diff --git a/font.c b/font.c index 4951113..ec4eba2 100644 --- a/font.c +++ b/font.c @@ -177,8 +177,11 @@ from_font_set(FcPattern *pattern, FcFontSet *fonts, int start_idx, if (FcPatternGetDouble(final_pattern, FC_DPI, 0, &dpi) != FcResultMatch) dpi = 96; + double size; double pixel_size; - if (FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &pixel_size)) { + if (FcPatternGetDouble(final_pattern, FC_SIZE, 0, &size) != FcResultMatch || + FcPatternGetDouble(final_pattern, FC_PIXEL_SIZE, 0, &pixel_size) != FcResultMatch) + { LOG_ERR("%s: failed to get size", face_file); FcPatternDestroy(final_pattern); return false; @@ -188,9 +191,32 @@ from_font_set(FcPattern *pattern, FcFontSet *fonts, int start_idx, if (FcPatternGetBool(final_pattern, FC_SCALABLE, 0, &scalable) != FcResultMatch) scalable = FcTrue; + FcBool outline; + if (FcPatternGetBool(final_pattern, FC_OUTLINE, 0, &outline) != FcResultMatch) + outline = FcTrue; + double pixel_fixup; - if (FcPatternGetDouble(final_pattern, "pixelsizefixupfactor", 0, &pixel_fixup) != FcResultMatch) - pixel_fixup = 1.; + if (FcPatternGetDouble(final_pattern, "pixelsizefixupfactor", 0, &pixel_fixup) != FcResultMatch) { + /* + * Force a fixup factor on scalable bitmap fonts (typically + * emoji fonts). The fixup factor is + * requested-pixel-size / actual-pixels-size + */ + if (scalable && !outline) { + double original_pixel_size; + if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &original_pixel_size) != FcResultMatch) { + double original_size; + if (FcPatternGetDouble(pattern, FC_SIZE, 0, &original_size) != FcResultMatch) + original_size = size; + original_pixel_size = original_size * dpi / 72; + } + pixel_fixup = original_pixel_size / pixel_size; + + LOG_DBG("estimated fixup factor to %f (requested pixel size: %f, actual: %f)", + pixel_fixup, original_pixel_size, pixel_size); + } else + pixel_fixup = 1.; + } LOG_DBG("loading: %s", face_file); @@ -285,7 +311,7 @@ from_font_set(FcPattern *pattern, FcFontSet *fonts, int start_idx, font->face = ft_face; font->load_flags = load_flags | FT_LOAD_COLOR; font->render_flags = render_flags; - font->pixel_size_fixup = scalable ? pixel_fixup : 1.; + font->pixel_size_fixup = pixel_fixup; font->bgr = fc_rgba == FC_RGBA_BGR || fc_rgba == FC_RGBA_VBGR; font->fc_idx = font_idx; font->is_fallback = is_fallback;