#include <cairomm/cairomm.h>
const double HEIGHT = 200.0;
const double WIDTH = 400.0;
const double FONT_SIZE = 64.0;
const double TEXT_ORIGIN_Y = (HEIGHT / 2.0) + (FONT_SIZE / 2.0);
const double TEXT_ORIGIN_X = 50.0;
const double GLYPH_SPACING = 0.1;
struct GlyphBounds
{
unsigned long glyph;
double width;
double height;
};
static const GlyphBounds glyphs[] =
{
{ 'c', 0.45, 0.5 },
{ 'a', 0.45, 0.5 },
{ 'i', 0.2, 0.75 },
{ 'r', 0.4, 0.5 },
{ 'o', 0.44, 0.5 },
{ 'm', 0.75, 0.5 },
{ '!', 0.2, 0.75 }
};
{
public:
{
return Cairo::make_refptr_for_instance<BoxFontFace>(new BoxFontFace());
}
Cairo::ErrorStatus
{
for (unsigned int i = 0; i < sizeof (glyphs) / sizeof (GlyphBounds); ++i) {
if (glyphs[i].width >
max)
}
extents.max_x_advance =
max;
return CAIRO_STATUS_SUCCESS;
}
Cairo::ErrorStatus
unsigned long unicode, unsigned long& glyph) override
{
glyph = 0;
for (unsigned int i = 0; i < sizeof (glyphs) / sizeof (GlyphBounds); ++i) {
if (glyphs[i].glyph == unicode) {
glyph = i+1;
break;
}
}
return CAIRO_STATUS_SUCCESS;
}
Cairo::ErrorStatus
unsigned long glyph,
{
if (glyph >= 1 && glyph <= sizeof(glyphs)/sizeof(GlyphBounds)) {
cr->set_line_width(0.05);
cr->rectangle(0.0, 0.0, glyphs[glyph-1].width, -glyphs[glyph-1].height);
cr->stroke();
metrics.x_advance = glyphs[glyph-1].width + GLYPH_SPACING;
}
return CAIRO_STATUS_SUCCESS;
}
protected:
BoxFontFace() : UserFontFace() { }
};
int main(int, char**)
{
auto surface =
cr->set_source_rgb(1.0, 1.0, 1.0);
cr->paint();
cr->arc(TEXT_ORIGIN_X, TEXT_ORIGIN_Y, FONT_SIZE / 4.0, 0, 2*M_PI);
cr->set_source_rgba(0.0, 1.0, 0.0, 0.5);
cr->fill();
cr->move_to(TEXT_ORIGIN_X, TEXT_ORIGIN_Y);
cr->set_source_rgb(0.8, 0.2, 0.2);
auto font = BoxFontFace::create();
cr->set_font_face(font);
cr->set_font_size(FONT_SIZE);
cr->show_text("cairomm!");
cr->move_to(TEXT_ORIGIN_X, TEXT_ORIGIN_Y);
cr->set_source_rgba(0.2, 0.2, 0.2, 0.3);
auto toy_font =
cr->set_font_face(toy_font);
cr->set_font_size(FONT_SIZE);
cr->show_text("cairomm!");
const char* filename = "user-font.png";
try {
surface->write_to_png(filename);
return 0;
{
return 1;
}
}
basic_ostream< _CharT, _Traits > & endl(basic_ostream< _CharT, _Traits > &__os)
static RefPtr< Context > create(const RefPtr< Surface > &target)
static RefPtr< ImageSurface > create(Format format, int width, int height)
Creates an image surface of the specified format and dimensions.
@ ARGB32
Each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green,...
@ NORMAL
Upright font style.
static RefPtr< ToyFontFace > create(const std::string &family, Slant slant, Weight weight)
Creates a font face from a triplet of family, slant, and weight.
Font support with font data provided by the user.
Definition: fontface.h:245
virtual ErrorStatus render_glyph(const RefPtr< ScaledFont > &scaled_font, unsigned long glyph, const RefPtr< Context > &cr, TextExtents &metrics)=0
This function is called when a user scaled-font needs to render a glyph.
virtual ErrorStatus unicode_to_glyph(const RefPtr< ScaledFont > &scaled_font, unsigned long unicode, unsigned long &glyph)
This function is called to convert an input Unicode character to a single glyph.
virtual ErrorStatus init(const RefPtr< ScaledFont > &scaled_font, const RefPtr< Context > &cr, FontExtents &extents)
This function is called when a scaled-font needs to be created for a user font-face.
cairo_font_extents_t FontExtents
See the cairo_font_extents_t reference in the cairo manual for more information.
Definition: types.h:44
cairo_text_extents_t TextExtents
See the cairo_text_extents_t reference in the cairo manual for more information.
Definition: types.h:50