📄 pango-glyph-storage.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>Glyph Storage</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"><link rel="start" href="index.html" title="Pango Reference Manual"><link rel="up" href="pango.html" title="Basic Pango Interfaces"><link rel="prev" href="pango-Text-Processing.html" title="Rendering"><link rel="next" href="pango-Fonts.html" title="Fonts"><meta name="generator" content="GTK-Doc V1.6 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="chapter" href="pango.html" title="Basic Pango Interfaces"><link rel="chapter" href="rendering.html" title="Rendering with Pango"><link rel="chapter" href="lowlevel.html" title="Low Level Functionality"><link rel="chapter" href="tools.html" title="Pango Tools"><link rel="index" href="ix01.html" title="Index"><link rel="index" href="ix02.html" title="Index of deprecated symbols"><link rel="index" href="ix03.html" title="Index of new symbols in 1.2"><link rel="index" href="ix04.html" title="Index of new symbols in 1.4"><link rel="index" href="ix05.html" title="Index of new symbols in 1.6"><link rel="index" href="ix06.html" title="Index of new symbols in 1.8"><link rel="index" href="ix07.html" title="Index of new symbols in 1.10"><link rel="index" href="ix08.html" title="Index of new symbols in 1.12"><link rel="index" href="ix09.html" title="Index of new symbols in 1.14"><link rel="index" href="ix10.html" title="Index of new symbols in 1.16"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="pango-Text-Processing.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="pango.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">Pango Reference Manual</th><td><a accesskey="n" href="pango-Fonts.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#top_of_page" class="shortcut">Top</a>  |  <a href="#desc" class="shortcut">Description</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="pango-Glyph-Storage"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><span class="refentrytitle"><a name="top_of_page"></a>Glyph Storage</span></h2><p>Glyph Storage — Structures for storing information about glyphs</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><a name="synopsis"></a><h2>Synopsis</h2><pre class="synopsis">#define <a href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS">PANGO_SCALE</a>#define <a href="pango-Glyph-Storage.html#PANGO-PIXELS:CAPS">PANGO_PIXELS</a> (d)#define <a href="pango-Glyph-Storage.html#PANGO-PIXELS-FLOOR:CAPS">PANGO_PIXELS_FLOOR</a> (d)#define <a href="pango-Glyph-Storage.html#PANGO-PIXELS-CEIL:CAPS">PANGO_PIXELS_CEIL</a> (d)double <a href="pango-Glyph-Storage.html#pango-units-to-double">pango_units_to_double</a> (int i);int <a href="pango-Glyph-Storage.html#pango-units-from-double">pango_units_from_double</a> (double d); <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a>;#define <a href="pango-Glyph-Storage.html#PANGO-ASCENT:CAPS">PANGO_ASCENT</a> (rect)#define <a href="pango-Glyph-Storage.html#PANGO-DESCENT:CAPS">PANGO_DESCENT</a> (rect)#define <a href="pango-Glyph-Storage.html#PANGO-LBEARING:CAPS">PANGO_LBEARING</a> (rect)#define <a href="pango-Glyph-Storage.html#PANGO-RBEARING:CAPS">PANGO_RBEARING</a> (rect)void <a href="pango-Glyph-Storage.html#pango-extents-to-pixels">pango_extents_to_pixels</a> (<a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *ink_rect, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *logical_rect); <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a>;#define <a href="pango-Glyph-Storage.html#PANGO-TYPE-MATRIX:CAPS">PANGO_TYPE_MATRIX</a>#define <a href="pango-Glyph-Storage.html#PANGO-MATRIX-INIT:CAPS">PANGO_MATRIX_INIT</a><a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a>* <a href="pango-Glyph-Storage.html#pango-matrix-copy">pango_matrix_copy</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix);void <a href="pango-Glyph-Storage.html#pango-matrix-free">pango_matrix_free</a> (<a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix);void <a href="pango-Glyph-Storage.html#pango-matrix-translate">pango_matrix_translate</a> (<a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, double tx, double ty);void <a href="pango-Glyph-Storage.html#pango-matrix-scale">pango_matrix_scale</a> (<a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, double scale_x, double scale_y);void <a href="pango-Glyph-Storage.html#pango-matrix-rotate">pango_matrix_rotate</a> (<a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, double degrees);void <a href="pango-Glyph-Storage.html#pango-matrix-concat">pango_matrix_concat</a> (<a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *new_matrix);void <a href="pango-Glyph-Storage.html#pango-matrix-transform-point">pango_matrix_transform_point</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, double *x, double *y);void <a href="pango-Glyph-Storage.html#pango-matrix-transform-distance">pango_matrix_transform_distance</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, double *dx, double *dy);void <a href="pango-Glyph-Storage.html#pango-matrix-transform-rectangle">pango_matrix_transform_rectangle</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *rect);void <a href="pango-Glyph-Storage.html#pango-matrix-transform-pixel-rectangle">pango_matrix_transform_pixel_rectangle</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *rect);double <a href="pango-Glyph-Storage.html#pango-matrix-get-font-scale-factor">pango_matrix_get_font_scale_factor</a> (const <a href="pango-Glyph-Storage.html#PangoMatrix">PangoMatrix</a> *matrix);typedef <a href="pango-Glyph-Storage.html#PangoGlyph">PangoGlyph</a>;#define <a href="pango-Glyph-Storage.html#PANGO-GLYPH-EMPTY:CAPS">PANGO_GLYPH_EMPTY</a>#define <a href="pango-Glyph-Storage.html#PANGO-GLYPH-UNKNOWN-FLAG:CAPS">PANGO_GLYPH_UNKNOWN_FLAG</a>#define <a href="pango-Glyph-Storage.html#PANGO-GET-UNKNOWN-GLYPH:CAPS">PANGO_GET_UNKNOWN_GLYPH</a> (wc) <a href="pango-Glyph-Storage.html#PangoGlyphInfo">PangoGlyphInfo</a>; <a href="pango-Glyph-Storage.html#PangoGlyphGeometry">PangoGlyphGeometry</a>;typedef <a href="pango-Glyph-Storage.html#PangoGlyphUnit">PangoGlyphUnit</a>; <a href="pango-Glyph-Storage.html#PangoGlyphVisAttr">PangoGlyphVisAttr</a>; <a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a>; <a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a>;#define <a href="pango-Glyph-Storage.html#PANGO-TYPE-GLYPH-STRING:CAPS">PANGO_TYPE_GLYPH_STRING</a><a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a>* <a href="pango-Glyph-Storage.html#pango-glyph-string-new">pango_glyph_string_new</a> (void);<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a>* <a href="pango-Glyph-Storage.html#pango-glyph-string-copy">pango_glyph_string_copy</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *string);void <a href="pango-Glyph-Storage.html#pango-glyph-string-set-size">pango_glyph_string_set_size</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *string, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> new_len);void <a href="pango-Glyph-Storage.html#pango-glyph-string-free">pango_glyph_string_free</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *string);void <a href="pango-Glyph-Storage.html#pango-glyph-string-extents">pango_glyph_string_extents</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs, <a href="pango-Fonts.html#PangoFont">PangoFont</a> *font, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *ink_rect, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *logical_rect);void <a href="pango-Glyph-Storage.html#pango-glyph-string-extents-range">pango_glyph_string_extents_range</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs, int start, int end, <a href="pango-Fonts.html#PangoFont">PangoFont</a> *font, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *ink_rect, <a href="pango-Glyph-Storage.html#PangoRectangle">PangoRectangle</a> *logical_rect);int <a href="pango-Glyph-Storage.html#pango-glyph-string-get-width">pango_glyph_string_get_width</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs);void <a href="pango-Glyph-Storage.html#pango-glyph-string-index-to-x">pango_glyph_string_index_to_x</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs, char *text, int length, <a href="pango-Text-Processing.html#PangoAnalysis">PangoAnalysis</a> *analysis, int index_, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> trailing, int *x_pos);void <a href="pango-Glyph-Storage.html#pango-glyph-string-x-to-index">pango_glyph_string_x_to_index</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs, char *text, int length, <a href="pango-Text-Processing.html#PangoAnalysis">PangoAnalysis</a> *analysis, int x_pos, int *index_, int *trailing);void <a href="pango-Glyph-Storage.html#pango-glyph-string-get-logical-widths">pango_glyph_string_get_logical_widths</a> (<a href="pango-Glyph-Storage.html#PangoGlyphString">PangoGlyphString</a> *glyphs, const char *text, int length, int embedding_level, int *logical_widths);<a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a>* <a href="pango-Glyph-Storage.html#pango-glyph-item-split">pango_glyph_item_split</a> (<a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a> *orig, const char *text, int split_index);<ahref="../glib/glib-Singly-Linked-Lists.html#GSList">GSList</a>* <a href="pango-Glyph-Storage.html#pango-glyph-item-apply-attrs">pango_glyph_item_apply_attrs</a> (<a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a> *glyph_item, const char *text, <a href="pango-Text-Attributes.html#PangoAttrList">PangoAttrList</a> *list);void <a href="pango-Glyph-Storage.html#pango-glyph-item-letter-space">pango_glyph_item_letter_space</a> (<a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a> *glyph_item, const char *text, <a href="pango-Text-Processing.html#PangoLogAttr">PangoLogAttr</a> *log_attrs, int letter_spacing);void <a href="pango-Glyph-Storage.html#pango-glyph-item-free">pango_glyph_item_free</a> (<a href="pango-Glyph-Storage.html#PangoGlyphItem">PangoGlyphItem</a> *glyph_item);</pre></div><div class="refsect1" lang="en"><a name="desc"></a><h2>Description</h2><p><a href="pango-Text-Processing.html#pango-shape"><code class="function">pango_shape()</code></a> produces a string of glyphs whichcan be measured or drawn to the screen. The followingstructures are used to store information aboutglyphs.</p></div><div class="refsect1" lang="en"><a name="details"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2770031"></a><h3><a name="PANGO-SCALE:CAPS"></a>PANGO_SCALE</h3><a class="indexterm" name="id2770042"></a><pre class="programlisting">#define PANGO_SCALE 1024</pre><p>The <a href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS"><code class="literal">PANGO_SCALE</code></a> macro represents the scale between dimensions usedfor Pango distances and device units. (The definition of deviceunits is dependent on the output device; it will typically be pixelsfor a screen, and points for a printer.) <a href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS"><code class="literal">PANGO_SCALE</code></a> is currently1024, but this may be changed in the future.</p><p>When setting font sizes, device units are always considered to bepoints (as in "12 point font"), rather than pixels. </p></div><hr><div class="refsect2" lang="en"><a name="id2770088"></a><h3><a name="PANGO-PIXELS:CAPS"></a>PANGO_PIXELS()</h3><a class="indexterm" name="id2770100"></a><pre class="programlisting">#define PANGO_PIXELS(d) (((int)(d) + 512) >> 10)</pre><p>Converts a dimension to device units by rounding.</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>d</code></em> :</span></td><td>a dimension in Pango units.</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2770136"></a><h3><a name="PANGO-PIXELS-FLOOR:CAPS"></a>PANGO_PIXELS_FLOOR()</h3><a class="indexterm" name="id2770149"></a><pre class="programlisting">#define PANGO_PIXELS_FLOOR(d) (((int)(d)) >> 10)</pre><p>Converts a dimension to device units by flooring.</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>d</code></em> :</span></td><td>a dimension in Pango units.</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2770185"></a><h3><a name="PANGO-PIXELS-CEIL:CAPS"></a>PANGO_PIXELS_CEIL()</h3><a class="indexterm" name="id2770198"></a><pre class="programlisting">#define PANGO_PIXELS_CEIL(d) (((int)(d) + 1023) >> 10)</pre><p>Converts a dimension to device units by ceiling.</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>d</code></em> :</span></td><td>a dimension in Pango units.</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2770234"></a><h3><a name="pango-units-to-double"></a>pango_units_to_double ()</h3><a class="indexterm" name="id2770249"></a><pre class="programlisting">double pango_units_to_double (int i);</pre><p>Converts a number in Pango units to floating-point: dividesit by <a href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS"><code class="literal">PANGO_SCALE</code></a>.</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>i</code></em> :</span></td><td> value in Pango units</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> the double value.</td></tr></tbody></table></div><p>Since 1.16</p></div><hr><div class="refsect2" lang="en"><a name="id2770324"></a><h3><a name="pango-units-from-double"></a>pango_units_from_double ()</h3><a class="indexterm" name="id2770340"></a><pre class="programlisting">int pango_units_from_double (double d);</pre><p>Converts a floating-point number to Pango units: multipliesit by <a href="pango-Glyph-Storage.html#PANGO-SCALE:CAPS"><code class="literal">PANGO_SCALE</code></a> and rounds to nearest integer.</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>d</code></em> :</span></td><td> double floating-point value</td>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -