Merge branch 'wlcore'

1 files changed, 221 insertions, 0 deletions

diff --git a/examples/rotation.c b/examples/rotation.c
new file mode 100644
index 00000000..1b75ccaf
--- /dev/null
+++ b/examples/rotation.c
@@ -0,0 +1,221 @@
+#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/backend.h>
+#include <wlr/session.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_surface *cat_texture;
+};
+
+struct output_data {
+	float x_offs, y_offs;
+	float x_vel, y_vel;
+};
+
+struct output_config {
+	char *name;
+	enum wl_output_transform transform;
+	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 output_data *odata = output->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];
+	for (int y = -128 + (int)odata->y_offs; y < height; y += 128) {
+		for (int x = -128 + (int)odata->x_offs; x < width; x += 128) {
+			wlr_surface_get_matrix(sample->cat_texture, &matrix,
+				&wlr_output->transform_matrix, x, y);
+			wlr_render_with_matrix(sample->renderer,
+					sample->cat_texture, &matrix);
+		}
+	}
+
+	wlr_renderer_end(sample->renderer);
+	wlr_output_swap_buffers(wlr_output);
+
+	long ms = (ts->tv_sec - output->last_frame.tv_sec) * 1000 +
+		(ts->tv_nsec - output->last_frame.tv_nsec) / 1000000;
+	float seconds = ms / 1000.0f;
+
+	odata->x_offs += odata->x_vel * seconds;
+	odata->y_offs += odata->y_vel * seconds;
+	if (odata->x_offs > 128) odata->x_offs = 0;
+	if (odata->y_offs > 128) odata->y_offs = 0;
+}
+
+static void handle_output_add(struct output_state *output) {
+	struct output_data *odata = calloc(1, sizeof(struct output_data));
+	odata->x_offs = odata->y_offs = 0;
+	odata->x_vel = odata->y_vel = 128;
+	output->data = odata;
+	struct sample_state *state = output->compositor->data;
+
+	struct output_config *conf;
+	wl_list_for_each(conf, &state->config, link) {
+		if (strcmp(conf->name, output->output->name) == 0) {
+			wlr_output_transform(output->output, conf->transform);
+			break;
+		}
+	}
+}
+
+static void handle_output_remove(struct output_state *output) {
+	free(output->data);
+}
+
+static void update_velocities(struct compositor_state *state,
+		float x_diff, float y_diff) {
+	struct output_state *output;
+	wl_list_for_each(output, &state->outputs, link) {
+		struct output_data *odata = output->data;
+		odata->x_vel += x_diff;
+		odata->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
+	if (key_state == WLR_KEY_PRESSED) {
+		switch (sym) {
+		case XKB_KEY_Left:
+			update_velocities(kbstate->compositor, -16, 0);
+			break;
+		case XKB_KEY_Right:
+			update_velocities(kbstate->compositor, 16, 0);
+			break;
+		case XKB_KEY_Up:
+			update_velocities(kbstate->compositor, 0, -16);
+			break;
+		case XKB_KEY_Down:
+			update_velocities(kbstate->compositor, 0, 16);
+			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"
+		" -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 sample_state state = { 0 };
+	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_remove_cb = handle_output_remove;
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+	compositor_init(&compositor);
+
+	state.renderer = wlr_gles2_renderer_init();
+	state.cat_texture = wlr_render_surface_init(state.renderer);
+	wlr_surface_attach_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_surface_destroy(state.cat_texture);
+	wlr_renderer_destroy(state.renderer);
+
+	struct output_config *ptr, *tmp;
+	wl_list_for_each_safe(ptr, tmp, &state.config, link) {
+		free(ptr);
+	}
+}