author | Dominic Pinkman <dominic.pinkman@nokia.com> |
Fri, 11 Jun 2010 15:24:34 +0100 | |
changeset 9 | 59758314f811 |
parent 5 | f345bda72bc4 |
permissions | -rw-r--r-- |
9
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<?xml version="1.0" encoding="utf-8"?> |
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. --> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<!-- This component and the accompanying materials are made available under the terms of the License |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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"Eclipse Public License v1.0" which accompanies this distribution, |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". --> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<!-- Initial Contributors: |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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Nokia Corporation - initial contribution. |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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Contributors: |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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--> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<!DOCTYPE concept |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<concept id="GUID-F477E82D-2929-5C69-BF6D-A69A61AC9EA5" xml:lang="en"><title>Creating |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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a Font Rasterizer Plug-in</title><prolog><metadata><keywords/></metadata></prolog><conbody> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<section id="GUID-BE450962-C675-4974-81C3-ADA81B4328D2"><title>Overview</title> <p>The steps required to write a font rasterizer |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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DLL are: </p> <ul> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<li id="GUID-C0A88FBF-7D70-5EAC-8754-41AE322A80E0"><p>Implement an exported <codeph>NewL()</codeph> factory |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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function to create rasterizer objects (which you derive from <codeph>COpenFontRasterizer</codeph>). |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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You may choose to implement this as part of your rasterizer object. </p> </li> |
59758314f811
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<li id="GUID-1ED7EC05-4217-5FA5-AFBC-D25C1517343F"><p>Write a class derived |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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from <codeph>COpenFontRasterizer</codeph>. This will need to store any context |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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associated with the rasterization process rather than with individual typefaces. |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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It also implements a function to create your <codeph>COpenFontFile</codeph> derived |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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objects. </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<li id="GUID-7B5E3CCB-FD32-554F-9BBE-2784C98FEB4B"><p>Write a class derived |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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parents:
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from <codeph>COpenFontFile</codeph>. This class manages a single file representing |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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a typeface. </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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<li id="GUID-EA14EC9D-615D-5344-A91C-3171A51E3208"><p>Write a class derived |
59758314f811
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from <codeph>COpenFont</codeph>. </p> </li> |
59758314f811
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<li id="GUID-8D14151F-B779-5B31-B94D-F4FFA2D8F093"><p>Place all the code into |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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a DLL of the right type and provide an exported function to create the rasterizer |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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object. </p> </li> |
59758314f811
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</ul> <p>Deriving from <codeph>COpenFontRasterizer</codeph>, <codeph>COpenFontFile</codeph> and <codeph>COpenFont</codeph> are |
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discussed in the "See also" topics below. This section describes the operations |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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required to package the code as a polymorphic DLL. </p> <p>For more information, |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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see: </p> <ul> |
59758314f811
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<li id="GUID-13833E45-6481-5D93-847D-06F09BFA2717"><p> <xref href="GUID-1CF78E25-8C83-5812-AE6F-8612B3F9CDA9.dita">Deriving |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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from COpenFontRasterizer</xref> </p> </li> |
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<li id="GUID-6ED0A7A3-8DB8-556D-8B77-46DA7D448D6F"><p> <xref href="GUID-BCF6FEF0-1792-5DEA-A2D7-896E47163547.dita">Deriving |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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from COpenFontFile</xref> </p> </li> |
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<li id="GUID-94F5442E-9A77-53BB-B42E-316C62DCB032"><p> <xref href="GUID-5A89E3C4-DEE7-5823-A109-92ED0D87B58C.dita">Deriving |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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from COpenFont</xref> </p> </li> |
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<li id="GUID-027B74C4-6CE7-5D33-B00B-33016734189E"><p> <xref href="GUID-F44D974F-AADE-5E6C-8D69-8D3EEE4BD395.dita">Deriving |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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from COpenFontRasterizerContext</xref> </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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</ul> </section> |
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<section id="GUID-003BDA08-847C-4099-9C83-AF3E6559474C"><title>The DLL</title> <p>A font rasterizer DLL is an ordinary Symbian |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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polymorphic DLL. It exports just one function and has no unusual behavior. </p> <p>In |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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particular, it must have no writable static data. This is an important constraint |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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on the use of code from outside sources. See <xref href="GUID-5BDE6462-E6CA-5738-A587-C7D875574789.dita">Static |
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Data</xref> for more information. </p> </section> |
59758314f811
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<section id="GUID-ADA409CE-7326-5586-8DC4-B1E3FEBCE070"><title>The exported |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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function</title> <p>The exported function is a factory function that creates |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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objects of a class derived from <codeph>COpenFontRasterizer</codeph>. It will |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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be called just once — when the Font and Bitmap Server loads the DLL. </p> <p>Although |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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the name of the function does not matter because it is loaded by ordinal, |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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implementers should follow the practice of making it a static member of the |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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rasterizer class, called <codeph>NewL()</codeph>. Therefore, if the rasterizer |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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class is <codeph>CExampleRasterizer</codeph> (derived from <codeph>COpenFontRasterizer</codeph>), |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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the exported function is: </p> <codeblock id="GUID-45589D16-BF32-54F0-ADFB-566231281110" xml:space="preserve">static COpenFontRasterizer* CExampleRasterizer::NewL()</codeblock> <p>The function must take no arguments. It must create a <codeph>COpenFontRasterizer</codeph> derived |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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object on the heap, returning it to the caller. The caller is responsible |
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for deleting the object. As the name of the example function suggests, it |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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is allowed to leave. </p><p><b>Example </b> </p> <p>The exported function |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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used in the FreeType rasterizer is given below: </p> <codeblock id="GUID-1B22E569-A3DD-52B6-AEA2-F1CF8A721BAB" xml:space="preserve">EXPORT_C COpenFontRasterizer* CFreeTypeRasterizer::NewL() |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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{ |
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CFreeTypeRasterizer* r = new(ELeave) CFreeTypeRasterizer; |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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CleanupStack::PushL( r ); |
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r->iContext = CFreeTypeContext::NewL(); |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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CleanupStack::Pop(); |
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return r; |
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} |
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</codeblock> </section> |
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<section id="GUID-A76BDCFA-AE92-497C-9312-E77F9AB12957"><title>Project file</title> <p>The name of the rasterizer DLL, its |
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type, and its UIDs are all specified in the MMP file. Note that: </p> <ul> |
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<li id="GUID-AAD480A0-9010-5999-9677-9F7C1C94EC2F"><p>All capabilities except |
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TCB (Trusted Computing Base) are required. </p> </li> |
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<li id="GUID-38FDC5A5-5AA4-530C-AC34-D6BBE852959C"><p>The <i>targettype</i> must |
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be <b>PLUGIN </b>. </p> </li> |
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<li id="GUID-7EE45983-7578-527C-97A6-88ABFFA4EEBB"><p>The <i>UID</i> line |
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Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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identifies the project's UID2 and UID3 values. UID2 must be <codeph>0x10009D8D</codeph>, |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
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which identifies the DLL as an ECOM plug-in. UID3 must be <codeph>0x100012A7</codeph>, |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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which identifies the ECOM plug-in as a font rasterizer. </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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</ul> <p><b>Example </b> </p> <p>A fragment of the project file for the freetype |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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DLL is given below. </p> <codeblock id="GUID-1E2029EE-E2C8-5D48-B965-A8EBC991C513" xml:space="preserve">target freetype.dll |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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83 |
CAPABILITY All -Tcb |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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84 |
targettype PLUGIN |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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85 |
UID 0x10003B1F 0x100012A7</codeblock> </section> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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86 |
<section id="GUID-80B824DC-5C76-479D-B98E-05B4C985258E"><title>Header files</title> <p>Font rasterizer DLLs must <codeph>#include</codeph> the |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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following header files, which are located in the standard include directory <filepath>\epoc32\include\</filepath>: </p> <ul> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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88 |
<li id="GUID-29A10FF8-E5F4-5FF3-AAE9-5DB6769672B7"><p> <filepath>openfont.h</filepath> for |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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89 |
the Font Store classes </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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90 |
<li id="GUID-E85D522E-5EA4-5931-906B-1C9B190BE61E"><p> <filepath>e32uid.h</filepath> for |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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91 |
the UID value for a dynamic library </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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92 |
<li id="GUID-BB94D8BC-24B2-5BE3-8C46-9394FE3585A6"><p> <filepath>f32file.h</filepath> for |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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the file handling classes </p> </li> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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94 |
</ul> </section> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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95 |
</conbody><related-links> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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96 |
<link href="GUID-1CF78E25-8C83-5812-AE6F-8612B3F9CDA9.dita"><linktext>Deriving |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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97 |
from COpenFontRasterizer</linktext></link> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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98 |
<link href="GUID-BCF6FEF0-1792-5DEA-A2D7-896E47163547.dita"><linktext>Deriving |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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99 |
from COpenFontFile</linktext></link> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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100 |
<link href="GUID-5A89E3C4-DEE7-5823-A109-92ED0D87B58C.dita"><linktext>Deriving |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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101 |
from COpenFont</linktext></link> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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102 |
<link href="GUID-F44D974F-AADE-5E6C-8D69-8D3EEE4BD395.dita"><linktext>Deriving |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
parents:
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from COpenFontRasterizerContext</linktext></link> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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104 |
<link href="GUID-5BDE6462-E6CA-5738-A587-C7D875574789.dita"><linktext>Static data</linktext> |
59758314f811
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Dominic Pinkman <dominic.pinkman@nokia.com>
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105 |
</link> |
1
25a17d01db0c
Addition of the PDK content and example code for Documentation_content according to Feature bug 1607 and bug 1608
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</related-links></concept> |