Spice up the example program a bit
@@ -32,8 +32,7 @@ struct output_state {
struct wlr_output *output;
struct state *state;
struct wl_listener frame;
- float x, y;
- float vel_x, vel_y;
+ float x_offs, y_offs;
};
struct output_config {
@@ -47,12 +46,19 @@ static void output_frame(struct wl_listener *listener, void *data) {
struct wlr_output *output = ostate->output;
struct state *s = ostate->state;
+ int32_t width, height;
+ wlr_output_effective_resolution(output, &width, &height);
+
wlr_renderer_begin(s->renderer, output);
float matrix[16];
+ for (int y = -128 + (int)ostate->y_offs; y < height; y += 128) {
+ for (int x = -128 + (int)ostate->x_offs; x < width; x += 128) {
wlr_surface_get_matrix(s->cat_texture, &matrix,
- &output->transform_matrix, ostate->x, ostate->y);
+ &output->transform_matrix, x, y);
wlr_render_with_matrix(s->renderer, s->cat_texture, &matrix);
+ }
+ }
wlr_renderer_end(s->renderer);
@@ -62,18 +68,10 @@ static void output_frame(struct wl_listener *listener, void *data) {
(now.tv_nsec - ostate->last_frame.tv_nsec) / 1000000;
float seconds = ms / 1000.0f;
- int32_t width, height;
- wlr_output_effective_resolution(output, &width, &height);
- ostate->x += ostate->vel_x * seconds;
- ostate->y += ostate->vel_y * seconds;
- if (ostate->y > height - 128) {
- ostate->vel_y = -ostate->vel_y;
- } else {
- ostate->vel_y += 50 * seconds;
- }
- if (ostate->x > width - 128 || ostate->x < 0) {
- ostate->vel_x = -ostate->vel_x;
- }
+ ostate->x_offs += 128 * seconds;
+ ostate->y_offs += 128 * seconds;
+ if (ostate->x_offs > 128) ostate->x_offs = 0;
+ if (ostate->y_offs > 128) ostate->y_offs = 0;
ostate->last_frame = now;
}
@@ -90,9 +88,7 @@ static void output_add(struct wl_listener *listener, void *data) {
ostate->output = output;
ostate->state = state;
ostate->frame.notify = output_frame;
- ostate->x = ostate->y = 0;
- ostate->vel_x = 100;
- ostate->vel_y = 0;
+ ostate->x_offs = ostate->y_offs = 0;
struct output_config *conf;
wl_list_for_each(conf, &state->config, link) {
