| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <math.h> |
| #include <cairo.h> |
| #include <glib.h> |
| |
| #include "wayland-client.h" |
| #include "wayland-glib.h" |
| |
| #include "cairo-util.h" |
| |
| static const char gem_device[] = "/dev/dri/card0"; |
| static const char socket_name[] = "\0wayland"; |
| |
| static void |
| pointer_path(cairo_t *cr, int x, int y) |
| { |
| const int end = 4, tx = 2, ty = 7, dx = 3, dy = 5; |
| const int width = 16, height = 16; |
| |
| cairo_move_to(cr, x, y); |
| cairo_line_to(cr, x + tx, y + ty); |
| cairo_line_to(cr, x + dx, y + dy); |
| cairo_line_to(cr, x + width - end, y + height); |
| cairo_line_to(cr, x + width, y + height - end); |
| cairo_line_to(cr, x + dy, y + dx); |
| cairo_line_to(cr, x + ty, y + tx); |
| cairo_close_path(cr); |
| } |
| |
| static void * |
| draw_pointer(int width, int height) |
| { |
| const int hotspot_x = 16, hotspot_y = 16; |
| cairo_surface_t *surface; |
| cairo_t *cr; |
| |
| surface = cairo_image_surface_create(CAIRO_FORMAT_RGB24, |
| width, height); |
| |
| cr = cairo_create(surface); |
| pointer_path(cr, hotspot_x + 3, hotspot_y + 2); |
| cairo_set_line_width (cr, 2); |
| cairo_set_source_rgb(cr, 0, 0, 0); |
| cairo_stroke_preserve(cr); |
| cairo_fill(cr); |
| blur_surface(surface, INT_MAX); |
| |
| pointer_path(cr, hotspot_x, hotspot_y); |
| cairo_stroke_preserve(cr); |
| cairo_set_source_rgb(cr, 1, 1, 1); |
| cairo_fill(cr); |
| cairo_destroy(cr); |
| |
| return surface; |
| } |
| |
| struct pointer { |
| int width, height; |
| struct wl_surface *surface; |
| }; |
| |
| static void |
| event_handler(struct wl_display *display, |
| uint32_t opcode, |
| uint32_t arg1, uint32_t arg2, void *data) |
| { |
| struct pointer *pointer = data; |
| |
| if (opcode == 0) |
| wl_surface_map(pointer->surface, arg1, arg2, pointer->width, pointer->height); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| struct wl_display *display; |
| struct pointer pointer; |
| int fd; |
| cairo_surface_t *s; |
| GMainLoop *loop; |
| GSource *source; |
| struct buffer *buffer; |
| |
| fd = open(gem_device, O_RDWR); |
| if (fd < 0) { |
| fprintf(stderr, "drm open failed: %m\n"); |
| return -1; |
| } |
| |
| display = wl_display_create(socket_name); |
| if (display == NULL) { |
| fprintf(stderr, "failed to create display: %m\n"); |
| return -1; |
| } |
| |
| loop = g_main_loop_new(NULL, FALSE); |
| source = wayland_source_new(display); |
| g_source_attach(source, NULL); |
| |
| pointer.width = 48; |
| pointer.height = 48; |
| pointer.surface = wl_display_create_surface(display); |
| |
| s = draw_pointer(pointer.width, pointer.height); |
| buffer = buffer_create_from_cairo_surface(fd, s); |
| |
| wl_surface_attach(pointer.surface, buffer->name, |
| buffer->width, buffer->height, buffer->stride); |
| wl_surface_map(pointer.surface, 512, 384, pointer.width, pointer.height); |
| |
| wl_display_set_event_handler(display, event_handler, &pointer); |
| |
| g_main_loop_run(loop); |
| |
| return 0; |
| } |