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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 {
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;
/**
* Query the kerning offset between two characters.
*
* @param left The left character. May be 0.
* @param right The right character. May be 0.
* @return The horizontal displacement.
*/
virtual int getKerningOffset(byte left, byte right) const;
/**
* 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;
};
} // End of namespace Graphics
#endif
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