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<title>FTGL: FTTextureGlyph.cpp Source File</title>
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<h1>FTTextureGlyph.cpp</h1><a href="FTTextureGlyph_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <span class="preprocessor">#include    "<a class="code" href="FTTextureGlyph_8h.html">FTTextureGlyph.h</a>"</span>
00002 
00003 GLint FTTextureGlyph::activeTextureID = 0;
00004  
<a name="l00005"></a><a class="code" href="classFTTextureGlyph.html#a0">00005</a> <a class="code" href="classFTTextureGlyph.html#a0">FTTextureGlyph::FTTextureGlyph</a>( FT_GlyphSlot glyph, <span class="keywordtype">int</span> <span class="keywordtype">id</span>, <span class="keywordtype">int</span> xOffset, <span class="keywordtype">int</span> yOffset, GLsizei width, GLsizei height)
00006 :   <a class="code" href="classFTGlyph.html">FTGlyph</a>( glyph),
00007     destWidth(0),
00008     destHeight(0),
00009     glTextureID(id)
00010 {
00011     err = FT_Render_Glyph( glyph, <a class="code" href="FTGL_8h.html#a2">FT_RENDER_MODE_NORMAL</a>);
00012     <span class="keywordflow">if</span>( err || glyph-&gt;format != ft_glyph_format_bitmap)
00013     {
00014         <span class="keywordflow">return</span>;
00015     }
00016 
00017     FT_Bitmap      bitmap = glyph-&gt;bitmap;
00018 
00019     destWidth  = bitmap.width;
00020     destHeight = bitmap.rows;
00021     
00022     <span class="keywordflow">if</span>( destWidth &amp;&amp; destHeight)
00023     {
00024         glPushClientAttrib( GL_CLIENT_PIXEL_STORE_BIT);
00025         glPixelStorei( GL_UNPACK_LSB_FIRST, GL_FALSE);
00026         glPixelStorei( GL_UNPACK_ROW_LENGTH, 0);
00027         glPixelStorei( GL_UNPACK_ALIGNMENT, 1);
00028 
00029         glBindTexture( GL_TEXTURE_2D, glTextureID);
00030         glTexSubImage2D( GL_TEXTURE_2D, 0, xOffset, yOffset, destWidth, destHeight, GL_ALPHA, GL_UNSIGNED_BYTE, bitmap.buffer);
00031 
00032         glPopClientAttrib();
00033     }
00034 
00035 
00036 <span class="comment">//      0    </span>
00037 <span class="comment">//      +----+</span>
00038 <span class="comment">//      |    |</span>
00039 <span class="comment">//      |    |</span>
00040 <span class="comment">//      |    |</span>
00041 <span class="comment">//      +----+</span>
00042 <span class="comment">//           1</span>
00043     
00044     uv[0].<a class="code" href="classFTPoint.html#a7">X</a>( static_cast&lt;float&gt;(xOffset) / static_cast&lt;float&gt;(width));
00045     uv[0].<a class="code" href="classFTPoint.html#a8">Y</a>( static_cast&lt;float&gt;(yOffset) / static_cast&lt;float&gt;(height));
00046     uv[1].<a class="code" href="classFTPoint.html#a7">X</a>( static_cast&lt;float&gt;( xOffset + destWidth) / static_cast&lt;float&gt;(width));
00047     uv[1].<a class="code" href="classFTPoint.html#a8">Y</a>( static_cast&lt;float&gt;( yOffset + destHeight) / static_cast&lt;float&gt;(height));
00048     
00049     pos.<a class="code" href="classFTPoint.html#a7">X</a>( glyph-&gt;bitmap_left);
00050     pos.<a class="code" href="classFTPoint.html#a8">Y</a>( glyph-&gt;bitmap_top);
00051 }
00052 
00053 
<a name="l00054"></a><a class="code" href="classFTTextureGlyph.html#a1">00054</a> <a class="code" href="classFTTextureGlyph.html#a1">FTTextureGlyph::~FTTextureGlyph</a>()
00055 {}
00056 
00057 
<a name="l00058"></a><a class="code" href="classFTTextureGlyph.html#a2">00058</a> <span class="keyword">const</span> <a class="code" href="classFTPoint.html">FTPoint</a>&amp; <a class="code" href="classFTTextureGlyph.html#a2">FTTextureGlyph::Render</a>( <span class="keyword">const</span> <a class="code" href="classFTPoint.html">FTPoint</a>&amp; pen)
00059 {
00060     <span class="keywordflow">if</span>( activeTextureID != glTextureID)
00061     {
00062         glBindTexture( GL_TEXTURE_2D, (GLuint)glTextureID);
00063         activeTextureID = glTextureID;
00064     }
00065     
00066     glTranslatef( pen.<a class="code" href="classFTPoint.html#a7">X</a>(),  pen.<a class="code" href="classFTPoint.html#a8">Y</a>(), 0.0f);
00067 
00068     glBegin( GL_QUADS);
00069         glTexCoord2f( uv[0].X(), uv[0].Y());
00070         glVertex2f( pos.<a class="code" href="classFTPoint.html#a7">X</a>(), pos.<a class="code" href="classFTPoint.html#a8">Y</a>());
00071 
00072         glTexCoord2f( uv[0].X(), uv[1].Y());
00073         glVertex2f( pos.<a class="code" href="classFTPoint.html#a7">X</a>(), pos.<a class="code" href="classFTPoint.html#a8">Y</a>() - destHeight);
00074 
00075         glTexCoord2f( uv[1].X(), uv[1].Y());
00076         glVertex2f( destWidth + pos.<a class="code" href="classFTPoint.html#a7">X</a>(), pos.<a class="code" href="classFTPoint.html#a8">Y</a>() - destHeight);
00077         
00078         glTexCoord2f( uv[1].X(), uv[0].Y());
00079         glVertex2f( destWidth + pos.<a class="code" href="classFTPoint.html#a7">X</a>(), pos.<a class="code" href="classFTPoint.html#a8">Y</a>());
00080     glEnd();
00081 
00082     <span class="keywordflow">return</span> advance;
00083 }
00084 
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