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