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