void
scrolling_1 (struct frame *frame, int window_size, int unchanged_at_top,
int unchanged_at_bottom, int *draw_cost, int *old_draw_cost,
unsigned *old_hash, unsigned *new_hash, int free_at_end)
{
USE_SAFE_ALLOCA;
struct matrix_elt *matrix;
SAFE_NALLOCA (matrix, window_size + 1, window_size + 1);
if (FRAME_SCROLL_REGION_OK (frame))
{
calculate_direct_scrolling (frame, matrix, window_size,
unchanged_at_bottom,
draw_cost, old_draw_cost,
old_hash, new_hash, free_at_end);
do_direct_scrolling (frame, frame->current_matrix,
matrix, window_size, unchanged_at_top);
}
else
{
calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom,
draw_cost, old_hash, new_hash,
free_at_end);
do_scrolling (frame,
frame->current_matrix, matrix, window_size,
unchanged_at_top);
}
SAFE_FREE ();
}
void
scrolling_1 (struct frame *frame, int window_size, int unchanged_at_top,
int unchanged_at_bottom, int *draw_cost, int *old_draw_cost,
int *old_hash, int *new_hash, int free_at_end)
{
struct matrix_elt *matrix
= alloca ((window_size + 1) * (window_size + 1) * sizeof *matrix);
if (FRAME_SCROLL_REGION_OK (frame))
{
calculate_direct_scrolling (frame, matrix, window_size,
unchanged_at_bottom,
draw_cost, old_draw_cost,
old_hash, new_hash, free_at_end);
do_direct_scrolling (frame, frame->current_matrix,
matrix, window_size, unchanged_at_top);
}
else
{
calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom,
draw_cost, old_hash, new_hash,
free_at_end);
do_scrolling (frame,
frame->current_matrix, matrix, window_size,
unchanged_at_top);
}
}
