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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* font.cc
*
* Sat Nov 12 11:13:41 CET 2011
* Copyright 2011 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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 2 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "font.h"
namespace GUI {
Font::Font(const std::string& fontfile)
: img_font(fontfile)
{
size_t px = 0;
size_t c;
for(c = 0; c < characters.size() && px < img_font.width(); ++c)
{
auto& character = characters[c];
character.offset = px + 1;
if(c > 0)
{
characters[c - 1].width =
character.offset - characters[c - 1].offset - 1;
}
++px;
Colour pixel;
while(px < img_font.width())
{
pixel = img_font.getPixel(px, 0);
// Find next purple pixel in top row:
if((pixel.red == 1) && (pixel.green == 0) &&
(pixel.blue == 1) && (pixel.alpha == 1))
{
break;
}
++px;
}
characters[c] = character;
}
++c;
characters[c - 1].width = characters[c].offset - characters[c - 1].offset - 1;
}
size_t Font::textWidth(const std::string& text) const
{
size_t len = 0;
for(auto cha : text)
{
auto& character = characters[cha];
len += character.width + spacing + character.post_bias;
}
return len;
}
size_t Font::textHeight(const std::string& text) const
{
return img_font.height();
}
void Font::setLetterSpacing(int letter_spacing)
{
spacing = letter_spacing;
}
int Font::letterSpacing() const
{
return spacing;
}
PixelBufferAlpha *Font::render(const std::string& text) const
{
PixelBufferAlpha *pb =
new PixelBufferAlpha(textWidth(text), textHeight(text));
int x_offset = 0;
for(auto cha : text)
{
auto& character = characters[cha];
for(size_t x = 0; x < character.width; ++x)
{
for(size_t y = 0; y < img_font.height(); ++y)
{
Colour c = img_font.getPixel(x + character.offset, y);
pb->setPixel(x + x_offset + character.pre_bias, y,
c.red * 255, c.green * 255, c.blue * 255, c.alpha * 255);
}
}
x_offset += character.width + spacing + character.post_bias;
}
return pb;
}
} // GUI::
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