diff --git a/include/ace/utils/chunky.h b/include/ace/utils/chunky.h
index f1223494..5809e25f 100644
--- a/include/ace/utils/chunky.h
+++ b/include/ace/utils/chunky.h
@@ -21,7 +21,9 @@
  *
  * @see chunkyFromPlanar()
  */
-void chunkyFromPlanar16(tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut);
+void chunkyFromPlanar16(
+	const tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut
+);
 
 /**
  * @brief Returns color index of selected pixel.
@@ -34,7 +36,7 @@ void chunkyFromPlanar16(tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut);
  *
  * @see chunkyFromPlanar16()
  */
-UBYTE chunkyFromPlanar(tBitMap *pBitMap, UWORD uwX, UWORD uwY);
+UBYTE chunkyFromPlanar(const tBitMap *pBitMap, UWORD uwX, UWORD uwY);
 
 /**
  * @brief Rotates chunky pixels by given angle, on spefied background.
@@ -53,7 +55,7 @@ UBYTE chunkyFromPlanar(tBitMap *pBitMap, UWORD uwX, UWORD uwY);
  * @param wHeight   Ditto, height.
  */
 void chunkyRotate(
-	UBYTE *pSource, UBYTE *pDest,
+	const UBYTE *pSource, UBYTE *pDest,
 	fix16_t fSin, fix16_t fCos,
 	UBYTE ubBgColor, WORD wWidth, WORD wHeight
 );
@@ -72,7 +74,7 @@ void chunkyRotate(
  * @see chunkyFromPlanar16
  * @see chunkyToPlanar
  */
-void chunkyToPlanar16(UBYTE *pIn, UWORD uwX, UWORD uwY, tBitMap *pOut);
+void chunkyToPlanar16(const UBYTE *pIn, UWORD uwX, UWORD uwY, tBitMap *pOut);
 
 /**
  * Puts single chunky pixel on bitmap at given coordinates.
@@ -90,4 +92,36 @@ void chunkyToPlanar16(UBYTE *pIn, UWORD uwX, UWORD uwY, tBitMap *pOut);
  */
 void chunkyToPlanar(UBYTE ubIn, UWORD uwX, UWORD uwY, tBitMap *pOut);
 
+/**
+ * @brief Reads given portion of bitmap to chunky buffer.
+ *
+ * @param pBitmap Source bitmap image.
+ * @param pChunky Desitination chunky buffer.
+ * @param uwSrcOffsX X offset of conversion area, in pixels.
+ * @param uwSrcOffsY Y offset of conversion area, in pixels.
+ * @param uwWidth Width of conversion area, in pixels.
+ * @param uwHeight Height of conversion area, in pixels.
+ *
+ * @see chunkyToBitmap
+ */
+void chunkyFromBitmap(
+	const tBitMap *pBitmap, UBYTE *pChunky,
+	UWORD uwSrcOffsX, UWORD uwSrcOffsY, UWORD uwWidth, UWORD uwHeight
+);
+
+/**
+ * @brief Writes given chunky buffer into specified portion of bitmap
+ *
+ * @param pChunky Source chunky data buffer.
+ * @param pBitmap Destination bitmap.
+ * @param uwDstOffsX X offset of conversion area, in pixels.
+ * @param uwDstOffsY Y offset of conversion area, in pixels.
+ * @param uwWidth Width of conversion area, in pixels.
+ * @param uwHeight Height of conversion area, in pixels.
+ */
+void chunkyToBitmap(
+	const UBYTE *pChunky, tBitMap *pBitmap,
+	UWORD uwDstOffsX, UWORD uwDstOffsY, UWORD uwWidth, UWORD uwHeight
+);
+
 #endif // _ACE_UTILS_CHUNKY_H_
diff --git a/src/ace/utils/chunky.c b/src/ace/utils/chunky.c
index f355d5cd..525b145e 100644
--- a/src/ace/utils/chunky.c
+++ b/src/ace/utils/chunky.c
@@ -8,7 +8,9 @@
 #include <ace/utils/bitmap.h>
 #include <fixmath/fix16.h>
 
-void chunkyFromPlanar16(tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut) {
+void chunkyFromPlanar16(
+	const tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut
+) {
 	UWORD uwChunk, uwMask;
 	UBYTE i, ubPx;
 	memset(pOut, 0, 16*sizeof(*pOut));
@@ -24,13 +26,13 @@ void chunkyFromPlanar16(tBitMap *pBitMap, UWORD uwX, UWORD uwY, UBYTE *pOut) {
 	}
 }
 
-UBYTE chunkyFromPlanar(tBitMap *pBitMap, UWORD uwX, UWORD uwY) {
+UBYTE chunkyFromPlanar(const tBitMap *pBitMap, UWORD uwX, UWORD uwY) {
 	UBYTE pIndicesChunk[16];
 	chunkyFromPlanar16(pBitMap, uwX, uwY, pIndicesChunk);
 	return pIndicesChunk[uwX&0xF];
 }
 
-void chunkyToPlanar16(UBYTE *pIn, UWORD uwX, UWORD uwY, tBitMap *pOut) {
+void chunkyToPlanar16(const UBYTE *pIn, UWORD uwX, UWORD uwY, tBitMap *pOut) {
 	UBYTE ubPlane, ubPixel;
 	UWORD uwPlanarBuffer = 0;
 	UWORD *pPlane;
@@ -57,7 +59,7 @@ void chunkyToPlanar(UBYTE ubIn, UWORD uwX, UWORD uwY, tBitMap *pOut) {
 }
 
 void chunkyRotate(
-	UBYTE *pSource, UBYTE *pDest, fix16_t fSin, fix16_t fCos,
+	const UBYTE *pSource, UBYTE *pDest, fix16_t fSin, fix16_t fCos,
 	UBYTE ubBgColor, WORD wWidth, WORD wHeight
 ) {
 	fix16_t fCx, fCy;
@@ -88,3 +90,30 @@ void chunkyRotate(
 		}
 	}
 }
+
+void chunkyFromBitmap(
+	const tBitMap *pBitmap, UBYTE *pChunky,
+	UWORD uwSrcOffsX, UWORD uwSrcOffsY, UWORD uwWidth, UWORD uwHeight
+) {
+	for(UWORD y = 0; y < uwHeight; ++y) {
+		for(UWORD x = 0; x < uwWidth; x += 16) {
+			chunkyFromPlanar16(
+				pBitmap, uwSrcOffsX + x, uwSrcOffsY + y, &pChunky[y*uwWidth + x]
+			);
+		}
+	}
+}
+
+void chunkyToBitmap(
+	const UBYTE *pChunky, tBitMap *pBitmap,
+	UWORD uwDstOffsX, UWORD uwDstOffsY, UWORD uwWidth, UWORD uwHeight
+) {
+	for(UWORD y = 0; y < uwHeight; ++y) {
+		for(UWORD x = 0; x < uwWidth; x += 16)
+			chunkyToPlanar16(
+				&pChunky[(y*uwWidth) + x],
+				uwDstOffsX + x, uwDstOffsY + y,
+				pBitmap
+			);
+	}
+}