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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
00100 #ifndef WITH_ICU
00101
00121 class ParagraphLayout {
00122 public:
00124 class VisualRun {
00125 Font *font;
00126 GlyphID *glyphs;
00127 float *positions;
00128 int glyph_count;
00129
00130 public:
00131 VisualRun(Font *font, const WChar *chars, int glyph_count, int x);
00132 ~VisualRun();
00133 Font *getFont() const;
00134 int getGlyphCount() const;
00135 const GlyphID *getGlyphs() const;
00136 float *getPositions() const;
00137 int getLeading() const;
00138 };
00139
00141 class Line : public AutoDeleteSmallVector<VisualRun *, 4> {
00142 public:
00143 int getLeading() const;
00144 int getWidth() const;
00145 int countRuns() const;
00146 VisualRun *getVisualRun(int run) const;
00147 };
00148
00149 const WChar *buffer_begin;
00150 const WChar *buffer;
00151 FontMap &runs;
00152
00153 ParagraphLayout(WChar *buffer, int length, FontMap &runs);
00154 void reflow();
00155 Line *nextLine(int max_width);
00156 };
00157 #endif
00158
00164 class Layouter : public AutoDeleteSmallVector<ParagraphLayout::Line *, 4> {
00165 #ifdef WITH_ICU
00166 typedef UChar CharType;
00167 #else
00168 typedef WChar CharType;
00169 #endif
00170
00171 size_t AppendToBuffer(CharType *buff, const CharType *buffer_last, WChar c);
00172 ParagraphLayout *GetParagraphLayout(CharType *buff, CharType *buff_end, FontMap &fontMapping);
00173
00175 struct LineCacheKey {
00176 FontState state_before;
00177 std::string str;
00178
00180 bool operator<(const LineCacheKey &other) const
00181 {
00182 if (this->state_before.fontsize != other.state_before.fontsize) return this->state_before.fontsize < other.state_before.fontsize;
00183 if (this->state_before.cur_colour != other.state_before.cur_colour) return this->state_before.cur_colour < other.state_before.cur_colour;
00184 if (this->state_before.prev_colour != other.state_before.prev_colour) return this->state_before.prev_colour < other.state_before.prev_colour;
00185 return this->str < other.str;
00186 }
00187 };
00189 struct LineCacheItem {
00190
00191 CharType buffer[DRAW_STRING_BUFFER];
00192 FontMap runs;
00193
00194 FontState state_after;
00195 ParagraphLayout *layout;
00196
00197 LineCacheItem() : layout(NULL) {}
00198 ~LineCacheItem() { delete layout; }
00199 };
00200 typedef std::map<LineCacheKey, LineCacheItem> LineCache;
00201 static LineCache *linecache;
00202
00203 static LineCacheItem &GetCachedParagraphLayout(const char *str, size_t len, const FontState &state);
00204
00205 typedef SmallMap<TextColour, Font *> FontColourMap;
00206 static FontColourMap fonts[FS_END];
00207 static Font *GetFont(FontSize size, TextColour colour);
00208
00209 public:
00210 Layouter(const char *str, int maxw = INT32_MAX, TextColour colour = TC_FROMSTRING, FontSize fontsize = FS_NORMAL);
00211 Dimension GetBounds();
00212
00213 static void ResetFontCache(FontSize size);
00214 static void ResetLineCache();
00215 static void ReduceLineCache();
00216 };
00217
00218 #endif