cpp/openttd-patchpack/source Changeset - r24960:2efc4aec202c

Changeset - r24960:2efc4aec202c

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Michael Lutz - 3 years ago 2021-02-27 17:14:24
michi@icosahedron.de

Fix: [OpenGL] Don't use OpenGL on MESA software renderers.

Performance in this case is worse than not using OpenGL, so just let
OTTD fall back to a different video driver.

1 file changed with 8 insertions and 0 deletions:

src/video/opengl.cpp

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src/video/opengl.cpp

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@@ @@ -15,6 +15,8 @@ @@
 // #define NO_GL_BUFFER_SYNC
 /* Define to enable persistent buffer mapping on AMD GPUs. */
 // #define GL_MAP_PERSISTENT_AMD
 /* Define to allow software rendering backends. */
 // #define GL_ALLOW_SOFTWARE_RENDERER
 #if defined(_WIN32)
 #	include <windows.h>
@@ @@ -536,6 +538,12 @@ const char *OpenGLBackend::Init() @@
 	DEBUG(driver, 1, "OpenGL driver: %s - %s (%s)", vend, renderer, ver);
 #ifndef GL_ALLOW_SOFTWARE_RENDERER
 	/* Don't use MESA software rendering backends as they are slower than
 	 * just using a non-OpenGL video driver. */
 	if (strncmp(renderer, "llvmpipe", 8) == 0 || strncmp(renderer, "softpipe", 8) == 0) return "Software renderer detected, not using OpenGL";
 #endif
 	const char *minor = strchr(ver, '.');
 	_gl_major_ver = atoi(ver);
 	_gl_minor_ver = minor != nullptr ? atoi(minor + 1) : 0;

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