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Diffstat (limited to 'manuals/chickadee/Framebuffers.html')
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1 files changed, 49 insertions, 6 deletions
diff --git a/manuals/chickadee/Framebuffers.html b/manuals/chickadee/Framebuffers.html index c57a82a..d7bedc4 100644 --- a/manuals/chickadee/Framebuffers.html +++ b/manuals/chickadee/Framebuffers.html @@ -16,16 +16,16 @@ Foundation Web site at http://www.gnu.org/licenses/fdl.html. The document was typeset with http://www.texinfo.org/ (GNU Texinfo). --> -<!-- Created by GNU Texinfo 6.3, http://www.gnu.org/software/texinfo/ --> +<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ --> <head> -<title>The Chickadee Game Toolkit: Framebuffers</title> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<title>Framebuffers (The Chickadee Game Toolkit)</title> -<meta name="description" content="The Chickadee Game Toolkit: Framebuffers"> -<meta name="keywords" content="The Chickadee Game Toolkit: Framebuffers"> +<meta name="description" content="Framebuffers (The Chickadee Game Toolkit)"> +<meta name="keywords" content="Framebuffers (The Chickadee Game Toolkit)"> <meta name="resource-type" content="document"> <meta name="distribution" content="global"> <meta name="Generator" content="makeinfo"> -<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <link href="index.html#Top" rel="start" title="Top"> <link href="Index.html#Index" rel="index" title="Index"> <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> @@ -94,7 +94,50 @@ Next: <a href="Viewports.html#Viewports" accesskey="n" rel="next">Viewports</a>, </div> <hr> <a name="Framebuffers-1"></a> -<h4 class="subsection">2.4.9 Framebuffers</h4> +<h4 class="subsection">2.3.10 Framebuffers</h4> + +<p>A framebuffer is a chunk of memory that the GPU can render things +onto. By default, the framebuffer that is used for rendering is the +one belonging to the game window, but custom framebuffers can be used +as well. A common use-case for custom framebuffers is applying +post-processing effects: The entire scene is rendered to a +framebuffer, and then the contents of that framebuffer are applied to +a post-processing shader and rendered to the game window. The +post-processing shader could do any number of things: scaling, +antialiasing, motion blur, etc. +</p> +<dl> +<dt><a name="index-make_002dframebuffer"></a>Procedure: <strong>make-framebuffer</strong> <em><var>width</var> <var>height</var> [#:min-filter 'linear] [#:mag-filter 'linear] [#:wrap-s 'repeat] [#:wrap-t 'repeat]</em></dt> +<dd> +<p>Create a new framebuffer that is <var>width</var> pixels wide and <var>height</var> pixels high. +</p> +<p><var>min-filter</var> and <var>mag-filter</var> determine the scaling algorithm +applied to the framebuffer when rendering. By default, linear scaling +is used in both cases. To perform no smoothing at all, use +<code>nearest</code> for simple nearest neighbor scaling. This is typically +the best choice for pixel art games. +</p></dd></dl> + +<dl> +<dt><a name="index-framebuffer_003f"></a>Procedure: <strong>framebuffer?</strong> <em><var>obj</var></em></dt> +<dd><p>Return <code>#t</code> if <var>obj</var> is a framebuffer. +</p></dd></dl> + +<dl> +<dt><a name="index-framebuffer_002dtexture"></a>Procedure: <strong>framebuffer-texture</strong> <em><var>fb</var></em></dt> +<dd><p>Return the texture backing the framebuffer <var>fb</var>. +</p></dd></dl> + +<dl> +<dt><a name="index-framebuffer_002dviewport"></a>Procedure: <strong>framebuffer-viewport</strong> <em><var>fb</var></em></dt> +<dd><p>Return the default viewport (see <a href="Viewports.html#Viewports">Viewports</a>) used by the +framebuffer <var>fb</var>. +</p></dd></dl> + +<dl> +<dt><a name="index-null_002dframebuffer"></a>Procedure: <strong>null-framebuffer</strong></dt> +<dd><p>The default framebuffer. +</p></dd></dl> |