Update Java bindings for HDR support

interface/java_binding/src/main/cpp/KtxTexture2.cpp

@@ -8,6 +8,17 @@
 #include <iostream>
 #include "libktx-jni.h"
 
+extern "C" JNIEXPORT jint JNICALL Java_org_khronos_ktx_KtxTexture2_getTransferFunction(JNIEnv *env, jobject thiz)
+{
+    ktxTexture2 *texture = get_ktx2_texture(env, thiz);
+    if (texture == NULL) 
+    {
+      ThrowDestroyed(env);
+      return 0;
+    }
+    return ktxTexture2_GetTransferFunction_e(texture);
+}
+
 extern "C" JNIEXPORT jint JNICALL Java_org_khronos_ktx_KtxTexture2_getOETF(JNIEnv *env, jobject thiz)
 {
     ktxTexture2 *texture = get_ktx2_texture(env, thiz);
@@ -41,6 +52,29 @@ extern "C" JNIEXPORT jboolean JNICALL Java_org_khronos_ktx_KtxTexture2_needsTran
     return ktxTexture2_NeedsTranscoding(texture);
 }
 
+extern "C" JNIEXPORT jboolean JNICALL Java_org_khronos_ktx_KtxTexture2_isTranscodable(JNIEnv *env, jobject thiz)
+{
+    ktxTexture2 *texture = get_ktx2_texture(env, thiz);
+    if (texture == NULL) 
+    {
+      ThrowDestroyed(env);
+      return false;
+    }
+    return ktxTexture2_IsTranscodable(texture);
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_org_khronos_ktx_KtxTexture2_isHDR(JNIEnv *env, jobject thiz)
+{
+    ktxTexture2 *texture = get_ktx2_texture(env, thiz);
+    if (texture == NULL) 
+    {
+      ThrowDestroyed(env);
+      return false;
+    }
+    return ktxTexture2_IsHDR(texture);
+}
+
+
 extern "C" JNIEXPORT jint JNICALL Java_org_khronos_ktx_KtxTexture2_getVkFormat(JNIEnv *env, jobject thiz)
 {
     ktxTexture2 *texture = get_ktx2_texture(env, thiz);

interface/java_binding/src/main/cpp/libktx-jni.cpp

@@ -27,7 +27,19 @@ jmethodID Buffer_hasArray_method; // "()Z"
 jmethodID Buffer_array_method; // "()Ljava/lang/Object;"
 
 // The field IDs of the Java classes 
-// The comment indicates their signature/type
+// The comment indicates their signature/type:
+// Z boolean
+// B byte
+// C char
+// S short
+// I int
+// J long
+// F float
+// D double
+// L fully-qualified-class; fully-qualified-class
+// [ type type[]
+// ( arg-types ) ret-type	method type
+
 
 jfieldID KtxTexture_instance_field; // "J"
 
@@ -75,6 +87,13 @@ jfieldID KtxBasisParams_uastcRDOMaxSmoothBlockErrorScale_field; // "F"
 jfieldID KtxBasisParams_uastcRDOMaxSmoothBlockStdDev_field; // "F"
 jfieldID KtxBasisParams_uastcRDODontFavorSimplerModes_field; // "Z"
 jfieldID KtxBasisParams_uastcRDONoMultithreading_field; // "Z"
+jfieldID KtxBasisParams_uastcHDRQuality_field; // "I"
+jfieldID KtxBasisParams_uastcHDRUberMode_field; // "Z"
+jfieldID KtxBasisParams_uastcHDRUltraQuant_field; // "Z"
+jfieldID KtxBasisParams_uastcHDRFavorAstc_field; // "Z"
+jfieldID KtxBasisParams_rec2020_field; // "Z"
+jfieldID KtxBasisParams_uastcHDRLambda_field; // "F"
+jfieldID KtxBasisParams_uastcHDRLevel_field; // "I"
 
 
 /**
@@ -155,7 +174,7 @@ JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *jvm, void *)
     if (!initField(env, cls, KtxBasisParams_verbose_field, "verbose", "Z")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_noSSE_field, "noSSE", "Z")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_threadCount_field, "threadCount", "I")) return JNI_ERR;
-    if (!initField(env, cls, KtxBasisParams_etc1sCompressionLevel_field, "compressionLevel", "I")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_etc1sCompressionLevel_field, "etc1sCompressionLevel", "I")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_qualityLevel_field, "qualityLevel", "I")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_maxEndpoints_field, "maxEndpoints", "I")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_endpointRDOThreshold_field, "endpointRDOThreshold", "F")) return JNI_ERR;
@@ -174,6 +193,13 @@ JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *jvm, void *)
     if (!initField(env, cls, KtxBasisParams_uastcRDOMaxSmoothBlockStdDev_field, "uastcRDOMaxSmoothBlockStdDev", "F")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_uastcRDODontFavorSimplerModes_field, "uastcRDODontFavorSimplerModes", "Z")) return JNI_ERR;
     if (!initField(env, cls, KtxBasisParams_uastcRDONoMultithreading_field, "uastcRDONoMultithreading", "Z")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRQuality_field, "uastcHDRQuality", "I")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRUberMode_field, "uastcHDRUberMode", "Z")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRUltraQuant_field, "uastcHDRUltraQuant", "Z")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRFavorAstc_field, "uastcHDRFavorAstc", "Z")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_rec2020_field, "rec2020", "Z")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRLambda_field, "uastcHDRLambda", "F")) return JNI_ERR;
+    if (!initField(env, cls, KtxBasisParams_uastcHDRLevel_field, "uastcHDRLevel", "I")) return JNI_ERR;
 
      return JNI_VERSION_1_4;
 }
@@ -320,6 +346,14 @@ bool copy_ktx_basis_params(JNIEnv *env, jobject params, ktxBasisParams &out)
     out.uastcRDOMaxSmoothBlockStdDev = env->GetFloatField(params, KtxBasisParams_uastcRDOMaxSmoothBlockStdDev_field);
     out.uastcRDODontFavorSimplerModes = env->GetBooleanField(params, KtxBasisParams_uastcRDODontFavorSimplerModes_field);
     out.uastcRDONoMultithreading = env->GetBooleanField(params, KtxBasisParams_uastcRDONoMultithreading_field);
+    out.uastcHDRQuality = env->GetIntField(params, KtxBasisParams_uastcHDRQuality_field);
+    out.uastcRDONoMultithreading = env->GetBooleanField(params, KtxBasisParams_uastcRDONoMultithreading_field);
+    out.uastcHDRUberMode = env->GetBooleanField(params, KtxBasisParams_uastcHDRUberMode_field);
+    out.uastcHDRUltraQuant = env->GetBooleanField(params, KtxBasisParams_uastcHDRUltraQuant_field);
+    out.uastcHDRFavorAstc = env->GetBooleanField(params, KtxBasisParams_uastcRDONoMultithreading_field);
+    out.rec2020 = env->GetBooleanField(params, KtxBasisParams_rec2020_field);
+    out.uastcHDRLambda = env->GetFloatField(params, KtxBasisParams_uastcHDRLambda_field);
+    out.uastcHDRLevel = env->GetIntField(params, KtxBasisParams_uastcHDRLevel_field);
 
     return true;
 }

interface/java_binding/src/main/java/org/khronos/ktx/KtxAstcParams.java

@@ -6,8 +6,6 @@
 
 package org.khronos.ktx;
 
-import java.util.Arrays;
-
 /**
  * Structure for passing extended parameters to
  * {@link KtxTexture2#compressAstcEx(KtxAstcParams)}.<br>

interface/java_binding/src/main/java/org/khronos/ktx/KtxBasisCodec.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2026, Khronos Group and Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.khronos.ktx;
+
+/**
+ * Options specifying basis codec.<br>
+ * <br>
+ * These constants can be passed to the {@link KtxBasisParams#setCodec(int)}
+ * function.
+ */
+public class KtxBasisCodec {
+    /**
+     * None
+     */
+    public static final int NONE = 0;
+
+    /**
+     * BasisLZ
+     */
+    public static final int ETC1S = 1;
+
+    /**
+     * UASTC
+     */
+    public static final int UASTC_LDR = 2;
+
+    /**
+     * UASTC_HDR_4X4
+     */
+    public static final int UASTC_HDR_4X4 = 3;
+
+    /**
+     * UASTC_HDR_6X6i
+     */
+    public static final int UASTC_HDR_6X6_INTERMEDIATE = 4;
+
+    /**
+     * Returns a string representation of the given basis codec
+     *
+     * @param n The basis codec
+     * @return A string representation of the given basis codec
+     */
+    public static String stringFor(int n) {
+	switch (n) {
+	case NONE:
+	    return "NONE";
+	case ETC1S:
+	    return "ETC1S";
+	case UASTC_LDR:
+	    return "UASTC_LDR";
+	case UASTC_HDR_4X4:
+	    return "UASTC_HDR_4X4";
+	case UASTC_HDR_6X6_INTERMEDIATE:
+	    return "UASTC_HDR_6X6_INTERMEDIATE";
+	}
+	return "[Unknown KtxBasisCodec]";
+    }
+
+    /**
+     * Private constructor to prevent instantiation
+     */
+    private KtxBasisCodec() {
+	// Prevent instantiation
+    }
+
+}