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[PERFORMANCE] Improve FileSystemFontProvider.scanFonts() performance …
…by adding 'only headers' mode to TTF parser:
* only read tables needed for FSFontInfo ('name', 'head', 'OS/2', 'CFF ', 'gcid')
* 'CFF ' and 'head' table parsers finish as soon as it has all needed headers- Loading branch information
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154 changes: 154 additions & 0 deletions
154
fontbox/src/main/java/org/apache/fontbox/ttf/FontHeaders.java
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|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package org.apache.fontbox.ttf; | ||
|
|
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| import java.io.IOException; | ||
|
|
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| /** | ||
| * To improve performance of {@code FileSystemFontProvider.scanFonts(...)}, | ||
| * this class is used both as a marker (to skip unused data) and as a storage for collected data. | ||
| * <p> | ||
| * Tables it needs:<ul> | ||
| * <li>NamingTable.TAG | ||
| * <li>HeaderTable.TAG | ||
| * <li>OS2WindowsMetricsTable.TAG | ||
| * <li>CFFTable.TAG (for OTF) | ||
| * <li>"gcid" (for non-OTF) | ||
| * </ul> | ||
| * | ||
| * @author Mykola Bohdiuk | ||
| */ | ||
| public final class FontHeaders | ||
| { | ||
| static final int BYTES_GCID = 142; | ||
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| private IOException exception; | ||
| private String name; | ||
| private Integer headerMacStyle; | ||
| private OS2WindowsMetricsTable os2Windows; | ||
| private String fontFamily; | ||
| private String fontSubFamily; | ||
| private byte[] nonOtfGcid142; | ||
| // | ||
| private boolean isOTFAndPostScript; | ||
| private String otfRegistry; | ||
| private String otfOrdering; | ||
| private int otfSupplement; | ||
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| public IOException getException() | ||
| { | ||
| return exception; | ||
| } | ||
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| public String getName() | ||
| { | ||
| return name; | ||
| } | ||
|
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| /** | ||
| * null == no HeaderTable, {@code ttf.getHeader().getMacStyle()} | ||
| */ | ||
| public Integer getHeaderMacStyle() | ||
| { | ||
| return headerMacStyle; | ||
| } | ||
|
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| public OS2WindowsMetricsTable getOS2Windows() | ||
| { | ||
| return os2Windows; | ||
| } | ||
|
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| // only when LOGGER(FileSystemFontProvider).isTraceEnabled() tracing: FontFamily, FontSubfamily | ||
| public String getFontFamily() | ||
| { | ||
| return fontFamily; | ||
| } | ||
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| public String getFontSubFamily() | ||
| { | ||
| return fontSubFamily; | ||
| } | ||
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| public boolean isOpenTypePostScript() | ||
| { | ||
| return isOTFAndPostScript; | ||
| } | ||
|
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| public byte[] getNonOtfTableGCID142() | ||
| { | ||
| return nonOtfGcid142; | ||
| } | ||
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| public String getOtfRegistry() | ||
| { | ||
| return otfRegistry; | ||
| } | ||
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| public String getOtfOrdering() | ||
| { | ||
| return otfOrdering; | ||
| } | ||
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| public int getOtfSupplement() | ||
| { | ||
| return otfSupplement; | ||
| } | ||
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| void setException(IOException exception) | ||
| { | ||
| this.exception = exception; | ||
| } | ||
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| void setName(String name) | ||
| { | ||
| this.name = name; | ||
| } | ||
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| void setHeaderMacStyle(Integer headerMacStyle) | ||
| { | ||
| this.headerMacStyle = headerMacStyle; | ||
| } | ||
|
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| void setOs2Windows(OS2WindowsMetricsTable os2Windows) | ||
| { | ||
| this.os2Windows = os2Windows; | ||
| } | ||
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| void setFontFamily(String fontFamily, String fontSubFamily) | ||
| { | ||
| this.fontFamily = fontFamily; | ||
| this.fontSubFamily = fontSubFamily; | ||
| } | ||
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| void setNonOtfGcid142(byte[] nonOtfGcid142) | ||
| { | ||
| this.nonOtfGcid142 = nonOtfGcid142; | ||
| } | ||
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| void setIsOTFAndPostScript(boolean isOTFAndPostScript) | ||
| { | ||
| this.isOTFAndPostScript = isOTFAndPostScript; | ||
| } | ||
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| // public because CFFParser is in a different package | ||
| public void setOtfROS(String otfRegistry, String otfOrdering, int otfSupplement) | ||
| { | ||
| this.otfRegistry = otfRegistry; | ||
| this.otfOrdering = otfOrdering; | ||
| this.otfSupplement = otfSupplement; | ||
| } | ||
| } |
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