More seperate cc files, font & overlay rendering

Overlay.cc

@@ -0,0 +1,53 @@
+#include <vector>
+#include <glbinding/gl/gl.h>
+
+#include "shaders.hh"
+#include "Overlay.hh"
+
+using namespace gl;
+
+Overlay::Overlay(VBOManager& vboManager, std::vector<ovlVertexAttribs> const& vas,
+		 Program& prog)
+  : vboManager_(vboManager), vbo_(vboManager_.alloc(sizeof(ovlVertexAttribs)*vas.size())),
+    prog_(prog), vaID_(0), vertices_(vas.size())
+{
+  glBindBuffer(GL_ARRAY_BUFFER, vbo_.getVBOId());
+  glBufferSubData(GL_ARRAY_BUFFER, vbo_.getOfs(),
+		  sizeof(ovlVertexAttribs)*vas.size(),
+		  static_cast<void const*>(vas.data()));
+
+  glGenVertexArrays(1, &vaID_);
+  try {
+    glBindVertexArray(vaID_);
+    GLint al;
+    if((al = prog_.getAttribLocation("vertex")) != -1) {
+      glEnableVertexAttribArray(al);
+      glVertexAttribPointer(al, 2, GL_SHORT, GL_TRUE, sizeof(ovlVertexAttribs),
+			    (void*)(vbo_.getOfs()+offsetof(ovlVertexAttribs, vertex)));
+    }
+    if((al = prog_.getAttribLocation("vertexTC")) != -1) {
+      glEnableVertexAttribArray(al);
+      glVertexAttribPointer(al, 2, GL_UNSIGNED_SHORT, GL_TRUE,
+			    sizeof(ovlVertexAttribs),
+			    (void*)(vbo_.getOfs()+offsetof(ovlVertexAttribs, texCoords)));
+    }
+  } catch(...) {
+    glDeleteVertexArrays(1, &vaID_);
+    throw;
+  }
+}
+
+Overlay::~Overlay()
+{
+  glDeleteVertexArrays(1, &vaID_);
+}
+
+void Overlay::draw(Program *override) const
+{
+  glBindVertexArray(vaID_);
+  if (override)
+    override->use();
+  else
+    prog_.use();
+  glDrawArrays(GL_TRIANGLES, 0, vertices_);
+}