{"id":4007,"date":"2015-11-25T16:08:07","date_gmt":"2015-11-25T16:08:07","guid":{"rendered":"http:\/\/anthroponaute.fr\/blog-informatique\/?p=4007"},"modified":"2015-12-07T08:03:23","modified_gmt":"2015-12-07T08:03:23","slug":"introduction-a-directx-10-activer-le-super-echantillonnage-partie-5","status":"publish","type":"post","link":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/?p=4007","title":{"rendered":"Introduction \u00e0 DirectX 10 – Activer le super \u00e9chantillonnage – partie 5"},"content":{"rendered":"

\"directx9c\"<\/a><\/p>\n

Intro :<\/strong><\/p>\n

Dans une application graphique, les objets du rendu peuvent subir ce qu’on appelle un \u00ab\u00a0cr\u00e9nelage<\/strong>\u00a0\u00bb ou un \u00ab\u00a0aliasing<\/strong>\u00a0\u00bb en anglais.<\/p>\n

Il appara\u00eet comme un escalier<\/em> autour de la ligne affich\u00e9e.<\/p>\n

La ligne du bas repr\u00e9sente la correction de l’effet d’escalier de la ligne du haut.<\/p>\n

\"cr\u00e9n\u00e9lage\"<\/a><\/p>\n

Pr\u00e9requis :<\/strong><\/p>\n

– Savoir initialiser DirectX 10.1<\/p>\n

Explications :<\/strong><\/p>\n

Cinqui\u00e8me partie :<\/strong><\/h2>\n

Par d\u00e9faut, DirectX 10.1 g\u00e8re un type d’anticr\u00e9nelage nomm\u00e9 Multisample anti-aliasing<\/strong> (MSAA<\/em>)<\/p>\n

1) L’anti-aliasing activ\u00e9<\/strong> :<\/p>\n

\"AA_on\"<\/a><\/p>\n

1) L’anti-aliasing d\u00e9sactiv\u00e9<\/strong> :<\/p>\n

\"AA_off\"<\/a><\/p>\n

 <\/p>\n

Comment activer le multi-sampling dans le code ?<\/span><\/p>\n

Lors de l’appel \u00e0 D3D10CreateDeviceAndSwapChain<\/em> il faut sp\u00e9cifier dans la structure DXGI_SWAP_CHAIN_DESC <\/em>:<\/p>\n

\r\nDXGI_SWAP_CHAIN_DESC sd;\r\nZeroMemory(&amp;sd, sizeof(sd));\r\nsd.BufferCount = 1;\r\nsd.BufferDesc.Width = m_iWidth;\r\nsd.BufferDesc.Height = m_iHeight;\r\nsd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;\r\nsd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;\r\nsd.BufferDesc.RefreshRate.Numerator = 0;\r\nsd.BufferDesc.RefreshRate.Denominator = 1;\r\nsd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;\r\nsd.OutputWindow = m_hWnd;\r\n\r\n\/\/----------------------------------\/\/\r\n\r\n\/* On indique le nombre d'\u00e9chantillons de l'anti-aliasing *\/\r\nsd.SampleDesc.Count = m_iFSAASampleCount;\r\n\/* On indique le niveau de qualit\u00e9 de l'anti-aliasing *\/\r\nsd.SampleDesc.Quality = 0;\r\n\r\n\/\/----------------------------------\/\/\r\n\r\n\/\/ Fen\u00eatr\u00e9 ou non\r\nsd.Windowed = !m_bFullscreen;\r\nsd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;\r\n<\/pre>\n
 <\/p>\n
\"warning_small\"<\/a><\/p>\n
Il reste deux \u00e9tapes \u00e0 ne pas oublier d’effectuer :<\/span><\/p>\n

\n1) Effectuer la m\u00eame configuration que pr\u00e9c\u00e9demment, lors la cr\u00e9ation de la texture du deph-stencil<\/strong> :<\/p>\n
Il faut sp\u00e9cifier la m\u00eame configuration que pr\u00e9c\u00e9demment, sinon cela ne fonctionnera pas !<\/p>\n
\r\nD3D10_TEXTURE2D_DESC descDepth;\r\nZeroMemory(&amp;descDepth, sizeof(descDepth));\r\ndescDepth.Width = m_iWidth;\r\ndescDepth.Height = m_iHeight;\r\ndescDepth.MipLevels = 1;\r\ndescDepth.ArraySize = 1;\r\ndescDepth.Format = DXGI_FORMAT_D32_FLOAT;\r\n\r\n\/\/----------------------------------\/\/\r\n\r\n\/* On indique le nombre d'\u00e9chantillons de l'anti-aliasing *\/\r\ndescDepth.SampleDesc.Count = m_iFSAASampleCount;\r\n\/* On indique le niveau de qualit\u00e9 de l'anti-aliasing *\/\r\ndescDepth.SampleDesc.Quality = 0;\r\n\r\n\/\/----------------------------------\/\/\r\n\r\ndescDepth.Usage = D3D10_USAGE_DEFAULT;\r\ndescDepth.BindFlags = D3D10_BIND_DEPTH_STENCIL;\r\ndescDepth.CPUAccessFlags = 0;\r\ndescDepth.MiscFlags = 0;\r\n\r\nm_pd3dDevice-&gt;CreateTexture2D(&amp;descDepth, nullptr, &amp;m_pDepthStencil);\r\n\r\n<\/pre>\n

\n2) Effectuer une certaine configuration lors la cr\u00e9ation de la DepthStencilView<\/strong> :<\/p>\n
\r\nD3D10_DEPTH_STENCIL_VIEW_DESC descDSV;\r\ndescDSV.Format = descDepth.Format;\r\n\r\nif (m_iFSAALevel &gt; 1)\r\n{\r\n     descDSV.ViewDimension = D3D10_DSV_DIMENSION_TEXTURE2DMS;\r\n}\r\nelse\r\n{\r\n     descDSV.ViewDimension = D3D10_DSV_DIMENSION_TEXTURE2D;\r\n}\r\n\r\ndescDSV.Texture2D.MipSlice = 0;\r\n\r\nm_pd3dDevice-&gt;CreateDepthStencilView(m_pDepthStencil, &amp;descDSV, &amp;m_pDepthStencilView);\r\n<\/pre>\n
 <\/p>\n
\n
 <\/p>\n
Voici une fonction qui permet d’afficher les capacit\u00e9s possibles de votre carte graphique en mati\u00e8re d’anti-aliasing.<\/p>\n
Il faut obtenir le nombre d’\u00e9chantillons m_iFSAASampleCount par ce bais :<\/p>\n
\r\nvoid PrintFSAACapabilities()\r\n{\r\n\u00a0\u00a0 \u00a0HRESULT hr = S_OK;\r\n\u00a0\u00a0 \u00a0UINT maxQualityLevel = 1;\r\n\r\n\u00a0\u00a0 \u00a0for (UINT iSampleCount = 1; iSampleCount &lt;= D3D10_MAX_MULTISAMPLE_SAMPLE_COUNT; iSampleCount++)\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0hr = m_pd3dDevice-&gt;CheckMultisampleQualityLevels(\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DXGI_FORMAT_R8G8B8A8_UNORM, iSampleCount, &amp;maxQualityLevel);\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (hr != S_OK)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0std::cout &lt;&lt; &quot;CheckMultisampleQualityLevels a \u00e9chouee.&quot; &lt;&lt; std::endl;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0if (maxQualityLevel &gt; 0)\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0std::cout &lt;&lt; &quot;MSAA &quot; &lt;&lt; iSampleCount &lt;&lt; (&quot;X supportee par la carte vid\u00e9o avec &quot;) &lt;&lt;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0maxQualityLevel &lt;&lt; &quot; niveau(x) de qualite.&quot; &lt;&lt; std::endl;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}\r\n\u00a0\u00a0 \u00a0}\r\n}\r\n<\/pre>\n
 <\/p>\n
R\u00e9sum\u00e9 :<\/strong><\/p>\n
Nous avons pr\u00e9sent\u00e9 comment proc\u00e9der pour afficher dans DirectX 10 les diff\u00e9rents niveaux d’anticr\u00e9n\u00e9lages possibles par la carte vid\u00e9o et comment les activer.<\/p>\n
R\u00e9f\u00e9rences :<\/strong><\/p>\n
– Windows DirectX Graphics Documentation (SDK June 2010)<\/p>\n","protected":false},"excerpt":{"rendered":"
Intro : Dans une application graphique, les objets du rendu peuvent subir ce qu’on appelle un \u00ab\u00a0cr\u00e9nelage\u00a0\u00bb ou un \u00ab\u00a0aliasing\u00a0\u00bb en anglais. Il appara\u00eet comme un escalier autour de la ligne affich\u00e9e. La ligne du bas repr\u00e9sente la correction de l’effet d’escalier de la ligne du haut. Pr\u00e9requis : – Savoir initialiser DirectX 10.1 Explications […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/4007"}],"collection":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4007"}],"version-history":[{"count":44,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/4007\/revisions"}],"predecessor-version":[{"id":4442,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=\/wp\/v2\/posts\/4007\/revisions\/4442"}],"wp:attachment":[{"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.la-porte-des-nebuleuses.net\/blog-informatique\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}