Function readPixels

server/backend.cpp:1029–1080

void readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format,
	GLenum type, void *data)
{
	if(fconfig.egl)
	{
		bool fallthrough = true;
		VGLFBConfig config = CTXHASHEGL.findConfig(_eglGetCurrentContext());
		FakePbuffer *readpb = getCurrentFakePbuffer(EGL_READ);

		if(config && config->attr.samples > 1 && readpb)
		{
			GLuint fbo = 0, rbo = 0;
			_glGenFramebuffers(1, &fbo);
			if(fbo)
			{
				BufferState bs(BS_DRAWFBO | BS_READFBO | BS_DRAWBUFS | BS_READBUF);
				_glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);

				_glGenRenderbuffers(1, &rbo);
				if(rbo)
				{
					BufferState bsRBO(BS_RBO);
					_glBindRenderbuffer(GL_RENDERBUFFER, rbo);

					GLenum internalFormat = GL_RGB8;
					if(config->attr.redSize > 8) internalFormat = GL_RGB10_A2;
					else if(config->attr.alphaSize) internalFormat = GL_RGBA8;
					_glRenderbufferStorage(GL_RENDERBUFFER, internalFormat,
						readpb->getWidth(), readpb->getHeight());
					_glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
						GL_RENDERBUFFER, rbo);

					GLenum status = _glCheckFramebufferStatus(GL_DRAW_FRAMEBUFFER);
					if(status == GL_FRAMEBUFFER_COMPLETE)
					{
						_glBlitFramebuffer(0, 0, readpb->getWidth(), readpb->getHeight(),
							0, 0, readpb->getWidth(), readpb->getHeight(),
							GL_COLOR_BUFFER_BIT, GL_NEAREST);
						_glBindFramebuffer(GL_DRAW_FRAMEBUFFER, bs.getOldReadFBO());
						_glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
						_glReadPixels(x, y, width, height, format, type, data);
						fallthrough = false;
					}
					_glDeleteRenderbuffers(1, &rbo);
				}
				_glDeleteFramebuffers(1, &fbo);
			}
		}
		if(!fallthrough) return;
	}
	_glReadPixels(x, y, width, height, format, type, data);
}


void swapBuffers(Display *dpy, GLXDrawable drawable)