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//========================================================================
//
// SplashFontEngine.cc
//
//========================================================================
//========================================================================
//
// Modified under the Poppler project - http://poppler.freedesktop.org
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2006 Takashi Iwai <tiwai@suse.de>
// Copyright (C) 2009 Petr Gajdos <pgajdos@novell.com>
// Copyright (C) 2009 Kovid Goyal <kovid@kovidgoyal.net>
// Copyright (C) 2009, 2024, 2025 Albert Astals Cid <aacid@kde.org>
// Copyright (C) 2011 Andreas Hartmetz <ahartmetz@gmail.com>
// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
// Copyright (C) 2015 Dmytro Morgun <lztoad@gmail.com>
// Copyright (C) 2017 Adrian Johnson <ajohnson@redneon.com>
// Copyright (C) 2018 Oliver Sander <oliver.sander@tu-dresden.de>
// Copyright (C) 2019 Christian Persch <chpe@src.gnome.org>
// Copyright (C) 2024, 2025 g10 Code GmbH, Author: Sune Stolborg Vuorela <sune@vuorela.dk>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================
#include <config.h>
#include <algorithm>
#include "SplashMath.h"
#include "SplashFTFontEngine.h"
#include "SplashFontFile.h"
#include "SplashFontFileID.h"
#include "SplashFont.h"
#include "SplashFontEngine.h"
//------------------------------------------------------------------------
// SplashFontEngine
//------------------------------------------------------------------------
SplashFontEngine::SplashFontEngine(bool enableFreeType, bool enableFreeTypeHinting, bool enableSlightHinting, bool aa)
{
std::ranges::fill(fontCache, nullptr);
if (enableFreeType) {
ftEngine = SplashFTFontEngine::init(aa, enableFreeTypeHinting, enableSlightHinting);
} else {
ftEngine = nullptr;
}
}
SplashFontEngine::~SplashFontEngine()
{
for (auto font : fontCache) {
delete font;
}
delete ftEngine;
}
SplashFontFile *SplashFontEngine::getFontFile(const SplashFontFileID &id)
{
for (auto font : fontCache) {
if (font) {
SplashFontFile *fontFile = font->getFontFile();
if (fontFile && fontFile->getID().matches(id)) {
return fontFile;
}
}
}
return nullptr;
}
SplashFontFile *SplashFontEngine::loadType1Font(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, const char **enc, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadType1Font(std::move(idA), src, enc, faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
SplashFontFile *SplashFontEngine::loadType1CFont(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, const char **enc, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadType1CFont(std::move(idA), src, enc, faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
SplashFontFile *SplashFontEngine::loadOpenTypeT1CFont(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, const char **enc, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadOpenTypeT1CFont(std::move(idA), src, enc, faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
SplashFontFile *SplashFontEngine::loadCIDFont(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadCIDFont(std::move(idA), src, faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
SplashFontFile *SplashFontEngine::loadOpenTypeCFFFont(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, std::vector<int> &&codeToGID, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadOpenTypeCFFFont(std::move(idA), src, std::move(codeToGID), faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
SplashFontFile *SplashFontEngine::loadTrueTypeFont(std::unique_ptr<SplashFontFileID> idA, SplashFontSrc *src, std::vector<int> &&codeToGID, int faceIndex)
{
SplashFontFile *fontFile = nullptr;
if (ftEngine) {
fontFile = ftEngine->loadTrueTypeFont(std::move(idA), src, std::move(codeToGID), faceIndex);
}
// delete the (temporary) font file -- with Unix hard link
// semantics, this will remove the last link; otherwise it will
// return an error, leaving the file to be deleted later (if
// loadXYZFont failed, the file will always be deleted)
if (src->isFile) {
src->unref();
}
return fontFile;
}
bool SplashFontEngine::getAA()
{
return (ftEngine == nullptr) ? false : ftEngine->getAA();
}
void SplashFontEngine::setAA(bool aa)
{
if (ftEngine != nullptr) {
ftEngine->setAA(aa);
}
}
SplashFont *SplashFontEngine::getFont(SplashFontFile *fontFile, const std::array<SplashCoord, 4> &textMat, const std::array<SplashCoord, 6> &ctm)
{
std::array<SplashCoord, 4> mat;
mat[0] = textMat[0] * ctm[0] + textMat[1] * ctm[2];
mat[1] = -(textMat[0] * ctm[1] + textMat[1] * ctm[3]);
mat[2] = textMat[2] * ctm[0] + textMat[3] * ctm[2];
mat[3] = -(textMat[2] * ctm[1] + textMat[3] * ctm[3]);
if (!splashCheckDet(mat[0], mat[1], mat[2], mat[3], 0.01)) {
// avoid a singular (or close-to-singular) matrix
mat[0] = 0.01;
mat[1] = 0;
mat[2] = 0;
mat[3] = 0.01;
}
// Try to find the font in the cache
auto fontIt = std::ranges::find_if(fontCache, [&](const SplashFont *font) { return font && font->matches(fontFile, mat, textMat); });
// The requested font has been found in the cache
if (fontIt != fontCache.end()) {
std::rotate(fontCache.begin(), fontIt, fontIt + 1);
return fontCache[0];
}
// The requested font has not been found in the cache
auto newFont = fontFile->makeFont(mat, textMat);
if (fontCache.back()) {
delete fontCache.back();
}
std::ranges::rotate(fontCache, fontCache.end() - 1);
fontCache[0] = newFont;
return fontCache[0];
}
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