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https://github.com/jjsullivan5196/wvkbd.git
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686b27a72d
Until this point we was using one single buffer. This cause tearing when they are scanned while we are drawing. This refactorize our buffer and damage tracking to use two buffers. One buffer, the back_buffer, is our dirty area. The other one, the display_buffer, is left untouched. Now we only flip buffers on adequate moments, indicated by the compositor sending the frame callback event. We can draw multiple time between those events, and we store all damaged areas. We only schedule frame callbacks when needed, after storing a new damaged area. Once flipped, we backport the damaged area from the new display_buffer to the new back_buffer. Which generally means, for wvkbd, one rectangle for each one of the surf and popup_surf. Signed-off-by: Maarten van Gompel <proycon@anaproy.nl>
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
#ifndef __DRW_H
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#define __DRW_H
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#include <pango/pangocairo.h>
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#include <stdbool.h>
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struct drw {
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struct wl_shm *shm;
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};
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struct drwbuf {
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uint32_t size;
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struct wl_buffer *buf;
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cairo_region_t *damage;
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cairo_surface_t *cairo_surf;
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cairo_t *cairo;
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PangoLayout *layout;
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unsigned char *pool_data;
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};
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struct drwsurf {
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uint32_t width, height;
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double scale;
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struct drw *ctx;
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struct wl_surface *surf;
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struct wl_shm *shm;
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struct wl_callback *frame_cb;
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bool attached;
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struct drwbuf *back_buffer;
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struct drwbuf *display_buffer;
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};
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struct kbd;
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void drwsurf_damage(struct drwsurf *ds, uint32_t x, uint32_t y, uint32_t w, uint32_t h);
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void drwsurf_resize(struct drwsurf *ds, uint32_t w, uint32_t h, double s);
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void drwsurf_flip(struct drwsurf *ds);
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typedef union {
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uint8_t bgra[4];
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uint32_t color;
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} Color;
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void drw_do_clear(struct drwsurf *ds, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h);
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void drw_do_rectangle(struct drwsurf *ds, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, bool fill, int rounding);
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void drw_fill_rectangle(struct drwsurf *ds, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, int rounding);
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void drw_over_rectangle(struct drwsurf *ds, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, int rounding);
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void drw_draw_text(struct drwsurf *ds, Color color, uint32_t x, uint32_t y,
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uint32_t w, uint32_t h, uint32_t b, const char *label,
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PangoFontDescription *font_description);
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uint32_t setup_buffer(struct drwsurf *ds, struct drwbuf *db);
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#endif
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