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<h1 class="firstHeading">Documentation/Shader library</h1>
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<p><br />
Pixie comes with a library that allows you to query a compiled shader for its parameter. SDR lib exports the following two functions:
</p>
<pre>TSdrShader *sdrGet(const char *);
void sdrDelete(TSdrShader *);
</pre>
<p>The first function is used to get the shader info i.e.: <tt>sdrGet("matte.sdr")</tt>. The second function can be used to free the structure returned be <tt>sdrGet</tt>. The structure <tt>TSdrShader</tt> contains the shader and parameter information. See the source code for "sdrinfo" for example usage.
</p><p>The structure <tt>TSdrShader</tt> is defined as:
</p>
<pre>typedef struct TSdrParameter {
char *name; // Name of the parameter
ESdrType type; // Type of the parameter
ESdrContainer container; // Container class of the parameter
int numItems; // Number of items (the number of items if an array, 1 otherwise)
char *space; // The space that the default value is expressed in
UDefaultVal defaultValue; // The default value
struct TSdrParameter *next; // The next parameter
} TSdrParameter;
</pre>
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