问题
I am developing a 2d game on Android ICS using OpenGL es 2.0 and java. I am trying to use a lighting system and to do that I render all the lights on a framebuffer and the scene on another, with the intent to blend them using the fragment shader to recreate photoshop overlay effect.
I encountered a problem though, it seems that the fbo doesn't work with multisampling, so if I draw on the fbo I get jagged lines. I noticed that there is a solution for people using ios, but I didn't find anything on Android. Is there a better way to achieve what I am trying to do than the way I am approching this problem? Forgive, me I am a bit new to opengl.
Thank you very much.
回答1:
Multisampling (which you set when you create OpenGL context) works only on default framebuffer.
To have multisampling on FBO you must use one of these extensions:
- GL_IMG_multisampled_render_to_texture
- GL_APPLE_APPLE_framebuffer_multisample
- GL_EXT_multisampled_render_to_texture
Alternatively you can use something like FXAA to achieve full screen anti-aliasing. It's "PC console" version is pretty quick even for mobile devices.
来源：https://stackoverflow.com/questions/10603779/with-opengl-es-2-0-on-android-is-there-a-way-preserve-multisampling-when-render