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<h1>RenderTarget.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// SFML - Simple and Fast Multimedia Library</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This software is provided 'as-is', without any express or implied warranty.</span>
<a name="l00007"></a>00007 <span class="comment">// In no event will the authors be held liable for any damages arising from the use of this software.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// Permission is granted to anyone to use this software for any purpose,</span>
<a name="l00010"></a>00010 <span class="comment">// including commercial applications, and to alter it and redistribute it freely,</span>
<a name="l00011"></a>00011 <span class="comment">// subject to the following restrictions:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// 1. The origin of this software must not be misrepresented;</span>
<a name="l00014"></a>00014 <span class="comment">// you must not claim that you wrote the original software.</span>
<a name="l00015"></a>00015 <span class="comment">// If you use this software in a product, an acknowledgment</span>
<a name="l00016"></a>00016 <span class="comment">// in the product documentation would be appreciated but is not required.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// 2. Altered source versions must be plainly marked as such,</span>
<a name="l00019"></a>00019 <span class="comment">// and must not be misrepresented as being the original software.</span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="comment">// 3. This notice may not be removed or altered from any source distribution.</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">// Headers</span>
<a name="l00028"></a>00028 <span class="comment"></span><span class="preprocessor">#include <SFML/Graphics/RenderTarget.hpp></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <SFML/Graphics/Drawable.hpp></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <SFML/Graphics/GraphicsContext.hpp></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <iostream></span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="keyword">namespace </span>sf
<a name="l00035"></a>00035 {
<a name="l00039"></a><a class="code" href="classsf_1_1RenderTarget.htm#2997c96cbd93cb8ce0aba2ddae35b86f">00039</a> <a class="code" href="classsf_1_1RenderTarget.htm#2997c96cbd93cb8ce0aba2ddae35b86f" title="Default constructor.">RenderTarget::RenderTarget</a>() :
<a name="l00040"></a>00040 myCurrentView (&myDefaultView),
<a name="l00041"></a>00041 myPreserveStates(false),
<a name="l00042"></a>00042 myIsDrawing (false)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044
<a name="l00045"></a>00045 }
<a name="l00046"></a>00046
<a name="l00047"></a>00047
<a name="l00051"></a><a class="code" href="classsf_1_1RenderTarget.htm#45414a2f09b257db7e7b37861d70c5a0">00051</a> <a class="code" href="classsf_1_1RenderTarget.htm#45414a2f09b257db7e7b37861d70c5a0" title="Destructor.">RenderTarget::~RenderTarget</a>()
<a name="l00052"></a>00052 {
<a name="l00053"></a>00053 <span class="comment">// Nothing to do</span>
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00060"></a><a class="code" href="classsf_1_1RenderTarget.htm#125645088d7b2df07599ea36fbb8b87e">00060</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1RenderTarget.htm#125645088d7b2df07599ea36fbb8b87e" title="Clear the entire target with a single color.">RenderTarget::Clear</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1Color.htm" title="Color is an utility class for manipulating 32-bits RGBA colors.">Color</a>& FillColor)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (Activate(<span class="keyword">true</span>))
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064 <span class="comment">// Clear the frame buffer</span>
<a name="l00065"></a>00065 GLCheck(glClearColor(FillColor.<a class="code" href="classsf_1_1Color.htm#6a5256ca24a4f9f0e0808f6fc23e01e1" title="Red component.">r</a> / 255.f, FillColor.<a class="code" href="classsf_1_1Color.htm#591daf9c3c55dea830c76c962d6ba1a5" title="Green component.">g</a> / 255.f, FillColor.<a class="code" href="classsf_1_1Color.htm#6707aedd0609c8920e12df5d7abc53cb" title="Blue component.">b</a> / 255.f, FillColor.<a class="code" href="classsf_1_1Color.htm#56dbdb47d5f040d9b78ac6a0b8b3a831" title="Alpha (transparency) component.">a</a> / 255.f));
<a name="l00066"></a>00066 GLCheck(glClear(GL_COLOR_BUFFER_BIT));
<a name="l00067"></a>00067
<a name="l00068"></a>00068 Activate(<span class="keyword">false</span>);
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072
<a name="l00076"></a><a class="code" href="classsf_1_1RenderTarget.htm#18678bb6afe22b7462e2cf08f701d2ff">00076</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1RenderTarget.htm#18678bb6afe22b7462e2cf08f701d2ff" title="Draw something into the target.">RenderTarget::Draw</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1Drawable.htm" title="Abstract base class for every object that can be drawn into a render window.">Drawable</a>& Object)
<a name="l00077"></a>00077 {
<a name="l00078"></a>00078 <span class="comment">// Check whether we are called from the outside or from a previous call to Draw</span>
<a name="l00079"></a>00079 <span class="keywordflow">if</span> (!myIsDrawing)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 myIsDrawing = <span class="keyword">true</span>;
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="comment">// Set our target as the current target for rendering</span>
<a name="l00084"></a>00084 <span class="keywordflow">if</span> (Activate(<span class="keyword">true</span>))
<a name="l00085"></a>00085 {
<a name="l00086"></a>00086 <span class="comment">// Save the current render states and set the SFML ones</span>
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (myPreserveStates)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 GLCheck(glPushAttrib(GL_COLOR_BUFFER_BIT | GL_CURRENT_BIT | GL_ENABLE_BIT |
<a name="l00090"></a>00090 GL_TEXTURE_BIT | GL_TRANSFORM_BIT | GL_VIEWPORT_BIT));
<a name="l00091"></a>00091 GLCheck(glMatrixMode(GL_MODELVIEW)); GLCheck(glPushMatrix());
<a name="l00092"></a>00092 GLCheck(glMatrixMode(GL_PROJECTION)); GLCheck(glPushMatrix());
<a name="l00093"></a>00093 SetRenderStates();
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="comment">// Set the window viewport and transform matrices</span>
<a name="l00097"></a>00097 GLCheck(glViewport(0, 0, <a class="code" href="classsf_1_1RenderTarget.htm#4df749ecfddb5355d8357afe719cf681" title="Get the width of the rendering region of the target.">GetWidth</a>(), <a class="code" href="classsf_1_1RenderTarget.htm#9495774c371e0dd9ad9835ad2f34a03a" title="Get the height of the rendering region of the target.">GetHeight</a>()));
<a name="l00098"></a>00098 GLCheck(glMatrixMode(GL_PROJECTION)); GLCheck(glLoadMatrixf(myCurrentView-><a class="code" href="classsf_1_1View.htm#98df64926582a286cad8600e432e4db1" title="Get the projection matrix of the view.">GetMatrix</a>().<a class="code" href="classsf_1_1Matrix3.htm#ff23cbd3d056d404a566a62dea4c98c1" title="Return the elements of the matrix as a 4x4, in an array of 16 floats.">Get4x4Elements</a>()));
<a name="l00099"></a>00099 GLCheck(glMatrixMode(GL_MODELVIEW)); GLCheck(glLoadIdentity());
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="comment">// Let the object draw itself</span>
<a name="l00102"></a>00102 Object.<a class="code" href="classsf_1_1Drawable.htm#849c20578156747914d17d25c2c62682" title="Draw the object into the specified window.">Draw</a>(*<span class="keyword">this</span>);
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="comment">// Restore render states</span>
<a name="l00105"></a>00105 <span class="keywordflow">if</span> (myPreserveStates)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 GLCheck(glMatrixMode(GL_PROJECTION)); GLCheck(glPopMatrix());
<a name="l00108"></a>00108 GLCheck(glMatrixMode(GL_MODELVIEW)); GLCheck(glPopMatrix());
<a name="l00109"></a>00109 GLCheck(glPopAttrib());
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">// Deactivate rendering on this target</span>
<a name="l00113"></a>00113 Activate(<span class="keyword">false</span>);
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 myIsDrawing = <span class="keyword">false</span>;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 <span class="keywordflow">else</span>
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="comment">// We are already called from a previous Draw : we don't need to set the states again, just draw the object</span>
<a name="l00121"></a>00121 Object.<a class="code" href="classsf_1_1Drawable.htm#849c20578156747914d17d25c2c62682" title="Draw the object into the specified window.">Draw</a>(*<span class="keyword">this</span>);
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a>00125
<a name="l00129"></a><a class="code" href="classsf_1_1RenderTarget.htm#7060ca19e685d8d5b7c6f5dd9b5906e1">00129</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1RenderTarget.htm#7060ca19e685d8d5b7c6f5dd9b5906e1" title="Change the current active view.">RenderTarget::SetView</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1View.htm" title="This class defines a view (position, size, etc.">View</a>& NewView)
<a name="l00130"></a>00130 {
<a name="l00131"></a>00131 myCurrentView = &NewView;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a>00134
<a name="l00138"></a><a class="code" href="classsf_1_1RenderTarget.htm#d426b7ba51cc6970fb828a2bef020274">00138</a> <span class="keyword">const</span> <a class="code" href="classsf_1_1View.htm" title="This class defines a view (position, size, etc.">View</a>& <a class="code" href="classsf_1_1RenderTarget.htm#d426b7ba51cc6970fb828a2bef020274" title="Get the current view.">RenderTarget::GetView</a>()<span class="keyword"> const</span>
<a name="l00139"></a>00139 <span class="keyword"></span>{
<a name="l00140"></a>00140 <span class="keywordflow">return</span> *myCurrentView;
<a name="l00141"></a>00141 }
<a name="l00142"></a>00142
<a name="l00143"></a>00143
<a name="l00147"></a><a class="code" href="classsf_1_1RenderTarget.htm#16db9179a7f035c59b8ecdd10cc2e699">00147</a> <a class="code" href="classsf_1_1View.htm" title="This class defines a view (position, size, etc.">View</a>& <a class="code" href="classsf_1_1RenderTarget.htm#16db9179a7f035c59b8ecdd10cc2e699" title="Get the default view of the window for read / write.">RenderTarget::GetDefaultView</a>()
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <span class="keywordflow">return</span> myDefaultView;
<a name="l00150"></a>00150 }
<a name="l00151"></a>00151
<a name="l00152"></a>00152
<a name="l00161"></a><a class="code" href="classsf_1_1RenderTarget.htm#b763d16f00166b516fead600d8824c71">00161</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1RenderTarget.htm#b763d16f00166b516fead600d8824c71" title="Tell SFML to preserve external OpenGL states, at the expense of more CPU charge.">RenderTarget::PreserveOpenGLStates</a>(<span class="keywordtype">bool</span> Preserve)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 myPreserveStates = Preserve;
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165
<a name="l00166"></a>00166
<a name="l00170"></a><a class="code" href="classsf_1_1RenderTarget.htm#3d9265548b6903ab7f645d12177bba24">00170</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1RenderTarget.htm#3d9265548b6903ab7f645d12177bba24" title="Called by the derived class when it&#39;s ready to be initialized.">RenderTarget::Initialize</a>()
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 <span class="comment">// Set the default rendering states</span>
<a name="l00173"></a>00173 SetRenderStates();
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="comment">// Setup the default view</span>
<a name="l00176"></a>00176 myDefaultView.<a class="code" href="classsf_1_1View.htm#a5c2ac8985a573632f9a1e95d56cc2ee" title="Rebuild the view from a rectangle.">SetFromRect</a>(<a class="code" href="classsf_1_1Rect.htm">FloatRect</a>(0, 0, static_cast<float>(<a class="code" href="classsf_1_1RenderTarget.htm#4df749ecfddb5355d8357afe719cf681" title="Get the width of the rendering region of the target.">GetWidth</a>()), static_cast<float>(<a class="code" href="classsf_1_1RenderTarget.htm#9495774c371e0dd9ad9835ad2f34a03a" title="Get the height of the rendering region of the target.">GetHeight</a>())));
<a name="l00177"></a>00177 <a class="code" href="classsf_1_1RenderTarget.htm#7060ca19e685d8d5b7c6f5dd9b5906e1" title="Change the current active view.">SetView</a>(myDefaultView);
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179
<a name="l00180"></a>00180
<a name="l00184"></a>00184 <span class="keywordtype">void</span> RenderTarget::SetRenderStates()
<a name="l00185"></a>00185 {
<a name="l00186"></a>00186 GLCheck(glDisable(GL_ALPHA_TEST));
<a name="l00187"></a>00187 GLCheck(glDisable(GL_DEPTH_TEST));
<a name="l00188"></a>00188 GLCheck(glDisable(GL_LIGHTING));
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190
<a name="l00191"></a>00191 } <span class="comment">// namespace sf</span>
</pre></div></div>
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