dwrote 0.8.0

/* 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/. */

#![allow(non_upper_case_globals)]

#[cfg_attr(feature = "serde_serialization", macro_use)]
#[cfg(feature = "serde_serialization")]
extern crate serde_derive;
#[cfg(feature = "serde_serialization")]
extern crate serde;

#[macro_use]
extern crate lazy_static;
#[macro_use(DEFINE_GUID)]
extern crate winapi;
extern crate libc;

include!("types.rs");

use winapi::Interface;
use winapi::um::dwrite::DWRITE_FACTORY_TYPE_SHARED;
use winapi::um::dwrite::IDWriteFactory;
use winapi::um::dwrite::IDWriteRenderingParams;
pub use winapi::um::winnt::HRESULT;
use winapi::um::winnt::LPCSTR;
use winapi::shared::guiddef::REFIID;
use winapi::um::unknwnbase::IUnknown;
use winapi::um::dwrite::DWRITE_FACTORY_TYPE;
use std::ffi::CString;

use comptr::ComPtr;
use winapi::shared::winerror::S_OK;

mod comptr;
mod helpers;
use helpers::ToWide;
use std::os::raw::c_void;

#[cfg(test)]
mod test;

// We still use the DWrite structs for things like metrics; re-export them
// here
pub use winapi::um::dwrite::DWRITE_FONT_METRICS as FontMetrics;
pub use winapi::um::dwrite::DWRITE_GLYPH_OFFSET as GlyphOffset;
pub use winapi::um::dwrite::{DWRITE_MATRIX, DWRITE_GLYPH_RUN};
pub use winapi::um::dwrite::{DWRITE_RENDERING_MODE_DEFAULT,
                 DWRITE_RENDERING_MODE_ALIASED,
                 DWRITE_RENDERING_MODE_GDI_CLASSIC,
                 DWRITE_RENDERING_MODE_GDI_NATURAL,
                 DWRITE_RENDERING_MODE_NATURAL,
                 DWRITE_RENDERING_MODE_NATURAL_SYMMETRIC,
                 DWRITE_RENDERING_MODE_OUTLINE,
                 DWRITE_RENDERING_MODE_CLEARTYPE_GDI_CLASSIC,
                 DWRITE_RENDERING_MODE_CLEARTYPE_GDI_NATURAL,
                 DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL,
                 DWRITE_RENDERING_MODE_CLEARTYPE_NATURAL_SYMMETRIC};
pub use winapi::um::dcommon::{DWRITE_MEASURING_MODE_NATURAL,
                 DWRITE_MEASURING_MODE_GDI_CLASSIC,
                 DWRITE_MEASURING_MODE_GDI_NATURAL};
pub use winapi::um::dwrite::{DWRITE_FONT_SIMULATIONS_NONE,
                 DWRITE_FONT_SIMULATIONS_BOLD,
                 DWRITE_FONT_SIMULATIONS_OBLIQUE};
pub use winapi::um::dwrite::{DWRITE_TEXTURE_ALIASED_1x1, DWRITE_TEXTURE_CLEARTYPE_3x1};
pub use winapi::um::dwrite::{DWRITE_FONT_SIMULATIONS};
pub use winapi::um::dwrite::{DWRITE_RENDERING_MODE};
pub use winapi::um::dwrite::{DWRITE_TEXTURE_TYPE};
pub use winapi::um::dwrite_3::{DWRITE_FONT_AXIS_VALUE};
pub use winapi::um::dcommon::{DWRITE_MEASURING_MODE};
pub use winapi::shared::windef::RECT;
use winapi::um::libloaderapi::{GetProcAddress, LoadLibraryW};

#[macro_use] mod com_helpers;

mod bitmap_render_target; pub use bitmap_render_target::BitmapRenderTarget;
mod font; pub use font::{Font, InformationalStringId};
mod font_collection; pub use font_collection::FontCollection;
mod font_face; pub use font_face::{FontFace, FontFaceType};
mod font_family; pub use font_family::FontFamily;
mod font_file; pub use font_file::FontFile;
mod gdi_interop; pub use gdi_interop::GdiInterop;
mod outline_builder; pub use outline_builder::OutlineBuilder;
mod rendering_params; pub use rendering_params::RenderingParams;
mod glyph_run_analysis; pub use glyph_run_analysis::GlyphRunAnalysis;

// This is an internal implementation of FontFileLoader, for our utility
// functions.  We don't wrap the DWriteFontFileLoader interface and
// related things.
mod font_file_loader_impl;

// This is an implementation of `FontCollectionLoader` for client code.
mod font_collection_impl; pub use font_collection_impl::CustomFontCollectionLoaderImpl;

// This is an internal implementation of `GeometrySink` so that we can
// expose `IDWriteGeometrySink` in an idiomatic way.
mod geometry_sink_impl;

unsafe impl Sync for ComPtr<IDWriteFactory> { }
unsafe impl Sync for ComPtr<IDWriteRenderingParams> {}

lazy_static! {
    static ref DWRITE_FACTORY_RAW_PTR: usize = {
        unsafe {
            type DWriteCreateFactoryType = extern "system" fn(DWRITE_FACTORY_TYPE, REFIID, *mut *mut IUnknown) -> HRESULT;

            let dwrite_dll = LoadLibraryW("dwrite.dll".to_wide_null().as_ptr());
            assert!(!dwrite_dll.is_null());
            let create_factory_name = CString::new("DWriteCreateFactory").unwrap();
            let dwrite_create_factory_ptr =
                GetProcAddress(dwrite_dll, create_factory_name.as_ptr() as LPCSTR);
            assert!(!dwrite_create_factory_ptr.is_null());

            let dwrite_create_factory =
                mem::transmute::<*const c_void, DWriteCreateFactoryType>(dwrite_create_factory_ptr as *const _);

            let mut factory: ComPtr<IDWriteFactory> = ComPtr::new();
            let hr = dwrite_create_factory(
                DWRITE_FACTORY_TYPE_SHARED,
                &IDWriteFactory::uuidof(),
                factory.getter_addrefs());
            assert!(hr == S_OK);
            factory.forget() as usize
        }
    };

  static ref DEFAULT_DWRITE_RENDERING_PARAMS_RAW_PTR: usize = {
    unsafe {
      let mut default_rendering_params: ComPtr<IDWriteRenderingParams> = ComPtr::new();
      let hr = (*DWriteFactory()).CreateRenderingParams(default_rendering_params.getter_addrefs());
      assert!(hr == S_OK);

      default_rendering_params.forget() as usize
    }
  };

} // end lazy static

// FIXME vlad would be nice to return, say, FactoryPtr<IDWriteFactory>
// that has a DerefMut impl, so that we can write
// DWriteFactory().SomeOperation() as opposed to
// (*DWriteFactory()).SomeOperation()
#[allow(non_snake_case)]
fn DWriteFactory() -> *mut IDWriteFactory {
    (*DWRITE_FACTORY_RAW_PTR) as *mut IDWriteFactory
}

#[allow(non_snake_case)]
fn DefaultDWriteRenderParams() -> *mut IDWriteRenderingParams {
  (*DEFAULT_DWRITE_RENDERING_PARAMS_RAW_PTR) as *mut IDWriteRenderingParams
}