mirror of
https://github.com/libretro/scummvm.git
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6b44a09a52
svn-id: r46329
159 lines
5.0 KiB
C++
159 lines
5.0 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#ifndef GRAPHICS_FONT_H
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#define GRAPHICS_FONT_H
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#include "common/str.h"
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#include "graphics/surface.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Graphics {
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/** Text alignment modes */
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enum TextAlign {
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kTextAlignInvalid,
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kTextAlignLeft, ///< Text should be aligned to the left
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kTextAlignCenter, ///< Text should be centered
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kTextAlignRight ///< Text should be aligned to the right
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};
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/**
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* Instances of this class represent a distinct font, with a built-in renderer.
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* @todo Maybe move the high-level methods (drawString etc.) to a separate
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* FontRenderer class? That way, we could have different variants... ?
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*/
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class Font {
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public:
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Font() {}
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virtual ~Font() {}
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virtual int getFontHeight() const = 0;
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virtual int getMaxCharWidth() const = 0;
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virtual int getCharWidth(byte chr) const = 0;
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virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const = 0;
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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;
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/**
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* Compute and return the width the string str has when rendered using this font.
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*/
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int getStringWidth(const Common::String &str) const;
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/**
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* Take a text (which may contain newlines characters) and word wrap it so thata
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* no text line is wider than maxWidth pixels. If necessary, additional line breaks
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* are generated, preferably between words (i.e. were whitespaces are).
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* The resulting lines are appended to the string list lines.
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* It returns the maximal width of any of the new lines (i.e. a value which is less
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* or equal to maxWidth).
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*
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* @param str the string to word wrap
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* @param maxWidth the maximum width a line may have
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* @param lines the string list to which the text lines from str are appended
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* @return the maximal width of any of the lines added to lines
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*/
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int wordWrapText(const Common::String &str, int maxWidth, Common::StringList &lines) const;
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};
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class ScummFont : public Font {
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public:
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virtual int getFontHeight() const { return 8; }
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virtual int getMaxCharWidth() const { return 8; }
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virtual int getCharWidth(byte chr) const;
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virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const;
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};
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typedef uint16 bitmap_t; /* bitmap image unit size*/
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struct BBX {
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int8 w;
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int8 h;
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int8 x;
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int8 y;
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};
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/* builtin C-based proportional/fixed font structure */
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/* based on The Microwindows Project http://microwindows.org */
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struct FontDesc {
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const char * name; /* font name*/
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int maxwidth; /* max width in pixels*/
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int height; /* height in pixels*/
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int fbbw, fbbh, fbbx, fbby; /* max bounding box */
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int ascent; /* ascent (baseline) height*/
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int firstchar; /* first character in bitmap*/
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int size; /* font size in glyphs*/
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const bitmap_t* bits; /* 16-bit right-padded bitmap data*/
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const unsigned long* offset; /* offsets into bitmap data*/
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const unsigned char* width; /* character widths or NULL if fixed*/
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const BBX* bbx; /* character bounding box or NULL if fixed */
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int defaultchar; /* default char (not glyph index)*/
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long bits_size; /* # words of bitmap_t bits*/
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};
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struct NewFontData;
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class NewFont : public Font {
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protected:
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FontDesc desc;
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NewFontData *font;
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public:
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NewFont(const FontDesc &d, NewFontData *font_ = 0) : desc(d), font(font_) {}
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~NewFont();
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virtual int getFontHeight() const { return desc.height; }
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virtual int getMaxCharWidth() const { return desc.maxwidth; }
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virtual int getCharWidth(byte chr) const;
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virtual void drawChar(Surface *dst, byte chr, int x, int y, uint32 color) const;
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static NewFont *loadFont(Common::SeekableReadStream &stream);
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static bool cacheFontData(const NewFont &font, const Common::String &filename);
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static NewFont *loadFromCache(Common::SeekableReadStream &stream);
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};
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#define DEFINE_FONT(n) \
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const NewFont *n = 0; \
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void create_##n() { \
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n = new NewFont(desc); \
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}
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#define FORWARD_DECLARE_FONT(n) \
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extern const NewFont *n; \
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extern void create_##n();
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#define INIT_FONT(n) \
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create_##n();
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} // End of namespace Graphics
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#endif
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