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c8b342ae51
By default, age all matching buffers that are busy (i.e. in use by the compositor). This allows us to detect whether we can apply the current frame’s damage directly, or if we need to prepare the buffer first (e.g. copy old buffer, or re-apply last frame’s damage etc).
59 lines
2 KiB
C
59 lines
2 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <pixman.h>
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#include <wayland-client.h>
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struct buffer {
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unsigned long cookie;
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int width;
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int height;
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int stride;
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bool busy;
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size_t size; /* Buffer size */
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void *mmapped; /* Raw data (TODO: rename) */
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struct wl_buffer *wl_buf;
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pixman_image_t **pix;
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size_t pix_instances;
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/* Internal */
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int fd; /* memfd */
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struct wl_shm_pool *pool;
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void *real_mmapped; /* Address returned from mmap */
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size_t mmap_size; /* Size of mmap (>= size) */
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off_t offset; /* Offset into memfd where data begins */
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bool scrollable;
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bool purge; /* True if this buffer should be destroyed */
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int age;
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};
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struct buffer *shm_get_buffer(
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struct wl_shm *shm, int width, int height, unsigned long cookie, bool scrollable, size_t pix_instances);
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void shm_fini(void);
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void shm_set_max_pool_size(off_t max_pool_size);
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bool shm_can_scroll(const struct buffer *buf);
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bool shm_scroll(struct wl_shm *shm, struct buffer *buf, int rows,
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int top_margin, int top_keep_rows,
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int bottom_margin, int bottom_keep_rows);
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void shm_purge(struct wl_shm *shm, unsigned long cookie);
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struct terminal;
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static inline unsigned long shm_cookie_grid(const struct terminal *term) { return (unsigned long)((uintptr_t)term + 0); }
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static inline unsigned long shm_cookie_search(const struct terminal *term) { return (unsigned long)((uintptr_t)term + 1); }
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static inline unsigned long shm_cookie_scrollback_indicator(const struct terminal *term) { return (unsigned long)(uintptr_t)term + 2; }
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static inline unsigned long shm_cookie_render_timer(const struct terminal *term) { return (unsigned long)(uintptr_t)term + 3; }
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static inline unsigned long shm_cookie_csd(const struct terminal *term, int n) { return (unsigned long)((uintptr_t)term + 4 + (n)); }
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struct url;
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static inline unsigned long shm_cookie_url(const struct url *url) { return (unsigned long)(uintptr_t)url; }
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