wlroots-hyprland/example/rotation.c

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#define _POSIX_C_SOURCE 199309L
#define _XOPEN_SOURCE 500
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <wayland-server.h>
#include <wayland-server-protocol.h>
#include <GLES3/gl3.h>
#include <wlr/render/matrix.h>
#include <wlr/render/gles3.h>
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#include <wlr/render.h>
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#include <wlr/backend.h>
#include <wlr/session.h>
#include <wlr/types.h>
#include <math.h>
#include "cat.h"
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struct state {
struct wl_listener output_add;
struct wl_listener output_remove;
struct wl_list outputs;
struct wl_list config;
struct wlr_renderer *renderer;
struct wlr_surface *cat_texture;
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};
struct output_state {
struct timespec last_frame;
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struct wl_list link;
struct wlr_output *output;
struct state *state;
struct wl_listener frame;
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float x_offs, y_offs;
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};
struct output_config {
char *name;
enum wl_output_transform transform;
struct wl_list link;
};
static void output_frame(struct wl_listener *listener, void *data) {
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struct output_state *ostate = wl_container_of(listener, ostate, frame);
struct wlr_output *output = ostate->output;
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struct state *s = ostate->state;
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int32_t width, height;
wlr_output_effective_resolution(output, &width, &height);
wlr_renderer_begin(s->renderer, output);
float matrix[16];
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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, x, y);
wlr_render_with_matrix(s->renderer, s->cat_texture, &matrix);
}
}
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wlr_renderer_end(s->renderer);
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struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
long ms = (now.tv_sec - ostate->last_frame.tv_sec) * 1000 +
(now.tv_nsec - ostate->last_frame.tv_nsec) / 1000000;
float seconds = ms / 1000.0f;
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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;
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}
static void output_add(struct wl_listener *listener, void *data) {
struct wlr_output *output = data;
struct state *state = wl_container_of(listener, state, output_add);
fprintf(stderr, "Output '%s' added\n", output->name);
wlr_output_set_mode(output, output->modes->items[0]);
struct output_state *ostate = calloc(1, sizeof(struct output_state));
clock_gettime(CLOCK_MONOTONIC, &ostate->last_frame);
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ostate->output = output;
ostate->state = state;
ostate->frame.notify = output_frame;
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ostate->x_offs = ostate->y_offs = 0;
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struct output_config *conf;
wl_list_for_each(conf, &state->config, link) {
if (strcmp(conf->name, output->name) == 0) {
wlr_output_transform(ostate->output, conf->transform);
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break;
}
}
wl_list_init(&ostate->frame.link);
wl_signal_add(&output->events.frame, &ostate->frame);
wl_list_insert(&state->outputs, &ostate->link);
}
static void output_remove(struct wl_listener *listener, void *data) {
struct wlr_output *output = data;
struct state *state = wl_container_of(listener, state, output_remove);
struct output_state *ostate;
wl_list_for_each(ostate, &state->outputs, link) {
if (ostate->output == output) {
wl_list_remove(&ostate->link);
wl_list_remove(&ostate->frame.link);
free(ostate);
break;
}
}
}
static int timer_done(void *data) {
*(bool *)data = true;
return 1;
}
static void usage(const char *name, int ret) {
fprintf(stderr,
"usage: %s [-d <name> [-r <rotation> | -f]]*\n"
"\n"
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" -o <output> The name of the DRM display. e.g. DVI-I-1.\n"
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" -r <rotation> The rotation counter clockwise. Valid values are 90, 180, 270.\n"
" -f Flip the output along the vertical axis.\n", name);
exit(ret);
}
static void parse_args(int argc, char *argv[], struct wl_list *config) {
struct output_config *oc = NULL;
int c;
while ((c = getopt(argc, argv, "o:r:fh")) != -1) {
switch (c) {
case 'o':
oc = calloc(1, sizeof(*oc));
oc->name = optarg;
oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
wl_list_insert(config, &oc->link);
break;
case 'r':
if (!oc) {
fprintf(stderr, "You must specify an output first\n");
usage(argv[0], 1);
}
if (oc->transform != WL_OUTPUT_TRANSFORM_NORMAL
&& oc->transform != WL_OUTPUT_TRANSFORM_FLIPPED) {
fprintf(stderr, "Rotation for %s already specified\n", oc->name);
usage(argv[0], 1);
}
if (strcmp(optarg, "90") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_90;
} else if (strcmp(optarg, "180") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_180;
} else if (strcmp(optarg, "270") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_270;
} else {
fprintf(stderr, "Invalid rotation '%s'\n", optarg);
usage(argv[0], 1);
}
break;
case 'f':
if (!oc) {
fprintf(stderr, "You must specify an output first\n");
usage(argv[0], 1);
}
if (oc->transform >= WL_OUTPUT_TRANSFORM_FLIPPED) {
fprintf(stderr, "Flip for %s already specified\n", oc->name);
usage(argv[0], 1);
}
oc->transform += WL_OUTPUT_TRANSFORM_FLIPPED;
break;
case 'h':
case '?':
usage(argv[0], c != 'h');
}
}
}
int main(int argc, char *argv[]) {
struct state state = {
.output_add = { .notify = output_add },
.output_remove = { .notify = output_remove }
};
wl_list_init(&state.outputs);
wl_list_init(&state.config);
wl_list_init(&state.output_add.link);
wl_list_init(&state.output_remove.link);
parse_args(argc, argv, &state.config);
struct wl_display *display = wl_display_create();
struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
struct wlr_session *session = wlr_session_start(display);
if (!session) {
return 1;
}
struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
if (!wlr) {
return 1;
}
wl_signal_add(&wlr->events.output_add, &state.output_add);
wl_signal_add(&wlr->events.output_remove, &state.output_remove);
if (!wlr_backend_init(wlr)) {
printf("Failed to initialize backend, bailing out\n");
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return 1;
}
state.renderer = wlr_gles3_renderer_init();
state.cat_texture = wlr_render_surface_init(state.renderer);
wlr_surface_attach_pixels(state.cat_texture, GL_RGB,
cat_tex.width, cat_tex.height, cat_tex.pixel_data);
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bool done = false;
struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
timer_done, &done);
wl_event_source_timer_update(timer, 30000);
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while (!done) {
wl_event_loop_dispatch(event_loop, 0);
}
wl_event_source_remove(timer);
wlr_backend_destroy(wlr);
wlr_session_finish(session);
wlr_surface_destroy(state.cat_texture);
wlr_renderer_destroy(state.renderer);
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wl_display_destroy(display);
struct output_config *ptr, *tmp;
wl_list_for_each_safe(ptr, tmp, &state.config, link) {
free(ptr);
}
}