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Make font_texture_create() more generic

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Move font_texture_create() to font.c so it can be used for purposes other
than rendering the menu, for example server side decoration.

Refactor menu.c and menu.h to use this more generic font_texture_create()
This commit is contained in:
Johan Malm 2021-08-07 08:35:46 +01:00
parent 8fc6f795db
commit 5ecf0e1e7e
5 changed files with 104 additions and 72 deletions
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53
src/common/font.c
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@ -1,7 +1,11 @@
#include <cairo.h>
#include <drm_fourcc.h>
#include <pango/pangocairo.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/box.h>
#include <wlr/util/log.h>
#include "common/font.h"
#include "labwc.h"
static PangoRectangle
font_extents(const char *font_description, const char *string)
@ -43,6 +47,53 @@ font_height(const char *font_description)
return rectangle.height;
}
void
font_texture_create(struct server *server, struct wlr_texture **texture,
int max_width, const char *text, const char *font, float *color)
{
if (!text || !*text) {
return;
}
if (*texture) {
wlr_texture_destroy(*texture);
*texture = NULL;
}
PangoRectangle rect = font_extents(font, text);
if (max_width && rect.width > max_width) {
rect.width = max_width;
}
cairo_surface_t *surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
rect.width, rect.height);
cairo_t *cairo = cairo_create(surf);
cairo_set_source_rgba(cairo, color[0], color[1], color[2], color[3]);
cairo_move_to(cairo, 0, 0);
PangoLayout *layout = pango_cairo_create_layout(cairo);
pango_layout_set_width(layout, rect.width * PANGO_SCALE);
pango_layout_set_text(layout, text, -1);
pango_layout_set_ellipsize(layout, PANGO_ELLIPSIZE_END);
PangoFontDescription *desc = pango_font_description_from_string(font);
pango_layout_set_font_description(layout, desc);
pango_font_description_free(desc);
pango_cairo_update_layout(cairo, layout);
pango_cairo_show_layout(cairo, layout);
g_object_unref(layout);
cairo_surface_flush(surf);
unsigned char *data = cairo_image_surface_get_data(surf);
*texture = wlr_texture_from_pixels(server->renderer, DRM_FORMAT_ARGB8888,
cairo_image_surface_get_stride(surf), rect.width,
rect.height, data);
cairo_destroy(cairo);
cairo_surface_destroy(surf);
}
void
font_finish(void)
{