From: bones_was_here <bones_was_here@xonotic.au>
Date: Tue, 3 Oct 2023 14:46:10 +0000 (+1000)
Subject: Work around black texture bug on AMD's Windows driver
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=85827aea57790c38ce07724c41b297d9bbbbd281;p=xonotic%2Fdarkplaces.git

Work around black texture bug on AMD's Windows driver

Closes https://gitlab.com/xonotic/darkplaces/-/issues/228

Signed-off-by: bones_was_here <bones_was_here@xonotic.au>
---

diff --git a/vid_shared.c b/vid_shared.c
index 2a9b84ba..1a418dd2 100644
--- a/vid_shared.c
+++ b/vid_shared.c
@@ -778,6 +778,17 @@ void GL_Setup(void)
 // COMMANDLINEOPTION: GL: -notexturegather disables GL_ARB_texture_gather (which provides fetch4 sampling)
 // COMMANDLINEOPTION: GL: -nogldebugoutput disables GL_ARB_debug_output (which provides the gl_debug feature, if enabled)
 
+#ifdef WIN32
+	// gl_texturecompression_color is somehow broken on AMD's Windows driver,
+	// see: https://gitlab.com/xonotic/darkplaces/-/issues/228
+	// HACK: force it off (less bad than adding hacky checks to the renderer)
+	if (strncmp(gl_renderer, "AMD Radeon(TM)", 14) == 0)
+	{
+		Cvar_SetQuick(&gl_texturecompression_color, "0");
+		gl_texturecompression_color.flags |= CF_READONLY;
+	}
+#endif
+
 #ifdef GL_MAX_DRAW_BUFFERS
 	qglGetIntegerv(GL_MAX_DRAW_BUFFERS, (GLint*)&vid.maxdrawbuffers);
 	CHECKGLERROR