opengl - OpenGL: using FTGL and textures

Question

When using FTGL texture fonts, everything works perfectly until I use another texture somewhere else in my program. Then the original texture of the font seems to be lost, and as a consequence, the characters are drawn as black dots. After playing with the various parameters of glTexEnvf, I think the problem is simply that the font doesn't load its default texture back when writing.

Is there a way to access this default texture and bind it before writing?

Answer 1

尝试围绕您的调用来渲染字体

  glPushAttrib(GL_ALL_ATTRIB_BITS);

和

  glPopAttrib();

（正如 rotoglup 建议的那样。）

Answer 2

我从未使用过 FTGL，但您可能只是在使用活动纹理单元时遇到问题。

您是否尝试将 0 以外的纹理单元用于您自己的纹理并将 GL_TEXTURE0 留给 FTGL ？

如果您需要，相关文档在这里。