/**
* _pango_cairo_font_install:
* @font: a #PangoCairoFont
* @cr: a #cairo_t
*
* Makes @font the current font for rendering in the specified
* Cairo context.
*
* Return value: %TRUE if font was installed successfully, %FALSE otherwise.
**/
gboolean
_pango_cairo_font_install (PangoFont *font,
cairo_t *cr)
{
cairo_scaled_font_t *scaled_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *)font);
if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
return FALSE;
cairo_set_scaled_font (cr, scaled_font);
return TRUE;
}
cairo_scaled_font_t* createScaledFontForFont(const wxFont* wxfont)
{
ASSERT(wxfont && wxfont->Ok());
cairo_scaled_font_t* scaledFont = NULL;
PangoFont* pangoFont = createPangoFontForFont(wxfont);
#if PANGO_VERSION_CHECK(1,18,0)
if (pangoFont)
scaledFont = cairo_scaled_font_reference(pango_cairo_font_get_scaled_font(PANGO_CAIRO_FONT(pangoFont)));
#endif
return scaledFont;
}
FontPlatformData::FontPlatformData(const FontDescription& fontDescription, const AtomicString& familyName)
: m_context(0)
, m_font(0)
, m_size(fontDescription.computedSize())
, m_syntheticBold(false)
, m_syntheticOblique(false)
, m_scaledFont(0)
{
FontPlatformData::init();
CString stored_family = familyName.string().utf8();
char const* families[] = {
stored_family.data(),
NULL
};
switch (fontDescription.genericFamily()) {
case FontDescription::SerifFamily:
families[1] = "serif";
break;
case FontDescription::SansSerifFamily:
families[1] = "sans";
break;
case FontDescription::MonospaceFamily:
families[1] = "monospace";
break;
case FontDescription::NoFamily:
case FontDescription::StandardFamily:
default:
families[1] = "sans";
break;
}
PangoFontDescription* description = pango_font_description_new();
pango_font_description_set_absolute_size(description, fontDescription.computedSize() * PANGO_SCALE);
// FIXME: Map all FontWeight values to Pango font weights.
if (fontDescription.weight() >= FontWeight600)
pango_font_description_set_weight(description, PANGO_WEIGHT_BOLD);
if (fontDescription.italic())
pango_font_description_set_style(description, PANGO_STYLE_ITALIC);
#if PANGO_VERSION_CHECK(1,21,5) // deprecated in 1.21
m_context = pango_font_map_create_context(m_fontMap);
#else
m_context = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(m_fontMap));
#endif
for (unsigned int i = 0; !m_font && i < G_N_ELEMENTS(families); i++) {
pango_font_description_set_family(description, families[i]);
pango_context_set_font_description(m_context, description);
m_font = pango_font_map_load_font(m_fontMap, m_context, description);
}
#if PANGO_VERSION_CHECK(1,18,0)
if (m_font)
m_scaledFont = cairo_scaled_font_reference(pango_cairo_font_get_scaled_font(PANGO_CAIRO_FONT(m_font)));
#else
// This compatibility code for older versions of Pango is not well-tested.
if (m_font) {
PangoFcFont* fcfont = PANGO_FC_FONT(m_font);
cairo_font_face_t* face = cairo_ft_font_face_create_for_pattern(fcfont->font_pattern);
double size;
if (FcPatternGetDouble(fcfont->font_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
size = 12.0;
cairo_matrix_t fontMatrix;
cairo_matrix_init_scale(&fontMatrix, size, size);
cairo_font_options_t* fontOptions;
if (pango_cairo_context_get_font_options(m_context))
fontOptions = cairo_font_options_copy(pango_cairo_context_get_font_options(m_context));
else
fontOptions = cairo_font_options_create();
cairo_matrix_t ctm;
cairo_matrix_init_identity(&ctm);
m_scaledFont = cairo_scaled_font_create(face, &fontMatrix, &ctm, fontOptions);
cairo_font_options_destroy(fontOptions);
cairo_font_face_destroy(face);
}
#endif
pango_font_description_free(description);
}
static PangoCairoFontHexBoxInfo *
_pango_cairo_font_private_get_hex_box_info (PangoCairoFontPrivate *cf_priv)
{
static const char hexdigits[] = "0123456789ABCDEF";
char c[2] = {0, 0};
PangoFont *mini_font;
PangoCairoFontHexBoxInfo *hbi;
/* for metrics hinting */
double scale_x = 1., scale_x_inv = 1., scale_y = 1., scale_y_inv = 1.;
gboolean is_hinted;
int i;
int rows;
double pad;
double width = 0;
double height = 0;
cairo_font_options_t *font_options;
cairo_font_extents_t font_extents;
double size, mini_size;
PangoFontDescription *desc;
cairo_scaled_font_t *scaled_font, *scaled_mini_font;
PangoMatrix pango_ctm;
cairo_matrix_t cairo_ctm;
PangoGravity gravity;
if (!cf_priv)
return NULL;
if (cf_priv->hbi)
return cf_priv->hbi;
scaled_font = _pango_cairo_font_private_get_scaled_font (cf_priv);
if (G_UNLIKELY (scaled_font == NULL || cairo_scaled_font_status (scaled_font) != CAIRO_STATUS_SUCCESS))
return NULL;
is_hinted = cf_priv->is_hinted;
font_options = cairo_font_options_create ();
desc = pango_font_describe_with_absolute_size ((PangoFont *)cf_priv->cfont);
size = pango_font_description_get_size (desc) / (1.*PANGO_SCALE);
gravity = pango_font_description_get_gravity (desc);
cairo_scaled_font_get_ctm (scaled_font, &cairo_ctm);
cairo_scaled_font_get_font_options (scaled_font, font_options);
/* I started adding support for vertical hexboxes here, but it's too much
* work. Easier to do with cairo user fonts and vertical writing mode
* support in cairo.
*/
/*cairo_matrix_rotate (&cairo_ctm, pango_gravity_to_rotation (gravity));*/
pango_ctm.xx = cairo_ctm.xx;
pango_ctm.yx = cairo_ctm.yx;
pango_ctm.xy = cairo_ctm.xy;
pango_ctm.yy = cairo_ctm.yy;
pango_ctm.x0 = cairo_ctm.x0;
pango_ctm.y0 = cairo_ctm.y0;
if (is_hinted)
{
/* prepare for some hinting */
double x, y;
x = 1.; y = 0.;
cairo_matrix_transform_distance (&cairo_ctm, &x, &y);
scale_x = sqrt (x*x + y*y);
scale_x_inv = 1 / scale_x;
x = 0.; y = 1.;
cairo_matrix_transform_distance (&cairo_ctm, &x, &y);
scale_y = sqrt (x*x + y*y);
scale_y_inv = 1 / scale_y;
}
/* we hint to the nearest device units */
#define HINT(value, scale, scale_inv) (ceil ((value-1e-5) * scale) * scale_inv)
#define HINT_X(value) HINT ((value), scale_x, scale_x_inv)
#define HINT_Y(value) HINT ((value), scale_y, scale_y_inv)
/* create mini_font description */
{
PangoFontMap *fontmap;
PangoContext *context;
/* XXX this is racy. need a ref'ing getter... */
fontmap = pango_font_get_font_map ((PangoFont *)cf_priv->cfont);
if (!fontmap)
return NULL;
fontmap = g_object_ref (fontmap);
/* we inherit most font properties for the mini font. just
* change family and size. means, you get bold hex digits
* in the hexbox for a bold font.
*/
/* We should rotate the box, not glyphs */
pango_font_description_unset_fields (desc, PANGO_FONT_MASK_GRAVITY);
pango_font_description_set_family_static (desc, "monospace");
rows = 2;
mini_size = size / 2.2;
if (is_hinted)
{
mini_size = HINT_Y (mini_size);
if (mini_size < 6.0)
{
rows = 1;
mini_size = MIN (MAX (size - 1, 0), 6.0);
}
}
pango_font_description_set_absolute_size (desc, pango_units_from_double (mini_size));
/* load mini_font */
context = pango_font_map_create_context (fontmap);
pango_context_set_matrix (context, &pango_ctm);
pango_context_set_language (context, pango_script_get_sample_language (PANGO_SCRIPT_LATIN));
pango_cairo_context_set_font_options (context, font_options);
mini_font = pango_font_map_load_font (fontmap, context, desc);
g_object_unref (context);
g_object_unref (fontmap);
}
pango_font_description_free (desc);
cairo_font_options_destroy (font_options);
scaled_mini_font = pango_cairo_font_get_scaled_font ((PangoCairoFont *) mini_font);
for (i = 0 ; i < 16 ; i++)
{
cairo_text_extents_t extents;
c[0] = hexdigits[i];
cairo_scaled_font_text_extents (scaled_mini_font, c, &extents);
width = MAX (width, extents.width);
height = MAX (height, extents.height);
}
cairo_scaled_font_extents (scaled_font, &font_extents);
if (font_extents.ascent + font_extents.descent <= 0)
{
font_extents.ascent = PANGO_UNKNOWN_GLYPH_HEIGHT;
font_extents.descent = 0;
}
pad = (font_extents.ascent + font_extents.descent) / 43;
pad = MIN (pad, mini_size);
hbi = g_slice_new (PangoCairoFontHexBoxInfo);
hbi->font = (PangoCairoFont *) mini_font;
hbi->rows = rows;
hbi->digit_width = width;
hbi->digit_height = height;
hbi->pad_x = pad;
hbi->pad_y = pad;
if (is_hinted)
{
hbi->digit_width = HINT_X (hbi->digit_width);
hbi->digit_height = HINT_Y (hbi->digit_height);
hbi->pad_x = HINT_X (hbi->pad_x);
hbi->pad_y = HINT_Y (hbi->pad_y);
}
hbi->line_width = MIN (hbi->pad_x, hbi->pad_y);
hbi->box_height = 3 * hbi->pad_y + rows * (hbi->pad_y + hbi->digit_height);
if (rows == 1 || hbi->box_height <= font_extents.ascent)
{
hbi->box_descent = 2 * hbi->pad_y;
}
else if (hbi->box_height <= font_extents.ascent + font_extents.descent - 2 * hbi->pad_y)
{
hbi->box_descent = 2 * hbi->pad_y + hbi->box_height - font_extents.ascent;
}
else
{
hbi->box_descent = font_extents.descent * hbi->box_height /
(font_extents.ascent + font_extents.descent);
}
if (is_hinted)
{
hbi->box_descent = HINT_Y (hbi->box_descent);
}
cf_priv->hbi = hbi;
return hbi;
}
FontPlatformData::FontPlatformData(const FontDescription& fontDescription, const UChar *characters, int length)
: m_context(0)
, m_font(0)
, m_size(fontDescription.computedSize())
, m_syntheticBold(false)
, m_syntheticOblique(false)
, m_scaledFont(0)
{
FontPlatformData::init();
const UChar character = characters[0];
char const *family;
switch (fontDescription.genericFamily()) {
case FontDescription::SerifFamily:
family = "serif";
break;
case FontDescription::SansSerifFamily:
family = "sans";
break;
case FontDescription::MonospaceFamily:
family = "monospace";
break;
case FontDescription::NoFamily:
case FontDescription::StandardFamily:
default:
family = "sans";
break;
}
m_context = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(m_fontMap));
PangoFontDescription* description = pango_font_description_new();
pango_font_description_set_absolute_size(description, fontDescription.computedSize() * PANGO_SCALE);
if (fontDescription.weight() >= FontWeight600)
pango_font_description_set_weight(description, PANGO_WEIGHT_BOLD);
if (fontDescription.italic())
pango_font_description_set_style(description, PANGO_STYLE_ITALIC);
pango_font_description_set_family(description, family);
pango_context_set_font_description(m_context, description);
PangoFontset *fset = pango_font_map_load_fontset (m_fontMap, m_context, description, NULL);
// Get the font from the fontset which contains the best glyph for this character
m_font = pango_fontset_get_font(fset, (guint)character);
#if PANGO_VERSION_CHECK(1,18,0)
if (m_font)
m_scaledFont = cairo_scaled_font_reference(pango_cairo_font_get_scaled_font(PANGO_CAIRO_FONT(m_font)));
#else
// This compatibility code for older versions of Pango is not well-tested.
if (m_font) {
PangoFcFont* fcfont = PANGO_FC_FONT(m_font);
cairo_font_face_t* face = cairo_ft_font_face_create_for_pattern(fcfont->font_pattern);
double size;
if (FcPatternGetDouble(fcfont->font_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
size = 12.0;
cairo_matrix_t fontMatrix;
cairo_matrix_init_scale(&fontMatrix, size, size);
cairo_font_options_t* fontOptions;
if (pango_cairo_context_get_font_options(m_context))
fontOptions = cairo_font_options_copy(pango_cairo_context_get_font_options(m_context));
else
fontOptions = cairo_font_options_create();
cairo_matrix_t ctm;
cairo_matrix_init_identity(&ctm);
m_scaledFont = cairo_scaled_font_create(face, &fontMatrix, &ctm, fontOptions);
cairo_font_options_destroy(fontOptions);
cairo_font_face_destroy(face);
}
#endif
pango_font_description_free(description);
}
static PangoClutterGlyphCacheValue *
pango_clutter_renderer_get_cached_glyph (PangoRenderer *renderer,
PangoFont *font,
PangoGlyph glyph)
{
PangoClutterRenderer *priv = PANGO_CLUTTER_RENDERER (renderer);
PangoClutterGlyphCacheValue *value;
PangoClutterGlyphCache *glyph_cache;
glyph_cache = priv->use_mipmapping
? priv->mipmapped_glyph_cache : priv->glyph_cache;
if ((value = pango_clutter_glyph_cache_lookup (glyph_cache,
font,
glyph)) == NULL)
{
cairo_surface_t *surface;
cairo_t *cr;
cairo_scaled_font_t *scaled_font;
PangoRectangle ink_rect;
cairo_glyph_t cairo_glyph;
pango_font_get_glyph_extents (font, glyph, &ink_rect, NULL);
pango_extents_to_pixels (&ink_rect, NULL);
surface = cairo_image_surface_create (CAIRO_FORMAT_A8,
ink_rect.width,
ink_rect.height);
cr = cairo_create (surface);
scaled_font = pango_cairo_font_get_scaled_font (PANGO_CAIRO_FONT (font));
cairo_set_scaled_font (cr, scaled_font);
cairo_glyph.x = -ink_rect.x;
cairo_glyph.y = -ink_rect.y;
/* The PangoCairo glyph numbers directly map to Cairo glyph
numbers */
cairo_glyph.index = glyph;
cairo_show_glyphs (cr, &cairo_glyph, 1);
cairo_destroy (cr);
cairo_surface_flush (surface);
/* Copy the glyph to the cache */
value = pango_clutter_glyph_cache_set
(glyph_cache, font, glyph,
cairo_image_surface_get_data (surface),
cairo_image_surface_get_width (surface),
cairo_image_surface_get_height (surface),
cairo_image_surface_get_stride (surface),
ink_rect.x, ink_rect.y);
cairo_surface_destroy (surface);
CLUTTER_NOTE (PANGO, "cache fail %i", glyph);
}
else
CLUTTER_NOTE (PANGO, "cache success %i", glyph);
return value;
}
