modules/roto: trivial simplification of render loop

Maybe earlier versions used the absolute coordinates in the
frame, but the current code doesn't make use of this and simply
needs to confine itself into the WxH of the fragment.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/modules/roto/roto.c b/src/modules/roto/roto.c
index 322b967..8564870 100644
--- a/src/modules/roto/roto.c
+++ b/src/modules/roto/roto.c
@@ -213,7 +213,7 @@ static void roto_render_fragment(til_module_context_t *context, til_stream_t *st
 	roto_context_t		*ctxt = (roto_context_t *)context;
 	til_fb_fragment_t	*fragment = *fragment_ptr;
 
-	int		x, y, frame_width = fragment->frame_width, frame_height = fragment->frame_height;
+	int		frame_width = fragment->frame_width, frame_height = fragment->frame_height;
 	int		y_cos_r, y_sin_r, x_cos_r, x_sin_r, x_cos_r_init, x_sin_r_init, cos_r, sin_r;
 	uint32_t	*buf = fragment->buf;
 
@@ -230,12 +230,12 @@ static void roto_render_fragment(til_module_context_t *context, til_stream_t *st
 	y_cos_r = FIXED_MULT(-FIXED_NEW(frame_height / 2) + FIXED_NEW(fragment->y), cos_r);
 	y_sin_r = FIXED_MULT(-FIXED_NEW(frame_height / 2) + FIXED_NEW(fragment->y), sin_r);
 
-	for (y = fragment->y; y < fragment->y + fragment->height; y++) {
+	for (int y = 0; y < fragment->height; y++) {
 
 		x_cos_r = x_cos_r_init;
 		x_sin_r = x_sin_r_init;
 
-		for (x = fragment->x; x < fragment->x + fragment->width; x++, buf++) {
+		for (int x = 0; x < fragment->width; x++, buf++) {
 			*buf = bilerp_color(texture, ctxt->palette, x_sin_r - y_cos_r, y_sin_r + x_cos_r);
 
 			x_cos_r += cos_r;