3 files changed, 46 insertions, 0 deletions
diff --git a/platform/java/mupdf_native.c b/platform/java/mupdf_native.c
index 8af0b8a4..8d811afe 100644
--- a/platform/java/mupdf_native.c
+++ b/platform/java/mupdf_native.c
@@ -3816,6 +3816,34 @@ FUN(Pixmap_getYResolution)(JNIEnv *env, jobject self)
 	return pixmap ? pixmap->yres : 0;
 }
 
+JNIEXPORT void JNICALL
+FUN(Pixmap_invert)(JNIEnv *env, jobject self)
+{
+	fz_context *ctx = get_context(env);
+	fz_pixmap *pixmap = from_Pixmap(env, self);
+
+	if (!ctx || !pixmap) return;
+
+	fz_try(ctx)
+		fz_invert_pixmap(ctx, pixmap);
+	fz_catch(ctx)
+		jni_rethrow(env, ctx);
+}
+
+JNIEXPORT void JNICALL
+FUN(Pixmap_gamma)(JNIEnv *env, jobject self, jfloat gamma)
+{
+	fz_context *ctx = get_context(env);
+	fz_pixmap *pixmap = from_Pixmap(env, self);
+
+	if (!ctx || !pixmap) return;
+
+	fz_try(ctx)
+		fz_gamma_pixmap(ctx, pixmap, gamma);
+	fz_catch(ctx)
+		jni_rethrow(env, ctx);
+}
+
 /* Path Interface */
 
 JNIEXPORT void JNICALL
diff --git a/platform/java/mupdf_native.h b/platform/java/mupdf_native.h
index 36807a0a..22fdc04a 100644
--- a/platform/java/mupdf_native.h
+++ b/platform/java/mupdf_native.h
@@ -2865,6 +2865,22 @@ JNIEXPORT jint JNICALL Java_com_artifex_mupdf_fitz_Pixmap_getXResolution
 JNIEXPORT jint JNICALL Java_com_artifex_mupdf_fitz_Pixmap_getYResolution
   (JNIEnv *, jobject);
 
+/*
+ * Class:     com_artifex_mupdf_fitz_Pixmap
+ * Method:    invert
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_com_artifex_mupdf_fitz_Pixmap_invert
+  (JNIEnv *, jobject);
+
+/*
+ * Class:     com_artifex_mupdf_fitz_Pixmap
+ * Method:    gamma
+ * Signature: (F)V
+ */
+JNIEXPORT void JNICALL Java_com_artifex_mupdf_fitz_Pixmap_gamma
+  (JNIEnv *, jobject, jfloat);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/platform/java/src/com/artifex/mupdf/fitz/Pixmap.java b/platform/java/src/com/artifex/mupdf/fitz/Pixmap.java
index 1616b90b..5c3552e0 100644
--- a/platform/java/src/com/artifex/mupdf/fitz/Pixmap.java
+++ b/platform/java/src/com/artifex/mupdf/fitz/Pixmap.java
@@ -66,6 +66,8 @@ public class Pixmap
 	public native int[] getPixels(); /* only valid for RGBA or BGRA pixmaps */
 	public native int getXResolution();
 	public native int getYResolution();
+	public native void invert();
+	public native void gamma(float gamma);
 
 	public Rect getBounds() {
 		int x = getX();