X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ffont.cpp;h=54631926e4e1b3ae22da55afff111450fc9719e0;hp=61534f0be574a8b0fd485086991157b47b174426;hb=3d8438922e24b787587d0c8f1883c5567a4af573;hpb=a6463a575c64115dc1ab80ec9b350622778a8f9b

diff --git a/source/font.cpp b/source/font.cpp
index 61534f0b..54631926 100644
--- a/source/font.cpp
+++ b/source/font.cpp
@@ -1,3 +1,4 @@
+#include <msp/core/maputils.h>
 #include <msp/datafile/collection.h>
 #include "bindable.h"
 #include "gl.h"
@@ -14,7 +15,13 @@ namespace GL {
 Font::Font():
 	native_size(1),
 	ascent(1),
-	descent(0)
+	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)
@@ -30,35 +37,36 @@ const Texture2D &Font::get_texture() const
 	return *texture;
 }
 
-void Font::add_glyph(unsigned code, float x1, float y1, float x2, float y2, float w, float h, float ox, float oy, float adv)
+void Font::add_glyph(const Glyph &g)
 {
-	Glyph glyph;
-	glyph.code = code;
-	glyph.x1 = x1;
-	glyph.y1 = y1;
-	glyph.x2 = x2;
-	glyph.y2 = y2;
-	glyph.w = w;
-	glyph.h = h;
-	glyph.off_x = ox;
-	glyph.off_y = oy;
-	glyph.advance = adv;
-	glyphs.insert(GlyphMap::value_type(code, glyph));
+	insert_unique(glyphs, g.code, g);
+}
+
+void Font::set_kerning(unsigned l, unsigned r, float d)
+{
+	kerning[KerningKey(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();)
-		x += get_glyph_advance(dec.decode_char(str, i));
+	{
+		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::draw_string(const string &str, StringCodec::Decoder &dec, const Color &color) const
 {
-	Bind bind_tex(get_texture(), true);
+	BindRestore bind_tex(get_texture());
 	Immediate imm((TEXCOORD2, COLOR4_UBYTE, VERTEX2));
 	imm.color(color);
 	build_string(str, dec, imm);
@@ -68,38 +76,52 @@ void Font::build_string(const string &str, StringCodec::Decoder &dec, PrimitiveB
 {
 	MatrixStack::Push push_mtx(bld.matrix());
 
-	bld.begin(QUADS);
+	unsigned prev = 0;
 	for(string::const_iterator i=str.begin(); i!=str.end();)
 	{
-		GlyphMap::const_iterator j = glyphs.find(dec.decode_char(str, i));
+		unsigned c = dec.decode_char(str, i);
+		GlyphMap::const_iterator j = glyphs.find(c);
 		if(j==glyphs.end())
 			continue;
 
-		create_glyph_vertices(j->second, bld);
-		bld.matrix() *= Matrix::translation(j->second.advance, 0, 0);
+		if(prev)
+			bld.matrix() *= Matrix::translation(get_glyph_advance(prev, c), 0, 0);
+
+		create_glyph_quad(j->second, bld);
+		prev = c;
 	}
-	bld.end();
 }
 
-void Font::create_glyph_vertices(const Glyph &glyph, VertexBuilder &bld) const
+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.y1);
-	bld.vertex(glyph.off_x+glyph.w, glyph.off_y);
 	bld.texcoord(glyph.x2, glyph.y2);
 	bld.vertex(glyph.off_x+glyph.w, glyph.off_y+glyph.h);
-	bld.texcoord(glyph.x1, glyph.y2);
-	bld.vertex(glyph.off_x, 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) const
+float Font::get_glyph_advance(unsigned code, unsigned next) const
 {
 	GlyphMap::const_iterator i = glyphs.find(code);
 	if(i==glyphs.end())
 		return 0;
 
-	return i->second.advance;
+	float advance = i->second.advance;
+
+	if(next)
+	{
+		KerningMap::const_iterator j = kerning.find(KerningKey(code, next));
+		if(j!=kerning.end())
+			advance += j->second;
+	}
+
+	return advance;
 }
 
 
@@ -119,10 +141,13 @@ 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("x_height",    &Font::x_height);
 }
 
 void Font::Loader::glyph(unsigned c)
@@ -133,6 +158,11 @@ void Font::Loader::glyph(unsigned c)
 	obj.glyphs.insert(GlyphMap::value_type(c, gl));
 }
 
+void Font::Loader::kerning(unsigned l, unsigned r, float d)
+{
+	obj.kerning[KerningKey(l, r)] = d;
+}
+
 void Font::Loader::texture()
 {
 	RefPtr<Texture2D> tex = new Texture2D;
@@ -156,12 +186,12 @@ Font::Glyph::Loader::Loader(Glyph &g):
 	add("advance",   &Glyph::advance);
 }
 
-void Font::Glyph::Loader::texcoords(float x1, float y1, float x2, float y2)
+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;
+	obj.x1 = x1_;
+	obj.y1 = y1_;
+	obj.x2 = x2_;
+	obj.y2 = y2_;
 }
 
 } // namespace GL