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authorBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:09:43 +0100
committerBent Bisballe Nyeng <deva@aasimon.org>2020-12-29 16:39:54 +0100
commit645250e1cd8ce9bc1faea599df7a1b05836bfeb8 (patch)
treec6311afab3900d2dd2aecbfbe1ac348d0e48c428 /dggui/font.cc
parentdce64999d3325c5b55499d6ba657066efa48fbff (diff)
Split UI code into application/plugin UI and UI library.
Diffstat (limited to 'dggui/font.cc')
-rw-r--r--dggui/font.cc136
1 files changed, 136 insertions, 0 deletions
diff --git a/dggui/font.cc b/dggui/font.cc
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+++ b/dggui/font.cc
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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 Lesser General Public License as published by
+ * the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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"
+
+#include <cassert>
+
+namespace GUI
+{
+
+Font::Font(const std::string& fontfile)
+ : img_font(fontfile)
+{
+ std::size_t px = 0;
+ std::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)
+ {
+ assert(character.offset >= characters[c - 1].offset);
+ characters[c - 1].width = character.offset - characters[c - 1].offset;
+ if(characters[c].offset != characters[c - 1].offset)
+ {
+ --characters[c - 1].width;
+ }
+ }
+
+ ++px;
+
+ while(px < img_font.width())
+ {
+ auto& pixel = img_font.getPixel(px, 0);
+
+ // Find next purple pixel in top row:
+ if((pixel.red() == 255) && (pixel.green() == 0) &&
+ (pixel.blue() == 255) && (pixel.alpha() == 255))
+ {
+ break;
+ }
+
+ ++px;
+ }
+
+ characters[c] = character;
+ }
+
+ --c;
+
+ assert(characters[c].offset >= characters[c - 1].offset);
+ characters[c - 1].width = characters[c].offset - characters[c - 1].offset;
+ if(characters[c].offset != characters[c - 1].offset)
+ {
+ --characters[c - 1].width;
+ }
+}
+
+size_t Font::textWidth(const std::string& text) const
+{
+ size_t len = 0;
+
+ for(unsigned char 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 letterSpacing)
+{
+ spacing = letterSpacing;
+}
+
+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(std::size_t i = 0; i < text.length(); ++i)
+ {
+ unsigned char cha = text[i];
+ auto& character = characters.at(cha);
+ for(size_t x = 0; x < character.width; ++x)
+ {
+ for(size_t y = 0; y < img_font.height(); ++y)
+ {
+ auto& c = img_font.getPixel(x + character.offset, y);
+ pb->setPixel(x + x_offset + character.pre_bias, y, c);
+ }
+ }
+ x_offset += character.width + spacing + character.post_bias;
+ }
+
+ return pb;
+}
+
+} // GUI::