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#include <wayland-client.h>
#include <sys/mman.h>
#include <unistd.h>
#include "drw.h"
#include "shm_open.h"
void
drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h, uint32_t s) {
if (ds->buf) {
munmap(ds->pool_data, ds->size);
wl_buffer_destroy(ds->buf);
ds->buf = NULL;
}
ds->scale = s;
ds->width = w * s;
ds->height = h * s;
setup_buffer(ds);
}
static void surface_frame_callback(void *data, struct wl_callback *cb,
uint32_t time);
static struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
void
drwsurf_flip(struct drwsurf *ds) {
struct wl_callback *cb = wl_surface_frame(ds->surf);
wl_callback_add_listener(cb, &frame_listener, (void *)ds);
wl_surface_attach(ds->surf, ds->buf, 0, 0);
wl_surface_set_buffer_scale(ds->surf, ds->scale);
wl_surface_commit(ds->surf);
}
void
surface_frame_callback(void *data, struct wl_callback *cb, uint32_t time) {
struct drwsurf *ds = (struct drwsurf *)data;
wl_callback_destroy(cb);
drwsurf_flip(ds);
}
void
drw_draw_text(struct drwsurf *d, Color color,
uint32_t x, uint32_t y,
uint32_t w, uint32_t h,
const char *label) {
cairo_save(d->cairo);
cairo_set_source_rgba (
d->cairo,
color.bgra[2] / (double)255,
color.bgra[1] / (double)255,
color.bgra[0] / (double)255,
color.bgra[3] / (double)255
);
cairo_move_to(d->cairo, x + (double)w / 2.0, y + (double)h / 2.0);
pango_layout_set_text(d->layout, label, -1);
int width, height;
pango_layout_get_size(d->layout, &width, &height);
cairo_rel_move_to(d->cairo, - ((double)width / PANGO_SCALE) / 2, - ((double)height / PANGO_SCALE) / 2);
pango_cairo_show_layout(d->cairo, d->layout);
cairo_restore(d->cairo);
wl_surface_damage(d->surf, x, y, w, h);
}
void
drw_fill_rectangle(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
uint32_t w, uint32_t h) {
cairo_save(d->cairo);
cairo_set_operator(d->cairo, CAIRO_OPERATOR_SOURCE);
cairo_rectangle(d->cairo, x, y, w, h);
cairo_set_source_rgba(
d->cairo,
color.bgra[2] / (double)255,
color.bgra[1] / (double)255,
color.bgra[0] / (double)255,
color.bgra[3] / (double)255
);
cairo_fill(d->cairo);
cairo_restore(d->cairo);
wl_surface_damage(d->surf, x, y, w, h);
}
uint32_t
setup_buffer(struct drwsurf *drwsurf)
{
int stride = drwsurf->width * 4;
drwsurf->size = stride * drwsurf->height;
int fd = allocate_shm_file(drwsurf->size);
if (fd == -1) {
return 1;
}
drwsurf->pool_data = mmap(NULL, drwsurf->size,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (drwsurf->pool_data == MAP_FAILED) {
close(fd);
return 1;
}
struct wl_shm_pool *pool = wl_shm_create_pool(drwsurf->ctx->shm, fd, drwsurf->size);
drwsurf->buf = wl_shm_pool_create_buffer(pool, 0,
drwsurf->width, drwsurf->height, stride, WL_SHM_FORMAT_ARGB8888);
wl_shm_pool_destroy(pool);
close(fd);
cairo_surface_t *s = cairo_image_surface_create_for_data(drwsurf->pool_data,
CAIRO_FORMAT_ARGB32,
drwsurf->width, drwsurf->height, stride);
drwsurf->cairo = cairo_create(s);
cairo_scale(drwsurf->cairo, drwsurf->scale, drwsurf->scale);
drwsurf->layout = pango_cairo_create_layout(drwsurf->cairo);
pango_layout_set_font_description(drwsurf->layout, drwsurf->ctx->font_description);
cairo_save(drwsurf->cairo);
return 0;
}
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