Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(400)

Unified Diff: trunk/src/fonts/SkFontMgr_fontconfig.cpp

Issue 15077008: add separate impl file for SkFontMgr_fontconfig, so we don't polute (Closed) Base URL: http://skia.googlecode.com/svn/
Patch Set: Created 7 years, 7 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View side-by-side diff with in-line comments
Download patch
« no previous file with comments | « trunk/gyp/ports.gyp ('k') | trunk/src/ports/SkFontHost_fontconfig.cpp » ('j') | no next file with comments »
Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
Index: trunk/src/fonts/SkFontMgr_fontconfig.cpp
===================================================================
--- trunk/src/fonts/SkFontMgr_fontconfig.cpp (revision 0)
+++ trunk/src/fonts/SkFontMgr_fontconfig.cpp (revision 0)
@@ -0,0 +1,276 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkFontMgr.h"
+#include "SkFontStyle.h"
+#include "SkFontConfigInterface.h"
+#include "SkMath.h"
+#include "SkString.h"
+#include "SkTDArray.h"
+
+// for now we pull these in directly. eventually we will solely rely on the
+// SkFontConfigInterface instance.
+#include <fontconfig/fontconfig.h>
+#include <unistd.h>
+
+// borrow this global from SkFontHost_fontconfig. eventually that file should
+// go away, and be replaced with this one.
+extern SkFontConfigInterface* SkFontHost_fontconfig_ref_global();
+static SkFontConfigInterface* RefFCI() {
+ return SkFontHost_fontconfig_ref_global();
+}
+
+// look for the last substring after a '/' and return that, or return null.
+static const char* find_just_name(const char* str) {
+ const char* last = strrchr(str, '/');
+ return last ? last + 1 : NULL;
+}
+
+static bool is_lower(char c) {
+ return c >= 'a' && c <= 'z';
+}
+
+static int get_int(FcPattern* pattern, const char field[]) {
+ int value;
+ if (FcPatternGetInteger(pattern, field, 0, &value) != FcResultMatch) {
+ value = SK_MinS32;
+ }
+ return value;
+}
+
+static const char* get_name(FcPattern* pattern, const char field[]) {
+ const char* name;
+ if (FcPatternGetString(pattern, field, 0, (FcChar8**)&name) != FcResultMatch) {
+ name = "";
+ }
+ return name;
+}
+
+static bool valid_pattern(FcPattern* pattern) {
+ FcBool is_scalable;
+ if (FcPatternGetBool(pattern, FC_SCALABLE, 0, &is_scalable) != FcResultMatch || !is_scalable) {
+ return false;
+ }
+
+ // fontconfig can also return fonts which are unreadable
+ const char* c_filename = get_name(pattern, FC_FILE);
+ if (0 == *c_filename) {
+ return false;
+ }
+ if (access(c_filename, R_OK) != 0) {
+ return false;
+ }
+ return true;
+}
+
+static bool match_name(FcPattern* pattern, const char family_name[]) {
+ return !strcasecmp(family_name, get_name(pattern, FC_FAMILY));
+}
+
+static FcPattern** MatchFont(FcFontSet* font_set,
+ const char post_config_family[],
+ int* count) {
+ // Older versions of fontconfig have a bug where they cannot select
+ // only scalable fonts so we have to manually filter the results.
+
+ FcPattern** iter = font_set->fonts;
+ FcPattern** stop = iter + font_set->nfont;
+ // find the first good match
+ for (; iter < stop; ++iter) {
+ if (valid_pattern(*iter)) {
+ break;
+ }
+ }
+
+ if (iter == stop || !match_name(*iter, post_config_family)) {
+ return NULL;
+ }
+
+ FcPattern** firstIter = iter++;
+ for (; iter < stop; ++iter) {
+ if (!valid_pattern(*iter) || !match_name(*iter, post_config_family)) {
+ break;
+ }
+ }
+
+ *count = iter - firstIter;
+ return firstIter;
+}
+
+class SkFontStyleSet_FC : public SkFontStyleSet {
+public:
+ SkFontStyleSet_FC(FcPattern** matches, int count);
+ virtual ~SkFontStyleSet_FC();
+
+ virtual int count() SK_OVERRIDE { return fRecCount; }
+ virtual void getStyle(int index, SkFontStyle*, SkString* style) SK_OVERRIDE;
+ virtual SkTypeface* createTypeface(int index) SK_OVERRIDE;
+ virtual SkTypeface* matchStyle(const SkFontStyle& pattern) SK_OVERRIDE;
+
+private:
+ struct Rec {
+ SkString fStyleName;
+ SkString fFileName;
+ SkFontStyle fStyle;
+ };
+ Rec* fRecs;
+ int fRecCount;
+};
+
+static int map_range(int value,
+ int old_min, int old_max, int new_min, int new_max) {
+ SkASSERT(old_min < old_max);
+ SkASSERT(new_min < new_max);
+ return new_min + SkMulDiv(value - old_min,
+ new_max - new_min, old_max - old_min);
+}
+
+static SkFontStyle make_fontconfig_style(FcPattern* match) {
+ int weight = get_int(match, FC_WEIGHT);
+ int width = get_int(match, FC_WIDTH);
+ int slant = get_int(match, FC_SLANT);
+// SkDebugf("old weight %d new weight %d\n", weight, map_range(weight, 0, 80, 0, 400));
+
+ // fontconfig weight seems to be 0..200 or so, so we remap it here
+ weight = map_range(weight, 0, 80, 0, 400);
+ width = map_range(width, 0, 200, 0, 9);
+ return SkFontStyle(weight, width, slant > 0 ? SkFontStyle::kItalic_Slant
+ : SkFontStyle::kUpright_Slant);
+}
+
+SkFontStyleSet_FC::SkFontStyleSet_FC(FcPattern** matches, int count) {
+ fRecCount = count;
+ fRecs = SkNEW_ARRAY(Rec, count);
+ for (int i = 0; i < count; ++i) {
+ fRecs[i].fStyleName.set(get_name(matches[i], FC_STYLE));
+ fRecs[i].fFileName.set(get_name(matches[i], FC_FILE));
+ fRecs[i].fStyle = make_fontconfig_style(matches[i]);
+ }
+}
+
+SkFontStyleSet_FC::~SkFontStyleSet_FC() {
+ SkDELETE_ARRAY(fRecs);
+}
+
+void SkFontStyleSet_FC::getStyle(int index, SkFontStyle* style,
+ SkString* styleName) {
+ SkASSERT((unsigned)index < (unsigned)fRecCount);
+ if (style) {
+ *style = fRecs[index].fStyle;
+ }
+ if (styleName) {
+ *styleName = fRecs[index].fStyleName;
+ }
+}
+
+SkTypeface* SkFontStyleSet_FC::createTypeface(int index) {
+ return NULL;
+}
+
+SkTypeface* SkFontStyleSet_FC::matchStyle(const SkFontStyle& pattern) {
+ return NULL;
+}
+
+class SkFontMgr_fontconfig : public SkFontMgr {
+ SkAutoTUnref<SkFontConfigInterface> fFCI;
+ SkDataTable* fFamilyNames;
+
+ void init() {
+ if (!fFamilyNames) {
+ fFamilyNames = fFCI->getFamilyNames();
+ }
+ }
+
+public:
+ SkFontMgr_fontconfig(SkFontConfigInterface* fci)
+ : fFCI(fci)
+ , fFamilyNames(NULL) {}
+
+ virtual ~SkFontMgr_fontconfig() {
+ SkSafeUnref(fFamilyNames);
+ }
+
+protected:
+ virtual int onCountFamilies() {
+ this->init();
+ return fFamilyNames->count();
+ }
+
+ virtual void onGetFamilyName(int index, SkString* familyName) {
+ this->init();
+ familyName->set(fFamilyNames->atStr(index));
+ }
+
+ virtual SkFontStyleSet* onCreateStyleSet(int index) {
+ this->init();
+ return this->onMatchFamily(fFamilyNames->atStr(index));
+ }
+
+ virtual SkFontStyleSet* onMatchFamily(const char familyName[]) {
+ this->init();
+
+ FcPattern* pattern = FcPatternCreate();
+
+ FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName);
+#if 0
+ FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
+#endif
+ FcConfigSubstitute(NULL, pattern, FcMatchPattern);
+ FcDefaultSubstitute(pattern);
+
+ const char* post_config_family = get_name(pattern, FC_FAMILY);
+
+ FcResult result;
+ FcFontSet* font_set = FcFontSort(0, pattern, 0, 0, &result);
+ if (!font_set) {
+ FcPatternDestroy(pattern);
+ return NULL;
+ }
+
+ int count;
+ FcPattern** match = MatchFont(font_set, post_config_family, &count);
+ if (!match) {
+ FcPatternDestroy(pattern);
+ FcFontSetDestroy(font_set);
+ return NULL;
+ }
+
+ FcPatternDestroy(pattern);
+
+ SkTDArray<FcPattern*> trimmedMatches;
+ for (int i = 0; i < count; ++i) {
+ const char* justName = find_just_name(get_name(match[i], FC_FILE));
+ if (!is_lower(*justName)) {
+ *trimmedMatches.append() = match[i];
+ }
+ }
+
+ SkFontStyleSet_FC* sset = SkNEW_ARGS(SkFontStyleSet_FC,
+ (trimmedMatches.begin(),
+ trimmedMatches.count()));
+ return sset;
+ }
+
+ virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
+ const SkFontStyle&) { return NULL; }
+ virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
+ const SkFontStyle&) { return NULL; }
+
+ virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) { return NULL; }
+ virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) {
+ return NULL;
+ }
+ virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) {
+ return NULL;
+ }
+};
+
+SkFontMgr* SkFontMgr::Factory() {
+ SkFontConfigInterface* fci = RefFCI();
+ return fci ? SkNEW_ARGS(SkFontMgr_fontconfig, (fci)) : NULL;
+}
+
« no previous file with comments | « trunk/gyp/ports.gyp ('k') | trunk/src/ports/SkFontHost_fontconfig.cpp » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698