/**
* This is when a vertex attribute transitions to a different size.
* For example, we saw a bunch of glTexCoord2f() calls and now we got a
* glTexCoord4f() call. We promote the array from size=2 to size=4.
* \param newSize size of new vertex (number of 32-bit words).
*/
static void
vbo_exec_fixup_vertex(struct gl_context *ctx, GLuint attr,
GLuint newSize, GLenum newType)
{
struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
if (newSize > exec->vtx.attrsz[attr] ||
newType != exec->vtx.attrtype[attr]) {
/* New size is larger. Need to flush existing vertices and get
* an enlarged vertex format.
*/
vbo_exec_wrap_upgrade_vertex( exec, attr, newSize );
}
else if (newSize < exec->vtx.active_sz[attr]) {
GLuint i;
const fi_type *id =
vbo_get_default_vals_as_union(exec->vtx.attrtype[attr]);
/* New size is smaller - just need to fill in some
* zeros. Don't need to flush or wrap.
*/
for (i = newSize; i <= exec->vtx.attrsz[attr]; i++)
exec->vtx.attrptr[attr][i-1] = id[i-1];
}
exec->vtx.active_sz[attr] = newSize;
/* Does setting NeedFlush belong here? Necessitates resetting
* vtxfmt on each flush (otherwise flags won't get reset
* afterwards).
*/
if (attr == 0)
ctx->Driver.NeedFlush |= FLUSH_STORED_VERTICES;
}
static void vbo_exec_fixup_vertex( GLcontext *ctx,
GLuint attr, GLuint sz )
{
struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
int i;
if (sz > exec->vtx.attrsz[attr]) {
/* New size is larger. Need to flush existing vertices and get
* an enlarged vertex format.
*/
vbo_exec_wrap_upgrade_vertex( exec, attr, sz );
}
else if (sz < exec->vtx.active_sz[attr]) {
static const GLfloat id[4] = { 0, 0, 0, 1 };
/* New size is smaller - just need to fill in some
* zeros. Don't need to flush or wrap.
*/
for (i = sz ; i <= exec->vtx.attrsz[attr] ; i++)
exec->vtx.attrptr[attr][i-1] = id[i-1];
}
exec->vtx.active_sz[attr] = sz;
/* Does setting NeedFlush belong here? Necessitates resetting
* vtxfmt on each flush (otherwise flags won't get reset
* afterwards).
*/
if (attr == 0)
exec->ctx->Driver.NeedFlush |= FLUSH_STORED_VERTICES;
}