OpenGL frame buffer

Blog late at night .

Frame buffer ：

         Color buffer used to write color values 、 The combination of the depth buffer used to write depth information and the template buffer that allows us to discard specific fragments according to some conditions is called frame buffer .

OpenGL Allows us to define our own frame buffer , That is, we can define our own color buffer , Even depth buffering and template buffering .

Four conditions of frame buffer ：

• Attach at least one buffer （ Color 、 Depth or template buffer ）.
• At least one color attachment (Attachment).
• All attachments must be complete （ Memory reserved ）.
• Each buffer should have the same number of samples .

The attachment Is a memory location , It can be used as a buffer of frame buffer .

When creating an attachment, we have two options ： Texture or render buffer objects (Renderbuffer Object).