double
_rsvg_css_normalize_length (const RsvgLength * in, RsvgDrawingCtx * ctx, char dir)
{
if (in->factor == '\0')
return in->length;
else if (in->factor == 'p') {
if (dir == 'h')
return in->length * ctx->vb.rect.width;
if (dir == 'v')
return in->length * ctx->vb.rect.height;
if (dir == 'o')
return in->length * rsvg_viewport_percentage (ctx->vb.rect.width,
ctx->vb.rect.height);
} else if (in->factor == 'm' || in->factor == 'x') {
double font = _rsvg_css_normalize_font_size (rsvg_current_state (ctx), ctx);
if (in->factor == 'm')
return in->length * font;
else
return in->length * font / 2.;
} else if (in->factor == 'i') {
if (dir == 'h')
return in->length * ctx->dpi_x;
if (dir == 'v')
return in->length * ctx->dpi_y;
if (dir == 'o')
return in->length * rsvg_viewport_percentage (ctx->dpi_x, ctx->dpi_y);
} else if (in->factor == 'l') {
/* todo: "larger" */
} else if (in->factor == 's') {
/* todo: "smaller" */
}
return 0;
}
double
_rsvg_css_normalize_font_size (RsvgState * state, RsvgDrawingCtx * ctx)
{
RsvgState *parent;
switch (state->font_size.factor) {
case 'p':
case 'm':
case 'x':
parent= rsvg_state_parent (state);
if (parent) {
double parent_size;
parent_size = _rsvg_css_normalize_font_size (parent, ctx);
return state->font_size.length * parent_size;
}
break;
default:
return _rsvg_css_normalize_length (&state->font_size, ctx, 'v');
break;
}
return 12.;
}
static PangoLayout *
rsvg_text_create_layout (RsvgDrawingCtx * ctx,
RsvgState * state, const char *text, PangoContext * context)
{
PangoFontDescription *font_desc;
PangoLayout *layout;
PangoAttrList *attr_list;
PangoAttribute *attribute;
if (state->lang)
pango_context_set_language (context, pango_language_from_string (state->lang));
if (state->unicode_bidi == UNICODE_BIDI_OVERRIDE || state->unicode_bidi == UNICODE_BIDI_EMBED)
pango_context_set_base_dir (context, state->text_dir);
font_desc = pango_font_description_copy (pango_context_get_font_description (context));
if (state->font_family)
pango_font_description_set_family_static (font_desc, state->font_family);
pango_font_description_set_style (font_desc, state->font_style);
pango_font_description_set_variant (font_desc, state->font_variant);
pango_font_description_set_weight (font_desc, state->font_weight);
pango_font_description_set_stretch (font_desc, state->font_stretch);
pango_font_description_set_size (font_desc,
_rsvg_css_normalize_font_size (state, ctx) *
PANGO_SCALE / ctx->dpi_y * 72);
layout = pango_layout_new (context);
pango_layout_set_font_description (layout, font_desc);
pango_font_description_free (font_desc);
attr_list = pango_attr_list_new ();
attribute = pango_attr_letter_spacing_new (_rsvg_css_normalize_length (&state->letter_spacing,
ctx, 'h') * PANGO_SCALE);
attribute->start_index = 0;
attribute->end_index = G_MAXINT;
pango_attr_list_insert (attr_list, attribute);
if (state->has_font_decor && text) {
if (state->font_decor & TEXT_UNDERLINE) {
attribute = pango_attr_underline_new (PANGO_UNDERLINE_SINGLE);
attribute->start_index = 0;
attribute->end_index = -1;
pango_attr_list_insert (attr_list, attribute);
}
if (state->font_decor & TEXT_STRIKE) {
attribute = pango_attr_strikethrough_new (TRUE);
attribute->start_index = 0;
attribute->end_index = -1;
pango_attr_list_insert (attr_list, attribute);
}
}
pango_layout_set_attributes (layout, attr_list);
pango_attr_list_unref (attr_list);
if (text)
pango_layout_set_text (layout, text, -1);
else
pango_layout_set_text (layout, NULL, 0);
pango_layout_set_alignment (layout, (state->text_dir == PANGO_DIRECTION_LTR ||
state->text_dir == PANGO_DIRECTION_TTB_LTR) ?
PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT);
return layout;
}
