Rearrange soucre files into subdirectories

[libs/gl.git] / source / builders / font.cpp

diff --git a/source/builders/font.cpp b/source/builders/font.cpp
new file mode 100644 (file)
index 0000000..5990c57
--- /dev/null
+++ b/source/builders/font.cpp
@@ -0,0 +1,224 @@
+#include <msp/core/maputils.h>
+#include <msp/datafile/collection.h>
+#include "bindable.h"
+#include "gl.h"
+#include "font.h"
+#include "primitivebuilder.h"
+#include "texture2d.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+Font::Font():
+       native_size(1),
+       ascent(1),
+       descent(0),
+       cap_height(1),
+       x_height(0.5)
+{ }
+
+// Avoid synthesizing ~RefPtr in files including font.h
+Font::~Font()
+{ }
+
+void Font::set_texture(const Texture2D &t)
+{
+       texture = &t;
+       texture.keep();
+}
+
+const Texture2D &Font::get_texture() const
+{
+       if(!texture)
+               throw logic_error("No texture");
+       return *texture;
+}
+
+void Font::add_glyph(const Glyph &g)
+{
+       insert_unique(glyphs, g.code, g);
+}
+
+void Font::set_kerning(unsigned l, unsigned r, float d)
+{
+       kerning[CodePair(l, r)] = d;
+}
+
+float Font::get_string_width(const string &str, StringCodec::Decoder &dec) const
+{
+       float x = 0;
+
+       unsigned prev = 0;
+       for(string::const_iterator i=str.begin(); i!=str.end();)
+       {
+               unsigned c = dec.decode_char(str, i);
+               if(prev)
+                       x += get_glyph_advance(prev, c);
+               prev = c;
+       }
+       x += get_glyph_advance(prev);
+
+       return x;
+}
+
+void Font::build_string(const string &str, StringCodec::Decoder &dec, PrimitiveBuilder &bld) const
+{
+       VertexBuilder::PushMatrix push_mtx(bld);
+
+       unsigned prev = 0;
+       unsigned next = 0;
+       for(string::const_iterator i=str.begin(); (next || i!=str.end());)
+       {
+               unsigned c = (next ? next : dec.decode_char(str, i));
+               next = (i!=str.end() ? dec.decode_char(str, i) : 0);
+
+               if(unsigned lig = get_ligature(c, next))
+               {
+                       c = lig;
+                       next = 0;
+               }
+
+               GlyphMap::const_iterator j = glyphs.find(c);
+               if(j==glyphs.end())
+                       continue;
+
+               if(prev)
+                       bld.transform(Matrix::translation(get_glyph_advance(prev, c), 0, 0));
+
+               create_glyph_quad(j->second, bld);
+               prev = c;
+       }
+}
+
+void Font::create_glyph_quad(const Glyph &glyph, PrimitiveBuilder &bld) const
+{
+       bld.begin(TRIANGLE_STRIP);
+       bld.texcoord(glyph.x1, glyph.y2);
+       bld.vertex(glyph.off_x, glyph.off_y+glyph.h);
+       bld.texcoord(glyph.x1, glyph.y1);
+       bld.vertex(glyph.off_x, glyph.off_y);
+       bld.texcoord(glyph.x2, glyph.y2);
+       bld.vertex(glyph.off_x+glyph.w, glyph.off_y+glyph.h);
+       bld.texcoord(glyph.x2, glyph.y1);
+       bld.vertex(glyph.off_x+glyph.w, glyph.off_y);
+       bld.end();
+}
+
+float Font::get_glyph_advance(unsigned code, unsigned next) const
+{
+       GlyphMap::const_iterator i = glyphs.find(code);
+       if(i==glyphs.end())
+               return 0;
+
+       float advance = i->second.advance;
+
+       if(next)
+       {
+               KerningMap::const_iterator j = kerning.find(CodePair(code, next));
+               if(j!=kerning.end())
+                       advance += j->second;
+       }
+
+       return advance;
+}
+
+unsigned Font::get_ligature(unsigned code, unsigned next) const
+{
+       LigatureMap::const_iterator i = ligatures.find(CodePair(code, next));
+       return (i!=ligatures.end() ? i->second : 0);
+}
+
+
+Font::Glyph::Glyph():
+       code(0),
+       x1(0),
+       y1(0),
+       x2(1),
+       y2(1),
+       w(1),
+       h(1),
+       off_x(0),
+       off_y(0),
+       advance(1)
+{ }
+
+
+Font::Loader::Loader(Font &f):
+       DataFile::CollectionObjectLoader<Font>(f, 0)
+{
+       init();
+}
+
+Font::Loader::Loader(Font &f, Collection &c):
+       DataFile::CollectionObjectLoader<Font>(f, &c)
+{
+       init();
+}
+
+void Font::Loader::init()
+{
+       add("native_size", &Font::native_size);
+       add("ascent",      &Font::ascent);
+       add("cap_height",  &Font::cap_height);
+       add("descent",     &Font::descent);
+       add("texture",     &Loader::texture);
+       add("texture",     &Loader::texture_ref);
+       add("glyph",       &Loader::glyph);
+       add("kerning",     &Loader::kerning);
+       add("ligature",    &Loader::ligature);
+       add("x_height",    &Font::x_height);
+}
+
+void Font::Loader::glyph(unsigned c)
+{
+       Glyph gl;
+       gl.code = c;
+       load_sub(gl);
+       obj.glyphs.insert(GlyphMap::value_type(c, gl));
+}
+
+void Font::Loader::kerning(unsigned l, unsigned r, float d)
+{
+       obj.kerning[CodePair(l, r)] = d;
+}
+
+void Font::Loader::ligature(unsigned l, unsigned r, unsigned g)
+{
+       obj.ligatures[CodePair(l, r)] = g;
+}
+
+void Font::Loader::texture()
+{
+       RefPtr<Texture2D> tex = new Texture2D;
+       load_sub(*tex);
+       obj.texture = tex;
+}
+
+void Font::Loader::texture_ref(const string &name)
+{
+       obj.texture = &get_collection().get<Texture2D>(name);
+       obj.texture.keep();
+}
+
+
+Font::Glyph::Loader::Loader(Glyph &g):
+       DataFile::ObjectLoader<Glyph>(g)
+{
+       add("texcoords", &Loader::texcoords);
+       add("size",      &Glyph::w,     &Glyph::h);
+       add("offset",    &Glyph::off_x, &Glyph::off_y);
+       add("advance",   &Glyph::advance);
+}
+
+void Font::Glyph::Loader::texcoords(float x1_, float y1_, float x2_, float y2_)
+{
+       obj.x1 = x1_;
+       obj.y1 = y1_;
+       obj.x2 = x2_;
+       obj.y2 = y2_;
+}
+
+} // namespace GL
+} // namespace Msp