From 4d45eb36f0873f48672f02328693872c86a55815 Mon Sep 17 00:00:00 2001 From: Tobias Scheuer Date: Sun, 29 Mar 2020 12:24:59 +0200 Subject: [PATCH] initialize wgl extension string only once --- src/win/wgl_disp.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/src/win/wgl_disp.c b/src/win/wgl_disp.c index b8e0878fc..893d56041 100644 --- a/src/win/wgl_disp.c +++ b/src/win/wgl_disp.c @@ -68,15 +68,20 @@ typedef struct WGL_DISPLAY_PARAMETERS { static bool is_wgl_extension_supported(const char *extension, HDC dc) { - _ALLEGRO_wglGetExtensionsStringARB_t _wglGetExtensionsStringARB; + static _ALLEGRO_wglGetExtensionsStringARB_t _wglGetExtensionsStringARB; + static ext_is_initialized = false; // this is a simple blocker, would not be safe for multi-threading int ret; /* XXX deprecated in OpenGL 3.0 */ if (!glGetString(GL_EXTENSIONS)) return false; - _wglGetExtensionsStringARB = (_ALLEGRO_wglGetExtensionsStringARB_t) - wglGetProcAddress("wglGetExtensionsStringARB"); + if(!ext_is_initialized) + { + _wglGetExtensionsStringARB = (_ALLEGRO_wglGetExtensionsStringARB_t) + wglGetProcAddress("wglGetExtensionsStringARB"); + ext_is_initialized = true; + } if (!_wglGetExtensionsStringARB) return false; -- 2.24.1.windows.2