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Henrik Hautakoski 2015-12-22 17:43:51 +01:00
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source/Graphics/Text.cpp Normal file
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#include <Spectre/Graphics/Text.h>
Text::Text() :
m_font (NULL),
m_color (255, 255, 255, 255)
{
}
Text::Text(const std::string text, const Font& font) :
m_font (&font),
m_color (255, 255, 255, 255),
m_geometryNeedsUpdate (true)
{
}
void Text::setString(const std::string& string)
{
m_string = string;
m_geometryNeedsUpdate = true;
}
const std::string& Text::getString() const
{
return m_string;
}
void Text::setFont(const Font& font)
{
m_font = &font;
m_geometryNeedsUpdate = true;
}
const Font* Text::getFont() const
{
return m_font;
}
void Text::setColor(const Color& color)
{
m_color = color;
m_geometryNeedsUpdate = true;
}
const Color& Text::getColor() const
{
return m_color;
}
Vector2f Text::getSize() const
{
Vector2f size;
for(int i = 0; i < m_string.size(); i++) {
Font::Glyph glyph = m_font->getGlyph(m_string[i]);
float h = glyph.size.y;
float w = glyph.advance;
if (h > size.y) {
size.y = h;
}
size.x += w;
}
return size;
}
const Texture* Text::getTexture() const
{
if (m_geometryNeedsUpdate) {
updateGeometry();
m_geometryNeedsUpdate = false;
}
return m_font->getTexture();
}
const std::vector<unsigned short>& Text::getIndices() const
{
return m_indicies;
}
const std::vector<Vertex2D>& Text::getVertices() const
{
if (m_geometryNeedsUpdate) {
updateGeometry();
m_geometryNeedsUpdate = false;
}
return m_vertices;
}
void Text::updateGeometry() const
{
Vector2f origin;
Vector2f size = getSize();
Vector3f color = getColor().toRGBf();
m_vertices.clear();
for(int i = 0; i < m_string.length(); i++) {
Vertex2D v1, v2, v3, v4;
Font::Glyph glyph = m_font->getGlyph(m_string[i]);
if (glyph.texture) {
Vector2f vpos = origin + vec2f(glyph.offset.x, size.y - glyph.offset.y);
Vertex2D v1 = Vertex2D(vpos + vec2f( 0.0f, 0.0f), vec2f(glyph.texture_origin.x, glyph.texture_origin.y));
Vertex2D v2 = Vertex2D(vpos + vec2f( glyph.size.x, 0.0f), vec2f(glyph.texture_origin.x + glyph.size.x, glyph.texture_origin.y));
Vertex2D v3 = Vertex2D(vpos + vec2f( glyph.size.x, glyph.size.y), vec2f(glyph.texture_origin.x + glyph.size.x, glyph.texture_origin.y + glyph.size.y));
Vertex2D v4 = Vertex2D(vpos + vec2f( 0.0f, glyph.size.y), vec2f(glyph.texture_origin.x, glyph.texture_origin.y + glyph.size.y));
v1.color = color;
v2.color = color;
v3.color = color;
v4.color = color;
m_vertices.push_back(v1);
m_vertices.push_back(v2);
m_vertices.push_back(v3);
m_vertices.push_back(v4);
}
origin.x += glyph.advance;
}
int x = 0;
}