feat: add IMGUI_USE_WCHAR32 support, cross-compile natives, publish to mvn.mrlokop.dev

- Enable IMGUI_USE_WCHAR32 in imconfig.h (ImWchar = uint32_t)
- Extend ImFontGlyphRangesBuilder, ImFontConfig, ImFontAtlas for 32-bit codepoints
- Cross-compile natives for macOS universal, Linux x86_64 (glibc), Windows x86_64
- Publish as org.nnstd.imgui:...:1.90.0-wchar32+mrlokop2 to mvn.mrlokop.dev
- Add BUILDING.md with full rebuild and publish instructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

BUILDING.md

@@ -0,0 +1,230 @@
+# Building imgui-java WCHAR32 Fork
+
+This fork adds `IMGUI_USE_WCHAR32=1` support so that ImGui can handle Unicode codepoints above U+FFFF (emoji, CJK extensions, etc.). Published as `org.nnstd.imgui:imgui-java-*:1.90.0-wchar32+mrlokopN`.
+
+## Repository
+
+- **Maven**: `https://mvn.mrlokop.dev/releases`
+- **Git**: `https://git.mrlokop.dev/shlepa/imgui-java`
+
+## Coordinates
+
+```xml
+<repository>
+  <id>mrlokop</id>
+  <url>https://mvn.mrlokop.dev/releases</url>
+</repository>
+
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-binding</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-lwjgl3</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+<!-- Pick one natives artifact for your platform: -->
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-natives-macos</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-natives-linux</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-natives-windows</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+<!-- Or use the fat jar (includes all natives + LWJGL3): -->
+<dependency>
+  <groupId>org.nnstd.imgui</groupId>
+  <artifactId>imgui-java-app</artifactId>
+  <version>1.90.0-wchar32+mrlokop2</version>
+</dependency>
+```
+
+For Gradle (Kotlin DSL):
+
+```kotlin
+repositories {
+    maven("https://mvn.mrlokop.dev/releases")
+}
+
+dependencies {
+    implementation("org.nnstd.imgui:imgui-java-binding:1.90.0-wchar32+mrlokop2")
+    implementation("org.nnstd.imgui:imgui-java-lwjgl3:1.90.0-wchar32+mrlokop2")
+    runtimeOnly("org.nnstd.imgui:imgui-java-natives-linux:1.90.0-wchar32+mrlokop2")
+}
+```
+
+## Version History
+
+| Version | Linux toolchain | Notes |
+|---------|-----------------|-------|
+| `+mrlokop1` | musl (`x86_64-unknown-linux-musl`) | No glibc dependency; static stdlib |
+| `+mrlokop2` | glibc (`x86_64-unknown-linux-gnu`) | Standard Linux distros; links libc.so.6 |
+
+## Prerequisites (macOS build host)
+
+All cross-compilation is done from a macOS machine.
+
+```bash
+# Java 17 (build toolchain)
+sdk install java 17.0.18.1-sem    # via SDKMAN
+
+# Native build tools
+brew install ant
+brew install mingw-w64            # Windows cross-compiler
+
+# Linux glibc cross-compiler (for +mrlokop2 / recommended)
+brew tap messense/macos-cross-toolchains
+brew install x86_64-unknown-linux-gnu
+
+# Linux musl cross-compiler (for +mrlokop1 / no-glibc builds)
+brew install x86_64-unknown-linux-musl
+```
+
+## Build Steps
+
+### 1. Clone and initialise submodules
+
+```bash
+git clone https://git.mrlokop.dev/shlepa/imgui-java
+cd imgui-java
+git submodule update --init --recursive
+```
+
+### 2. Build vendored FreeType for each platform
+
+FreeType must be cross-compiled before the JNI natives.
+
+```bash
+buildSrc/scripts/vendor_freetype.sh macos
+buildSrc/scripts/vendor_freetype.sh linux
+buildSrc/scripts/vendor_freetype.sh windows
+```
+
+Each invocation drops a static `libfreetype.a` into `build/vendor/freetype/lib/`. The macOS build uses `lipo` to create a universal (arm64 + x86_64) library automatically.
+
+### 3. Build JNI natives
+
+```bash
+export JAVA_HOME=/path/to/java17
+
+# macOS universal (arm64 + x86_64)
+JAVA_HOME=$JAVA_HOME buildSrc/scripts/build.sh macos
+
+# Linux x86_64 (glibc)
+JAVA_HOME=$JAVA_HOME buildSrc/scripts/build.sh linux
+
+# Windows x86_64 (mingw)
+JAVA_HOME=$JAVA_HOME buildSrc/scripts/build.sh windows
+```
+
+Compiled natives land in:
+- `bin/macos64/libimgui-java64.dylib`
+- `bin/macosarm64/libimgui-java64.dylib`
+- `bin/linux64/libimgui-java64.so`
+- `bin/windows64/imgui-java64.dll`
+
+### 4. Bump the version (when releasing a new patch)
+
+Edit `build.gradle` (root), increment the `+mrlokopN` suffix:
+
+```groovy
+version = '1.90.0-wchar32+mrlokop3'   // was +mrlokop2
+```
+
+### 5. Publish to Maven
+
+Publish each platform's natives separately because the artifact classifier differs. Run all four publish commands:
+
+```bash
+JH=/path/to/java17
+GW="JAVA_HOME=$JH ./gradlew"
+
+# Binding + LWJGL3 (platform-independent JARs)
+$GW imgui-binding:publishImguiPublicationToMrLokopRepository \
+    imgui-lwjgl3:publishImguiPublicationToMrLokopRepository
+
+# Native artifacts (one per platform)
+$GW imgui-binding-natives:publishImguiPublicationToMrLokopRepository -PdeployType=macos
+$GW imgui-binding-natives:publishImguiPublicationToMrLokopRepository -PdeployType=linux
+$GW imgui-binding-natives:publishImguiPublicationToMrLokopRepository -PdeployType=windows
+
+# Fat app JAR (all natives bundled)
+$GW imgui-app:publishImguiPublicationToMrLokopRepository
+```
+
+## Switching Linux Toolchain (musl vs glibc)
+
+**glibc** (default, `+mrlokop2`) — standard Linux distributions:
+
+In `buildSrc/src/main/groovy/tool/generator/GenerateLibs.groovy`:
+```groovy
+linux64.compilerPrefix = 'x86_64-unknown-linux-gnu-'
+```
+
+In `buildSrc/scripts/vendor_freetype.sh`:
+```bash
+linux) build_freetype "-fPIC" "--host=x86_64-unknown-linux-gnu" "lib/libfreetype.a" "x86_64-unknown-linux-gnu-gcc" ;;
+```
+
+**musl** (`+mrlokop1`) — no glibc dependency, portable:
+
+In `GenerateLibs.groovy`:
+```groovy
+linux64.compilerPrefix = 'x86_64-unknown-linux-musl-'
+linux64.linkerFlags = linux64.linkerFlags.replace('-Wl,-wrap,memcpy', '')
+// After AntScriptGenerator.generate(), neutralise memcpy_wrap.c:
+def memcpyWrap = new File("$jniDir/memcpy_wrap.c")
+if (memcpyWrap.exists()) {
+    memcpyWrap.text = '/* disabled for musl */'
+}
+```
+
+In `vendor_freetype.sh`:
+```bash
+linux) build_freetype "-fPIC" "--host=x86_64-unknown-linux-musl" "lib/libfreetype.a" "x86_64-unknown-linux-musl-gcc" ;;
+```
+
+## Key Changes vs Upstream
+
+| File | Change |
+|------|--------|
+| `imgui-binding/src/main/native/imconfig.h` | Uncommented `#define IMGUI_USE_WCHAR32` |
+| `ImFontGlyphRangesBuilder.java` | `UNICODE_CODEPOINT_MAX=0x10FFFF`; `addChar(int)`; 32-bit LE encoding in `addRanges`/`buildRanges` |
+| `ImFontConfig.java` | Added `setGlyphRanges(int[])` overload |
+| `ImFontAtlas.java` | `RETURN_GLYPH_2_SHORT` macro uses `sizeof(ImWchar)/sizeof(jshort)` multiplier |
+| `build.gradle` | Version hardcoded to `1.90.0-wchar32+mrlokopN` |
+| `publish.gradle` | `groupId=org.nnstd.imgui`, repo=`https://mvn.mrlokop.dev/releases` |
+| `GenerateLibs.groovy` | Linux uses `x86_64-unknown-linux-gnu-` prefix |
+| `vendor_freetype.sh` | `--host=` flags for all platforms; macOS universal via `lipo` |
+
+## 32-bit Glyph Range Encoding
+
+With `IMGUI_USE_WCHAR32`, `ImWchar` is `uint32_t` (4 bytes). The Java binding stores glyph ranges as `short[]` where each 32-bit codepoint is packed as two little-endian `jshort`s:
+
+```
+ranges = [lo_lo, lo_hi, hi_lo, hi_hi, ..., 0, 0]
+         ^--- pair 1 ---^  ^--- pair 2+ ---^  terminator
+```
+
+Use `ImFontGlyphRangesBuilder.buildRanges()` or `ImFontConfig.setGlyphRanges(int[])` to handle this automatically:
+
+```java
+// int[] variant (simplest)
+fontConfig.setGlyphRanges(new int[]{ 0x1F000, 0x1F9FF, 0 });
+
+// Builder variant
+ImFontGlyphRangesBuilder builder = new ImFontGlyphRangesBuilder();
+builder.addText("Hello 🌍");
+short[] ranges = builder.buildRanges();
+fontConfig.setGlyphRanges(ranges);
+```

build.gradle

@@ -8,7 +8,7 @@ ext {
 
 allprojects {
     group = 'imgui-java'
-    version = 'git describe --tags --always'.execute().text.trim().substring(1)
+    version = '1.90.0-wchar32+mrlokop2'
 
     repositories {
         mavenCentral()

buildSrc/scripts/vendor_freetype.sh

@@ -35,16 +35,23 @@ echo "FreeType unzipped to $LIBDIR"
 COMMON_FLAGS="--enable-static --disable-shared --without-zlib --without-bzip2 --without-png --without-harfbuzz --without-brotli"
 
 # Function to configure and build FreeType
+# Args: cflags prefix output_dir [cc]
 build_freetype() {
     cflags=$1
     prefix=$2
     output_dir=$3
+    cc=${4:-}
 
     echo "Cleaning previous builds..."
     make clean
 
-    echo "Configuring FreeType with CFLAGS='$cflags' and PREFIX='$prefix'..."
+    if [ -n "$cc" ]; then
-    ./configure CFLAGS="$cflags" $COMMON_FLAGS $prefix
+        echo "Configuring FreeType with CC='$cc' CFLAGS='$cflags' and PREFIX='$prefix'..."
+        ./configure CC="$cc" CFLAGS="$cflags" $COMMON_FLAGS $prefix
+    else
+        echo "Configuring FreeType with CFLAGS='$cflags' and PREFIX='$prefix'..."
+        ./configure CFLAGS="$cflags" $COMMON_FLAGS $prefix
+    fi
     if [ $? -ne 0 ]; then
         echo "Failed to configure FreeType"
         exit 1
@@ -82,13 +89,13 @@ case "$VTYPE" in
         build_freetype "" "--host=x86_64-w64-mingw32 --prefix=/usr/x86_64-w64-mingw32" "lib/libfreetype.a"
         ;;
     linux)
-        build_freetype "-fPIC" "" "lib/libfreetype.a"
+        build_freetype "-fPIC" "--host=x86_64-unknown-linux-gnu" "lib/libfreetype.a" "x86_64-unknown-linux-gnu-gcc"
         ;;
     macos)
         MACOS_VERSION=10.15
 
-        build_freetype "-arch x86_64 -mmacosx-version-min=$MACOS_VERSION" "" "tmp/libfreetype-x86_64.a"
+        build_freetype "-arch x86_64 -mmacosx-version-min=$MACOS_VERSION" "--host=x86_64-apple-darwin" "tmp/libfreetype-x86_64.a"
-        build_freetype "-arch arm64 -mmacosx-version-min=$MACOS_VERSION" "" "tmp/libfreetype-arm64.a"
+        build_freetype "-arch arm64 -mmacosx-version-min=$MACOS_VERSION" "--host=aarch64-apple-darwin" "tmp/libfreetype-arm64.a"
 
         echo "Creating universal library using lipo..."
         lipo -create -output lib/libfreetype.a tmp/libfreetype-x86_64.a tmp/libfreetype-arm64.a

buildSrc/src/main/groovy/tool/generator/GenerateLibs.groovy

@@ -108,12 +108,14 @@ class GenerateLibs extends DefaultTask {
 
         if (forWindows) {
             def win64 = BuildTarget.newDefaultTarget(Os.Windows, Architecture.Bitness._64)
+            win64.compilerPrefix = 'x86_64-w64-mingw32-'
             addFreeTypeIfEnabled(win64)
             buildTargets += win64
         }
 
         if (forLinux) {
             def linux64 = BuildTarget.newDefaultTarget(Os.Linux, Architecture.Bitness._64)
+            linux64.compilerPrefix = 'x86_64-unknown-linux-gnu-'
             addFreeTypeIfEnabled(linux64)
             buildTargets += linux64
         }

gradle.properties

@@ -1,3 +1,4 @@
 org.gradle.parallel=true
 org.gradle.caching=true
 org.gradle.jvmargs=-Xms2G -Xmx4G
+org.gradle.java.installations.paths=/Users/user/.sdkman/candidates/java/8.0.472-amzn,/Users/user/.sdkman/candidates/java/17.0.18.1-sem,/Users/user/.sdkman/candidates/java/25-amzn

imgui-binding/src/generated/java/imgui/ImFontAtlas.java

@@ -594,9 +594,11 @@ public final class ImFontAtlas extends ImGuiStructDestroyable {
     /*JNI
         #define RETURN_GLYPH_2_SHORT(glyphs) \
             const ImWchar* ranges = glyphs; \
-            int size = 0; \
+            int pairCount = 0; \
             for (; ranges[0]; ranges += 2) \
-                size += 2; \
+                pairCount++; \
+            int shortsPerImWchar = (int)(sizeof(ImWchar) / sizeof(jshort)); \
+            int size = pairCount * 2 * shortsPerImWchar + shortsPerImWchar; \
             jshortArray jShorts = env->NewShortArray(size); \
             env->SetShortArrayRegion(jShorts, 0, size, (jshort*)glyphs); \
             return jShorts;

imgui-binding/src/generated/java/imgui/ImFontConfig.java

@@ -347,6 +347,33 @@ public final class ImFontConfig extends ImGuiStructDestroyable {
         nSetGlyphRanges(glyphRanges);
     }
 
+    /**
+     * Convenience overload: encodes int[] codepoint pairs into WCHAR32 short[] layout and calls setGlyphRanges.
+     * Expects int[] pairs [ lo, hi, lo, hi, ..., 0 ] (zero-terminated).
+     * THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
+     */
+    public void setGlyphRanges(final int[] codepoints) {
+        // count pairs
+        int pairCount = 0;
+        for (int i = 0; i + 1 < codepoints.length; i += 2) {
+            if (codepoints[i] == 0) break;
+            pairCount++;
+        }
+        // each pair = 4 shorts (2 per endpoint), plus 2 terminator shorts
+        final short[] encoded = new short[pairCount * 4 + 2];
+        int out = 0;
+        for (int i = 0; i < pairCount; i++) {
+            final int lo = codepoints[i * 2];
+            final int hi = codepoints[i * 2 + 1];
+            encoded[out++] = (short) (lo & 0xFFFF);
+            encoded[out++] = (short) ((lo >> 16) & 0xFFFF);
+            encoded[out++] = (short) (hi & 0xFFFF);
+            encoded[out++] = (short) ((hi >> 16) & 0xFFFF);
+        }
+        // terminator already zero from array initialisation
+        setGlyphRanges(encoded);
+    }
+
     private native void nSetGlyphRanges(short[] glyphRanges); /*
         THIS->GlyphRanges = glyphRanges != NULL ? (ImWchar*)&glyphRanges[0] : NULL;
     */

imgui-binding/src/generated/java/imgui/ImFontGlyphRangesBuilder.java

@@ -10,12 +10,14 @@ import java.util.List;
  * You can use the ImFontGlyphRangesBuilder helper to create glyph ranges based on text input. For example: for a game where your script is known,
  * if you can feed your entire script to it and only build the characters the game needs.
  * <p>
- * Direct reimplementation of native ImFontGlyphRangesBuilder in java
+ * Direct reimplementation of native ImFontGlyphRangesBuilder in java.
+ * Built with IMGUI_USE_WCHAR32=1: supports full Unicode range U+0000..U+10FFFF.
+ * buildRanges() emits each range endpoint as two little-endian shorts (32-bit ImWchar layout).
  */
 public final class ImFontGlyphRangesBuilder {
-    private static final int UNICODE_CODEPOINT_MAX = 0xFFFF;
+    private static final int UNICODE_CODEPOINT_MAX = 0x10FFFF;
 
-    // have to use type long because values are unsigned integers
+    // have to use type long because values are unsigned integers; sized the same way as native (divide by 8)
     private final long[] usedChars = new long[(UNICODE_CODEPOINT_MAX + 1) / 8];
 
     public ImFontGlyphRangesBuilder() {
@@ -23,56 +25,98 @@ public final class ImFontGlyphRangesBuilder {
     }
 
     /**
-     * Adds single character to resulting ranges
+     * Adds single character to resulting ranges (char overload for source compatibility)
      */
     public void addChar(final char c) {
         setBit(c);
     }
 
     /**
-     * Adds all characters from the given string to resulting ranges
+     * Adds a Unicode codepoint (including SMP, U+10000..U+10FFFF) to resulting ranges
      */
-    public void addText(final String text) {
+    public void addChar(final int codepoint) {
-        for (int i = 0; i < text.length(); i++) {
+        if (codepoint >= 0 && codepoint <= UNICODE_CODEPOINT_MAX) {
-            addChar(text.charAt(i));
+            setBit(codepoint);
         }
     }
 
     /**
-     * Copies all given ranges to resulting ranges
+     * Adds all codepoints from the given string to resulting ranges.
+     * Handles supplementary characters (emoji, etc.) via codePointAt iteration.
+     */
+    public void addText(final String text) {
+        int i = 0;
+        while (i < text.length()) {
+            final int cp = text.codePointAt(i);
+            addChar(cp);
+            i += Character.charCount(cp);
+        }
+    }
+
+    /**
+     * Copies all given ranges to resulting ranges.
+     * Expects the WCHAR32 short[] layout: each 32-bit codepoint encoded as two little-endian shorts,
+     * pairs of codepoints form a [lo, hi] range, terminated by two zero shorts.
+     * Format: [ lo_lo16, lo_hi16, hi_lo16, hi_hi16, ..., 0, 0 ]
      */
     public void addRanges(final short[] ranges) {
-        for (int i = 0; i < ranges.length; i += 2) {
+        for (int i = 0; i + 3 < ranges.length; i += 4) {
+            final int lo = (ranges[i] & 0xFFFF) | ((ranges[i + 1] & 0xFFFF) << 16);
+            final int hi = (ranges[i + 2] & 0xFFFF) | ((ranges[i + 3] & 0xFFFF) << 16);
+            if (lo == 0) {
+                break;
+            }
+            for (int k = lo; k <= hi && k <= UNICODE_CODEPOINT_MAX; k++) {
+                setBit(k);
+            }
+        }
+    }
+
+    /**
+     * Copies all given ranges to resulting ranges.
+     * Expects int[] pairs: [ lo, hi, lo, hi, ..., 0 ] (zero-terminated).
+     */
+    public void addRanges(final int[] ranges) {
+        for (int i = 0; i + 1 < ranges.length; i += 2) {
             if (ranges[i] == 0) {
                 break;
             }
-
+            for (int k = ranges[i]; k <= ranges[i + 1] && k <= UNICODE_CODEPOINT_MAX; k++) {
-            for (int k = ranges[i]; k <= ranges[i + 1]; k++) {
+                setBit(k);
-                addChar((char) k);
             }
         }
     }
 
     /**
-     * Builds the final result (ordered ranges with all the unique characters submitted)
+     * Builds the final result (ordered ranges with all the unique characters submitted).
-     * Result of this function can be directly passed to ImFontAtlas
+     * Result is in WCHAR32 short[] layout: each range endpoint is two little-endian shorts,
+     * terminated by two zero shorts.
+     * Format: [ lo_lo16, lo_hi16, hi_lo16, hi_hi16, ..., 0, 0 ]
      */
     public short[] buildRanges() {
         final List<Short> out = new ArrayList<>();
         for (int n = 0; n <= UNICODE_CODEPOINT_MAX; n++) {
             if (getBit(n)) {
-                out.add((short) n);
+                final int lo = n;
                 while (n < UNICODE_CODEPOINT_MAX && getBit(n + 1)) {
                     n++;
                 }
-                out.add((short) n);
+                final int hi = n;
+                // emit lo as two LE shorts
+                out.add((short) (lo & 0xFFFF));
+                out.add((short) ((lo >> 16) & 0xFFFF));
+                // emit hi as two LE shorts
+                out.add((short) (hi & 0xFFFF));
+                out.add((short) ((hi >> 16) & 0xFFFF));
             }
         }
 
-        final short[] result = new short[out.size() + 1];
+        // terminator: two zero shorts (= one 32-bit zero ImWchar)
+        final short[] result = new short[out.size() + 2];
         for (int i = 0; i < out.size(); i++) {
             result[i] = out.get(i);
         }
+        result[result.length - 2] = 0;
         result[result.length - 1] = 0;
         return result;
     }

imgui-binding/src/main/java/imgui/ImFontAtlas.java

@@ -256,9 +256,11 @@ public final class ImFontAtlas extends ImGuiStructDestroyable {
     /*JNI
         #define RETURN_GLYPH_2_SHORT(glyphs) \
             const ImWchar* ranges = glyphs; \
-            int size = 0; \
+            int pairCount = 0; \
             for (; ranges[0]; ranges += 2) \
-                size += 2; \
+                pairCount++; \
+            int shortsPerImWchar = (int)(sizeof(ImWchar) / sizeof(jshort)); \
+            int size = pairCount * 2 * shortsPerImWchar + shortsPerImWchar; \
             jshortArray jShorts = env->NewShortArray(size); \
             env->SetShortArrayRegion(jShorts, 0, size, (jshort*)glyphs); \
             return jShorts;

imgui-binding/src/main/java/imgui/ImFontConfig.java

@@ -124,6 +124,33 @@ public final class ImFontConfig extends ImGuiStructDestroyable {
         nSetGlyphRanges(glyphRanges);
     }
 
+    /**
+     * Convenience overload: encodes int[] codepoint pairs into WCHAR32 short[] layout and calls setGlyphRanges.
+     * Expects int[] pairs [ lo, hi, lo, hi, ..., 0 ] (zero-terminated).
+     * THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
+     */
+    public void setGlyphRanges(final int[] codepoints) {
+        // count pairs
+        int pairCount = 0;
+        for (int i = 0; i + 1 < codepoints.length; i += 2) {
+            if (codepoints[i] == 0) break;
+            pairCount++;
+        }
+        // each pair = 4 shorts (2 per endpoint), plus 2 terminator shorts
+        final short[] encoded = new short[pairCount * 4 + 2];
+        int out = 0;
+        for (int i = 0; i < pairCount; i++) {
+            final int lo = codepoints[i * 2];
+            final int hi = codepoints[i * 2 + 1];
+            encoded[out++] = (short) (lo & 0xFFFF);
+            encoded[out++] = (short) ((lo >> 16) & 0xFFFF);
+            encoded[out++] = (short) (hi & 0xFFFF);
+            encoded[out++] = (short) ((hi >> 16) & 0xFFFF);
+        }
+        // terminator already zero from array initialisation
+        setGlyphRanges(encoded);
+    }
+
     private native void nSetGlyphRanges(short[] glyphRanges); /*
         THIS->GlyphRanges = glyphRanges != NULL ? (ImWchar*)&glyphRanges[0] : NULL;
     */

imgui-binding/src/main/java/imgui/ImFontGlyphRangesBuilder.java

@@ -10,12 +10,14 @@ import java.util.List;
  * You can use the ImFontGlyphRangesBuilder helper to create glyph ranges based on text input. For example: for a game where your script is known,
  * if you can feed your entire script to it and only build the characters the game needs.
  * <p>
- * Direct reimplementation of native ImFontGlyphRangesBuilder in java
+ * Direct reimplementation of native ImFontGlyphRangesBuilder in java.
+ * Built with IMGUI_USE_WCHAR32=1: supports full Unicode range U+0000..U+10FFFF.
+ * buildRanges() emits each range endpoint as two little-endian shorts (32-bit ImWchar layout).
  */
 public final class ImFontGlyphRangesBuilder {
-    private static final int UNICODE_CODEPOINT_MAX = 0xFFFF;
+    private static final int UNICODE_CODEPOINT_MAX = 0x10FFFF;
 
-    // have to use type long because values are unsigned integers
+    // have to use type long because values are unsigned integers; sized the same way as native (divide by 8)
     private final long[] usedChars = new long[(UNICODE_CODEPOINT_MAX + 1) / 8];
 
     public ImFontGlyphRangesBuilder() {
@@ -23,56 +25,98 @@ public final class ImFontGlyphRangesBuilder {
     }
 
     /**
-     * Adds single character to resulting ranges
+     * Adds single character to resulting ranges (char overload for source compatibility)
      */
     public void addChar(final char c) {
         setBit(c);
     }
 
     /**
-     * Adds all characters from the given string to resulting ranges
+     * Adds a Unicode codepoint (including SMP, U+10000..U+10FFFF) to resulting ranges
      */
-    public void addText(final String text) {
+    public void addChar(final int codepoint) {
-        for (int i = 0; i < text.length(); i++) {
+        if (codepoint >= 0 && codepoint <= UNICODE_CODEPOINT_MAX) {
-            addChar(text.charAt(i));
+            setBit(codepoint);
         }
     }
 
     /**
-     * Copies all given ranges to resulting ranges
+     * Adds all codepoints from the given string to resulting ranges.
+     * Handles supplementary characters (emoji, etc.) via codePointAt iteration.
+     */
+    public void addText(final String text) {
+        int i = 0;
+        while (i < text.length()) {
+            final int cp = text.codePointAt(i);
+            addChar(cp);
+            i += Character.charCount(cp);
+        }
+    }
+
+    /**
+     * Copies all given ranges to resulting ranges.
+     * Expects the WCHAR32 short[] layout: each 32-bit codepoint encoded as two little-endian shorts,
+     * pairs of codepoints form a [lo, hi] range, terminated by two zero shorts.
+     * Format: [ lo_lo16, lo_hi16, hi_lo16, hi_hi16, ..., 0, 0 ]
      */
     public void addRanges(final short[] ranges) {
-        for (int i = 0; i < ranges.length; i += 2) {
+        for (int i = 0; i + 3 < ranges.length; i += 4) {
+            final int lo = (ranges[i] & 0xFFFF) | ((ranges[i + 1] & 0xFFFF) << 16);
+            final int hi = (ranges[i + 2] & 0xFFFF) | ((ranges[i + 3] & 0xFFFF) << 16);
+            if (lo == 0) {
+                break;
+            }
+            for (int k = lo; k <= hi && k <= UNICODE_CODEPOINT_MAX; k++) {
+                setBit(k);
+            }
+        }
+    }
+
+    /**
+     * Copies all given ranges to resulting ranges.
+     * Expects int[] pairs: [ lo, hi, lo, hi, ..., 0 ] (zero-terminated).
+     */
+    public void addRanges(final int[] ranges) {
+        for (int i = 0; i + 1 < ranges.length; i += 2) {
             if (ranges[i] == 0) {
                 break;
             }
-
+            for (int k = ranges[i]; k <= ranges[i + 1] && k <= UNICODE_CODEPOINT_MAX; k++) {
-            for (int k = ranges[i]; k <= ranges[i + 1]; k++) {
+                setBit(k);
-                addChar((char) k);
             }
         }
     }
 
     /**
-     * Builds the final result (ordered ranges with all the unique characters submitted)
+     * Builds the final result (ordered ranges with all the unique characters submitted).
-     * Result of this function can be directly passed to ImFontAtlas
+     * Result is in WCHAR32 short[] layout: each range endpoint is two little-endian shorts,
+     * terminated by two zero shorts.
+     * Format: [ lo_lo16, lo_hi16, hi_lo16, hi_hi16, ..., 0, 0 ]
      */
     public short[] buildRanges() {
         final List<Short> out = new ArrayList<>();
         for (int n = 0; n <= UNICODE_CODEPOINT_MAX; n++) {
             if (getBit(n)) {
-                out.add((short) n);
+                final int lo = n;
                 while (n < UNICODE_CODEPOINT_MAX && getBit(n + 1)) {
                     n++;
                 }
-                out.add((short) n);
+                final int hi = n;
+                // emit lo as two LE shorts
+                out.add((short) (lo & 0xFFFF));
+                out.add((short) ((lo >> 16) & 0xFFFF));
+                // emit hi as two LE shorts
+                out.add((short) (hi & 0xFFFF));
+                out.add((short) ((hi >> 16) & 0xFFFF));
             }
         }
 
-        final short[] result = new short[out.size() + 1];
+        // terminator: two zero shorts (= one 32-bit zero ImWchar)
+        final short[] result = new short[out.size() + 2];
         for (int i = 0; i < out.size(); i++) {
             result[i] = out.get(i);
         }
+        result[result.length - 2] = 0;
         result[result.length - 1] = 0;
         return result;
     }

imgui-binding/src/main/native/imconfig.h

@@ -59,7 +59,7 @@
 //#define IMGUI_USE_BGRA_PACKED_COLOR
 
 //---- Use 32-bit for ImWchar (default is 16-bit) to support unicode planes 1-16. (e.g. point beyond 0xFFFF like emoticons, dingbats, symbols, shapes, ancient languages, etc...)
-//#define IMGUI_USE_WCHAR32
+#define IMGUI_USE_WCHAR32
 
 //---- Avoid multiple STB libraries implementations, or redefine path/filenames to prioritize another version
 // By default the embedded implementations are declared static and not available outside of Dear ImGui sources files.

publish.gradle

@@ -12,19 +12,17 @@ ext.configurePublishing = { packageName, packageDesc, packageVersion ->
     publishing {
         repositories {
             maven {
-                name = 'MavenCentral'
+                name = 'MrLokop'
-                def releasesRepoUrl = 'https://ossrh-staging-api.central.sonatype.com/service/local/staging/deploy/maven2'
+                url = 'https://mvn.mrlokop.dev/releases'
-                def snapshotsRepoUrl = 'https://central.sonatype.com/repository/maven-snapshots'
-                url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
                 credentials {
-                    username = System.getenv('NEXUS_UPD_ID')?.trim() ?: ''
+                    username = 'AutoRobot'
-                    password = System.getenv('NEXUS_UPD_PASS')?.trim() ?: ''
+                    password = '8Mr3OAv4WcRNHZS3lAVDx32sWt71YS7GsBvN7TZhCGMmDeSz'
                 }
             }
         }
         publications {
             imgui(MavenPublication) {
-                groupId = 'io.github.spair'
+                groupId = 'org.nnstd.imgui'
                 artifactId = packageName
                 version = packageVersion
 

settings.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    id("org.gradle.toolchains.foojay-resolver-convention") version("0.10.0")
+    id("org.gradle.toolchains.foojay-resolver-convention") version("0.9.0")
 }
 
 rootProject.name = "imgui-java"