X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Frender%2Ftext.cpp;fp=source%2Frender%2Ftext.cpp;h=b408bbe1780040cef29e600d2dab1b504b2d41b8;hb=7aaec9a70b8d7733429bec043f8e33e02956f266;hp=0000000000000000000000000000000000000000;hpb=bec07999d95b76f4b47cffcc564d0cd0afc0435e;p=libs%2Fgl.git

diff --git a/source/render/text.cpp b/source/render/text.cpp
new file mode 100644
index 00000000..b408bbe1
--- /dev/null
+++ b/source/render/text.cpp
@@ -0,0 +1,99 @@
+#include "meshbuilder.h"
+#include "text.h"
+#include "texture2d.h"
+
+using namespace std;
+
+namespace Msp {
+namespace GL {
+
+Text::Text(const Font &f, const Technique *tech):
+	font(f),
+	mesh((TEXCOORD2, VERTEX2)),
+	horz_align(0.0f),
+	vert_offset(0.0f),
+	width(0.0f)
+{
+	object.set_mesh(&mesh);
+	if(tech)
+		set_technique(tech);
+}
+
+void Text::set_technique(const Technique *tech)
+{
+	if(tech)
+	{
+		technique = *tech;
+		technique.replace_texture("diffuse_map", font.get_texture());
+		object.set_technique(&technique);
+	}
+	else
+		object.set_technique(0);
+}
+
+void Text::set_text(const string &text, StringCodec::Decoder &dec)
+{
+	clear();
+	width = font.get_string_width(text, dec);
+	MeshBuilder bld(mesh);
+	bld.transform(Matrix::translation(Vector3(-horz_align*width, vert_offset, 0.0f)));
+	font.build_string(text, dec, bld);
+}
+
+void Text::clear()
+{
+	mesh.clear();
+	width = 0;
+}
+
+void Text::set_alignment(HorizontalAlign ha, VerticalAlign va)
+{
+	float h;
+	switch(ha)
+	{
+	case LEFT: h = 0.0f; break;
+	case CENTER: h = 0.5f; break;
+	case RIGHT: h = 1.0f; break;
+	default: throw invalid_argument("Text::set_alignment");
+	}
+
+	float v;
+	switch(va)
+	{
+	case DESCENT: v = -font.get_descent(); break;
+	case BASELINE: v = 0.0f; break;
+	case MIDLINE: v = font.get_cap_height()/2; break;
+	case ASCENT: v = font.get_ascent(); break;
+	default: throw invalid_argument("Text::set_alignment");
+	}
+
+	set_alignment(h, v);
+}
+
+void Text::set_alignment(float h, float v)
+{
+	if(h==horz_align && -v==vert_offset)
+		return;
+
+	float horz_adjust = (horz_align-h)*width;
+	float vert_adjust = -v-vert_offset;
+	horz_align = h;
+	vert_offset = -v;
+
+	unsigned pos_offset = mesh.get_vertices().get_format().offset(VERTEX2);
+	unsigned n_vertices = mesh.get_n_vertices();
+	for(unsigned i=0; i<n_vertices; ++i)
+	{
+		float *pos = mesh.modify_vertex(i)+pos_offset;
+		pos[0] += horz_adjust;
+		pos[1] += vert_adjust;
+	}
+}
+
+void Text::render(Renderer &renderer, const Tag &tag) const
+{
+	object.render(renderer, tag);
+}
+
+} // namespace GL
+} // namespace Msp