Fix rendering stall after transition shader on Emscripten / Chrome (v4.1.x)#969
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kblaschke
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| // On WebGL2 / Chrome ANGLE, the default framebuffer's draw buffer must | ||
| // be explicitly set to GL_BACK after preset rendering, which may leave | ||
| // per-FBO draw buffer state that leaks into FBO 0 on some drivers. | ||
| GLenum backBuf = GL_BACK; |
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The docs for glDrawBuffers() for OpenGL Core state:
The symbolic constants GL_FRONT, GL_BACK, GL_LEFT, GL_RIGHT, and GL_FRONT_AND_BACK are not allowed in the bufs array since they may refer to multiple buffers.
So this might break rendering on Desktop versions, or at least cause a GL error to be issued.
I'd highly recommend wrapping this in a #ifdef USE_GLES block.
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Somehow the wrong option was selected, I wanted to request changes. See above.
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