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engines/grim/bitmap.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef GRIM_BITMAP_H
+#define GRIM_BITMAP_H
+
+#include "graphics/pixelformat.h"
+
+#include "common/endian.h"
+#include "common/hashmap.h"
+#include "common/hash-str.h"
+
+#include "engines/grim/pool.h"
+
+namespace Graphics {
+struct Surface;
+}
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Grim {
+
+/**
+ * This BitmapData class keeps the actual bitmap data and can be shared
+ * between Bitmap instances, by using getBitmapData.
+ * Bitmap still keeps the data that can change between the instances
+ * i.e. _x, _y and _currImage.
+ * They are automatically deleted if they are not used by any bitmap anymore.
+ */
+class BitmapData {
+public:
+	BitmapData(const Common::String &fname);
+	BitmapData(const Graphics::Surface &buf, int w, int h, const char *fname);
+	BitmapData();
+	~BitmapData();
+
+	void freeData();
+
+	void load();
+
+	/**
+	 * Loads an EMI TILE-bitmap.
+	 *
+	 * @param data      the data for the TILE.
+	 * @param len       the length of the data.
+	 */
+	bool loadTile(Common::SeekableReadStream *data);
+	bool loadGrimBm(Common::SeekableReadStream *data);
+	bool loadTGA(Common::SeekableReadStream *data);
+
+	static BitmapData *getBitmapData(const Common::String &fname);
+	static Common::HashMap<Common::String, BitmapData *> *_bitmaps;
+
+	const Graphics::Surface &getImageData(int num) const;
+
+	/**
+	 * Convert a bitmap to another color-format.
+	 *
+	 * @param format    the format to convert to.
+	 */
+	void convertToColorFormat(const Graphics::PixelFormat &format);
+
+	/**
+	 * Convert a bitmap to another color-format.
+	 *
+	 * @param format    the format to convert to.
+	 */
+	void convertToColorFormat(int num, const Graphics::PixelFormat &format);
+
+	Common::String _fname;
+	int _numImages;
+	int _width, _height, _x, _y;
+	int _format;
+	int _numTex;
+	int _bpp;
+	void *_texIds;
+	bool _hasTransparency;
+	bool _loaded;
+	bool _keepData;
+
+	int _refCount;
+
+	float *_texc;
+
+	struct Vert {
+		uint32 _texid;
+		uint32 _pos;
+		uint32 _verts;
+	};
+	struct Layer {
+		uint32 _offset;
+		uint32 _numImages;
+	};
+	Vert *_verts;
+	Layer *_layers;
+	uint32 _numCoords;
+	uint32 _numVerts;
+	uint32 _numLayers;
+
+//private:
+	Graphics::Surface *_data;
+	void *_userData;
+};
+
+class Bitmap : public PoolObject<Bitmap> {
+public:
+	/**
+	 * Construct a bitmap from the given data.
+	 *
+	 * @oaram filename  the filename of the bitmap
+	 * @param data      the actual data to construct from
+	 * @param len       the length of the data
+	 */
+	Bitmap(const Common::String &filename);
+	Bitmap(const Graphics::Surface &buf, int width, int height, const char *filename);
+	Bitmap();
+
+	static int32 getStaticTag() { return MKTAG('V', 'B', 'U', 'F'); }
+
+	static Bitmap *create(const Common::String &filename);
+
+	const Common::String &getFilename() const { return _data->_fname; }
+
+	void draw();
+	void draw(int x, int y);
+
+	void drawLayer(uint32 layer);
+
+	/**
+	 * Set which image in an animated bitmap to use
+	 *
+	 * @param n     the image to be selected
+	 */
+	void setActiveImage(int n);
+
+	int getNumImages() const;
+	int getNumLayers() const;
+	int getActiveImage() const { return _currImage; }
+	bool getHasTransparency() const { return _data->_hasTransparency; }
+	int getFormat() const { return _data->_format; }
+	int getWidth() const { return _data->_width; }
+	int getHeight() const { return _data->_height; }
+
+	const Graphics::Surface &getData(int num) const { return _data->getImageData(num); }
+	const Graphics::Surface &getData() const { return getData(_currImage); }
+	BitmapData *getBitmapData() const { return _data; }
+	void *getTexIds() const { return _data->_texIds; }
+	int getNumTex() const { return _data->_numTex; }
+	const Graphics::PixelFormat &getPixelFormat(int num) const;
+
+	void saveState(SaveGame *state) const;
+	void restoreState(SaveGame *state);
+
+	virtual ~Bitmap();
+
+//private:
+	void freeData();
+
+	BitmapData *_data;
+	/**
+	 * Specifies a one-based index to the current image in BitmapData.
+	 * _currImage==0 means a null image is chosen.
+	 */
+	int _currImage;
+};
+
+} // end of namespace Grim
+
+#endif