Cine::Palette: Add a black palette constructor and a clear-function for clearing the palette of all data (Releases used memory etc).

svn-id: r39713

2 files changed, 22 insertions, 0 deletions

diff --git a/engines/cine/pal.cpp b/engines/cine/pal.cpp
index ebefee84bc..94c0f59dc0 100644
--- a/engines/cine/pal.cpp
+++ b/engines/cine/pal.cpp
@@ -269,6 +269,17 @@ Cine::Palette::Color Palette::saturatedAddColor(Cine::Palette::Color baseColor,
 	return result;
 }
 
+Palette::Palette(const Graphics::PixelFormat format, const uint numColors) : _format(format), _colors() {
+	_colors.resize(numColors);
+	fillWithBlack();
+}
+
+Palette &Palette::clear() {
+	_format = Graphics::PixelFormat();
+	_colors.clear();
+	return *this;
+}
+
 Palette &Palette::load(const byte *buf, const uint size, const Graphics::PixelFormat format, const uint numColors, const EndianType endian) {
 	assert(format.bytesPerPixel * numColors <= size); // Make sure there's enough input space
 	assert(format.aLoss == 8); // No alpha
diff --git a/engines/cine/pal.h b/engines/cine/pal.h
index 42228c570e..1f55a4f73f 100644
--- a/engines/cine/pal.h
+++ b/engines/cine/pal.h
@@ -80,6 +80,17 @@ private:
 	};
 
 public:
+	/*! \brief Create an initially black palette with the given color format and number of colors.
+	 * \param format Color format
+	 * \param numColors Number of colors
+	 */
+	Palette(const Graphics::PixelFormat format, const uint numColors);
+
+	/*! \brief Clear the palette (Set color count to zero, release memory, overwrite color format with default value).
+	 * \note This is very different from using fillWithBlack-function which fills the palette with black.
+	 */
+	Palette &clear();
+
 	/*! \brief Load palette from buffer with given color format, endianness and number of colors.
 	 * \param buf Input buffer
 	 * \param size Input buffer size in bytes