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00012 #ifndef GFX_LAYOUT_H
00013 #define GFX_LAYOUT_H
00014
00015 #include "fontcache.h"
00016 #include "gfx_func.h"
00017 #include "core/smallmap_type.hpp"
00018
00019 #include <map>
00020 #include <string>
00021
00022 #ifdef WITH_ICU
00023 #include "layout/ParagraphLayout.h"
00024 #define ICU_FONTINSTANCE : public LEFontInstance
00025 #else
00026 #define ICU_FONTINSTANCE
00027 #endif
00028
00033 struct FontState {
00034 FontSize fontsize;
00035 TextColour cur_colour;
00036 TextColour prev_colour;
00037
00038 FontState() : fontsize(FS_END), cur_colour(TC_INVALID), prev_colour(TC_INVALID) {}
00039 FontState(TextColour colour, FontSize fontsize) : fontsize(fontsize), cur_colour(colour), prev_colour(colour) {}
00040
00045 inline void SetColour(TextColour c)
00046 {
00047 assert(c >= TC_BLUE && c <= TC_BLACK);
00048 this->prev_colour = this->cur_colour;
00049 this->cur_colour = c;
00050 }
00051
00053 inline void SetPreviousColour()
00054 {
00055 Swap(this->cur_colour, this->prev_colour);
00056 }
00057
00062 inline void SetFontSize(FontSize f)
00063 {
00064 this->fontsize = f;
00065 }
00066 };
00067
00071 class Font ICU_FONTINSTANCE {
00072 public:
00073 FontCache *fc;
00074 TextColour colour;
00075
00076 Font(FontSize size, TextColour colour);
00077
00078 #ifdef WITH_ICU
00079
00080
00081 le_int32 getUnitsPerEM() const;
00082 le_int32 getAscent() const;
00083 le_int32 getDescent() const;
00084 le_int32 getLeading() const;
00085 float getXPixelsPerEm() const;
00086 float getYPixelsPerEm() const;
00087 float getScaleFactorX() const;
00088 float getScaleFactorY() const;
00089 const void *getFontTable(LETag tableTag) const;
00090 const void *getFontTable(LETag tableTag, size_t &length) const;
00091 LEGlyphID mapCharToGlyph(LEUnicode32 ch) const;
00092 void getGlyphAdvance(LEGlyphID glyph, LEPoint &advance) const;
00093 le_bool getGlyphPoint(LEGlyphID glyph, le_int32 pointNumber, LEPoint &point) const;
00094 #endif
00095 };
00096
00098 typedef SmallMap<int, Font *> FontMap;
00099
00103 class ParagraphLayouter {
00104 public:
00105 virtual ~ParagraphLayouter() {}
00106
00108 class VisualRun {
00109 public:
00110 virtual ~VisualRun() {}
00111 virtual const Font *GetFont() const = 0;
00112 virtual int GetGlyphCount() const = 0;
00113 virtual const GlyphID *GetGlyphs() const = 0;
00114 virtual const float *GetPositions() const = 0;
00115 virtual int GetLeading() const = 0;
00116 virtual const int *GetGlyphToCharMap() const = 0;
00117 };
00118
00120 class Line {
00121 public:
00122 virtual ~Line() {}
00123 virtual int GetLeading() const = 0;
00124 virtual int GetWidth() const = 0;
00125 virtual int CountRuns() const = 0;
00126 virtual const VisualRun *GetVisualRun(int run) const = 0;
00127 virtual int GetInternalCharLength(WChar c) const = 0;
00128 };
00129
00130 virtual void Reflow() = 0;
00131 virtual const Line *NextLine(int max_width) = 0;
00132 };
00133
00139 class Layouter : public AutoDeleteSmallVector<const ParagraphLayouter::Line *, 4> {
00140 const char *string;
00141
00143 struct LineCacheKey {
00144 FontState state_before;
00145 std::string str;
00146
00148 bool operator<(const LineCacheKey &other) const
00149 {
00150 if (this->state_before.fontsize != other.state_before.fontsize) return this->state_before.fontsize < other.state_before.fontsize;
00151 if (this->state_before.cur_colour != other.state_before.cur_colour) return this->state_before.cur_colour < other.state_before.cur_colour;
00152 if (this->state_before.prev_colour != other.state_before.prev_colour) return this->state_before.prev_colour < other.state_before.prev_colour;
00153 return this->str < other.str;
00154 }
00155 };
00156 public:
00158 struct LineCacheItem {
00159
00160 void *buffer;
00161 FontMap runs;
00162
00163 FontState state_after;
00164 ParagraphLayouter *layout;
00165
00166 LineCacheItem() : buffer(NULL), layout(NULL) {}
00167 ~LineCacheItem() { delete layout; free(buffer); }
00168 };
00169 private:
00170 typedef std::map<LineCacheKey, LineCacheItem> LineCache;
00171 static LineCache *linecache;
00172
00173 static LineCacheItem &GetCachedParagraphLayout(const char *str, size_t len, const FontState &state);
00174
00175 typedef SmallMap<TextColour, Font *> FontColourMap;
00176 static FontColourMap fonts[FS_END];
00177 public:
00178 static Font *GetFont(FontSize size, TextColour colour);
00179
00180 Layouter(const char *str, int maxw = INT32_MAX, TextColour colour = TC_FROMSTRING, FontSize fontsize = FS_NORMAL);
00181 Dimension GetBounds();
00182 Point GetCharPosition(const char *ch) const;
00183 const char *GetCharAtPosition(int x) const;
00184
00185 static void ResetFontCache(FontSize size);
00186 static void ResetLineCache();
00187 static void ReduceLineCache();
00188 };
00189
00190 #endif