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[glx backend] use FBConfigs instead of Visuals for GL context creation

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This replaces calls to the old (glx 1.2) functions glXChooseVisual,
glXCreateContext, glXMakeCurrent with the 1.3+ fbconfig varients
glXChooseFBConfig, glXCreateNewContext, glXMakeContextCurrent.
This commit is contained in:
Robert Bragg 2009-07-31 17:07:10 +01:00
parent 15d7a86621
commit 45a668bef8
1 changed files with 75 additions and 47 deletions
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122
clutter/glx/clutter-backend-glx.c
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@ -354,6 +354,60 @@ clutter_backend_glx_get_features (ClutterBackend *backend)
return flags;
}
static gboolean
clutter_backend_glx_get_fbconfig (ClutterBackendX11 *backend_x11,
GLXFBConfig *config)
{
int attributes[] = {
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_DOUBLEBUFFER, GL_TRUE,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_DEPTH_SIZE, 1,
GLX_STENCIL_SIZE, 1,
None
};
GLXFBConfig *configs = NULL;
int n_configs;
if (backend_x11->xdpy == None || backend_x11->xscreen == None)
return FALSE;
CLUTTER_NOTE (BACKEND,
"Retrieving GL fbconfig, dpy: %p, xscreen; %p (%d)",
backend_x11->xdpy,
backend_x11->xscreen,
backend_x11->xscreen_num);
configs = glXChooseFBConfig (backend_x11->xdpy,
backend_x11->xscreen_num,
attributes,
&n_configs);
if (configs)
*config = configs[0];
XFree (configs);
if (configs)
return TRUE;
else
return FALSE;
}
static XVisualInfo *
clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
{
GLXFBConfig config;
if (!clutter_backend_glx_get_fbconfig (backend_x11, &config))
return NULL;
return glXGetVisualFromFBConfig (backend_x11->xdpy, config);
}
static gboolean
clutter_backend_glx_create_context (ClutterBackend *backend,
GError **error)
@ -363,20 +417,25 @@ clutter_backend_glx_create_context (ClutterBackend *backend,
if (backend_glx->gl_context == None)
{
XVisualInfo *xvisinfo;
GLXFBConfig config;
gboolean is_direct;
xvisinfo = clutter_backend_x11_get_visual_info (backend_x11);
if (!clutter_backend_glx_get_fbconfig (backend_x11, &config))
{
g_set_error (error, CLUTTER_INIT_ERROR,
CLUTTER_INIT_ERROR_BACKEND,
"Unable to find suitable fbconfig for GL context");
return FALSE;
}
CLUTTER_NOTE (GL, "Creating GL Context (display: %p)",
backend_x11->xdpy);
backend_glx->gl_context = glXCreateContext (backend_x11->xdpy,
xvisinfo,
0,
True);
XFree (xvisinfo);
backend_glx->gl_context =
glXCreateNewContext (backend_x11->xdpy,
config,
GLX_RGBA_TYPE,
NULL,
True);
if (backend_glx->gl_context == None)
{
@ -415,7 +474,7 @@ clutter_backend_glx_ensure_context (ClutterBackend *backend,
backend_x11 = CLUTTER_BACKEND_X11 (backend);
CLUTTER_NOTE (MULTISTAGE, "Clearing all context");
glXMakeCurrent (backend_x11->xdpy, None, NULL);
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
}
else
{
@ -450,20 +509,21 @@ clutter_backend_glx_ensure_context (ClutterBackend *backend,
CLUTTER_NOTE (MULTISTAGE,
"Received a stale stage, clearing all context");
glXMakeCurrent (backend_x11->xdpy, None, NULL);
glXMakeContextCurrent (backend_x11->xdpy, None, None, NULL);
}
else
{
CLUTTER_NOTE (BACKEND,
"MakeCurrent dpy: %p, window: 0x%x (%s), context: %p",
"MakeContextCurrent dpy: %p, window: 0x%x (%s), context: %p",
stage_x11->xdpy,
(int) stage_x11->xwin,
stage_x11->is_foreign_xwin ? "foreign" : "native",
backend_glx->gl_context);
glXMakeCurrent (stage_x11->xdpy,
stage_x11->xwin,
backend_glx->gl_context);
glXMakeContextCurrent (stage_x11->xdpy,
stage_x11->xwin,
stage_x11->xwin,
backend_glx->gl_context);
}
if (clutter_x11_untrap_x_errors ())
@ -603,38 +663,6 @@ clutter_backend_glx_create_stage (ClutterBackend *backend,
return stage_window;
}
static XVisualInfo *
clutter_backend_glx_get_visual_info (ClutterBackendX11 *backend_x11)
{
XVisualInfo *xvisinfo;
int attributes[] = {
GLX_RGBA,
GLX_DOUBLEBUFFER,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_ALPHA_SIZE, 1,
GLX_STENCIL_SIZE, 1,
GLX_DEPTH_SIZE, 1,
0
};
if (backend_x11->xdpy == None || backend_x11->xscreen == None)
return NULL;
CLUTTER_NOTE (BACKEND,
"Retrieving GL visual, dpy: %p, xscreen; %p (%d)",
backend_x11->xdpy,
backend_x11->xscreen,
backend_x11->xscreen_num);
xvisinfo = glXChooseVisual (backend_x11->xdpy,
backend_x11->xscreen_num,
attributes);
return xvisinfo;
}
static void
clutter_backend_glx_class_init (ClutterBackendGLXClass *klass)
{