opengl - GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT 错误

Question

我在我的 OpenGL 代码中使用FBOGL\_FRAMEBUFFER\_INCOMPLETE\_DUPLICATE\_ATTACHMENT\_EXT并且在. 这是什么原因，我该如何解决？

Answer 1

这个错误的原因是 NVIDIA 的glext.h的旧版本，它仍然有这个定义。而最新版本的GLEW则没有。这会导致您之前编写或从 Web 获得的代码中出现编译错误。

FBO的GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT定义曾经出现在规范中（因此也出现在头文件中）。但是，它后来被删除了。原因可以在FBO 扩展规范中找到（查找第 87 期）：

(87) What happens if a single image is attached more than once to a
     framebuffer object?

     RESOLVED: The value written to the pixel is undefined.

     There used to be a rule in section 4.4.4.2 that resulted in
     FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT if a single
     image was attached more than once to a framebuffer object.

         FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT   0x8CD8

         * A single image is not attached more than once to the
           framebuffer object.

           { FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT }

     This rule was removed in version #117 of the
     EXT_framebuffer_object specification after discussion at the
     September 2005 ARB meeting.  The rule essentially required an
     O(n*lg(n)) search.  Some implementations would not need to do that
     search if the completeness rules did not require it.  Instead,
     language was added to section 4.10 which says the values
     written to the framebuffer are undefined when this rule is
     violated.

要修复此错误，请从您的代码中删除对GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT的所有使用。

如果这在您的设置中是不可能的，那么在您的glext.h或glew.h文件中添加一个虚拟定义，如下所示：

#define GL_FRAMEBUFFER_INCOMPLETE_DUPLICATE_ATTACHMENT_EXT 0x8CD8