/usr/include/compiz/opengl/shadercache.h is in compiz-dev 1:0.9.12.2+16.04.20160415-0ubuntu1.
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* Copyright © 2012 Linaro Ltd.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Linaro Ltd. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
* Linaro Ltd. makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* LINARO LTD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL LINARO LTD. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Authors: Alexandros Frantzis <alexandros.frantzis@linaro.org>
*/
#ifndef GL_SHADER_CACHE_H_
#define GL_SHADER_CACHE_H_
#include <string>
/**
* How to use a variable in a shader.
*/
enum GLShaderVariableType
{
/** The variable is not used */
GLShaderVariableNone,
/** The variable value is held in a uniform */
GLShaderVariableUniform,
/** The variable value is held in a varying (from a vertex attribute) */
GLShaderVariableVarying,
};
/**
* Parameters that define a vertex-fragment shader pair.
*/
struct GLShaderParameters
{
/** Whether this shader supports opacity */
bool opacity;
/** Whether this shader supports brightness */
bool brightness;
/** Whether this shader supports saturation */
bool saturation;
/** Whether this shader supports color and how */
GLShaderVariableType color;
/** Whether this shader supports normals and how */
GLShaderVariableType normal;
/** The number of textures this shader uses */
int numTextures;
/** Gets a minimalistic string representation of the parameters */
std::string id() const;
/** Gets a unique hash value for this set of parameters */
int hash() const;
};
/**
* An object representing a named vertex-fragment shader pair.
*/
struct GLShaderData
{
GLShaderData(const std::string &name,
const std::string &vertexShader,
const std::string &fragmentShader);
std::string name;
std::string vertexShader;
std::string fragmentShader;
bool isCached;
};
class PrivateShaderCache;
/**
* A cache of vertex-fragment shader pairs (GLShaderData).
*/
class GLShaderCache
{
public:
GLShaderCache ();
~GLShaderCache ();
/**
* Gets the GLShaderData associated with the specified parameters.
*
* @param params the parameters to get the GLShaderData for.
*
* @return the GLShaderData
*/
const GLShaderData &getShaderData (const GLShaderParameters ¶ms);
private:
PrivateShaderCache *priv;
};
#endif
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