GstGLAPI
gst_gl_context_wgl_get_gl_api (GstGLContext * context)
{
GstGLContextWGL *context_wgl = GST_GL_CONTEXT_WGL (context);
return context_wgl->priv->context_api;
}
static gboolean
gst_gl_context_wgl_create_context (GstGLContext * context,
GstGLAPI gl_api, GstGLContext * other_context, GError ** error)
{
GstGLWindow *window;
GstGLContextWGL *context_wgl;
GstGLContextWGL *other_wgl = NULL;
HDC device;
context_wgl = GST_GL_CONTEXT_WGL (context);
window = gst_gl_context_get_window (context);
device = (HDC) gst_gl_window_get_display (window);
if (other_context) {
if (!GST_GL_IS_CONTEXT_WGL (other_context)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_WRONG_CONFIG,
"Cannot share context with a non-WGL context");
goto failure;
}
other_wgl = (GstGLContextWGL *) other_context;
}
context_wgl->wgl_context = wglCreateContext (device);
if (context_wgl->wgl_context)
GST_DEBUG ("gl context created: %" G_GUINTPTR_FORMAT,
(guintptr) context_wgl->wgl_context);
else {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT, "failed to create glcontext:0x%x",
(unsigned int) GetLastError ());
goto failure;
}
g_assert (context_wgl->wgl_context);
GST_LOG ("gl context id: %" G_GUINTPTR_FORMAT,
(guintptr) context_wgl->wgl_context);
if (other_wgl) {
if (!wglShareLists (other_wgl->wgl_context, context_wgl->wgl_context)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT, "failed to share contexts 0x%x",
(unsigned int) GetLastError ());
goto failure;
}
}
gst_object_unref (window);
return TRUE;
failure:
gst_object_unref (window);
return FALSE;
}
static void
gst_gl_context_wgl_destroy_context (GstGLContext * context)
{
GstGLContextWGL *context_wgl;
context_wgl = GST_GL_CONTEXT_WGL (context);
if (context_wgl->wgl_context)
wglDeleteContext (context_wgl->wgl_context);
context_wgl->wgl_context = NULL;
}
static gboolean
gst_gl_context_wgl_activate (GstGLContext * context, gboolean activate)
{
GstGLWindow *window;
GstGLContextWGL *context_wgl;
HDC device;
gboolean result;
window = gst_gl_context_get_window (context);
context_wgl = GST_GL_CONTEXT_WGL (context);
device = (HDC) gst_gl_window_get_display (window);
if (activate) {
result = wglMakeCurrent (device, context_wgl->wgl_context);
} else {
result = wglMakeCurrent (NULL, NULL);
}
gst_object_unref (window);
return result;
}
static guintptr
gst_gl_context_wgl_get_gl_context (GstGLContext * context)
{
return (guintptr) GST_GL_CONTEXT_WGL (context)->wgl_context;
}
static gboolean
gst_gl_context_wgl_create_context (GstGLContext * context,
GstGLAPI gl_api, GstGLContext * other_context, GError ** error)
{
GstGLWindow *window;
GstGLContextWGL *context_wgl;
HGLRC external_gl_context = NULL;
HGLRC trampoline;
HDC device;
context_wgl = GST_GL_CONTEXT_WGL (context);
window = gst_gl_context_get_window (context);
device = (HDC) gst_gl_window_get_display (window);
if (other_context) {
if (gst_gl_context_get_gl_platform (other_context) != GST_GL_PLATFORM_WGL) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_WRONG_CONFIG,
"Cannot share context with a non-WGL context");
goto failure;
}
external_gl_context = (HGLRC) gst_gl_context_get_gl_context (other_context);
}
trampoline = wglCreateContext (device);
if (trampoline)
GST_DEBUG ("gl context created: %" G_GUINTPTR_FORMAT,
(guintptr) trampoline);
else {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT, "failed to create glcontext:0x%x",
(unsigned int) GetLastError ());
goto failure;
}
g_assert (trampoline);
/* get extension functions */
wglMakeCurrent (device, trampoline);
context_wgl->priv->wglCreateContextAttribsARB =
(PFNWGLCREATECONTEXTATTRIBSARBPROC)
wglGetProcAddress ("wglCreateContextAttribsARB");
wglMakeCurrent (device, 0);
wglDeleteContext (trampoline);
trampoline = NULL;
if (context_wgl->priv->wglCreateContextAttribsARB != NULL
&& gl_api & GST_GL_API_OPENGL3) {
gint i;
for (i = 0; i < G_N_ELEMENTS (opengl_versions); i++) {
gint profileMask = 0;
gint contextFlags = 0;
if ((opengl_versions[i].major > 3
|| (opengl_versions[i].major == 3
&& opengl_versions[i].minor >= 2))) {
profileMask |= WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
contextFlags |= WGL_CONTEXT_DEBUG_BIT_ARB;
} else {
break;
}
GST_DEBUG_OBJECT (context, "trying to create a GL %d.%d context",
opengl_versions[i].major, opengl_versions[i].minor);
context_wgl->wgl_context = _create_context_with_flags (context_wgl,
device, external_gl_context, opengl_versions[i].major,
opengl_versions[i].minor, contextFlags, profileMask);
if (context_wgl->wgl_context) {
context_wgl->priv->context_api = GST_GL_API_OPENGL3;
break;
}
}
}
if (!context_wgl->wgl_context) {
if (context_wgl->priv->wglCreateContextAttribsARB && external_gl_context) {
context_wgl->wgl_context =
context_wgl->priv->wglCreateContextAttribsARB (device,
external_gl_context, 0);
}
if (!context_wgl->wgl_context) {
context_wgl->wgl_context = wglCreateContext (device);
if (!context_wgl->wgl_context) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT,
"Failed to create WGL context 0x%x",
(unsigned int) GetLastError ());
goto failure;
}
if (external_gl_context) {
if (!wglShareLists (external_gl_context, context_wgl->wgl_context)) {
g_set_error (error, GST_GL_CONTEXT_ERROR,
GST_GL_CONTEXT_ERROR_CREATE_CONTEXT,
"failed to share contexts through wglShareLists 0x%x",
(unsigned int) GetLastError ());
goto failure;
}
}
}
context_wgl->priv->context_api = GST_GL_API_OPENGL;
}
GST_LOG ("gl context id: %" G_GUINTPTR_FORMAT,
(guintptr) context_wgl->wgl_context);
gst_object_unref (window);
return TRUE;
failure:
gst_object_unref (window);
return FALSE;
}
