wg__painter_8cpp-source.html

一个小巧的嵌入式图形系统wGUI, 可以用VC编译

00223           <span class="keywordflow">switch</span> (<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>-&gt;format-&gt;BytesPerPixel)
00224           {
00225           <span class="keywordflow">case</span> 1: <span class="comment">// 8 bpp</span>
00226                PixelColor = *reinterpret_cast&lt;Uint8*&gt;(PixelOffset);
00227                <span class="keywordflow">break</span>;
00228           <span class="keywordflow">case</span> 2: <span class="comment">// 16 bpp</span>
00229                PixelColor = *reinterpret_cast&lt;Uint16*&gt;(PixelOffset);
00230                <span class="keywordflow">break</span>;
00231           <span class="keywordflow">case</span> 3: <span class="comment">// 24 bpp</span>
00232           {
00233                Uint8* pPixelDest = reinterpret_cast&lt;Uint8*&gt;(&amp;PixelColor);
00234                Uint8* pPixelSource = reinterpret_cast&lt;Uint8*&gt;(PixelOffset);
00235                *pPixelDest = *pPixelSource;
00236                *(++pPixelDest) = *(++pPixelSource);
00237                *(++pPixelDest) = *(++pPixelSource);
00238                <span class="keywordflow">break</span>;
00239           }
00240           <span class="keywordflow">case</span> 4: <span class="comment">// 32 bpp</span>
00241                PixelColor = *reinterpret_cast&lt;Uint32*&gt;(PixelOffset);
00242                <span class="keywordflow">break</span>;
00243           <span class="keywordflow">default</span>:
00244                <span class="keywordflow">throw</span>(<a class="code" href="classwGui_1_1Wg__Ex__SDL.html">Wg_Ex_SDL</a>(<span class="stringliteral">"CPainter::DrawPoint : Unrecognized BytesPerPixel."</span>));
00245                <span class="keywordflow">break</span>;
00246           }
00247      }
00248      <span class="keywordflow">return</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>(&amp;PixelColor, <a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>-&gt;format);
00249 }
00250 
00251 
<a name="l00252"></a><a class="code" href="classwGui_1_1CPainter.html#b0">00252</a> <span class="keywordtype">void</span> CPainter::LockSurface(<span class="keywordtype">void</span>)
00253 {
00254      <span class="keywordflow">if</span> (SDL_MUSTLOCK(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>))
00255      {
00256           <span class="keywordflow">if</span> (SDL_LockSurface(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>) &lt; 0)
00257           {
00258                SDL_Delay(10);
00259                <span class="keywordflow">if</span> (SDL_LockSurface(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>) &lt; 0)
00260                {
00261                     <span class="keywordflow">throw</span>(<a class="code" href="classwGui_1_1Wg__Ex__SDL.html">Wg_Ex_SDL</a>(<span class="stringliteral">"Unable to lock surface."</span>));
00262                }
00263           }
00264      }
00265 }
00266 
00267 
<a name="l00268"></a><a class="code" href="classwGui_1_1CPainter.html#b1">00268</a> <span class="keywordtype">void</span> CPainter::UnlockSurface(<span class="keywordtype">void</span>)
00269 {
00270      <span class="keywordflow">if</span> (SDL_MUSTLOCK(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>))
00271      {
00272           SDL_UnlockSurface(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>);
00273      }
00274 }
00275 
00276 
<a name="l00277"></a><a class="code" href="classwGui_1_1CPainter.html#b2">00277</a> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a> CPainter::MixColor(<span class="keyword">const</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>&amp; ColorBase, <span class="keyword">const</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>&amp; ColorAdd)
00278 {
00279      <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a> MixedColor(COLOR_TRANSPARENT);
00280      <span class="keywordflow">switch</span> (m_PaintMode)
00281      {
00282      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s0">PAINT_IGNORE</a>:
00283           MixedColor = ColorBase;
00284           <span class="keywordflow">break</span>;
00285      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s1">PAINT_REPLACE</a>:
00286           MixedColor = ColorAdd;
00287           <span class="keywordflow">break</span>;
00288      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s2">PAINT_NORMAL</a>:
00289           MixedColor = ColorBase + ColorAdd;
00290           <span class="keywordflow">break</span>;
00291      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s4">PAINT_AND</a>:
00292           MixedColor = ColorBase &amp; ColorAdd;
00293           <span class="keywordflow">break</span>;
00294      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s3">PAINT_OR</a>:
00295           MixedColor = ColorBase | ColorAdd;
00296           <span class="keywordflow">break</span>;
00297      <span class="keywordflow">case</span> <a class="code" href="classwGui_1_1CPainter.html#s6s5">PAINT_XOR</a>:
00298           MixedColor = ColorBase ^ ColorAdd;
00299           <span class="keywordflow">break</span>;
00300      }
00301 
00302      <span class="keywordflow">return</span> MixedColor;
00303 }
00304 
00305 
<a name="l00306"></a><a class="code" href="classwGui_1_1CPainter.html#a9">00306</a> <span class="keywordtype">void</span> CPainter::ReplaceColor(<span class="keyword">const</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>&amp; NewColor, <span class="keyword">const</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>&amp; OldColor)
00307 {
00308      <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = 0; y &lt; <a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>-&gt;h; ++y)
00309      {
00310           <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = 0; x &lt; <a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>-&gt;w; ++x)
00311           {
00312                <a class="code" href="classwGui_1_1CPoint.html">CPoint</a> point(x, y);
00313                <span class="keywordflow">if</span>(<a class="code" href="classwGui_1_1CPainter.html#a8">ReadPoint</a>(point) == OldColor)
00314                {
00315                     <a class="code" href="classwGui_1_1CPainter.html#a7">DrawPoint</a>(point, NewColor);
00316                }
00317           }
00318      }
00319 }
00320 
00321 
<a name="l00322"></a><a class="code" href="classwGui_1_1CPainter.html#a10">00322</a> <span class="keywordtype">void</span> CPainter::TransparentColor(<span class="keyword">const</span> <a class="code" href="classwGui_1_1CRGBColor.html">CRGBColor</a>&amp; TransparentColor)
00323 {
00324      SDL_SetColorKey(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>, SDL_SRCCOLORKEY, TransparentColor.<a class="code" href="classwGui_1_1CRGBColor.html#a2">SDLColor</a>(<a class="code" href="classwGui_1_1CPainter.html#n0">m_pSurface</a>-&gt;format));
00325 }
00326 
00327 }
00328 
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