1c4100ce5d
This patch creates all necessary windows for i3bar with 32-bit visuals if available. It also introduces the possibility to define RGBA colors (next to RGB colors), which allows the user to set the opacity of any color. This requires running a compositor. With this patch we also start supporting _NET_SYSTEM_TRAY_VISUAL, which is necessary for the tray icons so they create the tray window with the correct depth and visual.
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* © 2015 Ingo Bürk and contributors (see also: LICENSE)
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*
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* cairo_util.h: Utility for operations using cairo.
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*
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*/
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#pragma once
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#include <cairo/cairo-xcb.h>
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/* Represents a color split by color channel. */
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typedef struct color_t {
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double red;
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double green;
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double blue;
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double alpha;
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/* For compatibility, we also store the colorpixel for now. */
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uint32_t colorpixel;
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} color_t;
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/* A wrapper grouping an XCB drawable and both a graphics context
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* and the corresponding cairo objects representing it. */
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typedef struct surface_t {
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/* The drawable which is being represented. */
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xcb_drawable_t id;
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// TODO remove this once i3 uses solely cairo for drawing operations
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/* A classic XCB graphics context. This should not be used for
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* drawing operations. */
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xcb_gcontext_t gc;
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/* A cairo surface representing the drawable. */
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cairo_surface_t *surface;
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/* The cairo object representing the drawale. In general,
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* this is what one should use for any drawing operation. */
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cairo_t *cr;
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} surface_t;
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/**
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* Initialize the cairo surface to represent the given drawable.
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*
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*/
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void cairo_surface_init(surface_t *surface, xcb_drawable_t drawable, int width, int height);
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/**
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* Destroys the surface.
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*
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*/
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void cairo_surface_free(surface_t *surface);
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/**
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* Parses the given color in hex format to an internal color representation.
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* Note that the input must begin with a hash sign, e.g., "#3fbc59".
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*
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*/
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color_t cairo_hex_to_color(const char *color);
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/**
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* Set the given color as the source color on the surface.
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*
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*/
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void cairo_set_source_color(surface_t *surface, color_t color);
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