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graphics/fonts/bgifont.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 GRAPHICS_FONTS_BGIFONT_H
+#define GRAPHICS_FONTS_BGIFONT_H
+
+#include "common/file.h"
+#include "common/array.h"
+#include "graphics/font.h"
+#include "graphics/surface.h"
+
+namespace Graphics {
+
+const int OPCODE_END = 0;
+const int OPCODE_DOSCAN = 1;
+const int OPCODE_MOVE = 2;
+const int OPCODE_DRAW = 3;
+
+class BgiFont : public Font {
+public:
+	BgiFont();
+	~BgiFont();
+
+	bool loadChr(const Common::Path &fileName);
+	bool loadChr(Common::SeekableReadStream &stream);
+
+	void close();
+
+	int getFontHeight() const { return _totalHeight; }
+	int getCharWidth(uint32 chr) const;
+	int getMaxCharWidth() const { return _maxWidth; }
+	void drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const;
+
+private:
+	struct DrawingInstruction {
+		int opCode;
+		int8 xCoord;
+		int8 yCoord;
+	};
+
+	struct GlyphEntry {
+		GlyphEntry() {
+			charWidth = 0;
+			offset = 0;
+		}
+		~GlyphEntry() {}
+
+		uint16 charWidth;
+		uint32 offset;
+		Common::Array<DrawingInstruction *> insts;
+	} *_glyphs;
+
+	struct CachedFont {
+		int widths[256];
+		int offsets[256];
+		Graphics::Surface *surface;
+		~CachedFont() {
+			delete surface;
+		}
+	};
+
+	uint16 _charCount;
+	byte _firstChar;
+	// uint16 _pixHeight;
+	uint16 _maxWidth = 10;
+	uint32 _totalWidth = 0;
+	int16 _totalHeight = 0;
+	int8 _originToAscender = 0;
+	int8 _originToDescender = 0;
+	Common::Array<CachedFont *> _fontCache;
+
+	uint16 characterToIndex(uint32 character) const;
+	byte fixSign(byte original);
+	CachedFont *drawCachedFont(int size);
+};
+
+} // namespace Graphics
+
+#endif