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glcontext/glx: try creating a context with the highest version

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nvidia drivers return the exact version in glGstString (GL_VERSION)
we request on creation so start with the highest known version and
work our way down.
This commit is contained in:
Matthew Waters 2015-07-17 13:48:00 +10:00 committed by Tim-Philipp Müller
parent 78957c45c2
commit 3343e2dccd
1 changed files with 98 additions and 43 deletions
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141
gst-libs/gst/gl/x11/gstglcontext_glx.c
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@ -135,6 +135,80 @@ _describe_fbconfig (Display * display, GLXFBConfig config)
GST_DEBUG ("stencil: %d", val);
}
/* list of known OpenGL versions */
/* *INDENT-OFF* */
static const struct { int major, minor; } gl_versions[] = {
{4, 5},
{4, 4},
{4, 3},
{4, 2},
{4, 1},
{4, 0},
{3, 3},
{3, 2},
{3, 1},
{3, 0},
{2, 1},
{2, 0},
{1, 5},
{1, 4},
{1, 3},
{1, 2},
{1, 1},
{1, 0},
{0, 0} /* end of list */
};
/* *INDENT-ON* */
static GLXContext
_create_context_with_flags (GstGLContextGLX * context_glx, Display * dpy,
GLXFBConfig fbconfig, GLXContext share_context, gint major, gint minor,
gint contextFlags, gint profileMask)
{
GLXContext ret;
#define N_ATTRIBS 20
gint attribs[N_ATTRIBS];
int x_error = 0;
gint n = 0;
if (major) {
attribs[n++] = GLX_CONTEXT_MAJOR_VERSION_ARB;
attribs[n++] = major;
}
if (minor) {
attribs[n++] = GLX_CONTEXT_MINOR_VERSION_ARB;
attribs[n++] = minor;
}
if (contextFlags) {
attribs[n++] = GLX_CONTEXT_FLAGS_ARB;
attribs[n++] = contextFlags;
}
#ifdef GLX_ARB_create_context_profile
if (profileMask) {
attribs[n++] = GLX_CONTEXT_PROFILE_MASK_ARB;
attribs[n++] = profileMask;
}
#endif
attribs[n++] = None;
g_assert (n < N_ATTRIBS);
#undef N_ATTRIBS
gst_gl_window_x11_trap_x_errors ();
ret = context_glx->priv->glXCreateContextAttribsARB (dpy, fbconfig,
share_context, True, attribs);
x_error = gst_gl_window_x11_untrap_x_errors ();
if (x_error)
ret = 0;
return ret;
}
static gboolean
gst_gl_context_glx_create_context (GstGLContext * context,
GstGLAPI gl_api, GstGLContext * other_context, GError ** error)
@ -145,7 +219,6 @@ gst_gl_context_glx_create_context (GstGLContext * context,
GstGLDisplay *display;
gboolean create_context;
const char *glx_exts;
int x_error = 0;
Display *device;
guintptr external_gl_context = 0;
@ -174,53 +247,35 @@ gst_gl_context_glx_create_context (GstGLContext * context,
"glXCreateContextAttribsARB");
if (create_context && context_glx->priv->glXCreateContextAttribsARB) {
int context_attribs_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 1,
GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
#if !defined(GST_DISABLE_GST_DEBUG)
GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_DEBUG_BIT_ARB,
#endif
None
};
gint i;
int context_attribs_pre_3[] = {
GLX_CONTEXT_MAJOR_VERSION_ARB, 1,
GLX_CONTEXT_MINOR_VERSION_ARB, 4,
None
};
for (i = 0; i < G_N_ELEMENTS (gl_versions); i++) {
GstGLAPI selected_gl_api;
gint profileMask = 0;
gint contextFlags = 0;
if (gl_api & GST_GL_API_OPENGL3) {
GST_DEBUG_OBJECT (window, "trying to create a GL 3.1 core context");
gst_gl_window_x11_trap_x_errors ();
context_glx->glx_context =
context_glx->priv->glXCreateContextAttribsARB (device,
context_glx->priv->fbconfigs[0], (GLXContext) external_gl_context,
True, context_attribs_3);
if (gl_api & GST_GL_API_OPENGL3 && (gl_versions[i].major > 3
|| (gl_versions[i].major == 3 && gl_versions[i].minor >= 2))) {
profileMask |= GLX_CONTEXT_CORE_PROFILE_BIT_ARB;
selected_gl_api = GST_GL_API_OPENGL3;
contextFlags |= GLX_CONTEXT_DEBUG_BIT_ARB;
} else {
selected_gl_api = GST_GL_API_OPENGL;
}
x_error = gst_gl_window_x11_untrap_x_errors ();
GST_DEBUG_OBJECT (context, "trying to create a GL %d.%d context",
gl_versions[i].major, gl_versions[i].minor);
if (x_error != 0)
context_glx->glx_context = NULL;
context_glx->priv->context_api = GST_GL_API_OPENGL3;
context_glx->glx_context = _create_context_with_flags (context_glx,
device, context_glx->priv->fbconfigs[0],
(GLXContext) external_gl_context, gl_versions[i].major,
gl_versions[i].minor, contextFlags, profileMask);
if (context_glx->glx_context) {
context_glx->priv->context_api = selected_gl_api;
break;
}
}
if (gl_api & GST_GL_API_OPENGL && context_glx->glx_context == NULL) {
GST_DEBUG_OBJECT (window, "trying to create a GL 1.4 context");
gst_gl_window_x11_trap_x_errors ();
context_glx->glx_context =
context_glx->priv->glXCreateContextAttribsARB (device,
context_glx->priv->fbconfigs[0], (GLXContext) external_gl_context,
True, context_attribs_pre_3);
x_error = gst_gl_window_x11_untrap_x_errors ();
if (x_error != 0)
context_glx->glx_context = NULL;
context_glx->priv->context_api = GST_GL_API_OPENGL;
}
} else {
context_glx->glx_context =
glXCreateContext (device, window_x11->visual_info,