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8b320ed296
Our home rolled clip-to-cell code was, obviously, not correct. The original problem was that we couldn't use pixman clipping since we have multiple threads writing to the same pixman image, and thus there would be races between the threads setting clipping. The fix is actually simple - just instantiate one pixman image (referencing the same backing image data) for each rendering thread.
52 lines
1.6 KiB
C
52 lines
1.6 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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};
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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_csd(const struct terminal *term, int n) { return (unsigned long)((uintptr_t)term + 2 + (n)); }
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