parse info from type 1 fonts

src/pdf/font.rs

@@ -1,15 +1,21 @@
 use crate::{
     pdf::{
         object::{
-            IsPdfNull, PdfDictionary, PdfName, PdfObject, PdfObjectDirect, PdfRectangle, PdfStream,
-            PdfString,
+            IsPdfNull, PdfArray, PdfDictionary, PdfMatrix, PdfName, PdfNameOrInteger, PdfObject,
+            PdfObjectDirect, PdfRectangle, PdfStream, PdfString,
+        },
+        parse::{
+            GetPdfInputPosition, PdfInputPosition, PdfInputPositionNoCompare, PdfParse,
+            PdfParseError,
         },
-        parse::{PdfParse, PdfParseError},
         pdf_parse,
     },
-    util::DagDebugState,
+    util::{ArcOrRef, DagDebugState},
 };
-use std::{borrow::Cow, fmt, sync::Arc};
+use std::{borrow::Cow, collections::BTreeMap, fmt, sync::Arc};
+
+mod tables;
+mod type_1_parse;
 
 pdf_parse! {
     #[pdf(transparent)]
@@ -108,7 +114,7 @@ pdf_parse! {
         #[pdf(name = "MissingWidth")]
         pub missing_width: Option<f32>,
         #[pdf(name = "FontFile")]
-        pub font_file: Option<PdfStream>,
+        pub font_file: Option<PdfStream<PdfDictionary, PdfFontType1Program>>,
         #[pdf(name = "FontFile2")]
         pub font_file2: Option<PdfStream>,
         #[pdf(name = "FontFile3")]
@@ -403,7 +409,7 @@ impl PdfFontType1 {
             Self::Other(v) => Some(&v.font_descriptor),
         }
     }
-    pub fn encoding(&self) -> &PdfObjectDirect {
+    pub fn encoding(&self) -> &Option<PdfSimpleFontEncoding> {
         match self {
             Self::Standard(v) => &v.encoding,
             Self::Other(v) => &v.encoding,
@@ -435,14 +441,19 @@ impl PdfParse for PdfFontType1 {
     }
     fn parse(object: PdfObject) -> Result<Self, PdfParseError> {
         let object = object.into();
-        let PdfObjectDirect::Dictionary(object) = object else {
-            return Arc::<PdfFontType1Other>::parse(object.into()).map(Self::Other);
-        };
-        if let Ok(_) = PdfStandardFontName::parse(object.get_or_null(b"BaseFont".as_slice())) {
-            Arc::<PdfFontType1Standard>::parse(object.into()).map(Self::Standard)
+        let font = if let PdfObjectDirect::Dictionary(object) = object {
+            if let Ok(_) = PdfStandardFontName::parse(object.get_or_null(b"BaseFont".as_slice())) {
+                Self::Standard(PdfParse::parse(object.into())?)
+            } else {
+                Self::Other(PdfParse::parse(object.into())?)
+            }
         } else {
-            Arc::<PdfFontType1Other>::parse(object.into()).map(Self::Other)
+            Self::Other(PdfParse::parse(object.into())?)
+        };
+        if let Some(font_file) = font.font_descriptor().and_then(|v| v.font_file.as_ref()) {
+            font_file.decoded_data().as_ref()?;
         }
+        Ok(font)
     }
 }
 
@@ -456,7 +467,7 @@ pub struct PdfFontType1Common {
     pub last_char: Option<u32>,
     pub widths: Option<Arc<[f32]>>,
     pub font_descriptor: Option<PdfFontDescriptor>,
-    pub encoding: PdfObjectDirect,
+    pub encoding: Option<PdfSimpleFontEncoding>,
     pub to_unicode: Option<PdfFontToUnicode>,
     pub rest: PdfDictionary,
 }
@@ -515,8 +526,7 @@ pdf_parse! {
         #[pdf(name = "FontDescriptor")]
         pub font_descriptor: Option<PdfFontDescriptor>,
         #[pdf(name = "Encoding")]
-        // TODO
-        pub encoding: PdfObjectDirect,
+        pub encoding: Option<PdfSimpleFontEncoding>,
         #[pdf(name = "ToUnicode")]
         pub to_unicode: Option<PdfFontToUnicode>,
         #[pdf(flatten)]
@@ -609,8 +619,7 @@ pdf_parse! {
         #[pdf(name = "FontDescriptor")]
         pub font_descriptor: PdfFontDescriptor,
         #[pdf(name = "Encoding")]
-        // TODO
-        pub encoding: PdfObjectDirect,
+        pub encoding: Option<PdfSimpleFontEncoding>,
         #[pdf(name = "ToUnicode")]
         pub to_unicode: Option<PdfFontToUnicode>,
         #[pdf(flatten)]
@@ -681,3 +690,235 @@ impl PdfFontType1Other {
         }
     }
 }
+
+pdf_parse! {
+    #[pdf(name)]
+    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
+    pub enum PdfSimpleFontEncodingPredefined {
+        #[pdf(name = "MacRomanEncoding")]
+        MacRomanEncoding,
+        #[pdf(name = "MacExpertEncoding")]
+        MacExpertEncoding,
+        #[pdf(name = "WinAnsiEncoding")]
+        WinAnsiEncoding,
+    }
+}
+
+impl PdfSimpleFontEncodingPredefined {
+    pub const fn table(self) -> PdfSimpleFontEncodingTable {
+        match self {
+            Self::MacRomanEncoding => PdfSimpleFontEncodingTable::MAC_ROMAN,
+            Self::MacExpertEncoding => PdfSimpleFontEncodingTable::MAC_EXPERT,
+            Self::WinAnsiEncoding => PdfSimpleFontEncodingTable::WIN_ANSI,
+        }
+    }
+}
+
+pdf_parse! {
+    #[pdf(name)]
+    #[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug, Default)]
+    pub enum PdfSimpleFontEncodingDictionaryType {
+        #[pdf(name = "Encoding")]
+        #[default]
+        Encoding,
+    }
+}
+
+pdf_parse! {
+    #[pdf]
+    #[derive(Clone, Debug)]
+    pub struct PdfSimpleFontEncodingDictionary {
+        #[pdf(name = "Type")]
+        pub ty: Option<PdfSimpleFontEncodingDictionaryType>,
+        #[pdf(name = "BaseEncoding")]
+        pub base_encoding: Option<PdfSimpleFontEncodingPredefined>,
+        #[pdf(name = "Differences")]
+        pub differences: Option<PdfSimpleFontEncodingDifferences>,
+        #[pdf(flatten)]
+        pub rest: PdfDictionary,
+    }
+}
+
+impl PdfSimpleFontEncodingDictionary {
+    pub fn table(
+        &self,
+        default_table: impl FnOnce() -> PdfSimpleFontEncodingTable,
+    ) -> PdfSimpleFontEncodingTable {
+        let Self {
+            ty: _,
+            base_encoding,
+            differences,
+            rest: _,
+        } = self;
+        let mut retval = base_encoding
+            .map(|v| v.table())
+            .unwrap_or_else(default_table);
+        if let Some(differences) = differences {
+            retval = differences.table(retval);
+        }
+        retval
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct PdfSimpleFontEncodingDifferences {
+    pos: PdfInputPositionNoCompare,
+    map: Arc<BTreeMap<u8, PdfName>>,
+}
+
+impl PdfSimpleFontEncodingDifferences {
+    pub fn new(pos: impl Into<PdfInputPositionNoCompare>, map: Arc<BTreeMap<u8, PdfName>>) -> Self {
+        Self {
+            pos: pos.into(),
+            map,
+        }
+    }
+    pub fn pos(&self) -> PdfInputPosition {
+        self.pos.0
+    }
+    pub fn map(&self) -> &Arc<BTreeMap<u8, PdfName>> {
+        &self.map
+    }
+    pub fn table(&self, base_table: PdfSimpleFontEncodingTable) -> PdfSimpleFontEncodingTable {
+        let mut retval = base_table;
+        let table: &mut [_; 0x100] = ArcOrRef::make_mut(&mut retval.table);
+        for (&byte, name) in self.map.iter() {
+            table[usize::from(byte)] = PdfSimpleFontEncodingTableEntry {
+                name: Some(name.clone()),
+                presumed_unicode: None,
+            };
+        }
+        retval
+    }
+}
+
+impl GetPdfInputPosition for PdfSimpleFontEncodingDifferences {
+    fn get_pdf_input_position(&self) -> PdfInputPosition {
+        self.pos.0
+    }
+}
+
+impl IsPdfNull for PdfSimpleFontEncodingDifferences {
+    fn is_pdf_null(&self) -> bool {
+        false
+    }
+}
+
+impl PdfParse for PdfSimpleFontEncodingDifferences {
+    fn type_name() -> Cow<'static, str> {
+        Cow::Borrowed("PdfSimpleFontEncodingDifferences")
+    }
+    fn parse(object: PdfObject) -> Result<Self, PdfParseError> {
+        let array = PdfArray::parse(object)?;
+        let pos = array.pos();
+        let mut map = BTreeMap::new();
+        let mut next_byte = None::<u8>;
+        for i in array.iter() {
+            let i = PdfNameOrInteger::parse(i.clone())?;
+            match i {
+                PdfNameOrInteger::Name(name) => {
+                    let pos = name.pos();
+                    let byte = next_byte.ok_or(PdfParseError::IntegerOutOfRange { pos })?;
+                    next_byte = byte.checked_add(1);
+                    map.insert(byte, name);
+                }
+                PdfNameOrInteger::Integer(v) => next_byte = Some(u8::parse(v.into())?),
+            }
+        }
+        Ok(Self {
+            pos: pos.into(),
+            map: Arc::new(map),
+        })
+    }
+}
+
+#[derive(Clone, Default, Debug)]
+pub struct PdfSimpleFontEncodingTableEntry {
+    pub name: Option<PdfName>,
+    pub presumed_unicode: Option<&'static str>,
+}
+
+impl PdfSimpleFontEncodingTableEntry {
+    pub const fn new_static(
+        name: Option<&'static [u8]>,
+        presumed_unicode: Option<&'static str>,
+    ) -> Self {
+        Self {
+            name: match name {
+                Some(name) => Some(PdfName::new_static(name)),
+                None => None,
+            },
+            presumed_unicode,
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub struct PdfSimpleFontEncodingTable {
+    pub table: ArcOrRef<'static, [PdfSimpleFontEncodingTableEntry; 0x100]>,
+}
+
+#[derive(Clone, Debug)]
+pub enum PdfSimpleFontEncoding {
+    Predefined(PdfSimpleFontEncodingPredefined),
+    Dictionary(PdfSimpleFontEncodingDictionary),
+}
+
+impl PdfSimpleFontEncoding {
+    pub fn table(
+        &self,
+        default_table: impl FnOnce() -> PdfSimpleFontEncodingTable,
+    ) -> PdfSimpleFontEncodingTable {
+        match self {
+            PdfSimpleFontEncoding::Predefined(v) => v.table(),
+            PdfSimpleFontEncoding::Dictionary(v) => v.table(default_table),
+        }
+    }
+}
+
+impl IsPdfNull for PdfSimpleFontEncoding {
+    fn is_pdf_null(&self) -> bool {
+        false
+    }
+}
+
+impl PdfParse for PdfSimpleFontEncoding {
+    fn type_name() -> Cow<'static, str> {
+        Cow::Borrowed("PdfSimpleFontEncoding")
+    }
+    fn parse(object: PdfObject) -> Result<Self, PdfParseError> {
+        let object = PdfObjectDirect::from(object);
+        match object {
+            PdfObjectDirect::Name(v) => Ok(Self::Predefined(PdfParse::parse(v.into())?)),
+            PdfObjectDirect::Dictionary(v) => Ok(Self::Dictionary(PdfParse::parse(v.into())?)),
+            _ => Err(PdfParseError::InvalidType {
+                pos: object.pos(),
+                ty: object.type_name(),
+                expected_ty: "PdfSimpleFontEncoding",
+            }),
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+#[non_exhaustive]
+pub struct PdfFontType1Program {
+    pub encoding: Option<Arc<[Option<PdfName>]>>,
+    pub font_bbox: Option<PdfRectangle>,
+    pub font_info: Option<PdfFontType1FontInfo>,
+    pub font_matrix: Option<PdfMatrix>,
+    pub font_name: Option<PdfName>,
+}
+
+#[derive(Clone, Debug)]
+pub struct PdfFontType1FontInfo {
+    pub family_name: Option<PdfString>,
+    pub full_name: Option<PdfString>,
+    pub notice: Option<PdfString>,
+    pub weight: Option<PdfString>,
+    pub version: Option<PdfString>,
+    pub italic_angle: Option<f32>,
+    pub is_fixed_pitch: Option<bool>,
+    pub underline_position: Option<f32>,
+    pub underline_thickness: Option<f32>,
+}

src/pdf/object.rs

@@ -482,6 +482,81 @@ impl PdfParse for PdfStringOrNumber {
     }
 }
 
+#[derive(Clone)]
+pub enum PdfNameOrInteger {
+    Name(PdfName),
+    Integer(PdfInteger),
+}
+
+impl fmt::Debug for PdfNameOrInteger {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Name(v) => v.fmt(f),
+            Self::Integer(v) => v.fmt(f),
+        }
+    }
+}
+
+impl PdfNameOrInteger {
+    pub fn pos(self) -> PdfInputPosition {
+        match self {
+            Self::Name(v) => v.pos(),
+            Self::Integer(v) => v.pos(),
+        }
+    }
+}
+
+impl PdfObjectDirect {
+    pub fn name_or_integer(&self) -> Option<PdfNameOrInteger> {
+        match *self {
+            PdfObjectDirect::Name(ref v) => Some(PdfNameOrInteger::Name(v.clone())),
+            PdfObjectDirect::Integer(v) => Some(PdfNameOrInteger::Integer(v)),
+            PdfObjectDirect::Boolean(_)
+            | PdfObjectDirect::Real(_)
+            | PdfObjectDirect::String(_)
+            | PdfObjectDirect::Array(_)
+            | PdfObjectDirect::Dictionary(_)
+            | PdfObjectDirect::Stream(_)
+            | PdfObjectDirect::Null(_) => None,
+        }
+    }
+}
+
+impl PdfObjectNonNull {
+    pub fn name_or_integer(&self) -> Option<PdfNameOrInteger> {
+        match *self {
+            PdfObjectNonNull::Name(ref v) => Some(PdfNameOrInteger::Name(v.clone())),
+            PdfObjectNonNull::Integer(v) => Some(PdfNameOrInteger::Integer(v)),
+            PdfObjectNonNull::Boolean(_)
+            | PdfObjectNonNull::Real(_)
+            | PdfObjectNonNull::String(_)
+            | PdfObjectNonNull::Array(_)
+            | PdfObjectNonNull::Dictionary(_)
+            | PdfObjectNonNull::Stream(_) => None,
+        }
+    }
+}
+
+impl IsPdfNull for PdfNameOrInteger {
+    fn is_pdf_null(&self) -> bool {
+        false
+    }
+}
+
+impl PdfParse for PdfNameOrInteger {
+    fn type_name() -> Cow<'static, str> {
+        Cow::Borrowed("name or integer")
+    }
+    fn parse(object: PdfObject) -> Result<Self, PdfParseError> {
+        let object = PdfObjectDirect::from(object);
+        object.name_or_integer().ok_or(PdfParseError::InvalidType {
+            pos: object.pos(),
+            ty: object.type_name(),
+            expected_ty: "name or integer",
+        })
+    }
+}
+
 macro_rules! make_pdf_object {
     (
         $(

src/pdf/parse.rs

@@ -1302,7 +1302,7 @@ macro_rules! pdf_parse {
                     $crate::__std::result::Result::Err($crate::pdf::parse::PdfParseError::InvalidName {
                         pos: name.pos(),
                         name,
-                        expected_ty: $crate::__std::stringify!($Struct),
+                        expected_ty: $crate::__std::stringify!($Enum),
                     })
                 }
             }

src/pdf/render.rs

@@ -40,10 +40,7 @@ use crate::{
             IsPdfNull, PdfMatrix, PdfName, PdfNumber, PdfObject, PdfObjectDirect,
             PdfStringOrNumber, PdfVec2D,
         },
-        parse::{
-            GetPdfInputPosition, PdfInputPosition, PdfInputPositionNoCompare, PdfParse,
-            PdfParseError,
-        },
+        parse::{PdfInputPosition, PdfInputPositionNoCompare, PdfParse, PdfParseError},
     },
     pdf_parse,
 };
@@ -929,8 +926,21 @@ impl PdfRenderOperator for PdfOperatorShowTextWithGlyphPositioning {
                 PdfStringOrNumber::String(s) => {
                     for glyph in s.bytes().iter() {
                         let positioning = std::mem::replace(&mut positioning, 0.0);
-                        let encoding = font.encoding();
-                        todo!("{encoding:?}");
+                        let Some(encoding) = font.encoding() else {
+                            todo!();
+                        };
+                        let table = encoding.table(|| {
+                            let Some(font_encoding) = font
+                                .font_descriptor()
+                                .and_then(|v| v.font_file.as_ref())
+                                .and_then(|v| v.decoded_data().as_ref().ok())
+                                .and_then(|v| v.encoding.as_ref())
+                            else {
+                                todo!()
+                            };
+                            todo!("{font_encoding:?}");
+                        });
+                        todo!("{table:?}");
                     }
                 }
                 PdfStringOrNumber::Number(number) => positioning = number.as_f32(),

src/util.rs

@@ -104,6 +104,65 @@ impl<T: ?Sized + fmt::Display> fmt::Display for ArcOrRef<'_, T> {
     }
 }
 
+/// a stable alternative to `CloneToUninit` for `Arc`
+pub trait ArcFromRef {
+    /// like `Arc::new(Self::clone(self))` but works for unsized types too
+    fn arc_from_ref(&self) -> Arc<Self>;
+    /// generic version of `Arc::make_mut`
+    fn make_mut(this: &mut Arc<Self>) -> &mut Self;
+}
+
+impl<T: Clone> ArcFromRef for T {
+    fn arc_from_ref(&self) -> Arc<Self> {
+        Arc::new(Self::clone(self))
+    }
+    fn make_mut(this: &mut Arc<Self>) -> &mut Self {
+        Arc::make_mut(this)
+    }
+}
+
+impl<T: Clone> ArcFromRef for [T] {
+    fn arc_from_ref(&self) -> Arc<Self> {
+        Arc::from(self)
+    }
+    fn make_mut(this: &mut Arc<Self>) -> &mut Self {
+        Arc::make_mut(this)
+    }
+}
+
+impl ArcFromRef for str {
+    fn arc_from_ref(&self) -> Arc<Self> {
+        Arc::from(self)
+    }
+    fn make_mut(this: &mut Arc<Self>) -> &mut Self {
+        Arc::make_mut(this)
+    }
+}
+
+impl<'a, T: ?Sized + ArcFromRef> ArcOrRef<'a, T> {
+    pub fn into_arc(this: Self) -> Arc<T> {
+        match this {
+            ArcOrRef::Arc(v) => v,
+            ArcOrRef::Ref(v) => T::arc_from_ref(v),
+        }
+    }
+    pub fn make_arc(this: &mut Self) -> &mut Arc<T> {
+        match this {
+            ArcOrRef::Arc(v) => v,
+            ArcOrRef::Ref(v) => {
+                *this = ArcOrRef::Arc(T::arc_from_ref(v));
+                let ArcOrRef::Arc(v) = this else {
+                    unreachable!();
+                };
+                v
+            }
+        }
+    }
+    pub fn make_mut(this: &mut Self) -> &mut T {
+        T::make_mut(Self::make_arc(this))
+    }
+}
+
 trait DagDebugStateSealed {}
 
 #[expect(private_bounds)]