mirror of
https://github.com/jjsullivan5196/wvkbd.git
synced 2025-03-13 02:42:47 +01:00
1843e60a74
Previously wvkbd would commit an (usually) unchanged surface at the framerate of the compositor, this only commits the buffer when we render something new. Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>
126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
#include <sys/mman.h>
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#include <unistd.h>
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#include <wayland-client.h>
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#include "drw.h"
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#include "shm_open.h"
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void
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drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h, uint32_t s) {
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if (ds->buf) {
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munmap(ds->pool_data, ds->size);
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wl_buffer_destroy(ds->buf);
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ds->buf = NULL;
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}
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ds->scale = s;
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ds->width = w * s;
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ds->height = h * s;
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setup_buffer(ds);
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}
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void
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drwsurf_flip(struct drwsurf *ds) {
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wl_surface_attach(ds->surf, ds->buf, 0, 0);
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wl_surface_commit(ds->surf);
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}
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void
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drw_draw_text(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, const char *label) {
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cairo_save(d->cairo);
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cairo_set_source_rgba(
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d->cairo, color.bgra[2] / (double)255, color.bgra[1] / (double)255,
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color.bgra[0] / (double)255, color.bgra[3] / (double)255);
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cairo_move_to(d->cairo, x + (double)w / 2.0, y + (double)h / 2.0);
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pango_layout_set_text(d->layout, label, -1);
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int width, height;
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pango_layout_get_size(d->layout, &width, &height);
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cairo_rel_move_to(d->cairo, -((double)width / PANGO_SCALE) / 2,
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-((double)height / PANGO_SCALE) / 2);
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pango_cairo_show_layout(d->cairo, d->layout);
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cairo_restore(d->cairo);
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wl_surface_damage(d->surf, x, y, w, h);
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}
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void
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drw_do_rectangle(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, bool over) {
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cairo_save(d->cairo);
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if (over) {
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cairo_set_operator(d->cairo, CAIRO_OPERATOR_OVER);
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} else {
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cairo_set_operator(d->cairo, CAIRO_OPERATOR_SOURCE);
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}
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cairo_rectangle(d->cairo, x, y, w, h);
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cairo_set_source_rgba(
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d->cairo, color.bgra[2] / (double)255, color.bgra[1] / (double)255,
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color.bgra[0] / (double)255, color.bgra[3] / (double)255);
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cairo_fill(d->cairo);
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cairo_restore(d->cairo);
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wl_surface_damage(d->surf, x, y, w, h);
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}
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void
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drw_fill_rectangle(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h) {
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drw_do_rectangle(d, color, x, y, w, h, false);
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}
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void
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drw_over_rectangle(struct drwsurf *d, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h) {
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drw_do_rectangle(d, color, x, y, w, h, true);
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}
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uint32_t
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setup_buffer(struct drwsurf *drwsurf) {
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int stride = drwsurf->width * 4;
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drwsurf->size = stride * drwsurf->height;
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int fd = allocate_shm_file(drwsurf->size);
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if (fd == -1) {
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return 1;
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}
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drwsurf->pool_data =
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mmap(NULL, drwsurf->size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (drwsurf->pool_data == MAP_FAILED) {
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close(fd);
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return 1;
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}
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struct wl_shm_pool *pool =
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wl_shm_create_pool(drwsurf->ctx->shm, fd, drwsurf->size);
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drwsurf->buf = wl_shm_pool_create_buffer(
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pool, 0, drwsurf->width, drwsurf->height, stride, WL_SHM_FORMAT_ARGB8888);
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wl_shm_pool_destroy(pool);
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close(fd);
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cairo_surface_t *s = cairo_image_surface_create_for_data(
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drwsurf->pool_data, CAIRO_FORMAT_ARGB32, drwsurf->width, drwsurf->height,
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stride);
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drwsurf->cairo = cairo_create(s);
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cairo_scale(drwsurf->cairo, drwsurf->scale, drwsurf->scale);
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drwsurf->layout = pango_cairo_create_layout(drwsurf->cairo);
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pango_layout_set_font_description(drwsurf->layout,
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drwsurf->ctx->font_description);
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cairo_save(drwsurf->cairo);
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wl_surface_set_buffer_scale(drwsurf->surf, drwsurf->scale);
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return 0;
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}
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