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Write a wrapper around xcb_image_text_16() 

xcb_image_text_16() can only process up to 255 glyphs, so we
write a wrapper around it for arbitrary long strings
This commit is contained in:
Axel Wagner 2010-09-17 01:52:04 +02:00
parent c5dc3d49aa
commit 0dc802c7b5
1 changed files with 25 additions and 0 deletions
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25
i3bar/src/xcb.c
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@ -103,6 +103,31 @@ uint32_t predict_text_extents(xcb_char2b_t *text, uint32_t length) {
return width;
}
/*
* Draws text given in UCS-2-encoding to a given drawable and position
*
*/
void draw_text(xcb_drawable_t drawable, xcb_gcontext_t ctx, int16_t x, int16_t y,
xcb_char2b_t *text, uint32_t glyph_count) {
int offset = 0;
int16_t pos_x = x;
while (glyph_count > 0) {
uint8_t chunk_size = MIN(255, glyph_count);
uint32_t chunk_width = predict_text_extents(text + offset, chunk_size);
xcb_image_text_16(xcb_connection,
chunk_size,
drawable,
ctx,
pos_x, y,
text + offset);
offset += chunk_size;
pos_x += chunk_width;
glyph_count -= chunk_size;
}
}
/*
* Converts a colorstring to a colorpixel as expected from xcb_change_gc.
* s is assumed to be in the format "rrggbb"