GRAPHICS: Fix ImageDecoder inconsistency with getPalette()

Per LordHoto's suggestion

3 files changed, 14 insertions, 9 deletions

diff --git a/graphics/decoders/image_decoder.h b/graphics/decoders/image_decoder.h
index 830645d361..49e31c6e3a 100644
--- a/graphics/decoders/image_decoder.h
+++ b/graphics/decoders/image_decoder.h
@@ -78,10 +78,15 @@ public:
 	 * The palette's format is the same as PaletteManager's palette
 	 * (interleaved RGB values).
 	 *
-	 * @return the decoded palette, or 0 if no palette is present
+	 * @return the decoded palette, or undefined if no palette is present
 	 */
 	virtual const byte *getPalette() const { return 0; }
 
+	/**
+	 * Query if the decoded image has a palette.
+	 */
+	virtual bool hasPalette() const { return getPaletteColorCount() != 0; }
+
 	/** Return the starting index of the palette. */
 	virtual byte getPaletteStartIndex() const { return 0; }
 	/** Return the number of colors in the palette. */
diff --git a/graphics/decoders/pict.cpp b/graphics/decoders/pict.cpp
index 7eddd3b893..9e619df208 100644
--- a/graphics/decoders/pict.cpp
+++ b/graphics/decoders/pict.cpp
@@ -292,12 +292,12 @@ struct PackBitsRectData {
 	uint16 mode;
 };
 
-void PICTDecoder::unpackBitsRect(Common::SeekableReadStream &stream, bool hasPalette) {
+void PICTDecoder::unpackBitsRect(Common::SeekableReadStream &stream, bool withPalette) {
 	PackBitsRectData packBitsData;
-	packBitsData.pixMap = readPixMap(stream, !hasPalette);
+	packBitsData.pixMap = readPixMap(stream, !withPalette);
 
 	// Read in the palette if there is one present
-	if (hasPalette) {
+	if (withPalette) {
 		// See http://developer.apple.com/legacy/mac/library/documentation/mac/QuickDraw/QuickDraw-267.html
 		stream.readUint32BE(); // seed
 		stream.readUint16BE(); // flags
@@ -469,10 +469,10 @@ void PICTDecoder::outputPixelBuffer(byte *&out, byte value, byte bitsPerPixel) {
 	}
 }
 
-void PICTDecoder::skipBitsRect(Common::SeekableReadStream &stream, bool hasPalette) {
+void PICTDecoder::skipBitsRect(Common::SeekableReadStream &stream, bool withPalette) {
 	// Step through a PackBitsRect/DirectBitsRect function
 
-	if (!hasPalette)
+	if (!withPalette)
 		stream.readUint32BE();
 
 	uint16 rowBytes = stream.readUint16BE();
@@ -492,7 +492,7 @@ void PICTDecoder::skipBitsRect(Common::SeekableReadStream &stream, bool hasPalet
 		stream.readUint16BE(); // pixelSize
 		stream.skip(16);
 
-		if (hasPalette) {
+		if (withPalette) {
 			stream.readUint32BE();
 			stream.readUint16BE();
 			stream.skip((stream.readUint16BE() + 1) * 8);
diff --git a/graphics/decoders/pict.h b/graphics/decoders/pict.h
index 417a7c5134..fa352e653c 100644
--- a/graphics/decoders/pict.h
+++ b/graphics/decoders/pict.h
@@ -87,9 +87,9 @@ private:
 	bool _continueParsing;
 
 	// Utility Functions
-	void unpackBitsRect(Common::SeekableReadStream &stream, bool hasPalette);
+	void unpackBitsRect(Common::SeekableReadStream &stream, bool withPalette);
 	void unpackBitsLine(byte *out, uint32 length, Common::SeekableReadStream *stream, byte bitsPerPixel, byte bytesPerPixel);
-	void skipBitsRect(Common::SeekableReadStream &stream, bool hasPalette);
+	void skipBitsRect(Common::SeekableReadStream &stream, bool withPalette);
 	void decodeCompressedQuickTime(Common::SeekableReadStream &stream);
 	void outputPixelBuffer(byte *&out, byte value, byte bitsPerPixel);