/* Copyright (C) 2022 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. 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.
 *
 * 0 A.D. 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 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "precompiled.h"
#include "Font.h"

#include "graphics/FontManager.h"
#include "ps/Filesystem.h"
#include "ps/CLogger.h"
#include "renderer/Renderer.h"

#include <map>
#include <string>

CFont::GlyphMap::GlyphMap()
{
	memset(m_Data, 0, sizeof(m_Data));
}

CFont::GlyphMap::~GlyphMap()
{
	for (size_t i = 0; i < ARRAY_SIZE(m_Data); i++)
		delete[] m_Data[i];
}

void CFont::GlyphMap::set(u16 i, const GlyphData& val)
{
	if (!m_Data[i >> 8])
		m_Data[i >> 8] = new GlyphData[256]();
	m_Data[i >> 8][i & 0xff] = val;
	m_Data[i >> 8][i & 0xff].defined = 1;
}

int CFont::GetCharacterWidth(wchar_t c) const
{
	const GlyphData* g = m_Glyphs.get(c);

	if (!g)
		g = m_Glyphs.get(0xFFFD); // Use the missing glyph symbol

	if (!g)
		return 0;

	return g->xadvance;
}

void CFont::CalculateStringSize(const wchar_t* string, int& width, int& height) const
{
	width = 0;
	height = m_Height;

	// Compute the width as the width of the longest line.
	int lineWidth = 0;
	for (const wchar_t* c = string; *c != '\0'; c++)
	{
		const GlyphData* g = m_Glyphs.get(*c);

		if (!g)
			g = m_Glyphs.get(0xFFFD); // Use the missing glyph symbol

		if (g)
			lineWidth += g->xadvance; // Add the character's advance distance

		if (*c == L'\n')
		{
			height += m_LineSpacing;
			width = std::max(width, lineWidth);
			lineWidth = 0;
		}
	}
	width = std::max(width, lineWidth);
}