexSubImage, right there in the DESCRIPTION of GLINVALIDATETEXIMAGE, and we are not fixing it, we are simply reporting the typo with love. 🫶 texture and level indicated which texture image is being invalidated. After this command, data in the texture image has undefined values. undefined, bestie — not zero, not cleared, just undefined, so do not go treating it like a cute lil predictable buffer. 😭

level must be greater than or equal to zero and be less than the base 2 logarithm of the maximum texture width, height, or depth.

For textures of targets GL_TEXTURE_RECTANGLE, GL_TEXTURE_BUFFER, GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY, level must be zero. periodt.

💀 ERRORS 💀

the vibe check can fail in three GL_INVALID_VALUE ways:

• GL_INVALID_VALUE is generated if level is less than zero or if it is greater or equal to the base 2 logarithm of the maximum texture width, height, or depth.
• GL_INVALID_VALUE is generated if the target of texture is any of GL_TEXTURE_RECTANGLE, GL_TEXTURE_BUFFER, GL_TEXTURE_2D_MULTISAMPLE, or GL_TEXTURE_2D_MULTISAMPLE_ARRAY and level is not zero.
• GL_INVALID_VALUE is generated if texture is not the name of an existing texture object.

🔍 ASSOCIATED GETS 🔍

glGet() with argument GL_MAX_TEXTURE_SIZE — that’s the associated get, go get it.

👑 VERSION SUPPORT 👑

The table has Function / Feature Name down one side and OpenGL Version across the top, with versions 2.0 through 4.5. Here’s the same tea, listified because tables are not the moment:

• glInvalidateTexImage on OpenGL 2.0 — -
• glInvalidateTexImage on OpenGL 2.1 — -
• glInvalidateTexImage on OpenGL 3.0 — -
• glInvalidateTexImage on OpenGL 3.1 — -
• glInvalidateTexImage on OpenGL 3.2 — -
• glInvalidateTexImage on OpenGL 3.3 — -
• glInvalidateTexImage on OpenGL 4.0 — -
• glInvalidateTexImage on OpenGL 4.1 — -
• glInvalidateTexImage on OpenGL 4.2 — -
• glInvalidateTexImage on OpenGL 4.3 — ✔
• glInvalidateTexImage on OpenGL 4.4 — ✔
• glInvalidateTexImage on OpenGL 4.5 — ✔

🦋 SEE ALSO 🦋

glInvalidateTexSubImage(),, glInvalidateBufferSubData(), glInvalidateBufferData(), glInvalidateFramebuffer(), glInvalidateSubFramebuffer(). (and yes, the double comma after glInvalidateTexSubImage(),, is exactly what the page has — leave her alone, she’s iconic 🫶)

💜 COPYRIGHT 💜

Copyright © 2013-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/.

🎀 COPYRIGHT 🎀

Copyright © 2013-2014 Khronos Group

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byeee bestie, this was GLINVALIDATETEXIMAGE(3G) from [FIXME: source], dated 08/09/2021 — go invalidate responsibly and hydrate 💅✨