void draw_text(const fvec2 &pos, const fvec2 &size, const std::string &text,
HAlignment halign, VAlignment valign)
{
std::vector<unsigned> tt;
for (int i = 0; text[i]; i++) {
if (text[i] & 0x80) {
if ((text[i] & 0xe0) == 0xc0) {
if ((text[i + 1] & 0xc0) == 0x80) {
unsigned v = ((text[i] & 0x1f) << 6) | (text[i + 1] & 0x3f);
++i;
if (v < 256) {
tt.push_back(v);
} else {
tt.push_back(0);
}
} else {
tt.push_back(0);
}
} else {
tt.push_back(0);
}
} else {
tt.push_back(text[i]);
}
}
if (tt.size() > 64) {
throw std::invalid_argument("Text is too long");
}
CharVAElement *cvad = static_cast<CharVAElement *>(char_va->attrib(0)->map());
for (int i = 0; i < static_cast<int>(tt.size()); i++) {
for (int j = 0; j < 5; j++) {
cvad[i * 5 + j].chr = tt[i];
}
}
char_va->attrib(0)->unmap();
char_va->attrib(1)->load(sizeof(CharVAElement), offsetof(CharVAElement, chr));
fvec2 position = pos;
switch (halign) {
case ALIGN_LEFT: break;
case ALIGN_CENTER: position.x() -= tt.size() * size.x() / 2.f; break;
case ALIGN_RIGHT: position.x() -= tt.size() * size.x(); break;
default: throw std::invalid_argument("draw_text(): Invalid value given for halign");
}
switch (valign) {
case ALIGN_TOP: position.y() -= size.y() / 2.f; break;
case ALIGN_MIDDLE: break;
case ALIGN_BOTTOM: position.y() += size.y() / 2.f; break;
default: throw std::invalid_argument("draw_text(): Invalid value given for valign");
}
char_prg->use();
font[olo]->bind();
static gl::texture *last_font;
if (last_font != font[olo]) {
last_font = font[olo];
char_prg->uniform<gl::texture>("font") = *font[olo];
}
char_prg->uniform<fvec2>("position") = position;
char_prg->uniform<fvec2>("char_size") = size;
char_prg->uniform<fvec2>("font_char_fill_ratio") = font_fr[olo];
char_va->set_elements(tt.size() * 5);
char_va->draw(GL_TRIANGLE_STRIP);
}
inline fvec2 max(const fvec2& a, float b)
{
return fvec2( a.x() > b ? a.x() : b,
a.y() > b ? a.y() : b);
}
inline fvec2 max(const fvec2& a, const fvec2& b)
{
return fvec2( a.x() > b.x() ? a.x() : b.x(),
a.y() > b.y() ? a.y() : b.y());
}
inline fvec2 min(const fvec2& a, float b)
{
return fvec2( a.x() < b ? a.x() : b,
a.y() < b ? a.y() : b);
}
inline fvec2 min(const fvec2& a, const fvec2& b)
{
return fvec2( a.x() < b.x() ? a.x() : b.x(),
a.y() < b.y() ? a.y() : b.y());
}
inline float dot(const fvec2& v1, const fvec2& v2) { return v1.x()*v2.x() + v1.y()*v2.y(); }