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/* 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/. */
// A temporary custom font collection that exists solely for the face-to-font mapping to work.
use std::mem;
use std::sync::atomic::AtomicUsize;
use winapi::ctypes::c_void;
use winapi::shared::guiddef::REFIID;
use winapi::shared::minwindef::{BOOL, FALSE, TRUE, ULONG};
use winapi::shared::winerror::{E_INVALIDARG, S_OK};
use winapi::um::dwrite::IDWriteFactory;
use winapi::um::dwrite::IDWriteFontCollectionLoader;
use winapi::um::dwrite::IDWriteFontCollectionLoaderVtbl;
use winapi::um::dwrite::IDWriteFontFile;
use winapi::um::dwrite::IDWriteFontFileEnumerator;
use winapi::um::dwrite::IDWriteFontFileEnumeratorVtbl;
use winapi::um::unknwnbase::{IUnknown, IUnknownVtbl};
use winapi::um::winnt::HRESULT;
use wio::com::ComPtr;
use crate::com_helpers::Com;
use crate::FontFile;
static FONT_COLLECTION_LOADER_VTBL: IDWriteFontCollectionLoaderVtbl =
IDWriteFontCollectionLoaderVtbl {
parent: implement_iunknown!(static IDWriteFontCollectionLoader,
CustomFontCollectionLoaderImpl),
CreateEnumeratorFromKey: CustomFontCollectionLoaderImpl_CreateEnumeratorFromKey,
};
#[repr(C)]
pub struct CustomFontCollectionLoaderImpl {
// NB: This must be the first field.
_refcount: AtomicUsize,
font_files: Vec<ComPtr<IDWriteFontFile>>,
}
impl Com<IDWriteFontCollectionLoader> for CustomFontCollectionLoaderImpl {
type Vtbl = IDWriteFontCollectionLoaderVtbl;
#[inline]
fn vtbl() -> &'static IDWriteFontCollectionLoaderVtbl {
&FONT_COLLECTION_LOADER_VTBL
}
}
impl Com<IUnknown> for CustomFontCollectionLoaderImpl {
type Vtbl = IUnknownVtbl;
#[inline]
fn vtbl() -> &'static IUnknownVtbl {
&FONT_COLLECTION_LOADER_VTBL.parent
}
}
impl CustomFontCollectionLoaderImpl {
pub fn new(font_files: &[FontFile]) -> ComPtr<IDWriteFontCollectionLoader> {
unsafe {
ComPtr::from_raw(
CustomFontCollectionLoaderImpl {
_refcount: AtomicUsize::new(1),
font_files: font_files.iter().map(|file| file.as_com_ptr()).collect(),
}
.into_interface(),
)
}
}
}
#[allow(non_snake_case)]
unsafe extern "system" fn CustomFontCollectionLoaderImpl_CreateEnumeratorFromKey(
this: *mut IDWriteFontCollectionLoader,
_: *mut IDWriteFactory,
_: *const c_void,
_: u32,
out_enumerator: *mut *mut IDWriteFontFileEnumerator,
) -> HRESULT {
let this = CustomFontCollectionLoaderImpl::from_interface(this);
let enumerator = CustomFontFileEnumeratorImpl::new((*this).font_files.clone());
let enumerator = ComPtr::<IDWriteFontFileEnumerator>::from_raw(enumerator.into_interface());
*out_enumerator = enumerator.as_raw();
mem::forget(enumerator);
S_OK
}
#[repr(C)]
struct CustomFontFileEnumeratorImpl {
// NB(pcwalton): This must be the first field.
_refcount: AtomicUsize,
font_files: Vec<ComPtr<IDWriteFontFile>>,
index: isize,
}
impl Com<IDWriteFontFileEnumerator> for CustomFontFileEnumeratorImpl {
type Vtbl = IDWriteFontFileEnumeratorVtbl;
#[inline]
fn vtbl() -> &'static IDWriteFontFileEnumeratorVtbl {
&FONT_FILE_ENUMERATOR_VTBL
}
}
impl Com<IUnknown> for CustomFontFileEnumeratorImpl {
type Vtbl = IUnknownVtbl;
#[inline]
fn vtbl() -> &'static IUnknownVtbl {
&FONT_FILE_ENUMERATOR_VTBL.parent
}
}
static FONT_FILE_ENUMERATOR_VTBL: IDWriteFontFileEnumeratorVtbl = IDWriteFontFileEnumeratorVtbl {
parent: implement_iunknown!(static IDWriteFontFileEnumerator, CustomFontFileEnumeratorImpl),
GetCurrentFontFile: CustomFontFileEnumeratorImpl_GetCurrentFontFile,
MoveNext: CustomFontFileEnumeratorImpl_MoveNext,
};
impl CustomFontFileEnumeratorImpl {
pub fn new(font_files: Vec<ComPtr<IDWriteFontFile>>) -> CustomFontFileEnumeratorImpl {
CustomFontFileEnumeratorImpl {
_refcount: AtomicUsize::new(1),
font_files,
index: -1,
}
}
}
#[allow(non_snake_case)]
unsafe extern "system" fn CustomFontFileEnumeratorImpl_GetCurrentFontFile(
this: *mut IDWriteFontFileEnumerator,
out_font_file: *mut *mut IDWriteFontFile,
) -> HRESULT {
let this = CustomFontFileEnumeratorImpl::from_interface(this);
if (*this).index < 0 || (*this).index >= (*this).font_files.len() as isize {
return E_INVALIDARG;
}
let new_font_file = (*this).font_files[(*this).index as usize].clone();
*out_font_file = new_font_file.as_raw();
mem::forget(new_font_file);
S_OK
}
#[allow(non_snake_case)]
unsafe extern "system" fn CustomFontFileEnumeratorImpl_MoveNext(
this: *mut IDWriteFontFileEnumerator,
has_current_file: *mut BOOL,
) -> HRESULT {
let this = CustomFontFileEnumeratorImpl::from_interface(this);
let font_file_count = (*this).font_files.len() as isize;
if (*this).index < font_file_count {
(*this).index += 1
}
*has_current_file = if (*this).index >= 0 && (*this).index < font_file_count {
TRUE
} else {
FALSE
};
S_OK
}
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