michael@0: #import <UIKit/UIKit.h>
michael@0: 
michael@0: #include "SkStream_NSData.h"
michael@0: #include "SkTypeface.h"
michael@0: #include "SkFontHost.h"
michael@0: #include "SkThread.h"
michael@0: #include "SkTemplates.h"
michael@0: 
michael@0: enum FontDesign {
michael@0:     kUnknown_Design,
michael@0:     kSans_FontDesign,
michael@0:     kSerif_FontDesign,
michael@0: 
michael@0:     kIllegal_FontDesign,    // never use with a real font
michael@0: };
michael@0: 
michael@0: // returns kIllegal_FontDesign if not found
michael@0: static FontDesign find_design_from_name(const char name[]) {
michael@0:     static const struct {
michael@0:         const char* fName;
michael@0:         FontDesign  fDesign;
michael@0:     } gRec[] = {
michael@0:         { "sans-serif", kSans_FontDesign },
michael@0:         { "serif",      kSerif_FontDesign },
michael@0:     };
michael@0: 
michael@0:     for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
michael@0:         if (!strcasecmp(name, gRec[i].fName)) {
michael@0:             return gRec[i].fDesign;
michael@0:         }
michael@0:     }
michael@0:     return kIllegal_FontDesign;
michael@0: }
michael@0: 
michael@0: struct FontRes {
michael@0:     const char*         fName;
michael@0:     SkTypeface::Style   fStyle;
michael@0:     FontDesign          fDesign;
michael@0: };
michael@0: 
michael@0: static const FontRes gFontRes[] = {
michael@0:     { "DroidSans",          SkTypeface::kNormal,    kSans_FontDesign    },
michael@0:     { "DroidSans",          SkTypeface::kBold,      kSans_FontDesign    },
michael@0:     { "DroidSerif-Regular", SkTypeface::kNormal,    kSerif_FontDesign    },
michael@0:     { "DroidSerif-Bold",    SkTypeface::kBold,      kSerif_FontDesign    },
michael@0: //    { "PescaderoPro",       SkTypeface::kNormal,    kSerif_FontDesign   },
michael@0: //    { "PescaderoPro-Bold",  SkTypeface::kBold,      kSerif_FontDesign   },
michael@0: };
michael@0: #define FONTRES_COUNT SK_ARRAY_COUNT(gFontRes)
michael@0: 
michael@0: #define DEFAULT_INDEX_REGULAR   1
michael@0: #define DEFAULT_INDEX_BOLD      2
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: class SkTypeface_Stream : public SkTypeface {
michael@0: public:
michael@0:     SkTypeface_Stream(SkStream* stream, Style style);
michael@0:     virtual ~SkTypeface_Stream();
michael@0: 
michael@0:     SkStream* refStream() {
michael@0:         fStream->ref();
michael@0:         return fStream;
michael@0:     }
michael@0: 
michael@0: private:
michael@0:     SkStream*   fStream;
michael@0: };
michael@0: 
michael@0: static int32_t gUniqueFontID;
michael@0: 
michael@0: SkTypeface_Stream::SkTypeface_Stream(SkStream* stream, Style style)
michael@0: : SkTypeface(style, sk_atomic_inc(&gUniqueFontID) + 1) {
michael@0:     fStream = stream;
michael@0:     fStream->ref();
michael@0: }
michael@0: 
michael@0: SkTypeface_Stream::~SkTypeface_Stream() {
michael@0:     fStream->unref();
michael@0: }
michael@0: 
michael@0: static SkTypeface_Stream* create_from_fontres(const FontRes& res) {
michael@0:     SkStream* stream = SkStream_NSData::CreateFromResource(res.fName, "ttf");
michael@0:     SkAutoUnref aur(stream);
michael@0: 
michael@0:     return SkNEW_ARGS(SkTypeface_Stream, (stream, res.fStyle));
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: static int compute_style_distance(SkTypeface::Style a, SkTypeface::Style b) {
michael@0:     int dist = 0;
michael@0:     int diff = a ^ b;
michael@0:     if (diff & SkTypeface::kBold) {
michael@0:         dist += 2;
michael@0:     }
michael@0:     if (diff & SkTypeface::kItalic) {
michael@0:         dist += 1;
michael@0:     }
michael@0:     return dist;
michael@0: }
michael@0: 
michael@0: static SkTypeface_Stream* gFonts[FONTRES_COUNT];
michael@0: 
michael@0: static void assure_init_fonts() {
michael@0:     static bool gOnce;
michael@0:     if (!gOnce) {
michael@0:         for (size_t i = 0; i < FONTRES_COUNT; i++) {
michael@0:             gFonts[i] = create_from_fontres(gFontRes[i]);
michael@0:             gOnce = true;
michael@0:         }
michael@0:     }
michael@0: }
michael@0: 
michael@0: static SkTypeface_Stream* get_default_font(SkTypeface::Style style) {
michael@0:     assure_init_fonts();
michael@0: 
michael@0:     if (style & SkTypeface::kBold) {
michael@0:         return gFonts[DEFAULT_INDEX_BOLD];
michael@0:     } else {
michael@0:         return gFonts[DEFAULT_INDEX_REGULAR];
michael@0:     }
michael@0: }
michael@0: 
michael@0: static SkTypeface_Stream* find_by_id(SkFontID fontID) {
michael@0:     assure_init_fonts();
michael@0:     
michael@0:     for (size_t i = 0; i < FONTRES_COUNT; i++) {
michael@0:         if (gFonts[i]->uniqueID() == fontID) {
michael@0:             return gFonts[i];
michael@0:         }
michael@0:     }
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: template <typename T> T* ref_and_return(T* obj) {
michael@0:     obj->ref();
michael@0:     return obj;
michael@0: }
michael@0: 
michael@0: SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
michael@0:                                      const char familyName[],
michael@0:                                      const void* data, size_t bytelength,
michael@0:                                      SkTypeface::Style style) {
michael@0:     assure_init_fonts();
michael@0: 
michael@0:     if (familyName) {
michael@0:         FontDesign design = find_design_from_name(familyName);
michael@0:         if (kIllegal_FontDesign != design) {
michael@0:             familyName = "$#@*&%*#$@ never match any name";
michael@0:         }
michael@0: 
michael@0:         int bestDistance = 999;
michael@0:         int bestIndex = -1;
michael@0:         for (size_t i = 0; i < FONTRES_COUNT; i++) {
michael@0:             if (design == gFontRes[i].fDesign || !strcmp(gFontRes[i].fName, familyName)) {
michael@0:                 int dist = compute_style_distance(style, gFontRes[i].fStyle);
michael@0:                 if (dist < bestDistance) {
michael@0:                     bestDistance = dist;
michael@0:                     bestIndex = i;
michael@0:                 }
michael@0:             }
michael@0:         }
michael@0:         if (bestIndex >= 0) {
michael@0:             return ref_and_return(gFonts[bestIndex]);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     return ref_and_return(get_default_font(style));
michael@0: }
michael@0: 
michael@0: SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) {
michael@0:     SkDEBUGFAIL("SkFontHost::CreateTypeface unimplemented");
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: SkTypeface* SkFontHost::CreateTypefaceFromFile(char const*) {
michael@0: //    SkDEBUGFAIL("SkFontHost::CreateTypefaceFromFile unimplemented");
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkStream* SkFontHost::OpenStream(uint32_t uniqueID) {
michael@0:     SkTypeface_Stream* tf = find_by_id(uniqueID);
michael@0:     SkASSERT(tf);
michael@0:     return tf->refStream();
michael@0: }
michael@0: 
michael@0: size_t SkFontHost::GetFileName(SkFontID fontID, char path[], size_t length,
michael@0:                                int32_t* index) {
michael@0:     SkDebugf("SkFontHost::GetFileName unimplemented\n");
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) {
michael@0:     SkDEBUGFAIL("SkFontHost::Serialize unimplemented");
michael@0: }
michael@0: 
michael@0: SkTypeface* SkFontHost::Deserialize(SkStream* stream) {
michael@0:     int style = stream->readU8();
michael@0:     int len = stream->readPackedUInt();
michael@0:     const char* name = NULL;
michael@0:     if (len > 0) {
michael@0:         SkString str;
michael@0:         str.resize(len);
michael@0:         stream->read(str.writable_str(), len);
michael@0:         
michael@0:         if (str.startsWith("DroidSans")) {
michael@0:             name = "sans-serif";
michael@0:         } else if (str.startsWith("DroidSerif")) {
michael@0:             name = "serif";
michael@0:         }
michael@0:         SkDebugf("---- deserialize typeface <%s> %d %s\n", str.c_str(), style, name);
michael@0:     }
michael@0: //    name = NULL; style = 0;
michael@0:     return SkFontHost::CreateTypeface(NULL, name, NULL, NULL,
michael@0:                                       (SkTypeface::Style)style);
michael@0: }
michael@0: 
michael@0: SkFontID SkFontHost::NextLogicalFont(SkFontID currFontID, SkFontID origFontID) {
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: #define FONT_CACHE_MEMORY_BUDGET    1 * 1024 * 1024
michael@0: 
michael@0: size_t SkFontHost::ShouldPurgeFontCache(size_t sizeAllocatedSoFar) {
michael@0:     if (sizeAllocatedSoFar > FONT_CACHE_MEMORY_BUDGET)
michael@0:         return sizeAllocatedSoFar - FONT_CACHE_MEMORY_BUDGET;
michael@0:     else
michael@0:         return 0;   // nothing to do
michael@0: }
michael@0: 
michael@0: ///////////////////////////////////////////////////////////////////////////////
michael@0: int SkFontHost::ComputeGammaFlag(const SkPaint& paint) {
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: void SkFontHost::GetGammaTables(const uint8_t* tables[2]) {
michael@0:     tables[0] = NULL;   // black gamma (e.g. exp=1.4)
michael@0:     tables[1] = NULL;   // white gamma (e.g. exp= 1/1.4)
michael@0: }
michael@0: 
michael@0: // static
michael@0: SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics(
michael@0:                                                                   uint32_t fontID,
michael@0:                                                                   SkAdvancedTypefaceMetrics::PerGlyphInfo perGlyphInfo) {
michael@0:     SkDEBUGFAIL("SkFontHost::GetAdvancedTypefaceMetrics unimplemented");
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: void SkFontHost::FilterRec(SkScalerContext::Rec* rec, SkTypeface*) {
michael@0: }
michael@0: 
michael@0: SkScalerContext* SkFontHost::CreateScalerContext(const SkDescriptor* desc) {
michael@0:     SkDEBUGFAIL("SkFontHost::CreateScalarContext unimplemented");
michael@0:     return NULL;
michael@0: }