check-point for new fontmgr on linux
git-svn-id: http://skia.googlecode.com/svn/trunk@8765 2bbb7eff-a529-9590-31e7-b0007b416f81
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reed@google.com
parent
72993ab542
commit
4ca890ecf5
@ -225,9 +225,300 @@ void FontConfigTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
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///////////////////////////////////////////////////////////////////////////////
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#include "SkFontMgr.h"
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// look for the last substring after a '/' and return that, or return null.
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static const char* find_just_name(const char* str) {
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const char* last = strrchr(str, '/');
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return last ? last + 1 : NULL;
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}
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SkFontMgr* SkFontMgr::Factory() {
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// todo
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static bool is_lower(char c) {
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return c >= 'a' && c <= 'z';
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}
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#include "SkFontMgr.h"
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#include <fontconfig/fontconfig.h>
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static int get_int(FcPattern* pattern, const char field[]) {
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int value;
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if (FcPatternGetInteger(pattern, field, 0, &value) != FcResultMatch) {
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value = SK_MinS32;
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}
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return value;
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}
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static const char* get_name(FcPattern* pattern, const char field[]) {
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const char* name;
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if (FcPatternGetString(pattern, field, 0, (FcChar8**)&name) != FcResultMatch) {
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name = "";
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}
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return name;
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}
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static bool valid_pattern(FcPattern* pattern) {
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FcBool is_scalable;
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if (FcPatternGetBool(pattern, FC_SCALABLE, 0, &is_scalable) != FcResultMatch || !is_scalable) {
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return false;
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}
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// fontconfig can also return fonts which are unreadable
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const char* c_filename = get_name(pattern, FC_FILE);
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if (0 == *c_filename) {
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return false;
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}
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if (access(c_filename, R_OK) != 0) {
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return false;
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}
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return true;
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}
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static bool match_name(FcPattern* pattern, const char family_name[]) {
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return !strcasecmp(family_name, get_name(pattern, FC_FAMILY));
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}
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static FcPattern** MatchFont(FcFontSet* font_set,
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const char post_config_family[],
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int* count) {
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// Older versions of fontconfig have a bug where they cannot select
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// only scalable fonts so we have to manually filter the results.
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FcPattern** iter = font_set->fonts;
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FcPattern** stop = iter + font_set->nfont;
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// find the first good match
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for (; iter < stop; ++iter) {
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if (valid_pattern(*iter)) {
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break;
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}
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}
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if (iter == stop || !match_name(*iter, post_config_family)) {
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return NULL;
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}
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FcPattern** firstIter = iter++;
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for (; iter < stop; ++iter) {
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if (!valid_pattern(*iter) || !match_name(*iter, post_config_family)) {
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break;
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}
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}
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*count = iter - firstIter;
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return firstIter;
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}
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class SkFontStyleSet_FC : public SkFontStyleSet {
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public:
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SkFontStyleSet_FC(FcPattern** matches, int count);
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virtual ~SkFontStyleSet_FC();
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virtual int count() SK_OVERRIDE { return fRecCount; }
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virtual void getStyle(int index, SkFontStyle*, SkString* style) SK_OVERRIDE;
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virtual SkTypeface* createTypeface(int index) SK_OVERRIDE;
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virtual SkTypeface* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE;
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private:
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struct Rec {
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SkString fStyleName;
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SkString fFileName;
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SkFontStyle fStyle;
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};
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Rec* fRecs;
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int fRecCount;
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};
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static int map_range(int value,
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int old_min, int old_max, int new_min, int new_max) {
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SkASSERT(old_min < old_max);
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SkASSERT(new_min < new_max);
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return new_min + SkMulDiv(value - old_min,
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new_max - new_min, old_max - old_min);
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}
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static SkFontStyle make_fontconfig_style(FcPattern* match) {
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int weight = get_int(match, FC_WEIGHT);
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int width = get_int(match, FC_WIDTH);
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int slant = get_int(match, FC_SLANT);
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// SkDebugf("old weight %d new weight %d\n", weight, map_range(weight, 0, 80, 0, 400));
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// fontconfig weight seems to be 0..200 or so, so we remap it here
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weight = map_range(weight, 0, 80, 0, 400);
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width = map_range(width, 0, 200, 0, 9);
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return SkFontStyle(weight, width, slant > 0 ? SkFontStyle::kItalic_Slant
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: SkFontStyle::kUpright_Slant);
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}
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SkFontStyleSet_FC::SkFontStyleSet_FC(FcPattern** matches, int count) {
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fRecCount = count;
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fRecs = SkNEW_ARRAY(Rec, count);
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for (int i = 0; i < count; ++i) {
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fRecs[i].fStyleName.set(get_name(matches[i], FC_STYLE));
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fRecs[i].fFileName.set(get_name(matches[i], FC_FILE));
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fRecs[i].fStyle = make_fontconfig_style(matches[i]);
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// SkDebugf("%s [%d %d %d]\n", fRecs[i].fFileName.c_str(), fRecs[i].fStyle.weight(), fRecs[i].fStyle.width(), fRecs[i].fStyle.isItalic());
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}
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}
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SkFontStyleSet_FC::~SkFontStyleSet_FC() {
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SkDELETE_ARRAY(fRecs);
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}
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void SkFontStyleSet_FC::getStyle(int index, SkFontStyle* style,
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SkString* styleName) {
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SkASSERT((unsigned)index < (unsigned)fRecCount);
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if (style) {
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*style = fRecs[index].fStyle;
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}
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if (styleName) {
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*styleName = fRecs[index].fStyleName;
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}
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}
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SkTypeface* SkFontStyleSet_FC::createTypeface(int index) {
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return NULL;
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}
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SkTypeface* SkFontStyleSet_FC::matchStyle(const SkFontStyle& pattern) {
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return NULL;
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}
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static bool find_name(const SkTDArray<const char*>& array, const char* name) {
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for (int i = 0; i < array.count(); ++i) {
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if (0 == strcmp(array[i], name)) {
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return true;
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}
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}
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return false;
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}
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class SkFontMgr_fontconfig : public SkFontMgr {
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SkAutoTUnref<SkFontConfigInterface> fFCI;
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int fFamilyCount;
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SkString* fFamilyNames;
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void init() {
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if (fFamilyCount >= 0) {
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return;
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}
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FcPattern* pat = FcPatternCreate();
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FcObjectSet* os = FcObjectSetBuild (FC_FAMILY, (char *) 0);
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FcFontSet* fs = FcFontList(NULL, pat, os);
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SkTDArray<const char*> familyNames;
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familyNames.setReserve(fs->nfont);
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for (int i=0; fs && i < fs->nfont; ++i) {
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FcPattern* match = fs->fonts[i];
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const char* famName = get_name(match, FC_FAMILY);
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if (!find_name(familyNames, famName)) {
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*familyNames.append() = famName;
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}
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// SkDebugf("[%d %d] %s %s %x\n", i, fs->nfont, get_name(match, FC_FILE),
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// get_name(match, FC_FAMILY), get_name(match, FC_FAMILY));
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}
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fFamilyCount = familyNames.count();
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fFamilyNames = SkNEW_ARRAY(SkString, fFamilyCount);
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for (int i = 0; i < fFamilyCount; ++i) {
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fFamilyNames[i].set(familyNames[i]);
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}
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if (fs) FcFontSetDestroy(fs);
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FcPatternDestroy(pat);
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}
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public:
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SkFontMgr_fontconfig(SkFontConfigInterface* fci) : fFCI(fci) {
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fFamilyCount = -1;
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}
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virtual ~SkFontMgr_fontconfig() {
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SkDELETE_ARRAY(fFamilyNames);
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}
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protected:
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virtual int onCountFamilies() { this->init(); return fFamilyCount; }
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virtual void onGetFamilyName(int index, SkString* familyName) {
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this->init();
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SkASSERT((unsigned)index < (unsigned)fFamilyCount);
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*familyName = fFamilyNames[index];
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}
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virtual SkFontStyleSet* onCreateStyleSet(int index) {
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this->init();
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SkASSERT((unsigned)index < (unsigned)fFamilyCount);
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return this->onMatchFamily(fFamilyNames[index].c_str());
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}
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virtual SkFontStyleSet* onMatchFamily(const char familyName[]) {
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this->init();
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FcPattern* pattern = FcPatternCreate();
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FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName);
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#if 0
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FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
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#endif
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FcConfigSubstitute(NULL, pattern, FcMatchPattern);
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FcDefaultSubstitute(pattern);
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const char* post_config_family = get_name(pattern, FC_FAMILY);
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FcResult result;
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FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result);
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if (!font_set) {
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FcPatternDestroy(pattern);
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return NULL;
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}
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int count;
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FcPattern** match = MatchFont(font_set, post_config_family, &count);
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if (!match) {
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FcPatternDestroy(pattern);
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FcFontSetDestroy(font_set);
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return NULL;
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}
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FcPatternDestroy(pattern);
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SkTDArray<FcPattern*> trimmedMatches;
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for (int i = 0; i < count; ++i) {
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const char* justName = find_just_name(get_name(match[i], FC_FILE));
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if (!is_lower(*justName)) {
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*trimmedMatches.append() = match[i];
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}
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#if 0
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printf("[%d:%d] %s %s [%d %d %d]\n", i, count,
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get_name(match[i], FC_STYLE), get_name(match[i], FC_FILE),
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get_int(match[i], FC_WEIGHT), get_int(match[i], FC_WIDTH),
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get_int(match[i], FC_SLANT));
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#endif
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}
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SkFontStyleSet_FC* sset = SkNEW_ARGS(SkFontStyleSet_FC,
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(trimmedMatches.begin(),
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trimmedMatches.count()));
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return sset;
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}
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virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
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const SkFontStyle&) { return NULL; }
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virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
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const SkFontStyle&) { return NULL; }
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virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) { return NULL; }
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virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) {
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return NULL;
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}
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virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) {
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return NULL;
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}
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};
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SkFontMgr* SkFontMgr::Factory() {
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SkFontConfigInterface* fci = RefFCI();
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return fci ? SkNEW_ARGS(SkFontMgr_fontconfig, (fci)) : NULL;
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}
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