Initial commit of ResInsight version 0.4.8

VisualizationModules/LibRender/cvfFont.cpp

@@ -0,0 +1,100 @@
+//##################################################################################################
+//
+//   Custom Visualization Core library
+//   Copyright (C) 2011-2012 Ceetron AS
+//    
+//   This library is free software: you can redistribute it and/or modify 
+//   it under the terms of the GNU General Public License as published by 
+//   the Free Software Foundation, either version 3 of the License, or 
+//   (at your option) any later version. 
+//    
+//   This library is distributed in the hope that it will be useful, but WITHOUT ANY 
+//   WARRANTY; without even the implied warranty of MERCHANTABILITY or 
+//   FITNESS FOR A PARTICULAR PURPOSE.   
+//    
+//   See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>> 
+//   for more details. 
+//
+//##################################################################################################
+
+#include "cvfBase.h"
+#include "cvfFont.h"
+#include "cvfGlyph.h"
+
+
+namespace cvf {
+
+//==================================================================================================
+///
+/// \class cvf::Font
+/// \ingroup Render
+///
+/// Pure virtual font base class used to generate glyphs for a given character.
+//==================================================================================================
+
+//--------------------------------------------------------------------------------------------------
+/// Constructor
+//--------------------------------------------------------------------------------------------------
+Font::Font()
+{
+
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// Destructor
+//--------------------------------------------------------------------------------------------------
+Font::~Font()
+{
+
+}
+
+
+//--------------------------------------------------------------------------------------------------
+/// Get the extent (width and height) of the given text with this font in pixels
+//--------------------------------------------------------------------------------------------------
+cvf::Vec2ui Font::textExtent(const String& text)
+{
+    Vec2ui textBB(0,0);
+
+    int minHeight = std::numeric_limits<int>::max();
+    int maxHeight = std::numeric_limits<int>::min();
+
+    size_t numCharacters = text.size();
+    for (size_t j = 0; j < numCharacters; j++)
+    {
+        wchar_t character = text[j];
+        ref<Glyph> glyph = getGlyph(character);
+
+        // Find bottom and top with regards to baseline (Y = 0)
+        int minY = static_cast<int>(glyph->horizontalBearingY()) - static_cast<int>(glyph->height());
+        int maxY = glyph->horizontalBearingY();
+
+        if (minHeight > minY) minHeight = minY;
+        if (maxHeight < maxY) maxHeight = maxY;
+
+        uint charWidth  = 0;
+
+        if (j < (numCharacters - 1))
+        {
+            charWidth = advance(character, text[j + 1]);
+        }
+        else
+        {
+            charWidth  = glyph->width() + glyph->horizontalBearingX();
+        }
+
+        textBB.x() += charWidth;
+    }
+
+    if (maxHeight < minHeight)
+    {
+        return Vec2ui(0,0);
+    }
+
+    textBB.y() = static_cast<uint>(maxHeight - minHeight);
+
+    return textBB;
+}
+
+}  // namespace cvf