OpenGL Programming Guide: The Official Guide to Learning OpenGL, Version 4.3, Eighth Edition

Proxy Textures

In addition to the texture targets listed in Table 6.1, OpenGL supports what are known as proxy texture targets. Each standard texture target⁴ has a corresponding proxy texture target. Table 6.5 lists the standard texture targets and their corresponding proxy texture targets.

4. All targets except for GL_TEXTURE_BUFFER have a corresponding proxy texture target.

Table 6.5. Texture Targets and Corresponding Proxy Targets

Proxy texture targets may be used to test the capabilities of the OpenGL implementation when certain limits are used in combination with each other. For example, consider an OpenGL implementation that reports a ...