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//usr/share/doc/freetype-devel-2.3.11/reference/ft2-bitmap_handling.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>FreeType-2.3.11 API Reference</title> <style type="text/css"> body { font-family: Verdana, Geneva, Arial, Helvetica, serif; color: #000000; background: #FFFFFF; } p { text-align: justify; } h1 { text-align: center; } li { text-align: justify; } td { padding: 0 0.5em 0 0.5em; } td.left { padding: 0 0.5em 0 0.5em; text-align: left; } a:link { color: #0000EF; } a:visited { color: #51188E; } a:hover { color: #FF0000; } span.keyword { font-family: monospace; text-align: left; white-space: pre; color: darkblue; } pre.colored { color: blue; } ul.empty { list-style-type: none; } </style> </head> <body> <table align=center><tr><td><font size=-1>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-1>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <center><h1>FreeType-2.3.11 API Reference</h1></center> <center><h1> Bitmap Handling </h1></center> <h2>Synopsis</h2> <table align=center cellspacing=5 cellpadding=0 border=0> <tr><td></td><td><a href="#FT_Bitmap_New">FT_Bitmap_New</a></td><td></td><td><a href="#FT_Bitmap_Embolden">FT_Bitmap_Embolden</a></td><td></td><td><a href="#FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a></td></tr> <tr><td></td><td><a href="#FT_Bitmap_Copy">FT_Bitmap_Copy</a></td><td></td><td><a href="#FT_Bitmap_Convert">FT_Bitmap_Convert</a></td><td></td><td><a href="#FT_Bitmap_Done">FT_Bitmap_Done</a></td></tr> </table><br><br> <table align=center width="87%"><tr><td> <p>This section contains functions for converting FT_Bitmap objects.</p> </td></tr></table><br> <table align=center width="75%"><tr><td> <h4><a name="FT_Bitmap_New">FT_Bitmap_New</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <span class="keyword">void</span> ) <b>FT_Bitmap_New</b>( <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *abitmap ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Initialize a pointer to an <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> structure.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>abitmap</b></td><td> <p>A pointer to the bitmap structure.</p> </td></tr> </table> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Bitmap_Copy">FT_Bitmap_Copy</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Bitmap_Copy</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *source, <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *target); </pre></table><br> <table align=center width="87%"><tr><td> <p>Copy a bitmap into another one.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>library</b></td><td> <p>A handle to a library object.</p> </td></tr> <tr valign=top><td><b>source</b></td><td> <p>A handle to the source bitmap.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>target</b></td><td> <p>A handle to the target bitmap.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Bitmap_Embolden">FT_Bitmap_Embolden</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Bitmap_Embolden</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a>* bitmap, <a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> xStrength, <a href="ft2-basic_types.html#FT_Pos">FT_Pos</a> yStrength ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Embolden a bitmap. The new bitmap will be about ‘xStrength’ pixels wider and ‘yStrength’ pixels higher. The left and bottom borders are kept unchanged.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>library</b></td><td> <p>A handle to a library object.</p> </td></tr> <tr valign=top><td><b>xStrength</b></td><td> <p>How strong the glyph is emboldened horizontally. Expressed in 26.6 pixel format.</p> </td></tr> <tr valign=top><td><b>yStrength</b></td><td> <p>How strong the glyph is emboldened vertically. Expressed in 26.6 pixel format.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>inout</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>bitmap</b></td><td> <p>A handle to the target bitmap.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>The current implementation restricts ‘xStrength’ to be less than or equal to 8 if bitmap is of pixel_mode <a href="ft2-basic_types.html#FT_Pixel_Mode">FT_PIXEL_MODE_MONO</a>.</p> <p>If you want to embolden the bitmap owned by a <a href="ft2-base_interface.html#FT_GlyphSlotRec">FT_GlyphSlotRec</a>, you should call <a href="ft2-bitmap_handling.html#FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a> on the slot first.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Bitmap_Convert">FT_Bitmap_Convert</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Bitmap_Convert</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <span class="keyword">const</span> <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *source, <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *target, <a href="ft2-basic_types.html#FT_Int">FT_Int</a> alignment ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Convert a bitmap object with depth 1bpp, 2bpp, 4bpp, or 8bpp to a bitmap object with depth 8bpp, making the number of used bytes per line (a.k.a. the ‘pitch’) a multiple of ‘alignment’.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>library</b></td><td> <p>A handle to a library object.</p> </td></tr> <tr valign=top><td><b>source</b></td><td> <p>The source bitmap.</p> </td></tr> <tr valign=top><td><b>alignment</b></td><td> <p>The pitch of the bitmap is a multiple of this parameter. Common values are 1, 2, or 4.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>output</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>target</b></td><td> <p>The target bitmap.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>It is possible to call <a href="ft2-bitmap_handling.html#FT_Bitmap_Convert">FT_Bitmap_Convert</a> multiple times without calling <a href="ft2-bitmap_handling.html#FT_Bitmap_Done">FT_Bitmap_Done</a> (the memory is simply reallocated).</p> <p>Use <a href="ft2-bitmap_handling.html#FT_Bitmap_Done">FT_Bitmap_Done</a> to finally remove the bitmap object.</p> <p>The ‘library’ argument is taken to have access to FreeType's memory handling functions.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_GlyphSlot_Own_Bitmap">FT_GlyphSlot_Own_Bitmap</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_GlyphSlot_Own_Bitmap</b>( <a href="ft2-base_interface.html#FT_GlyphSlot">FT_GlyphSlot</a> slot ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Make sure that a glyph slot owns ‘slot->bitmap’.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>slot</b></td><td> <p>The glyph slot.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>This function is to be used in combination with <a href="ft2-bitmap_handling.html#FT_Bitmap_Embolden">FT_Bitmap_Embolden</a>.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> <table align=center width="75%"><tr><td> <h4><a name="FT_Bitmap_Done">FT_Bitmap_Done</a></h4> <table align=center width="87%"><tr><td> Defined in FT_BITMAP_H (freetype/ftbitmap.h). </td></tr></table><br> <table align=center width="87%"><tr bgcolor="#D6E8FF"><td><pre> FT_EXPORT( <a href="ft2-basic_types.html#FT_Error">FT_Error</a> ) <b>FT_Bitmap_Done</b>( <a href="ft2-base_interface.html#FT_Library">FT_Library</a> library, <a href="ft2-basic_types.html#FT_Bitmap">FT_Bitmap</a> *bitmap ); </pre></table><br> <table align=center width="87%"><tr><td> <p>Destroy a bitmap object created with <a href="ft2-bitmap_handling.html#FT_Bitmap_New">FT_Bitmap_New</a>.</p> </td></tr></table><br> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>input</b></em></td></tr><tr><td> <p></p> <table cellpadding=3 border=0> <tr valign=top><td><b>library</b></td><td> <p>A handle to a library object.</p> </td></tr> <tr valign=top><td><b>bitmap</b></td><td> <p>The bitmap object to be freed.</p> </td></tr> </table> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>return</b></em></td></tr><tr><td> <p>FreeType error code. 0 means success.</p> </td></tr></table> <table align=center width="87%" cellpadding=5><tr bgcolor="#EEEEFF"><td><em><b>note</b></em></td></tr><tr><td> <p>The ‘library’ argument is taken to have access to FreeType's memory handling functions.</p> </td></tr></table> </td></tr></table> <hr width="75%"> <table align=center width="75%"><tr><td><font size=-2>[<a href="ft2-index.html">Index</a>]</font></td> <td width="100%"></td> <td><font size=-2>[<a href="ft2-toc.html">TOC</a>]</font></td></tr></table> </body> </html>
