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FastDirectWrite Compilation Guide

FastDirectWrite consists of a lightweight C++17 native dynamic link library (fastdirectwrite.dll) and a Java 25 Foreign Function & Memory (FFM) library.

1. Prerequisites

  • Windows 10 / 11 (64-bit)
  • Microsoft Visual Studio 2022+ (Community or Build Tools) with Desktop development with C++
  • GraalVM JDK 25+ or Oracle JDK 25+ (Java 22+ with Foreign Function & Memory API)
  • Apache Maven 3.9+

2. Compiling the Native Library

FastDirectWrite includes an automated batch script compile.bat that automatically discovers your Visual Studio MSVC environment:

cd FastDirectWrite
.\compile.bat

The build script invokes MSVC cl.exe:

cl.exe /O2 /LD /EHsc /std:c++17 /W3 /DUNICODE /D_UNICODE ^
    native\FastDirectWrite.cpp ^
    /link /DLL /OUT:fastdirectwrite.dll user32.lib gdi32.lib dwrite.lib d2d1.lib ole32.lib

It places the resulting fastdirectwrite.dll into:

  1. ./fastdirectwrite.dll (root)
  2. src/main/resources/native/fastdirectwrite.dll (packaged inside JAR)
  3. target/classes/native/fastdirectwrite.dll (immediate test runtime)

3. Compiling the Java Library

Build the JAR using Maven:

mvn clean package -DskipTests

4. Running the Interactive Demo

Start the hardware-accelerated Windows 11 typography demo:

.\run-demo.bat