Add colored quad and ellipse rendering primitives

1 files changed, 63 insertions, 0 deletions

diff --git a/example/tablet.c b/example/tablet.c
new file mode 100644
index 00000000..9a498438
--- /dev/null
+++ b/example/tablet.c
@@ -0,0 +1,63 @@
+#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;
+};
+
+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);
+
+	float matrix[16];
+	float color[4] = { 0, 1.0, 0, 1.0 };
+	wlr_matrix_scale(&matrix, 128, 128, 1);
+	wlr_matrix_mul(&wlr_output->transform_matrix, &matrix, &matrix);
+	wlr_render_colored_ellipse(sample->renderer, &color, &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;
+	}
+}
+
+int main(int argc, char *argv[]) {
+	struct sample_state state = { 0 };
+	struct compositor_state compositor;
+
+	compositor_init(&compositor);
+	compositor.output_frame_cb = handle_output_frame;
+	compositor.keyboard_key_cb = handle_keyboard_key;
+
+	state.renderer = wlr_gles3_renderer_init();
+
+	compositor.data = &state;
+	compositor_run(&compositor);
+
+	wlr_renderer_destroy(state.renderer);
+}