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-rw-r--r--examples/meson.build1
-rw-r--r--examples/output-layout.c276
2 files changed, 277 insertions, 0 deletions
diff --git a/examples/meson.build b/examples/meson.build
index 1ce9c342..e2c0189c 100644
--- a/examples/meson.build
+++ b/examples/meson.build
@@ -7,6 +7,7 @@ executable('rotation', 'rotation.c', dependencies: wlroots, link_with: lib_share
executable('pointer', 'pointer.c', dependencies: wlroots, link_with: lib_shared)
executable('touch', 'touch.c', dependencies: wlroots, link_with: lib_shared)
executable('tablet', 'tablet.c', dependencies: wlroots, link_with: lib_shared)
+executable('output-layout', 'output-layout.c', dependencies: wlroots, link_with: lib_shared)
compositor_src = [
'compositor/main.c',
diff --git a/examples/output-layout.c b/examples/output-layout.c
new file mode 100644
index 00000000..f0e2d2d4
--- /dev/null
+++ b/examples/output-layout.c
@@ -0,0 +1,276 @@
+#define _POSIX_C_SOURCE 199309L
+#define _XOPEN_SOURCE 500
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <wayland-server.h>
+#include <wayland-server-protocol.h>
+#include <xkbcommon/xkbcommon.h>
+#include <GLES2/gl2.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles2.h>
+#include <wlr/render.h>
+#include <wlr/util/log.h>
+#include <wlr/backend.h>
+#include <wlr/backend/session.h>
+#include <wlr/types/wlr_output_layout.h>
+#include <wlr/types/wlr_output.h>
+#include <wlr/types/wlr_keyboard.h>
+#include <math.h>
+#include "shared.h"
+#include "cat.h"
+
+struct sample_state {
+ struct wl_list config;
+ struct wlr_renderer *renderer;
+ struct wlr_texture *cat_texture;
+ struct wlr_output_layout *layout;
+ float x_offs, y_offs;
+ float x_vel, y_vel;
+ struct wlr_output *main_output;
+};
+
+struct output_config {
+ char *name;
+ enum wl_output_transform transform;
+ int x, y;
+ struct wl_list link;
+};
+
+static void handle_output_frame(struct output_state *output, struct timespec *ts) {
+ struct compositor_state *state = output->compositor;
+ struct sample_state *sample = state->data;
+ struct wlr_output *wlr_output = output->output;
+
+ int32_t width, height;
+ wlr_output_effective_resolution(wlr_output, &width, &height);
+
+ wlr_output_make_current(wlr_output);
+ wlr_renderer_begin(sample->renderer, wlr_output);
+
+ float matrix[16];
+
+ // transform global coordinates to local coordinates
+ int local_x = sample->x_offs;
+ int local_y = sample->y_offs;
+
+ wlr_output_layout_output_coords(sample->layout, output->output, &local_x,
+ &local_y);
+
+ wlr_texture_get_matrix(sample->cat_texture, &matrix,
+ &wlr_output->transform_matrix, local_x, local_y);
+ wlr_render_with_matrix(sample->renderer,
+ sample->cat_texture, &matrix);
+
+ wlr_renderer_end(sample->renderer);
+ wlr_output_swap_buffers(wlr_output);
+
+ if (output->output == sample->main_output) {
+ long ms = (ts->tv_sec - output->last_frame.tv_sec) * 1000 +
+ (ts->tv_nsec - output->last_frame.tv_nsec) / 1000000;
+ // how many seconds have passed since the last frame
+ float seconds = ms / 1000.0f;
+
+ // check for collisions and bounce
+ bool ur_collision = !wlr_output_layout_output_at(sample->layout,
+ sample->x_offs + 128, sample->y_offs);
+ bool ul_collision = !wlr_output_layout_output_at(sample->layout,
+ sample->x_offs, sample->y_offs);
+ bool ll_collision = !wlr_output_layout_output_at(sample->layout,
+ sample->x_offs, sample->y_offs + 128);
+ bool lr_collision = !wlr_output_layout_output_at(sample->layout,
+ sample->x_offs + 128, sample->y_offs + 128);
+ bool has_double_collision = false;
+
+ if ((ur_collision && ul_collision) || (lr_collision && ll_collision)) {
+ sample->y_vel *= -1;
+ has_double_collision = true;
+ }
+
+ if ((ll_collision && ul_collision) || (ur_collision && lr_collision)) {
+ sample->x_vel *= -1;
+ has_double_collision = true;
+ }
+
+ if (!has_double_collision &&
+ (ur_collision || ul_collision || lr_collision || ll_collision)) {
+ sample->x_vel *= -1;
+ sample->y_vel *= -1;
+ }
+
+ sample->x_offs += sample->x_vel * seconds;
+ sample->y_offs += sample->y_vel * seconds;
+ }
+}
+
+static void handle_output_add(struct output_state *output) {
+ struct sample_state *sample = output->compositor->data;
+
+ struct output_config *conf;
+ wl_list_for_each(conf, &sample->config, link) {
+ if (strcmp(conf->name, output->output->name) == 0) {
+ wlr_output_layout_add(sample->layout, output->output,
+ conf->x, conf->y);
+ wlr_output_transform(output->output, conf->transform);
+
+ if (!sample->main_output) {
+ sample->main_output = output->output;
+ sample->x_offs = conf->x + 20;
+ sample->y_offs = conf->y + 20;
+ sample->x_vel = 500;
+ sample->y_vel = 500;
+ }
+ wlr_log(L_DEBUG, "Adding output to layout: %s", output->output->name);
+ }
+
+ }
+}
+
+static void update_velocities(struct compositor_state *state,
+ float x_diff, float y_diff) {
+ struct sample_state *sample = state->data;
+ sample->x_vel += x_diff;
+ sample->y_vel += y_diff;
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+ xkb_keysym_t sym, enum wlr_key_state key_state) {
+ // NOTE: It may be better to simply refer to our key state during each frame
+ // and make this change in pixels/sec^2
+ // Also, key repeat
+ int delta = 75;
+ if (key_state == WLR_KEY_PRESSED) {
+ switch (sym) {
+ case XKB_KEY_Left:
+ update_velocities(kbstate->compositor, -delta, 0);
+ break;
+ case XKB_KEY_Right:
+ update_velocities(kbstate->compositor, delta, 0);
+ break;
+ case XKB_KEY_Up:
+ update_velocities(kbstate->compositor, 0, -delta);
+ break;
+ case XKB_KEY_Down:
+ update_velocities(kbstate->compositor, 0, delta);
+ break;
+ }
+ }
+}
+
+static void usage(const char *name, int ret) {
+ fprintf(stderr,
+ "usage: %s [-d <name> [-r <rotation> | -f]]*\n"
+ "\n"
+ " -o <output> The name of the DRM display. e.g. DVI-I-1.\n"
+ " -r <rotation> The rotation counter clockwise. Valid values are 90, 180, 270.\n"
+ " -x <position> The X-axis coordinate position of this output in the layout.\n"
+ " -y <position> The Y-axis coordinate position of this output in the layout.\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:x:y: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 'x':
+ if (!oc) {
+ fprintf(stderr, "You must specify an output first\n");
+ usage(argv[0], 1);
+ }
+ oc->x = strtol(optarg, NULL, 0);
+ break;
+ case 'y':
+ if (!oc) {
+ fprintf(stderr, "You must specify an output first\n");
+ usage(argv[0], 1);
+ }
+ oc->y = strtol(optarg, NULL, 0);
+ 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 sample_state state = {0};
+
+ state.layout = wlr_output_layout_init();
+
+ wl_list_init(&state.config);
+ parse_args(argc, argv, &state.config);
+
+ struct compositor_state compositor = { 0 };
+ compositor.data = &state;
+ compositor.output_add_cb = handle_output_add;
+ compositor.output_frame_cb = handle_output_frame;
+ compositor.keyboard_key_cb = handle_keyboard_key;
+ compositor_init(&compositor);
+
+ state.renderer = wlr_gles2_renderer_init(compositor.backend);
+ state.cat_texture = wlr_render_texture_init(state.renderer);
+ wlr_texture_upload_pixels(state.cat_texture, WL_SHM_FORMAT_ABGR8888,
+ cat_tex.width, cat_tex.width, cat_tex.height, cat_tex.pixel_data);
+
+ compositor_run(&compositor);
+
+ wlr_texture_destroy(state.cat_texture);
+ wlr_renderer_destroy(state.renderer);
+
+ wlr_output_layout_destroy(state.layout);
+
+ struct output_config *ptr, *tmp;
+ wl_list_for_each_safe(ptr, tmp, &state.config, link) {
+ free(ptr);
+ }
+}
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