wg__renderedstring_8cpp-source.html

一个小巧的嵌入式图形系统wGUI, 可以用VC编译

00105 
<a name="l00106"></a><a class="code" href="classwGui_1_1CRenderedString.html#a2">00106</a> <span class="keywordtype">void</span> CRenderedString::GetMetrics(<a class="code" href="classwGui_1_1CPoint.html">CPoint</a>* pBoundedDimensions, <a class="code" href="classwGui_1_1CPoint.html">CPoint</a>* pOriginOffset, std::vector&lt;CRect&gt;* pCharacterRects)<span class="keyword"> const</span>
00107 <span class="keyword"></span>{
00108      <span class="keywordflow">if</span> (! m_bCachedMetricsValid)
00109      {
00110           m_CachedCharacterRects.clear();
00111 
00112           <span class="keywordtype">int</span> iMinY = 0;
00113           <span class="keywordtype">int</span> iMaxY = 0;
00114           <span class="keywordtype">int</span> iLength = 0;
00115           <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i &lt; <a class="code" href="classwGui_1_1CRenderedString.html#n1">m_sString</a>.size(); ++i)
00116           {
00117                FT_Glyph_Metrics* pMetrics;
00118                <span class="keywordflow">if</span> (<a class="code" href="classwGui_1_1CRenderedString.html#n2">m_MaskChar</a> == <span class="charliteral">' '</span>)
00119                {
00120                     pMetrics = <a class="code" href="classwGui_1_1CRenderedString.html#n0">m_pFontEngine</a>-&gt;<a class="code" href="classwGui_1_1CFontEngine.html#a3">GetMetrics</a>(<a class="code" href="classwGui_1_1CRenderedString.html#n1">m_sString</a>[i]);
00121                }
00122                <span class="keywordflow">else</span>
00123                {
00124                     pMetrics = <a class="code" href="classwGui_1_1CRenderedString.html#n0">m_pFontEngine</a>-&gt;<a class="code" href="classwGui_1_1CFontEngine.html#a3">GetMetrics</a>(<a class="code" href="classwGui_1_1CRenderedString.html#n2">m_MaskChar</a>);
00125                }
00126 
00127                <span class="comment">//FT_Glyph_Metrics* pMetrics = m_pFontEngine-&gt;GetMetrics(m_sString[i]);</span>
00128                <span class="keywordflow">if</span> ((pMetrics-&gt;horiBearingY - pMetrics-&gt;height) &lt; iMinY)
00129                {
00130                     iMinY = pMetrics-&gt;horiBearingY - pMetrics-&gt;height;
00131                }
00132                <span class="keywordflow">if</span> (pMetrics-&gt;horiBearingY &gt; iMaxY)
00133                {
00134                     iMaxY = pMetrics-&gt;horiBearingY;
00135                }
00136                iLength += (pMetrics-&gt;horiAdvance);
00137                <span class="comment">// The top and bottom values of the rect are not actually in rect coordinates at this point, since iMaxY and iMinY are not yet know</span>
00138                m_CachedCharacterRects.push_back(
00139                     <a class="code" href="classwGui_1_1CRect.html">CRect</a>((iLength - pMetrics-&gt;horiAdvance) &gt;&gt; 6, pMetrics-&gt;horiBearingY &gt;&gt; 6, iLength &gt;&gt; 6, pMetrics-&gt;height &gt;&gt; 6));
00140           }
00141 
00142           iMinY = iMinY &gt;&gt; 6;
00143           iMaxY = iMaxY &gt;&gt; 6;
00144           iLength = iLength &gt;&gt; 6;
00145 
00146           <span class="comment">// now fix the top and bottom values of the rects</span>
00147           <span class="keywordflow">for</span>(std::vector&lt;CRect&gt;::iterator iter = m_CachedCharacterRects.begin(); iter != m_CachedCharacterRects.end(); ++iter)
00148           {
00149                iter-&gt;SetTop(iMaxY - iter-&gt;Top());
00150                iter-&gt;SetBottom(iter-&gt;Top() + iter-&gt;Bottom());
00151           }
00152 
00153           <span class="comment">// Tack an empty rect on the end</span>
00154           m_CachedCharacterRects.push_back(<a class="code" href="classwGui_1_1CRect.html">CRect</a>(iLength, iMaxY, iLength, iMinY));
00155 
00156           m_CachedBoundedDimensions = <a class="code" href="classwGui_1_1CPoint.html">CPoint</a>(iLength, iMaxY - iMinY);
00157 
00158           <span class="keywordflow">switch</span> (m_eHorzAlign)
00159           {
00160           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s8s5">HALIGN_CENTER</a>:
00161                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a4">SetX</a>(-iLength / 2);
00162                <span class="keywordflow">break</span>;
00163           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s8s6">HALIGN_RIGHT</a>:
00164                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a4">SetX</a>(-iLength);
00165                <span class="keywordflow">break</span>;
00166           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s8s4">HALIGN_LEFT</a>:
00167           <span class="keywordflow">default</span>:
00168                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a4">SetX</a>(0);
00169                <span class="keywordflow">break</span>;
00170           }
00171 
00172           <span class="keywordflow">switch</span> (m_eVertAlign)
00173           {
00174           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s7s2">VALIGN_TOP</a>:
00175                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a5">SetY</a>(0);
00176                <span class="keywordflow">break</span>;
00177           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s7s3">VALIGN_BOTTOM</a>:
00178                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a5">SetY</a>(iMinY - iMaxY);
00179                <span class="keywordflow">break</span>;
00180           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s7s1">VALIGN_CENTER</a>:
00181                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a5">SetY</a>((iMinY - iMaxY) / 2);
00182                <span class="keywordflow">break</span>;
00183           <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CRenderedString.html#s7s0">VALIGN_NORMAL</a>:
00184           <span class="keywordflow">default</span>:
00185                m_OriginOffset.<a class="code" href="classwGui_1_1CPoint.html#a5">SetY</a>(-iMaxY);
00186                <span class="keywordflow">break</span>;
00187           }
00188 
00189           m_bCachedMetricsValid = <span class="keyword">true</span>;
00190      }
00191 
00192      <span class="keywordflow">if</span> (pBoundedDimensions)
00193      {
00194           *pBoundedDimensions = m_CachedBoundedDimensions;
00195      }
00196 
00197      <span class="keywordflow">if</span> (pOriginOffset)
00198      {
00199           *pOriginOffset = m_OriginOffset;
00200      }
00201 
00202      <span class="keywordflow">if</span> (pCharacterRects)
00203      {
00204           *pCharacterRects = m_CachedCharacterRects;
00205      }
00206 }
00207 
00208 }
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