Support embedding textures inside font files

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

diff --git a/source/font.cpp b/source/font.cpp
index a19a94e5d13b22670e13c361689669b3d5b71db4..f82b45d8ac81fe7bb3ac30b7f70be453b2a720b7 100644 (file)
--- a/source/font.cpp
+++ b/source/font.cpp
@@ -5,8 +5,10 @@ Copyright © 2007  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
-#include <GL/gl.h>
+#include "gl.h"
 #include "font.h"
+#include "immediate.h"
+#include "primitivetype.h"
 #include "texture2d.h"
 
 using namespace std;
@@ -16,15 +18,32 @@ namespace GL {
 
 Font::Font():
        tex(0),
+       own_tex(false),
        default_size(1),
        ascent(1),
-       descent(0),
-       varray((TEXCOORD2, VERTEX2))
+       descent(0)
 { }
 
+Font::~Font()
+{
+       if(own_tex)
+               delete tex;
+}
+
 void Font::set_texture(const Texture2D &t)
 {
+       if(own_tex)
+               delete tex;
+
        tex=&t;
+       own_tex=false;
+}
+
+const Texture2D &Font::get_texture() const
+{
+       if(!tex)
+               throw InvalidState("No texture");
+       return *tex;
 }
 
 void Font::add_glyph(unsigned code, float x1, float y1, float x2, float y2, float w, float h, float ox, float oy, float adv)
@@ -40,21 +59,7 @@ void Font::add_glyph(unsigned code, float x1, float y1, float x2, float y2, floa
        glyph.off_x=ox;
        glyph.off_y=oy;
        glyph.advance=adv;
-       glyph.index=glyphs.size();
        glyphs.insert(GlyphMap::value_type(code, glyph));
-
-       RefPtr<VertexArrayBuilder> va_builder=varray.modify();
-       create_glyph_vertices(glyph, *va_builder);
-}
-
-float Font::get_string_width(const string &str) const
-{
-       float x=0;
-
-       for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
-               x+=get_glyph_advance(static_cast<unsigned char>(*i));
-
-       return x;
 }
 
 float Font::get_string_width(const string &str, Codecs::Decoder &dec) const
@@ -67,67 +72,46 @@ float Font::get_string_width(const string &str, Codecs::Decoder &dec) const
        return x;
 }
 
-void Font::draw_string(const string &str) const
+void Font::draw_string(const string &str, Codecs::Decoder &dec) const
 {
-       prepare_render();
-
-       for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
-               draw_glyph(static_cast<unsigned char>(*i));
-
-       glPopMatrix();
+       Immediate imm((TEXCOORD2, VERTEX2));
+       draw_string(str, dec, imm);
 }
 
-void Font::draw_string(const string &str, Codecs::Decoder &dec) const
+void Font::draw_string(const string &str, Codecs::Decoder &dec, PrimitiveBuilder &pbuilder) const
 {
-       prepare_render();
+       if(!tex)
+               throw InvalidState("No texture");
 
-       for(string::const_iterator i=str.begin(); i!=str.end();)
-               draw_glyph(dec.decode_char(str, i));
-
-       glPopMatrix();
-}
+       tex->bind();
 
-void Font::create_glyph_vertices()
-{
-       varray.clear();
-       RefPtr<VertexArrayBuilder> va_builder=varray.modify();
+       float x=0;
+       unsigned count=0;
 
-       unsigned n=0;
-       for(GlyphMap::iterator i=glyphs.begin(); i!=glyphs.end(); ++i, ++n)
+       pbuilder.begin(QUADS);
+       for(string::const_iterator i=str.begin(); i!=str.end();)
        {
-               i->second.index=n;
-               create_glyph_vertices(i->second, *va_builder);
-       }
-}
+               GlyphMap::const_iterator j=glyphs.find(dec.decode_char(str, i));
+               if(j==glyphs.end())
+                       continue;
 
-void Font::create_glyph_vertices(const Glyph &glyph, VertexArrayBuilder &va_builder)
-{
-       va_builder.texcoord(glyph.x1, glyph.y1);
-       va_builder.vertex(glyph.off_x, glyph.off_y);
-       va_builder.texcoord(glyph.x2, glyph.y1);
-       va_builder.vertex(glyph.off_x+glyph.w, glyph.off_y);
-       va_builder.texcoord(glyph.x2, glyph.y2);
-       va_builder.vertex(glyph.off_x+glyph.w, glyph.off_y+glyph.h);
-       va_builder.texcoord(glyph.x1, glyph.y2);
-       va_builder.vertex(glyph.off_x, glyph.off_y+glyph.h);
-}
-
-void Font::prepare_render() const
-{
-       tex->bind();
-       varray.apply();
-       glPushMatrix();
+               create_glyph_vertices(j->second, pbuilder, x);
+               x+=j->second.advance;
+               count+=4;
+       }
+       pbuilder.end();
 }
 
-void Font::draw_glyph(unsigned code) const
+void Font::create_glyph_vertices(const Glyph &glyph, VertexBuilder &vbuilder, float x) const
 {
-       GlyphMap::const_iterator i=glyphs.find(code);
-       if(i==glyphs.end())
-               return;
-
-       glDrawArrays(GL_QUADS, i->second.index*4, 4);
-
-       glTranslatef(i->second.advance, 0, 0);
+       vbuilder.texcoord(glyph.x1, glyph.y1);
+       vbuilder.vertex(x+glyph.off_x, glyph.off_y);
+       vbuilder.texcoord(glyph.x2, glyph.y1);
+       vbuilder.vertex(x+glyph.off_x+glyph.w, glyph.off_y);
+       vbuilder.texcoord(glyph.x2, glyph.y2);
+       vbuilder.vertex(x+glyph.off_x+glyph.w, glyph.off_y+glyph.h);
+       vbuilder.texcoord(glyph.x1, glyph.y2);
+       vbuilder.vertex(x+glyph.off_x, glyph.off_y+glyph.h);
 }
 
 float Font::get_glyph_advance(unsigned code) const
@@ -161,17 +145,13 @@ DataFile::Collection &Font::Loader::get_collection()
        return *coll;
 }
 
-Font::Loader::~Loader()
-{
-       font.create_glyph_vertices();
-}
-
 void Font::Loader::init()
 {
        add("default_size", &Font::default_size);
        add("ascent",  &Font::ascent);
        add("descent", &Font::descent);
        add("texture", &Font::tex);
+       add("texture_inline", &Loader::texture_inline);
        add("glyph",   &Loader::glyph);
 }
 
@@ -183,6 +163,14 @@ void Font::Loader::glyph(unsigned c)
        font.glyphs.insert(GlyphMap::value_type(c, gl));
 }
 
+void Font::Loader::texture_inline()
+{
+       RefPtr<Texture2D> tex=new Texture2D;
+       load_sub(*tex);
+       font.tex=tex.release();
+       font.own_tex=true;
+}
+
 
 Font::Glyph::Loader::Loader(Glyph &g):
        glyph(g)