diff options
Diffstat (limited to 'examples/touch.c')
-rw-r--r-- | examples/touch.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/examples/touch.c b/examples/touch.c new file mode 100644 index 00000000..aca86739 --- /dev/null +++ b/examples/touch.c @@ -0,0 +1,116 @@ +#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 <stdint.h> +#include <math.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/util/list.h> +#include "shared.h" +#include "cat.h" + +struct sample_state { + struct wlr_renderer *renderer; + struct wlr_surface *cat_texture; + list_t *touch_points; +}; + +struct touch_point { + int32_t slot; + double x, y; +}; + +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]; + for (size_t i = 0; i < sample->touch_points->length; ++i) { + struct touch_point *p = sample->touch_points->items[i]; + wlr_surface_get_matrix(sample->cat_texture, &matrix, + &wlr_output->transform_matrix, + (int)(p->x * width) - sample->cat_texture->width / 2, + (int)(p->y * height) - sample->cat_texture->height / 2); + wlr_render_with_matrix(sample->renderer, + sample->cat_texture, &matrix); + } + + wlr_renderer_end(sample->renderer); + wlr_output_swap_buffers(wlr_output); +} + +static void handle_touch_down(struct touch_state *tstate, int32_t slot, + double x, double y, double width, double height) { + struct sample_state *sample = tstate->compositor->data; + struct touch_point *point = calloc(1, sizeof(struct touch_state)); + point->slot = slot; + point->x = x / width; + point->y = y / height; + list_add(sample->touch_points, point); +} + +static void handle_touch_up(struct touch_state *tstate, int32_t slot) { + struct sample_state *sample = tstate->compositor->data; + for (size_t i = 0; i < sample->touch_points->length; ++i) { + struct touch_point *point = sample->touch_points->items[i]; + if (point->slot == slot) { + list_del(sample->touch_points, i); + break; + } + } +} + +static void handle_touch_motion(struct touch_state *tstate, int32_t slot, + double x, double y, double width, double height) { + struct sample_state *sample = tstate->compositor->data; + for (size_t i = 0; i < sample->touch_points->length; ++i) { + struct touch_point *point = sample->touch_points->items[i]; + if (point->slot == slot) { + point->x = x / width; + point->y = y / height; + break; + } + } +} + +int main(int argc, char *argv[]) { + struct sample_state state = { + .touch_points = list_create() + }; + struct compositor_state compositor = { 0, + .data = &state, + .output_frame_cb = handle_output_frame, + .touch_down_cb = handle_touch_down, + .touch_up_cb = handle_touch_up, + .touch_motion_cb = handle_touch_motion, + }; + 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, GL_RGBA, + 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); +} |