Fix engine not starting on Windows if linked against SDL > 2.0.5

[xonotic/darkplaces.git] / gl_backend.c

diff --git a/gl_backend.c b/gl_backend.c
index b99d654aad7a4e9a695993a646bf4c58f16108b6..34895d13730c9d396ec40fbc3a2ddc4981030239 100644 (file)
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -156,6 +156,9 @@ typedef struct gl_state_s
        int defaultframebufferobject; // deal with platforms that use a non-zero default fbo
        qboolean pointer_color_enabled;
 
+       // GL3.2 Core requires that we have a GL_VERTEX_ARRAY_OBJECT, but... just one.
+       unsigned int defaultvao;
+
        int pointer_vertex_components;
        int pointer_vertex_gltype;
        size_t pointer_vertex_stride;
@@ -259,17 +262,21 @@ static void gl_backend_start(void)
 
        CHECKGLERROR
 
-       GL_Backend_ResetState();
-
        switch(vid.renderpath)
        {
        case RENDERPATH_GL32:
+               // GL3.2 Core requires that we have a VAO bound - but using more than one has no performance benefit so this is just placeholder
+               qglGenVertexArrays(1, &gl_state.defaultvao);
+               qglBindVertexArray(gl_state.defaultvao);
+               // fall through
        case RENDERPATH_GLES2:
                // fetch current fbo here (default fbo is not 0 on some GLES devices)
                CHECKGLERROR
                qglGetIntegerv(GL_FRAMEBUFFER_BINDING, &gl_state.defaultframebufferobject);CHECKGLERROR
                break;
        }
+
+       GL_Backend_ResetState();
 }
 
 static void gl_backend_shutdown(void)