static gboolean
create_objects (GstVaapiTextureGLX * texture, guint texture_id)
{
GstVaapiTexture *const base_texture = GST_VAAPI_TEXTURE (texture);
Display *const dpy = GST_VAAPI_OBJECT_NATIVE_DISPLAY (texture);
GLContextState old_cs;
gboolean success = FALSE;
gl_get_current_context (&old_cs);
texture->gl_context = gl_create_context (dpy, DefaultScreen (dpy), &old_cs);
if (!texture->gl_context ||
!gl_set_current_context (texture->gl_context, NULL))
return FALSE;
texture->pixo = gl_create_pixmap_object (dpy,
base_texture->width, base_texture->height);
if (!texture->pixo) {
GST_ERROR ("failed to create GLX pixmap");
goto out_reset_context;
}
texture->fbo = gl_create_framebuffer_object (base_texture->gl_target,
texture_id, base_texture->width, base_texture->height);
if (!texture->fbo) {
GST_ERROR ("failed to create FBO");
goto out_reset_context;
}
success = TRUE;
out_reset_context:
gl_set_current_context (&old_cs, NULL);
return success;
}
static gboolean
_gst_vaapi_window_glx_create_context (GstVaapiWindow * window,
GLXContext foreign_context)
{
GstVaapiWindowGLXPrivate *const priv =
GST_VAAPI_WINDOW_GLX_GET_PRIVATE (window);
Display *const dpy = GST_VAAPI_WINDOW_NATIVE_DISPLAY (window);
GLContextState parent_cs;
parent_cs.display = dpy;
parent_cs.window = None;
parent_cs.context = foreign_context;
GST_VAAPI_WINDOW_LOCK_DISPLAY (window);
priv->gl_context = gl_create_context (dpy, DefaultScreen (dpy), &parent_cs);
if (!priv->gl_context) {
GST_DEBUG ("could not create GLX context");
goto end;
}
if (!glXIsDirect (dpy, priv->gl_context->context)) {
GST_DEBUG ("could not create a direct-rendering GLX context");
goto out_destroy_context;
}
goto end;
out_destroy_context:
gl_destroy_context (priv->gl_context);
priv->gl_context = NULL;
end:
GST_VAAPI_WINDOW_UNLOCK_DISPLAY (window);
return priv->gl_context != NULL;
}
/*
* Create an Off-Screen Mesa rendering context. The only attribute needed is
* an RGBA vs Color-Index mode flag.
*
* Input: format - either GL_RGBA or GL_COLOR_INDEX
* sharelist - specifies another OSMesaContext with which to share
* display lists. NULL indicates no sharing.
* Return: an OSMesaContext or 0 if error
*/
OSMesaContext OSMesaCreateContext( GLenum format, OSMesaContext sharelist )
{
OSMesaContext osmesa;
GLfloat rscale, gscale, bscale, ascale;
GLint rshift, gshift, bshift, ashift;
GLint rind, gind, bind;
GLint index_bits;
GLboolean rgbmode;
GLboolean swalpha;
GLuint i4 = 1;
GLubyte *i1 = (GLubyte *) &i4;
GLint little_endian = *i1;
swalpha = GL_FALSE;
rind = gind = bind = 0;
if (format==OSMESA_COLOR_INDEX) {
rscale = gscale = bscale = ascale = 0.0;
index_bits = 8;
rshift = gshift = bshift = ashift = 0;
rgbmode = GL_FALSE;
}
else if (format==OSMESA_RGBA) {
rscale = gscale = bscale = ascale = 255.0;
index_bits = 0;
if (little_endian) {
rshift = 0;
gshift = 8;
bshift = 16;
ashift = 24;
}
else {
rshift = 24;
gshift = 16;
bshift = 8;
ashift = 0;
}
rgbmode = GL_TRUE;
}
else if (format==OSMESA_BGRA) {
rscale = gscale = bscale = ascale = 255.0;
index_bits = 0;
if (little_endian) {
ashift = 0;
rshift = 8;
gshift = 16;
bshift = 24;
}
else {
bshift = 24;
gshift = 16;
rshift = 8;
ashift = 0;
}
rgbmode = GL_TRUE;
}
else if (format==OSMESA_ARGB) {
rscale = gscale = bscale = ascale = 255.0;
index_bits = 0;
if (little_endian) {
bshift = 0;
gshift = 8;
rshift = 16;
ashift = 24;
}
else {
ashift = 24;
rshift = 16;
gshift = 8;
bshift = 0;
}
rgbmode = GL_TRUE;
}
else if (format==OSMESA_RGB) {
rscale = gscale = bscale = ascale = 255.0;
index_bits = 0;
bshift = 0;
gshift = 8;
rshift = 16;
ashift = 24;
bind = 2;
gind = 1;
rind = 0;
rgbmode = GL_TRUE;
swalpha = GL_TRUE;
}
else if (format==OSMESA_BGR) {
rscale = gscale = bscale = ascale = 255.0;
index_bits = 0;
bshift = 0;
gshift = 8;
rshift = 16;
ashift = 24;
bind = 0;
gind = 1;
rind = 2;
rgbmode = GL_TRUE;
swalpha = GL_TRUE;
}
else {
return NULL;
}
osmesa = (OSMesaContext) calloc( 1, sizeof(struct osmesa_context) );
if (osmesa) {
osmesa->gl_visual = gl_create_visual( rgbmode,
swalpha, /* software alpha */
GL_FALSE, /* db_flag */
DEPTH_BITS,
STENCIL_BITS,
ACCUM_BITS,
index_bits,
rscale, gscale, bscale, ascale );
if (!osmesa->gl_visual) {
return NULL;
}
osmesa->gl_ctx = gl_create_context( osmesa->gl_visual,
sharelist ? sharelist->gl_ctx : NULL,
(void *) osmesa );
if (!osmesa->gl_ctx) {
gl_destroy_visual( osmesa->gl_visual );
free(osmesa);
return NULL;
}
osmesa->gl_buffer = gl_create_framebuffer( osmesa->gl_visual );
if (!osmesa->gl_buffer) {
gl_destroy_visual( osmesa->gl_visual );
gl_destroy_context( osmesa->gl_ctx );
free(osmesa);
return NULL;
}
osmesa->format = format;
osmesa->buffer = NULL;
osmesa->width = 0;
osmesa->height = 0;
osmesa->pixel = 0;
osmesa->clearpixel = 0;
osmesa->rowlength = 0;
osmesa->yup = GL_TRUE;
osmesa->rshift = rshift;
osmesa->gshift = gshift;
osmesa->bshift = bshift;
osmesa->ashift = ashift;
osmesa->rind = rind;
osmesa->gind = gind;
osmesa->bind = bind;
}
return osmesa;
}
