wlroots/types/wlr_region.c

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#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <wayland-server.h>
#include <pixman.h>
static void region_add(struct wl_client *client, struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height) {
pixman_region32_t *region = wl_resource_get_user_data(resource);
pixman_region32_union_rect(region, region, x, y, width, height);
}
static void region_subtract(struct wl_client *client, struct wl_resource *resource,
int32_t x, int32_t y, int32_t width, int32_t height) {
pixman_region32_t *region = wl_resource_get_user_data(resource);
pixman_region32_union_rect(region, region, x, y, width, height);
pixman_region32_t rect;
pixman_region32_init_rect(&rect, x, y, width, height);
pixman_region32_subtract(region, region, &rect);
pixman_region32_fini(&rect);
}
static void region_destroy(struct wl_client *client, struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static const struct wl_region_interface region_interface = {
.destroy = region_destroy,
.add = region_add,
.subtract = region_subtract,
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};
static void destroy_region(struct wl_resource *resource) {
pixman_region32_t *reg = wl_resource_get_user_data(resource);
pixman_region32_fini(reg);
free(reg);
}
void wlr_region_create(struct wl_client *client, struct wl_resource *res,
uint32_t id) {
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pixman_region32_t *region = calloc(1, sizeof(pixman_region32_t));
if (region == NULL) {
wl_resource_post_no_memory(res);
return;
}
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pixman_region32_init(region);
struct wl_resource *region_resource = wl_resource_create(client,
&wl_region_interface, 1, id);
if (region_resource == NULL) {
free(region);
wl_resource_post_no_memory(res);
return;
}
wl_resource_set_implementation(region_resource, &region_interface, region,
destroy_region);
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}