1#include "SkScalerContext.h" 2#include "SkBitmap.h" 3#include "SkCanvas.h" 4#include "SkDescriptor.h" 5#include "SkFDot6.h" 6#include "SkFontHost.h" 7#include "SkMask.h" 8#include "SkStream.h" 9#include "SkString.h" 10#include "SkThread.h" 11#include "SkTemplates.h" 12 13#include <acaapi.h> 14 15////////////////////////////////////////////////////////////////////////// 16 17#include "SkMMapStream.h" 18 19class SkScalerContext_Ascender : public SkScalerContext { 20public: 21 SkScalerContext_Ascender(const SkDescriptor* desc); 22 virtual ~SkScalerContext_Ascender(); 23 24protected: 25 virtual unsigned generateGlyphCount(); 26 virtual uint16_t generateCharToGlyph(SkUnichar uni); 27 virtual void generateMetrics(SkGlyph* glyph); 28 virtual void generateImage(const SkGlyph& glyph); 29 virtual void generatePath(const SkGlyph& glyph, SkPath* path); 30 virtual void generateFontMetrics(SkPaint::FontMetrics* mx, SkPaint::FontMetrics* my); 31 32private: 33 aca_FontHandle fHandle; 34 void* fWorkspace; 35 void* fGlyphWorkspace; 36 SkStream* fFontStream; 37 SkStream* fHintStream; 38}; 39 40/////////////////////////////////////////////////////////////////////////// 41/////////////////////////////////////////////////////////////////////////// 42 43SkScalerContext_Ascender::SkScalerContext_Ascender(const SkDescriptor* desc) 44 : SkScalerContext(desc) 45{ 46 int size = aca_Get_FontHandleRec_Size(); 47 fHandle = (aca_FontHandle)sk_malloc_throw(size); 48 49 // get the pointer to the font 50 51 fFontStream = new SkMMAPStream("/UcsGB2312-Hei-H.FDL"); 52 fHintStream = new SkMMAPStream("/genv6-23.bin"); 53 54 void* hints = sk_malloc_throw(fHintStream->getLength()); 55 memcpy(hints, fHintStream->getMemoryBase(), fHintStream->getLength()); 56 57 aca_Create_Font_Handle(fHandle, 58 (void*)fFontStream->getMemoryBase(), fFontStream->getLength(), 59 "fred", 60 hints, fHintStream->getLength()); 61 62 // compute our factors from the record 63 64 SkMatrix m; 65 66 fRec.getSingleMatrix(&m); 67 68 // now compute our scale factors 69 SkScalar sx = m.getScaleX(); 70 SkScalar sy = m.getScaleY(); 71 72 int ppemX = SkScalarRound(sx); 73 int ppemY = SkScalarRound(sy); 74 75 size = aca_Find_Font_Memory_Required(fHandle, ppemX, ppemY); 76 size *= 8; // Jeff suggests this :) 77 fWorkspace = sk_malloc_throw(size); 78 aca_Set_Font_Memory(fHandle, (uint8_t*)fWorkspace, size); 79 80 aca_GlyphAttribsRec rec; 81 82 memset(&rec, 0, sizeof(rec)); 83 rec.xSize = ppemX; 84 rec.ySize = ppemY; 85 rec.doAdjust = true; 86 rec.doExceptions = true; 87 rec.doGlyphHints = true; 88 rec.doInterpolate = true; 89 rec.grayMode = 2; 90 aca_Set_Font_Attributes(fHandle, &rec, &size); 91 92 fGlyphWorkspace = sk_malloc_throw(size); 93 aca_Set_Glyph_Memory(fHandle, fGlyphWorkspace); 94} 95 96SkScalerContext_Ascender::~SkScalerContext_Ascender() 97{ 98 delete fHintStream; 99 delete fFontStream; 100 sk_free(fGlyphWorkspace); 101 sk_free(fWorkspace); 102 sk_free(fHandle); 103} 104 105unsigned SkScalerContext_Ascender::generateGlyphCount() 106{ 107 return 1000; 108} 109 110uint16_t SkScalerContext_Ascender::generateCharToGlyph(SkUnichar uni) 111{ 112 return (uint16_t)(uni & 0xFFFF); 113} 114 115void SkScalerContext_Ascender::generateMetrics(SkGlyph* glyph) 116{ 117 glyph->fRsbDelta = 0; 118 glyph->fLsbDelta = 0; 119 120 aca_GlyphImageRec rec; 121 aca_Vector topLeft; 122 123 int adv = aca_Get_Adv_Width(fHandle, glyph->getGlyphID()); 124 if (aca_GLYPH_NOT_PRESENT == adv) 125 goto ERROR; 126 127 aca_Rasterize(glyph->getGlyphID(), fHandle, &rec, &topLeft); 128 129 if (false) // error 130 { 131ERROR: 132 glyph->fWidth = 0; 133 glyph->fHeight = 0; 134 glyph->fTop = 0; 135 glyph->fLeft = 0; 136 glyph->fAdvanceX = 0; 137 glyph->fAdvanceY = 0; 138 return; 139 } 140 141 glyph->fWidth = rec.width; 142 glyph->fHeight = rec.rows; 143 glyph->fRowBytes = rec.width; 144 glyph->fTop = -topLeft.y; 145 glyph->fLeft = topLeft.x; 146 glyph->fAdvanceX = SkIntToFixed(adv); 147 glyph->fAdvanceY = SkIntToFixed(0); 148} 149 150void SkScalerContext_Ascender::generateImage(const SkGlyph& glyph) 151{ 152 aca_GlyphImageRec rec; 153 aca_Vector topLeft; 154 155 aca_Rasterize(glyph.getGlyphID(), fHandle, &rec, &topLeft); 156 157 const uint8_t* src = (const uint8_t*)rec.buffer; 158 uint8_t* dst = (uint8_t*)glyph.fImage; 159 int height = glyph.fHeight; 160 161 src += rec.y0 * rec.pitch + rec.x0; 162 while (--height >= 0) 163 { 164 memcpy(dst, src, glyph.fWidth); 165 src += rec.pitch; 166 dst += glyph.fRowBytes; 167 } 168} 169 170/////////////////////////////////////////////////////////////////////////////////////////// 171 172void SkScalerContext_Ascender::generatePath(const SkGlyph& glyph, SkPath* path) 173{ 174 SkRect r; 175 176 r.set(0, 0, SkIntToScalar(4), SkIntToScalar(4)); 177 path->reset(); 178 path->addRect(r); 179} 180 181void SkScalerContext_Ascender::generateFontMetrics(SkPaint::FontMetrics* mx, SkPaint::FontMetrics* my) 182{ 183 if (NULL == mx && NULL == my) 184 return; 185 186 if (mx) 187 { 188 mx->fTop = SkIntToScalar(-16); 189 mx->fAscent = SkIntToScalar(-16); 190 mx->fDescent = SkIntToScalar(4); 191 mx->fBottom = SkIntToScalar(4); 192 mx->fLeading = 0; 193 194 // FIXME: 195 mx->fAvgCharWidth = 0; 196 mx->fXMin = 0; 197 mx->fXMax = 0; 198 mx->fXHeight = 0; 199 } 200 if (my) 201 { 202 my->fTop = SkIntToScalar(-16); 203 my->fAscent = SkIntToScalar(-16); 204 my->fDescent = SkIntToScalar(4); 205 my->fBottom = SkIntToScalar(4); 206 my->fLeading = 0; 207 208 // FIXME: 209 my->fAvgCharWidth = 0; 210 my->fXMin = 0; 211 my->fXMax = 0; 212 my->fXHeight = 0; 213 } 214} 215 216//////////////////////////////////////////////////////////////////////// 217//////////////////////////////////////////////////////////////////////// 218 219SkScalerContext* SkFontHost::CreateScalerContext(const SkDescriptor* desc) 220{ 221 return SkNEW_ARGS(SkScalerContext_Ascender, (desc)); 222} 223 224