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Drop wld and implement our own pangocairo renderer

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This commit is contained in:
Stacy Harper
2021-08-24 18:52:05 +02:00
committed by John Sullivan
parent 9b53b2c836
commit c806023fd5
10 changed files with 210 additions and 69 deletions
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118
drw.c
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@ -1,49 +1,43 @@
#include "wld/wayland.h"
#include "wld/wld.h"
#include <wayland-client.h>
#include <sys/mman.h>
#include <unistd.h>
#include "drw.h"
#include "shm_open.h"
void
drw_init(struct drw *d, const char *fc_pattern, struct wl_display *dpy,
void *iface) {
d->wld = wld_wayland_create_context(dpy, WLD_ANY, iface);
d->fctx = wld_font_create_context();
d->font = wld_font_open_name(d->fctx, fc_pattern);
void *shm) {
d->shm = shm;
d->font_description = pango_font_description_from_string(fc_pattern);
}
void
drwsurf_init(struct drw *d, struct drwsurf *ds, struct wl_surface *surf) {
ds->ctx = d;
ds->surf = surf;
ds->render = wld_create_renderer(d->wld);
}
void
drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h) {
union wld_object obj;
if (ds->buf) {
wld_buffer_unreference(ds->buf);
munmap(ds->pool_data, ds->s);
wl_buffer_destroy(ds->buf);
ds->buf = NULL;
ds->ref = NULL;
}
ds->w = w;
ds->h = h;
ds->buf = wld_create_buffer(ds->ctx->wld, w, h, WLD_FORMAT_ARGB8888, 0);
wld_set_target_buffer(ds->render, ds->buf);
wld_export(ds->buf, WLD_WAYLAND_OBJECT_BUFFER, &obj);
ds->ref = obj.ptr;
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};
static struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
void
drwsurf_flip(struct drwsurf *ds) {
@ -52,12 +46,10 @@ drwsurf_flip(struct drwsurf *ds) {
if (ds->dirty) {
wl_surface_damage(ds->surf, 0, 0, ds->w, ds->h);
wld_flush(ds->render);
wld_set_target_buffer(ds->render, ds->buf);
ds->dirty = false;
}
wl_surface_attach(ds->surf, ds->ref, 0, 0);
wl_surface_attach(ds->surf, ds->buf, 0, 0);
wl_surface_commit(ds->surf);
}
@ -69,3 +61,87 @@ surface_frame_callback(void *data, struct wl_callback *cb, uint32_t time) {
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);
}
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);
}
uint32_t
setup_buffer(struct drwsurf *drwsurf)
{
int stride = drwsurf->w * 4;
drwsurf->s = stride * drwsurf->h;
int fd = allocate_shm_file(drwsurf->s);
if (fd == -1) {
return 1;
}
drwsurf->pool_data = mmap(NULL, drwsurf->s,
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->s);
drwsurf->buf = wl_shm_pool_create_buffer(pool, 0,
drwsurf->w, drwsurf->h, 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->w, drwsurf->h, stride);
drwsurf->cairo = cairo_create(s);
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;
}