/* Helper function for 'CHOOSE' macro. Do what's necessary when an
* entrypoint is called for the first time.
*/
static void do_choose( GLuint attr, GLuint sz,
void (*attr_func)( const GLfloat *),
void (*choose1)( const GLfloat *),
void (*choose2)( const GLfloat *),
void (*choose3)( const GLfloat *),
void (*choose4)( const GLfloat *),
const GLfloat *v )
{
GET_CURRENT_CONTEXT( ctx );
TNLcontext *tnl = TNL_CONTEXT(ctx);
static GLfloat id[4] = { 0, 0, 0, 1 };
int i;
if (tnl->save.attrsz[attr] < sz) {
/* New size is larger. Need to flush existing vertices and get
* an enlarged vertex format.
*/
_save_upgrade_vertex( ctx, attr, sz );
}
else {
/* New size is equal or smaller - just need to fill in some
* zeros.
*/
for (i = sz ; i <= tnl->save.attrsz[attr] ; i++)
tnl->save.attrptr[attr][i-1] = id[i-1];
}
/* Reset any active pointers for this attribute
*/
tnl->save.tabfv[attr][0] = choose1;
tnl->save.tabfv[attr][1] = choose2;
tnl->save.tabfv[attr][2] = choose3;
tnl->save.tabfv[attr][3] = choose4;
/* Update the secondary dispatch table with the new function
*/
tnl->save.tabfv[attr][sz-1] = attr_func;
(*attr_func)(v);
}
static void save_fixup_vertex( GLcontext *ctx, GLuint attr, GLuint sz )
{
struct vbo_save_context *save = &vbo_context(ctx)->save;
if (sz > save->attrsz[attr]) {
/* New size is larger. Need to flush existing vertices and get
* an enlarged vertex format.
*/
_save_upgrade_vertex( ctx, attr, sz );
}
else if (sz < save->active_sz[attr]) {
static GLfloat id[4] = { 0, 0, 0, 1 };
GLuint i;
/* New size is equal or smaller - just need to fill in some
* zeros.
*/
for (i = sz ; i <= save->attrsz[attr] ; i++)
save->attrptr[attr][i-1] = id[i-1];
}
save->active_sz[attr] = sz;
}
static void
save_fixup_vertex(struct gl_context *ctx, GLuint attr, GLuint sz)
{
struct vbo_save_context *save = &vbo_context(ctx)->save;
if (sz > save->attrsz[attr]) {
/* New size is larger. Need to flush existing vertices and get
* an enlarged vertex format.
*/
_save_upgrade_vertex(ctx, attr, sz);
}
else if (sz < save->active_sz[attr]) {
GLuint i;
const GLfloat *id = vbo_get_default_vals_as_float(save->attrtype[attr]);
/* New size is equal or smaller - just need to fill in some
* zeros.
*/
for (i = sz; i <= save->attrsz[attr]; i++)
save->attrptr[attr][i - 1] = id[i - 1];
}
save->active_sz[attr] = sz;
}