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Handle output scaling

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This commit is contained in:
Stacy Harper
2021-08-24 20:13:37 +02:00
committed by John Sullivan
parent c806023fd5
commit fb82daea9c
4 changed files with 64 additions and 39 deletions
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30
drw.c
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@ -6,8 +6,7 @@
#include "shm_open.h"
void
drw_init(struct drw *d, const char *fc_pattern, struct wl_display *dpy,
void *shm) {
drw_init(struct drw *d, const char *fc_pattern, void *shm) {
d->shm = shm;
d->font_description = pango_font_description_from_string(fc_pattern);
}
@ -19,15 +18,16 @@ drwsurf_init(struct drw *d, struct drwsurf *ds, struct wl_surface *surf) {
}
void
drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h) {
drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h, uint32_t s) {
if (ds->buf) {
munmap(ds->pool_data, ds->s);
munmap(ds->pool_data, ds->size);
wl_buffer_destroy(ds->buf);
ds->buf = NULL;
}
ds->w = w;
ds->h = h;
ds->scale = s;
ds->width = w * s;
ds->height = h * s;
setup_buffer(ds);
}
@ -45,11 +45,12 @@ drwsurf_flip(struct drwsurf *ds) {
wl_callback_add_listener(ds->cb, &frame_listener, (void *)ds);
if (ds->dirty) {
wl_surface_damage(ds->surf, 0, 0, ds->w, ds->h);
wl_surface_damage(ds->surf, 0, 0, ds->width, ds->height);
ds->dirty = false;
}
wl_surface_attach(ds->surf, ds->buf, 0, 0);
wl_surface_set_buffer_scale(ds->surf, ds->scale);
wl_surface_commit(ds->surf);
}
@ -112,32 +113,33 @@ drw_fill_rectangle(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
uint32_t
setup_buffer(struct drwsurf *drwsurf)
{
int stride = drwsurf->w * 4;
drwsurf->s = stride * drwsurf->h;
int stride = drwsurf->width * 4;
drwsurf->size = stride * drwsurf->height;
int fd = allocate_shm_file(drwsurf->s);
int fd = allocate_shm_file(drwsurf->size);
if (fd == -1) {
return 1;
}
drwsurf->pool_data = mmap(NULL, drwsurf->s,
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->s);
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->w, drwsurf->h, stride, WL_SHM_FORMAT_ARGB8888);
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->w, drwsurf->h, stride);
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);