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/* Copyright (C) 2017 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 "FontManager.h"
#include "graphics/Font.h"
#include "graphics/TextureManager.h"
#include "ps/CLogger.h"
#include "ps/CStr.h"
#include "ps/Filesystem.h"
#include "renderer/Renderer.h"
#include <cfloat>
shared_ptr<CFont> CFontManager::LoadFont(CStrIntern fontName)
{
FontsMap::iterator it = m_Fonts.find(fontName);
if (it != m_Fonts.end())
return it->second;
shared_ptr<CFont> font(new CFont());
if (!ReadFont(font.get(), fontName))
{
// Fall back to default font (unless this is the default font)
if (fontName == str_sans_10)
font.reset();
else
font = LoadFont(str_sans_10);
}
m_Fonts[fontName] = font;
return font;
}
bool CFontManager::ReadFont(CFont* font, CStrIntern fontName)
{
const VfsPath path(L"fonts/");
// Read font definition file into a stringstream
shared_ptr<u8> buf;
size_t size;
const VfsPath fntName(fontName.string() + ".fnt");
if (g_VFS->LoadFile(path / fntName, buf, size) < 0)
{
LOGERROR("Failed to open font file %s", (path / fntName).string8());
return false;
}
std::istringstream FNTStream(std::string((const char*)buf.get(), size));
int Version;
FNTStream >> Version;
if (Version != 101) // Make sure this is from a recent version of the font builder
{
LOGERROR("Font %s has invalid version", fontName.c_str());
return 0;
}
int TextureWidth, TextureHeight;
FNTStream >> TextureWidth >> TextureHeight;
std::string Format;
FNTStream >> Format;
if (Format == "rgba")
font->m_HasRGB = true;
else if (Format == "a")
font->m_HasRGB = false;
else
debug_warn(L"Invalid .fnt format string");
int NumGlyphs;
FNTStream >> NumGlyphs;
FNTStream >> font->m_LineSpacing;
FNTStream >> font->m_Height;
font->m_BoundsX0 = FLT_MAX;
font->m_BoundsY0 = FLT_MAX;
font->m_BoundsX1 = -FLT_MAX;
font->m_BoundsY1 = -FLT_MAX;
for (int i = 0; i < NumGlyphs; ++i)
{
int Codepoint, TextureX, TextureY, Width, Height, OffsetX, OffsetY, Advance;
FNTStream >> Codepoint>>TextureX>>TextureY>>Width>>Height>>OffsetX>>OffsetY>>Advance;
if (Codepoint < 0 || Codepoint > 0xFFFF)
{
LOGWARNING("Font %s has invalid codepoint 0x%x", fontName.c_str(), Codepoint);
continue;
}
float u = (float)TextureX / (float)TextureWidth;
float v = (float)TextureY / (float)TextureHeight;
float w = (float)Width / (float)TextureWidth;
float h = (float)Height / (float)TextureHeight;
CFont::GlyphData g = { u, -v, u+w, -v+h, (i16)OffsetX, (i16)-OffsetY, (i16)(OffsetX+Width), (i16)(-OffsetY+Height), (i16)Advance };
font->m_Glyphs.set((u16)Codepoint, g);
font->m_BoundsX0 = std::min(font->m_BoundsX0, (float)g.x0);
font->m_BoundsY0 = std::min(font->m_BoundsY0, (float)g.y0);
font->m_BoundsX1 = std::max(font->m_BoundsX1, (float)g.x1);
font->m_BoundsY1 = std::max(font->m_BoundsY1, (float)g.y1);
}
ENSURE(font->m_Height); // Ensure the height has been found (which should always happen if the font includes an 'I')
// Load glyph texture
const VfsPath imgName(fontName.string() + ".png");
CTextureProperties textureProps(path / imgName);
textureProps.SetFilter(GL_LINEAR);
if (!font->m_HasRGB)
textureProps.SetFormatOverride(GL_ALPHA);
font->m_Texture = g_Renderer.GetTextureManager().CreateTexture(textureProps);
return true;
}
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