static int get_layer_ops_next(blit_hregion_t *hregion, int subregion, int l)
{
while (++l < hregion->nlayers) {
if (!empty_rect(&hregion->blitrects[l][subregion]))
return l;
}
return -1;
}
static int get_top_rect(blit_hregion_t *hregion, int subregion, blit_rect_t **routp)
{
int l = hregion->nlayers - 1;
do {
*routp = &hregion->blitrects[l][subregion];
if (!empty_rect(*routp))
break;
}
while (--l >= 0);
return l;
}
/*!
empties a clipping region.
*/
void gdi_empty_cliprgn(cliprgn_t *p_rgn)
{
cliprc_t *p_rc = NULL, *p_tmp = NULL;
p_rc = p_rgn->p_head;
while(NULL != p_rc)
{
p_tmp = p_rc->p_next;
gdi_free_cliprect(p_rgn->p_heap, p_rc);
p_rc = p_tmp;
}
empty_rect(&p_rgn->bound);
p_rgn->p_head = p_rgn->p_tail = NULL;
}
/*
* The idea here is that we walk the layers from front to back and count the
* number of layers in the hregion until the first layer which doesn't require
* blending.
*/
static int get_layer_ops(blit_hregion_t *hregion, int subregion, int *bottom)
{
int l = hregion->nlayers - 1;
int ops = 0;
*bottom = -1;
do {
if (!empty_rect(&hregion->blitrects[l][subregion])) {
ops++;
*bottom = l;
hwc_layer_1_t *layer = hregion->layers[l];
IMG_native_handle_t *h = (IMG_native_handle_t *)layer->handle;
if ((layer->blending != HWC_BLENDING_PREMULT) || is_OPAQUE(h->iFormat))
break;
}
}
while (--l >= 0);
return ops;
}
/*!
initializes a clipping region.
*/
void gdi_init_cliprgn(cliprgn_t *p_rgn, lib_memf_t *p_heap)
{
empty_rect(&p_rgn->bound);
p_rgn->p_head = p_rgn->p_tail = NULL;
p_rgn->p_heap = p_heap;
}
