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common/font: add scaled_font_buffer_create_for_titlebar()

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Co-authored-by: tokyo4j <hrak1529@gmail.com>
This commit is contained in:
John Lindgren 2025-05-29 12:34:03 -04:00
parent 3ca7adace0
commit 54b236e027
4 changed files with 76 additions and 18 deletions
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24
include/common/scaled-font-buffer.h
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@ -20,6 +20,16 @@ struct scaled_font_buffer {
float bg_color[4];
struct font font;
struct scaled_scene_buffer *scaled_buffer;
/*
* The following fields are used only for the titlebar, where
* the font buffer can be rendered with a pattern background to
* support gradients. In this case, the font buffer is also
* padded to a fixed height (with the text centered vertically)
* in order to align the pattern with the rest of the titlebar.
*/
int fixed_height;
cairo_pattern_t *bg_pattern; /* overrides bg_color if set */
};
/**
@ -33,6 +43,17 @@ struct scaled_font_buffer {
*/
struct scaled_font_buffer *scaled_font_buffer_create(struct wlr_scene_tree *parent);
/**
* Create an auto scaling font buffer for titlebar text.
* The font buffer takes a new reference to bg_pattern.
*
* @param fixed_height Fixed height for the buffer (logical pixels)
* @param bg_pattern Background pattern (solid color or gradient)
*/
struct scaled_font_buffer *
scaled_font_buffer_create_for_titlebar(struct wlr_scene_tree *parent,
int fixed_height, cairo_pattern_t *bg_pattern);
/**
* Update an existing auto scaling font buffer.
*
@ -44,6 +65,9 @@ struct scaled_font_buffer *scaled_font_buffer_create(struct wlr_scene_tree *pare
* - truncated = buffer->width == max_width
* - text_changed = strcmp(old_text, new_text)
* - font and color the same
*
* bg_color is ignored for font buffers created with
* scaled_font_buffer_create_for_titlebar().
*/
void scaled_font_buffer_update(struct scaled_font_buffer *self, const char *text,
int max_width, struct font *font, const float *color,