void GLTEXT_CALL AbstractRenderer::render(const char* text)
{
const int ascent = mFont->getAscent();
const int descent = mFont->getDescent();
const int height = ascent + descent + mFont->getLineGap();
int penX = 0;
int penY = 0;
unsigned char last_character = 0;
// Run through each char and generate a glyph to draw
for (const char* itr = text; *itr; ++itr)
{
// newline?
if (*itr == '\n')
{
penX = 0;
penY += height;
continue;
}
// Get the glyph for the current character
Glyph* fontGlyph = mFont->getGlyph(*itr);
if (!fontGlyph)
{
continue;
}
// Check the cache first
GLGlyph* drawGlyph = mCache.get(fontGlyph);
if (!drawGlyph)
{
// Cache miss. Ask this renderer to create a new one
drawGlyph = makeGlyph(fontGlyph);
if (!drawGlyph)
{
// AAACK! Couldn't create the glyph. Fail silently.
continue;
}
mCache.put(fontGlyph, drawGlyph);
}
int kerning = mFont->getKerning(last_character, *itr);
last_character = *itr;
int old_x = penX;
penX += kerning;
// Now tell the glyph to render itself.
drawGlyph->render(penX, penY);
penX += fontGlyph->getAdvance();
// Kerning shouldn't make us draw farther and farther to the
// left... this fixes the "sliding dot problem".
penX = std::max(penX, old_x);
}
}
bool CPUFontBase::checkGlyph(unsigned int characterCode)
{
Radiant::Guard g( & m_mutex);
if(m_glyphList->glyph(characterCode) == 0)
{
unsigned int glyphIndex = m_glyphList->fontIndex(characterCode);
Glyph * tempGlyph = makeGlyph(glyphIndex);
if(tempGlyph == 0) {
if(m_error == 0)
m_error = 0x13;
return false;
}
m_glyphList->add(tempGlyph, characterCode);
}
return true;
}