From ca583ba2a9e4ff92021d91c6b7fb0c02e9ab3a0c Mon Sep 17 00:00:00 2001
From: sirius <sirius.ustc@gmail.com>
Date: Tue, 1 Oct 2019 21:01:23 +0800
Subject: [PATCH] solve the problem about disorder of frames, reason is that no
 glReadBuffer() before glReadPixel()

---
 src/engine/client/video.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/engine/client/video.cpp b/src/engine/client/video.cpp
index be5f370ce..ad5941a03 100644
--- a/src/engine/client/video.cpp
+++ b/src/engine/client/video.cpp
@@ -330,6 +330,7 @@ void CVideo::read_rgb_from_gl()
 	m_pPixels = (uint8_t *)realloc(m_pPixels, nvals * sizeof(GLubyte));
 	m_pRGB = (uint8_t *)realloc(m_pRGB, nvals * sizeof(uint8_t));
 	/* Get RGBA to align to 32 bits instead of just 24 for RGB. May be faster for FFmpeg. */
+	glReadBuffer(GL_FRONT);
 	glReadPixels(0, 0, m_Width, m_Height, GL_RGB, GL_UNSIGNED_BYTE, m_pPixels);
 	for (i = 0; i < m_Height; i++)
 	{