1 files changed, 132 insertions, 0 deletions
diff --git a/example/pointer.c b/example/pointer.c
new file mode 100644
index 00000000..d97d253e
--- /dev/null
+++ b/example/pointer.c
@@ -0,0 +1,132 @@
+#define _POSIX_C_SOURCE 199309L
+#define _XOPEN_SOURCE 500
+#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 <xkbcommon/xkbcommon.h>
+#include <GLES3/gl3.h>
+#include <wlr/render/matrix.h>
+#include <wlr/render/gles3.h>
+#include <wlr/render.h>
+#include <wlr/backend.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <math.h>
+#include "shared.h"
+#include "cat.h"
+
+struct sample_state {
+	struct wlr_renderer *renderer;
+	struct wlr_surface *cat_texture;
+	int cur_x, cur_y;
+	float default_color[4];
+	float clear_color[4];
+};
+
+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;
+
+	wlr_renderer_begin(sample->renderer, wlr_output);
+	glClearColor(sample->clear_color[0], sample->clear_color[1],
+			sample->clear_color[2], sample->clear_color[3]);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	float matrix[16];
+	wlr_surface_get_matrix(sample->cat_texture, &matrix,
+		&wlr_output->transform_matrix, sample->cur_x, sample->cur_y);
+	wlr_render_with_matrix(sample->renderer,
+			sample->cat_texture, &matrix);
+
+	wlr_renderer_end(sample->renderer);
+}
+
+static void handle_keyboard_key(struct keyboard_state *kbstate,
+		xkb_keysym_t sym, enum wlr_key_state key_state) {
+	if (sym == XKB_KEY_Escape) {
+		kbstate->compositor->exit = true;
+	}
+}
+
+static void handle_pointer_motion(struct pointer_state *pstate,
+		double d_x, double d_y) {
+	struct sample_state *state = pstate->compositor->data;
+	state->cur_x += d_x;
+	state->cur_y += d_y;
+}
+
+static void handle_pointer_button(struct pointer_state *pstate,
+		uint32_t button, enum wlr_button_state state) {
+	struct sample_state *sample = pstate->compositor->data;
+	float (*color)[4];
+	if (state == WLR_BUTTON_RELEASED) {
+		color = &sample->default_color;
+	} else {
+		float red[4] = { 0.25f, 0.25f, 0.25f, 1 };
+		red[button % 3] = 1;
+		color = &red;
+	}
+	memcpy(&sample->clear_color, color, sizeof(*color));
+}
+
+static void handle_pointer_axis(struct pointer_state *pstate,
+	enum wlr_axis_source source,
+	enum wlr_axis_orientation orientation,
+	double delta) {
+	struct sample_state *sample = pstate->compositor->data;
+	for (size_t i = 0; i < 3; ++i) {
+		sample->default_color[i] += delta > 0 ? -0.05f : 0.05f;
+		if (sample->default_color[i] > 1.0f) {
+			sample->default_color[i] = 1.0f;
+		}
+		if (sample->default_color[i] < 0.0f) {
+			sample->default_color[i] = 0.0f;
+		}
+	}
+	memcpy(&sample->clear_color, &sample->default_color,
+			sizeof(sample->clear_color));
+}
+
+static void handle_output_add(struct output_state *ostate) {
+	struct wlr_output *wlr_output = ostate->output;
+	if (!wlr_output_set_cursor(wlr_output, cat_tex.pixel_data,
+			cat_tex.width * 4, cat_tex.width, cat_tex.height)) {
+		fprintf(stderr, "Failed to set cursor\n");
+		return;
+	}
+	if (!wlr_output_move_cursor(wlr_output, 0, 0)) {
+		fprintf(stderr, "Failed to move cursor\n");
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct sample_state state = {
+		.default_color = { 0.25f, 0.25f, 0.25f, 1 },
+		.clear_color = { 0.25f, 0.25f, 0.25f, 1 }
+	};
+	struct compositor_state compositor;
+
+	compositor_init(&compositor);
+	compositor.output_add_cb = handle_output_add;
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+	compositor.pointer_motion_cb = handle_pointer_motion;
+	compositor.pointer_button_cb = handle_pointer_button;
+	compositor.pointer_axis_cb = handle_pointer_axis;
+
+	state.renderer = wlr_gles3_renderer_init();
+	state.cat_texture = wlr_render_surface_init(state.renderer);
+	wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
+		cat_tex.width, cat_tex.height, cat_tex.pixel_data);
+
+	compositor.data = &state;
+	compositor_run(&compositor);
+
+	wlr_surface_destroy(state.cat_texture);
+	wlr_renderer_destroy(state.renderer);
+}