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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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef GRAPHICS_FONT_H
#define GRAPHICS_FONT_H
#include "common/str.h"
namespace Common {
class SeekableReadStream;
template<class T> class Array;
}
namespace Graphics {
struct Surface;
/** Text alignment modes */
enum TextAlign {
kTextAlignInvalid,
kTextAlignLeft, ///< Text should be aligned to the left
kTextAlignCenter, ///< Text should be centered
kTextAlignRight ///< Text should be aligned to the right
};
/**
* Instances of this class represent a distinct font, with a built-in renderer.
* @todo Maybe move the high-level methods (drawString etc.) to a separate
* FontRenderer class? That way, we could have different variants... ?
*/
class Font {
public:
Font() {}
virtual ~Font() {}
/**
* Query the height of the font.
*
* @return font height.
*/
virtual int getFontHeight() const = 0;
/**
* Query the maximum width of the font.
*
* @return maximum font width.
*/
virtual int getMaxCharWidth() const = 0;
/**
* Query the width of a specific character.
*
* @param chr The character to query the width of.
* @return The character's width.
*/
virtual int getCharWidth(byte chr) const = 0;
/**
* Draw a character at a specific point on a surface.
*
* Note that the point describes the top left edge point of the
* character's bounding box.
*
* The Font implemenation should take care of not drawing outside of the
* specified surface.
*
* @param dst The surface to drawn on.
* @param chr The character to draw.
* @param x The x coordinate where to draw the character.
* @param y The y coordinate where to draw the character.
* @param color The color of the character.
*/
virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const = 0;
// TODO: Add doxygen comments to this
void drawString(Surface *dst, const Common::String &str, int x, int y, int w, uint32 color, TextAlign align = kTextAlignLeft, int deltax = 0, bool useEllipsis = true) const;
/**
* Compute and return the width the string str has when rendered using this font.
*/
int getStringWidth(const Common::String &str) const;
/**
* Take a text (which may contain newline characters) and word wrap it so that
* no text line is wider than maxWidth pixels. If necessary, additional line breaks
* are generated, preferably between words (i.e. where whitespaces are).
* The resulting lines are appended to the lines string list.
* It returns the maximal width of any of the new lines (i.e. a value which is less
* or equal to maxWidth).
*
* @param str the string to word wrap
* @param maxWidth the maximum width a line may have
* @param lines the string list to which the text lines from str are appended
* @return the maximal width of any of the lines added to lines
*/
int wordWrapText(const Common::String &str, int maxWidth, Common::Array<Common::String> &lines) const;
};
/**
* A SCUMM style font.
*/
class ScummFont : public Font {
public:
virtual int getFontHeight() const { return 8; }
virtual int getMaxCharWidth() const { return 8; }
virtual int getCharWidth(byte chr) const;
virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const;
};
typedef uint16 bitmap_t; /* bitmap image unit size*/
struct BBX {
int8 w;
int8 h;
int8 x;
int8 y;
};
/* builtin C-based proportional/fixed font structure */
/* based on The Microwindows Project http://microwindows.org */
struct FontDesc {
const char * name; /* font name*/
int maxwidth; /* max width in pixels*/
int height; /* height in pixels*/
int fbbw, fbbh, fbbx, fbby; /* max bounding box */
int ascent; /* ascent (baseline) height*/
int firstchar; /* first character in bitmap*/
int size; /* font size in glyphs*/
const bitmap_t* bits; /* 16-bit right-padded bitmap data*/
const unsigned long* offset; /* offsets into bitmap data*/
const unsigned char* width; /* character widths or NULL if fixed*/
const BBX* bbx; /* character bounding box or NULL if fixed */
int defaultchar; /* default char (not glyph index)*/
long bits_size; /* # words of bitmap_t bits*/
};
struct NewFontData;
class NewFont : public Font {
protected:
FontDesc _desc;
NewFontData *_font;
public:
NewFont(const FontDesc &desc, NewFontData *font = 0) : _desc(desc), _font(font) {}
~NewFont();
virtual int getFontHeight() const { return _desc.height; }
virtual int getMaxCharWidth() const { return _desc.maxwidth; }
virtual int getCharWidth(byte chr) const;
virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const;
static NewFont *loadFont(Common::SeekableReadStream &stream);
static bool cacheFontData(const NewFont &font, const Common::String &filename);
static NewFont *loadFromCache(Common::SeekableReadStream &stream);
};
#define DEFINE_FONT(n) \
const NewFont *n = 0; \
void create_##n() { \
n = new NewFont(desc); \
}
#define FORWARD_DECLARE_FONT(n) \
extern const NewFont *n; \
extern void create_##n()
#define INIT_FONT(n) \
create_##n()
} // End of namespace Graphics
#endif
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