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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "UnscaledFontFreeType.h"
#include "NativeFontResourceFreeType.h"
#include "ScaledFontFreeType.h"
#include "Logging.h"
#include "StackArray.h"
#include FT_MULTIPLE_MASTERS_H
#include FT_TRUETYPE_TABLES_H
#include <dlfcn.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
namespace mozilla::gfx {
bool UnscaledFontFreeType::GetFontFileData(FontFileDataOutput aDataCallback,
void* aBaton) {
if (!mFile.empty()) {
int fd = open(mFile.c_str(), O_RDONLY);
if (fd < 0) {
return false;
}
struct stat buf;
if (fstat(fd, &buf) < 0 ||
// Don't erroneously read directories as files.
!S_ISREG(buf.st_mode) ||
// Verify the file size fits in a uint32_t.
buf.st_size <= 0 || off_t(uint32_t(buf.st_size)) != buf.st_size) {
close(fd);
return false;
}
uint32_t length = buf.st_size;
uint8_t* fontData = reinterpret_cast<uint8_t*>(
mmap(nullptr, length, PROT_READ, MAP_PRIVATE, fd, 0));
close(fd);
if (fontData == MAP_FAILED) {
return false;
}
aDataCallback(fontData, length, mIndex, aBaton);
munmap(fontData, length);
return true;
}
bool success = false;
FT_ULong length = 0;
// Request the SFNT file. This may not always succeed for all font types.
if (FT_Load_Sfnt_Table(mFace->GetFace(), 0, 0, nullptr, &length) ==
FT_Err_Ok) {
uint8_t* fontData = new uint8_t[length];
if (FT_Load_Sfnt_Table(mFace->GetFace(), 0, 0, fontData, &length) ==
FT_Err_Ok) {
aDataCallback(fontData, length, 0, aBaton);
success = true;
}
delete[] fontData;
}
return success;
}
bool UnscaledFontFreeType::GetFontDescriptor(FontDescriptorOutput aCb,
void* aBaton) {
if (mFile.empty()) {
return false;
}
aCb(reinterpret_cast<const uint8_t*>(mFile.data()), mFile.size(), mIndex,
aBaton);
return true;
}
RefPtr<SharedFTFace> UnscaledFontFreeType::InitFace() {
if (mFace) {
return mFace;
}
if (mFile.empty()) {
return nullptr;
}
mFace = Factory::NewSharedFTFace(nullptr, mFile.c_str(), mIndex);
if (!mFace) {
gfxWarning() << "Failed initializing FreeType face from filename";
return nullptr;
}
return mFace;
}
void UnscaledFontFreeType::GetVariationSettingsFromFace(
std::vector<FontVariation>* aVariations, FT_Face aFace) {
if (!aFace || !(aFace->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) {
return;
}
typedef FT_Error (*GetVarFunc)(FT_Face, FT_MM_Var**);
typedef FT_Error (*DoneVarFunc)(FT_Library, FT_MM_Var*);
typedef FT_Error (*GetVarDesignCoordsFunc)(FT_Face, FT_UInt, FT_Fixed*);
#if MOZ_TREE_FREETYPE
GetVarFunc getVar = &FT_Get_MM_Var;
DoneVarFunc doneVar = &FT_Done_MM_Var;
GetVarDesignCoordsFunc getCoords = &FT_Get_Var_Design_Coordinates;
#else
static GetVarFunc getVar;
static DoneVarFunc doneVar;
static GetVarDesignCoordsFunc getCoords;
static bool firstTime = true;
if (firstTime) {
firstTime = false;
getVar = (GetVarFunc)dlsym(RTLD_DEFAULT, "FT_Get_MM_Var");
doneVar = (DoneVarFunc)dlsym(RTLD_DEFAULT, "FT_Done_MM_Var");
getCoords = (GetVarDesignCoordsFunc)dlsym(RTLD_DEFAULT,
"FT_Get_Var_Design_Coordinates");
}
if (!getVar || !getCoords) {
return;
}
#endif
FT_MM_Var* mmVar = nullptr;
if ((*getVar)(aFace, &mmVar) == FT_Err_Ok) {
aVariations->reserve(mmVar->num_axis);
StackArray<FT_Fixed, 32> coords(mmVar->num_axis);
if ((*getCoords)(aFace, mmVar->num_axis, coords.data()) == FT_Err_Ok) {
bool changed = false;
for (uint32_t i = 0; i < mmVar->num_axis; i++) {
if (coords[i] != mmVar->axis[i].def) {
changed = true;
}
aVariations->push_back(FontVariation{uint32_t(mmVar->axis[i].tag),
float(coords[i] / 65536.0)});
}
if (!changed) {
aVariations->clear();
}
}
if (doneVar) {
(*doneVar)(aFace->glyph->library, mmVar);
} else {
free(mmVar);
}
}
}
void UnscaledFontFreeType::ApplyVariationsToFace(
const FontVariation* aVariations, uint32_t aNumVariations, FT_Face aFace) {
if (!aFace || !(aFace->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) {
return;
}
typedef FT_Error (*SetVarDesignCoordsFunc)(FT_Face, FT_UInt, FT_Fixed*);
#ifdef MOZ_TREE_FREETYPE
SetVarDesignCoordsFunc setCoords = &FT_Set_Var_Design_Coordinates;
#else
typedef FT_Error (*SetVarDesignCoordsFunc)(FT_Face, FT_UInt, FT_Fixed*);
static SetVarDesignCoordsFunc setCoords;
static bool firstTime = true;
if (firstTime) {
firstTime = false;
setCoords = (SetVarDesignCoordsFunc)dlsym(RTLD_DEFAULT,
"FT_Set_Var_Design_Coordinates");
}
if (!setCoords) {
return;
}
#endif
StackArray<FT_Fixed, 32> coords(aNumVariations);
for (uint32_t i = 0; i < aNumVariations; i++) {
coords[i] = std::round(aVariations[i].mValue * 65536.0f);
}
if ((*setCoords)(aFace, aNumVariations, coords.data()) != FT_Err_Ok) {
// ignore the problem?
}
}
#ifdef MOZ_WIDGET_ANDROID
already_AddRefed<ScaledFont> UnscaledFontFreeType::CreateScaledFont(
Float aGlyphSize, const uint8_t* aInstanceData,
uint32_t aInstanceDataLength, const FontVariation* aVariations,
uint32_t aNumVariations) {
if (aInstanceDataLength < sizeof(ScaledFontFreeType::InstanceData)) {
gfxWarning() << "FreeType scaled font instance data is truncated.";
return nullptr;
}
const ScaledFontFreeType::InstanceData& instanceData =
*reinterpret_cast<const ScaledFontFreeType::InstanceData*>(aInstanceData);
RefPtr<SharedFTFace> face(InitFace());
if (!face) {
gfxWarning() << "Attempted to deserialize FreeType scaled font without "
"FreeType face";
return nullptr;
}
if (aNumVariations > 0 && face->GetData()) {
if (RefPtr<SharedFTFace> varFace = face->GetData()->CloneFace()) {
face = varFace;
}
}
// Only apply variations if we have an explicitly cloned face.
if (aNumVariations > 0 && face != GetFace()) {
ApplyVariationsToFace(aVariations, aNumVariations, face->GetFace());
}
RefPtr<ScaledFontFreeType> scaledFont = new ScaledFontFreeType(
std::move(face), this, aGlyphSize, instanceData.mApplySyntheticBold);
return scaledFont.forget();
}
already_AddRefed<ScaledFont> UnscaledFontFreeType::CreateScaledFontFromWRFont(
Float aGlyphSize, const wr::FontInstanceOptions* aOptions,
const wr::FontInstancePlatformOptions* aPlatformOptions,
const FontVariation* aVariations, uint32_t aNumVariations) {
ScaledFontFreeType::InstanceData instanceData(aOptions, aPlatformOptions);
return CreateScaledFont(aGlyphSize, reinterpret_cast<uint8_t*>(&instanceData),
sizeof(instanceData), aVariations, aNumVariations);
}
already_AddRefed<UnscaledFont> UnscaledFontFreeType::CreateFromFontDescriptor(
const uint8_t* aData, uint32_t aDataLength, uint32_t aIndex) {
if (aDataLength == 0) {
gfxWarning() << "FreeType font descriptor is truncated.";
return nullptr;
}
const char* path = reinterpret_cast<const char*>(aData);
RefPtr<UnscaledFont> unscaledFont =
new UnscaledFontFreeType(std::string(path, aDataLength), aIndex);
return unscaledFont.forget();
}
#endif // MOZ_WIDGET_ANDROID
} // namespace mozilla::gfx
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