remove obsolete/abandoned font backend

git-svn-id: http://skia.googlecode.com/svn/trunk@8322 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 0 insertions, 598 deletions

diff --git a/src/ports/SkFontHost_simple.cpp b/src/ports/SkFontHost_simple.cpp
deleted file mode 100644
index c1208d04e4..0000000000
--- a/src/ports/SkFontHost_simple.cpp
+++ /dev/null
@@ -1,598 +0,0 @@
-
-/*
- * Copyright 2011 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkFontHost.h"
-#include "SkDescriptor.h"
-#include "SkPaint.h"
-#include "SkString.h"
-#include "SkStream.h"
-#include "SkThread.h"
-#include "SkTSearch.h"
-#include <stdio.h>
-
-#ifdef SK_BUILD_FOR_MAC
-    #define SK_FONT_FILE_PREFIX     "/Library/Fonts/"
-#else
-    #define SK_FONT_FILE_PREFIX          "/skimages/"
-#endif
-
-bool find_name_and_attributes(SkStream* stream, SkString* name,
-                              SkTypeface::Style* style, bool* isFixedWidth);
-
-static void GetFullPathForSysFonts(SkString* full, const char name[]) {
-    full->set(SK_FONT_FILE_PREFIX);
-    full->append(name);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-struct FamilyRec;
-
-/*  This guy holds a mapping of a name -> family, used for looking up fonts.
-    Since it is stored in a stretchy array that doesn't preserve object
-    semantics, we don't use constructor/destructors, but just have explicit
-    helpers to manage our internal bookkeeping.
-*/
-struct NameFamilyPair {
-    const char* fName;      // we own this
-    FamilyRec*  fFamily;    // we don't own this, we just reference it
-
-    void construct(const char name[], FamilyRec* family) {
-        fName = strdup(name);
-        fFamily = family;   // we don't own this, so just record the referene
-    }
-
-    void destruct() {
-        free((char*)fName);
-        // we don't own family, so just ignore our reference
-    }
-};
-
-// we use atomic_inc to grow this for each typeface we create
-static int32_t gUniqueFontID;
-
-// this is the mutex that protects these globals
-SK_DECLARE_STATIC_MUTEX(gFamilyMutex);
-static FamilyRec* gFamilyHead;
-static SkTDArray<NameFamilyPair> gNameList;
-
-struct FamilyRec {
-    FamilyRec*  fNext;
-    SkTypeface* fFaces[4];
-
-    FamilyRec()
-    {
-        fNext = gFamilyHead;
-        memset(fFaces, 0, sizeof(fFaces));
-        gFamilyHead = this;
-    }
-};
-
-static SkTypeface* find_best_face(const FamilyRec* family,
-                                  SkTypeface::Style style) {
-    SkTypeface* const* faces = family->fFaces;
-
-    if (faces[style] != NULL) { // exact match
-        return faces[style];
-    }
-    // look for a matching bold
-    style = (SkTypeface::Style)(style ^ SkTypeface::kItalic);
-    if (faces[style] != NULL) {
-        return faces[style];
-    }
-    // look for the plain
-    if (faces[SkTypeface::kNormal] != NULL) {
-        return faces[SkTypeface::kNormal];
-    }
-    // look for anything
-    for (int i = 0; i < 4; i++) {
-        if (faces[i] != NULL) {
-            return faces[i];
-        }
-    }
-    // should never get here, since the faces list should not be empty
-    SkDEBUGFAIL("faces list is empty");
-    return NULL;
-}
-
-static FamilyRec* find_family(const SkTypeface* member) {
-    FamilyRec* curr = gFamilyHead;
-    while (curr != NULL) {
-        for (int i = 0; i < 4; i++) {
-            if (curr->fFaces[i] == member) {
-                return curr;
-            }
-        }
-        curr = curr->fNext;
-    }
-    return NULL;
-}
-
-/*  Returns the matching typeface, or NULL. If a typeface is found, its refcnt
-    is not modified.
- */
-static SkTypeface* find_from_uniqueID(uint32_t uniqueID) {
-    FamilyRec* curr = gFamilyHead;
-    while (curr != NULL) {
-        for (int i = 0; i < 4; i++) {
-            SkTypeface* face = curr->fFaces[i];
-            if (face != NULL && face->uniqueID() == uniqueID) {
-                return face;
-            }
-        }
-        curr = curr->fNext;
-    }
-    return NULL;
-}
-
-/*  Remove reference to this face from its family. If the resulting family
-    is empty (has no faces), return that family, otherwise return NULL
-*/
-static FamilyRec* remove_from_family(const SkTypeface* face) {
-    FamilyRec* family = find_family(face);
-    SkASSERT(family->fFaces[face->style()] == face);
-    family->fFaces[face->style()] = NULL;
-
-    for (int i = 0; i < 4; i++) {
-        if (family->fFaces[i] != NULL) {    // family is non-empty
-            return NULL;
-        }
-    }
-    return family;  // return the empty family
-}
-
-// maybe we should make FamilyRec be doubly-linked
-static void detach_and_delete_family(FamilyRec* family) {
-    FamilyRec* curr = gFamilyHead;
-    FamilyRec* prev = NULL;
-
-    while (curr != NULL) {
-        FamilyRec* next = curr->fNext;
-        if (curr == family) {
-            if (prev == NULL) {
-                gFamilyHead = next;
-            } else {
-                prev->fNext = next;
-            }
-            SkDELETE(family);
-            return;
-        }
-        prev = curr;
-        curr = next;
-    }
-    SkDEBUGFAIL("Yikes, couldn't find family in our list to remove/delete");
-}
-
-static SkTypeface* find_typeface(const char name[], SkTypeface::Style style) {
-    NameFamilyPair* list = gNameList.begin();
-    int             count = gNameList.count();
-
-    int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0]));
-
-    if (index >= 0) {
-        return find_best_face(list[index].fFamily, style);
-    }
-    return NULL;
-}
-
-static SkTypeface* find_typeface(const SkTypeface* familyMember,
-                                 SkTypeface::Style style) {
-    const FamilyRec* family = find_family(familyMember);
-    return family ? find_best_face(family, style) : NULL;
-}
-
-static void add_name(const char name[], FamilyRec* family) {
-    SkAutoAsciiToLC tolc(name);
-    name = tolc.lc();
-
-    NameFamilyPair* list = gNameList.begin();
-    int             count = gNameList.count();
-
-    int index = SkStrLCSearch(&list[0].fName, count, name, sizeof(list[0]));
-
-    if (index < 0) {
-        list = gNameList.insert(~index);
-        list->construct(name, family);
-    }
-}
-
-static void remove_from_names(FamilyRec* emptyFamily)
-{
-#ifdef SK_DEBUG
-    for (int i = 0; i < 4; i++) {
-        SkASSERT(emptyFamily->fFaces[i] == NULL);
-    }
-#endif
-
-    SkTDArray<NameFamilyPair>& list = gNameList;
-
-    // must go backwards when removing
-    for (int i = list.count() - 1; i >= 0; --i) {
-        NameFamilyPair* pair = &list[i];
-        if (pair->fFamily == emptyFamily) {
-            pair->destruct();
-            list.remove(i);
-        }
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-class FamilyTypeface : public SkTypeface {
-public:
-    FamilyTypeface(Style style, bool sysFont, SkTypeface* familyMember)
-    : SkTypeface(style, sk_atomic_inc(&gUniqueFontID) + 1) {
-        fIsSysFont = sysFont;
-
-        SkAutoMutexAcquire  ac(gFamilyMutex);
-
-        FamilyRec* rec = NULL;
-        if (familyMember) {
-            rec = find_family(familyMember);
-            SkASSERT(rec);
-        } else {
-            rec = SkNEW(FamilyRec);
-        }
-        rec->fFaces[style] = this;
-    }
-
-    virtual ~FamilyTypeface() {
-        SkAutoMutexAcquire  ac(gFamilyMutex);
-
-        // remove us from our family. If the family is now empty, we return
-        // that and then remove that family from the name list
-        FamilyRec* family = remove_from_family(this);
-        if (NULL != family) {
-            remove_from_names(family);
-            detach_and_delete_family(family);
-        }
-    }
-
-    bool isSysFont() const { return fIsSysFont; }
-
-    virtual SkStream* openStream() = 0;
-    virtual const char* getUniqueString() const = 0;
-    virtual const char* getFilePath() const = 0;
-
-protected:
-    virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics(
-                                    SkAdvancedTypefaceMetrics::PerGlyphInfo,
-                                    const uint32_t*,
-                                    uint32_t) const SK_OVERRIDE {
-        return NULL;
-    }
-
-private:
-    bool    fIsSysFont;
-
-    typedef SkTypeface INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-
-class StreamTypeface : public FamilyTypeface {
-public:
-    StreamTypeface(Style style, bool sysFont, SkTypeface* familyMember,
-                   SkStream* stream)
-    : INHERITED(style, sysFont, familyMember) {
-        SkASSERT(stream);
-        stream->ref();
-        fStream = stream;
-    }
-    virtual ~StreamTypeface() {
-        fStream->unref();
-    }
-
-    // overrides
-    virtual SkStream* openStream() {
-        // we just ref our existing stream, since the caller will call unref()
-        // when they are through
-        fStream->ref();
-        return fStream;
-    }
-    virtual const char* getUniqueString() const { return NULL; }
-    virtual const char* getFilePath() const { return NULL; }
-
-private:
-    SkStream* fStream;
-
-    typedef FamilyTypeface INHERITED;
-};
-
-class FileTypeface : public FamilyTypeface {
-public:
-    FileTypeface(Style style, bool sysFont, SkTypeface* familyMember,
-                 const char path[])
-    : INHERITED(style, sysFont, familyMember) {
-        SkString fullpath;
-
-        if (sysFont) {
-            GetFullPathForSysFonts(&fullpath, path);
-            path = fullpath.c_str();
-        }
-        fPath.set(path);
-    }
-
-    virtual SkStream* openStream() SK_OVERRIDE {
-        return SkStream::NewFromFile(fPath.c_str());
-    }
-
-    virtual const char* getUniqueString() const SK_OVERRIDE {
-        const char* str = strrchr(fPath.c_str(), '/');
-        if (str) {
-            str += 1;   // skip the '/'
-        }
-        return str;
-    }
-    virtual const char* getFilePath() const SK_OVERRIDE {
-        return fPath.c_str();
-    }
-
-private:
-    SkString fPath;
-
-    typedef FamilyTypeface INHERITED;
-};
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-
-static bool get_name_and_style(const char path[], SkString* name,
-                               SkTypeface::Style* style, bool isExpected) {
-    SkString        fullpath;
-    GetFullPathForSysFonts(&fullpath, path);
-
-    SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(fullpath.c_str()));
-    if (stream.get()) {
-        return find_name_and_attributes(&stream, name, style, NULL);
-    } else {
-        if (isExpected) {
-            SkDebugf("---- failed to open <%s> as a font\n", fullpath.c_str());
-        }
-        return false;
-    }
-}
-
-// used to record our notion of the pre-existing fonts
-struct FontInitRec {
-    const char*         fFileName;
-    const char* const*  fNames;     // null-terminated list
-};
-
-static const char* gSansNames[] = {
-    "sans-serif", "arial", "helvetica", "tahoma", "verdana", NULL
-};
-
-static const char* gSerifNames[] = {
-    "serif", "times", "times new roman", "palatino", "georgia", "baskerville",
-    "goudy", "fantasy", "cursive", "ITC Stone Serif", NULL
-};
-
-static const char* gMonoNames[] = {
-    "monospace", "courier", "courier new", "monaco", NULL
-};
-
-// deliberately empty, but we use the address to identify fallback fonts
-static const char* gFBNames[] = { NULL };
-
-/*  Fonts must be grouped by family, with the first font in a family having the
-    list of names (even if that list is empty), and the following members having
-    null for the list. The names list must be NULL-terminated
-*/
-static const FontInitRec gSystemFonts[] = {
-    { "Arial.ttf",              gSansNames  },
-    { "Times.ttf",              gSerifNames  },
-    { "samplefont.ttf",              gSansNames  },
-};
-
-#define DEFAULT_NAMES   gSansNames
-
-// these globals are assigned (once) by load_system_fonts()
-static FamilyRec* gDefaultFamily;
-static SkTypeface* gDefaultNormal;
-
-/*  This is sized conservatively, assuming that it will never be a size issue.
-    It will be initialized in load_system_fonts(), and will be filled with the
-    fontIDs that can be used for fallback consideration, in sorted order (sorted
-    meaning element[0] should be used first, then element[1], etc. When we hit
-    a fontID==0 in the array, the list is done, hence our allocation size is
-    +1 the total number of possible system fonts. Also see NextLogicalTypeface().
- */
-static uint32_t gFallbackFonts[SK_ARRAY_COUNT(gSystemFonts)+1];
-
-/*  Called once (ensured by the sentinel check at the beginning of our body).
-    Initializes all the globals, and register the system fonts.
- */
-static void load_system_fonts() {
-    // check if we've already be called
-    if (NULL != gDefaultNormal) {
-        return;
-    }
-
-    const FontInitRec* rec = gSystemFonts;
-    SkTypeface* firstInFamily = NULL;
-    int fallbackCount = 0;
-
-    for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) {
-        // if we're the first in a new family, clear firstInFamily
-        if (rec[i].fNames != NULL) {
-            firstInFamily = NULL;
-        }
-
-        SkString name;
-        SkTypeface::Style style;
-
-        // we expect all the fonts, except the "fallback" fonts
-        bool isExpected = (rec[i].fNames != gFBNames);
-        if (!get_name_and_style(rec[i].fFileName, &name, &style, isExpected)) {
-            continue;
-        }
-
-        SkTypeface* tf = SkNEW_ARGS(FileTypeface,
-                                    (style,
-                                     true,  // system-font (cannot delete)
-                                     firstInFamily, // what family to join
-                                     rec[i].fFileName) // filename
-                                    );
-
-        if (rec[i].fNames != NULL) {
-            // see if this is one of our fallback fonts
-            if (rec[i].fNames == gFBNames) {
-            //    SkDebugf("---- adding %s as fallback[%d] fontID %d\n",
-            //             rec[i].fFileName, fallbackCount, tf->uniqueID());
-                gFallbackFonts[fallbackCount++] = tf->uniqueID();
-            }
-
-            firstInFamily = tf;
-            FamilyRec* family = find_family(tf);
-            const char* const* names = rec[i].fNames;
-
-            // record the default family if this is it
-            if (names == DEFAULT_NAMES) {
-                gDefaultFamily = family;
-            }
-            // add the names to map to this family
-            while (*names) {
-                add_name(*names, family);
-                names += 1;
-            }
-        }
-    }
-
-    // do this after all fonts are loaded. This is our default font, and it
-    // acts as a sentinel so we only execute load_system_fonts() once
-    gDefaultNormal = find_best_face(gDefaultFamily, SkTypeface::kNormal);
-    // now terminate our fallback list with the sentinel value
-    gFallbackFonts[fallbackCount] = 0;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-void SkFontHost::Serialize(const SkTypeface* face, SkWStream* stream) {
-    const char* name = ((FamilyTypeface*)face)->getUniqueString();
-
-    stream->write8((uint8_t)face->style());
-
-    if (NULL == name || 0 == *name) {
-        stream->writePackedUInt(0);
-//        SkDebugf("--- fonthost serialize null\n");
-    } else {
-        uint32_t len = strlen(name);
-        stream->writePackedUInt(len);
-        stream->write(name, len);
-//      SkDebugf("--- fonthost serialize <%s> %d\n", name, face->style());
-    }
-}
-
-SkTypeface* SkFontHost::Deserialize(SkStream* stream) {
-    load_system_fonts();
-
-    int style = stream->readU8();
-
-    int len = stream->readPackedUInt();
-    if (len > 0) {
-        SkString str;
-        str.resize(len);
-        stream->read(str.writable_str(), len);
-
-        const FontInitRec* rec = gSystemFonts;
-        for (size_t i = 0; i < SK_ARRAY_COUNT(gSystemFonts); i++) {
-            if (strcmp(rec[i].fFileName, str.c_str()) == 0) {
-                // backup until we hit the fNames
-                for (int j = i; j >= 0; --j) {
-                    if (rec[j].fNames != NULL) {
-                        return SkFontHost::CreateTypeface(NULL,
-                                    rec[j].fNames[0], (SkTypeface::Style)style);
-                    }
-                }
-            }
-        }
-    }
-    return NULL;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkTypeface* SkFontHost::CreateTypeface(const SkTypeface* familyFace,
-                                       const char familyName[],
-                                       SkTypeface::Style style) {
-    load_system_fonts();
-
-    SkAutoMutexAcquire  ac(gFamilyMutex);
-
-    // clip to legal style bits
-    style = (SkTypeface::Style)(style & SkTypeface::kBoldItalic);
-
-    SkTypeface* tf = NULL;
-
-    if (NULL != familyFace) {
-        tf = find_typeface(familyFace, style);
-    } else if (NULL != familyName) {
-//        SkDebugf("======= familyName <%s>\n", familyName);
-        tf = find_typeface(familyName, style);
-    }
-
-    if (NULL == tf) {
-        tf = find_best_face(gDefaultFamily, style);
-    }
-
-    // we ref(), since the symantic is to return a new instance
-    tf->ref();
-    return tf;
-}
-
-SkStream* SkFontHost::OpenStream(uint32_t fontID) {
-    SkAutoMutexAcquire  ac(gFamilyMutex);
-
-    FamilyTypeface* tf = (FamilyTypeface*)find_from_uniqueID(fontID);
-    SkStream* stream = tf ? tf->openStream() : NULL;
-
-    if (stream && stream->getLength() == 0) {
-        stream->unref();
-        stream = NULL;
-    }
-    return stream;
-}
-
-SkTypeface* SkFontHost::NextLogicalTypeface(SkFontID currFontID, SkFontID origFontID) {
-    load_system_fonts();
-
-    /*  First see if fontID is already one of our fallbacks. If so, return
-        its successor. If fontID is not in our list, then return the first one
-        in our list. Note: list is zero-terminated, and returning zero means
-        we have no more fonts to use for fallbacks.
-     */
-    const uint32_t* list = gFallbackFonts;
-    for (int i = 0; list[i] != 0; i++) {
-        if (list[i] == currFontID) {
-            return SkSafeRef(find_from_uniqueID(list[i+1]));
-        }
-    }
-    return SkSafeRef(list[0]);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-SkTypeface* SkFontHost::CreateTypefaceFromStream(SkStream* stream) {
-    if (NULL == stream || stream->getLength() <= 0) {
-        return NULL;
-    }
-
-    SkTypeface::Style style;
-    if (find_name_and_attributes(stream, NULL, &style, NULL)) {
-        return SkNEW_ARGS(StreamTypeface, (style, false, NULL, stream));
-    } else {
-        return NULL;
-    }
-}
-
-SkTypeface* SkFontHost::CreateTypefaceFromFile(const char path[]) {
-    SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
-    return stream.get() ? SkFontHost::CreateTypefaceFromStream(stream) : NULL;
-}