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<title>Graphics/Gloss/Internals/Interface/Window.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK hide #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-comment'>-- | The main display function.</span>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Window</span>
<a name="line-5"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>createWindow</span> <span class='hs-layout'>)</span>
<a name="line-6"></a><span class='hs-keyword'>where</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Color</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Color</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Backend</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Gloss</span><span class='hs-varop'>.</span><span class='hs-conid'>Internals</span><span class='hs-varop'>.</span><span class='hs-conid'>Interface</span><span class='hs-varop'>.</span><span class='hs-conid'>Debug</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>$=</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>Rendering</span><span class='hs-varop'>.</span><span class='hs-conid'>OpenGL</span><span class='hs-varop'>.</span><span class='hs-conid'>GL</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>GL</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>IORef</span> <span class='hs-layout'>(</span><span class='hs-varid'>newIORef</span><span class='hs-layout'>)</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-15"></a>
<a name="line-16"></a><a name="createWindow"></a><span class='hs-comment'>-- | Open a window and use the supplied callbacks to handle window events.</span>
<a name="line-17"></a><span class='hs-definition'>createWindow</span>
<a name="line-18"></a> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Backend</span> <span class='hs-varid'>a</span>
<a name="line-19"></a> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span>
<a name="line-20"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Display</span>
<a name="line-21"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Color</span> <span class='hs-comment'>-- ^ Color to use when clearing.</span>
<a name="line-22"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Callback</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ Callbacks to use</span>
<a name="line-23"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-definition'>createWindow</span>
<a name="line-26"></a> <span class='hs-varid'>backend</span>
<a name="line-27"></a> <span class='hs-varid'>display</span>
<a name="line-28"></a> <span class='hs-varid'>clearColor</span>
<a name="line-29"></a> <span class='hs-varid'>callbacks</span>
<a name="line-30"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-31"></a> <span class='hs-comment'>-- Turn this on to spew debugging info to stdout</span>
<a name="line-32"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>debug</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-33"></a>
<a name="line-34"></a> <span class='hs-comment'>-- Initialize backend state</span>
<a name="line-35"></a> <span class='hs-varid'>backendStateRef</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newIORef</span> <span class='hs-varid'>backend</span>
<a name="line-36"></a>
<a name="line-37"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>debug</span>
<a name="line-38"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>putStr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"* displayInWindow\n"</span>
<a name="line-39"></a>
<a name="line-40"></a> <span class='hs-comment'>-- Intialize backend</span>
<a name="line-41"></a> <span class='hs-varid'>initializeBackend</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>debug</span>
<a name="line-42"></a>
<a name="line-43"></a> <span class='hs-comment'>-- Here we go!</span>
<a name="line-44"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>debug</span>
<a name="line-45"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>putStr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"* c window\n\n"</span>
<a name="line-46"></a>
<a name="line-47"></a> <span class='hs-comment'>-- Open window</span>
<a name="line-48"></a> <span class='hs-varid'>openWindow</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>display</span>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-comment'>-- Setup callbacks</span>
<a name="line-51"></a> <span class='hs-varid'>installDisplayCallback</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>callbacks</span>
<a name="line-52"></a> <span class='hs-varid'>installWindowCloseCallback</span> <span class='hs-varid'>backendStateRef</span>
<a name="line-53"></a> <span class='hs-varid'>installReshapeCallback</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>callbacks</span>
<a name="line-54"></a> <span class='hs-varid'>installKeyMouseCallback</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>callbacks</span>
<a name="line-55"></a> <span class='hs-varid'>installMotionCallback</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>callbacks</span>
<a name="line-56"></a> <span class='hs-varid'>installIdleCallback</span> <span class='hs-varid'>backendStateRef</span> <span class='hs-varid'>callbacks</span>
<a name="line-57"></a>
<a name="line-58"></a> <span class='hs-comment'>-- we don't need the depth buffer for 2d.</span>
<a name="line-59"></a> <span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-varid'>depthFunc</span> <span class='hs-varop'>$=</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-conid'>Always</span>
<a name="line-60"></a>
<a name="line-61"></a> <span class='hs-comment'>-- always clear the buffer to white</span>
<a name="line-62"></a> <span class='hs-conid'>GL</span><span class='hs-varop'>.</span><span class='hs-varid'>clearColor</span> <span class='hs-varop'>$=</span> <span class='hs-varid'>glColor4OfColor</span> <span class='hs-varid'>clearColor</span>
<a name="line-63"></a>
<a name="line-64"></a> <span class='hs-comment'>-- Dump some debugging info</span>
<a name="line-65"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>debug</span>
<a name="line-66"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>dumpBackendState</span> <span class='hs-varid'>backendStateRef</span>
<a name="line-67"></a> <span class='hs-varid'>dumpFramebufferState</span>
<a name="line-68"></a> <span class='hs-varid'>dumpFragmentState</span>
<a name="line-69"></a>
<a name="line-70"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>debug</span>
<a name="line-71"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>putStr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"* entering mainloop..\n"</span>
<a name="line-72"></a>
<a name="line-73"></a> <span class='hs-comment'>-- Start the main backend loop</span>
<a name="line-74"></a> <span class='hs-varid'>runMainLoop</span> <span class='hs-varid'>backendStateRef</span>
<a name="line-75"></a>
<a name="line-76"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>debug</span>
<a name="line-77"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>putStr</span> <span class='hs-varop'>$</span> <span class='hs-str'>"* all done\n"</span>
<a name="line-78"></a>
<a name="line-79"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
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