fbcompose - A compositing addon for fluxbox window manager.

 fbcompose(1) is an optional compositing addon for fluxbox window manager. It
 augments fluxbox with a number of graphical features. Most notably, fbcompose
 allows fluxbox to properly display applications that require compositing
 (docky, for example), adds support for true window transparency (as opposed to
 fluxbox's pseudo transparency) and provides a plugin framework to extend the
 compositor's functionality.

 As this is still a beta version of the compositor, the bugs are likely.

1 files changed, 227 insertions, 0 deletions

diff --git a/util/fbcompose/OpenGLShaders.hh b/util/fbcompose/OpenGLShaders.hh
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+++ b/util/fbcompose/OpenGLShaders.hh
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+/** OpenGLShaders.hh file for the fluxbox compositor. */
+
+// Copyright (c) 2011 Gediminas Liktaras (gliktaras at gmail dot com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+
+#ifndef FBCOMPOSITOR_OPENGLSHADERS_HH
+#define FBCOMPOSITOR_OPENGLSHADERS_HH
+
+
+#include "FbTk/Command.hh"
+#include "FbTk/RefCount.hh"
+
+#include <GL/glew.h>
+#include <GL/gl.h>
+
+#include <vector>
+
+
+namespace FbCompositor {
+
+    class BasePlugin;
+
+
+    //--- SHADER INITIALIZERS --------------------------------------------------
+
+    /** Rendering job initialization functor.  */
+    typedef FbTk::Command<void> OpenGLShaderInitializer;
+
+    /**
+     * Null initialization action.
+     */
+    class NullInitializer : public OpenGLShaderInitializer {
+    public :
+        virtual ~NullInitializer() { }
+        void execute() { }
+    };
+
+
+    //--- SHADER DEINITIALIZERS ------------------------------------------------
+
+    /** Rendering job cleanup functor. */
+    typedef FbTk::Command<void> OpenGLShaderDeinitializer;
+
+    /** 
+     * Null cleanup action.
+     */
+    class NullDeinitializer : public OpenGLShaderDeinitializer {
+    public :
+        virtual ~NullDeinitializer() { }
+        void execute() { }
+    };
+
+
+    //--- SHADER PROGRAM WRAPPER -----------------------------------------------
+
+    /**
+     * OpenGL shader program wrapper.
+     */
+    class OpenGLShaderProgram {
+    public :
+        //--- CONSTRUCTORS AND DESTRUCTORS -------------------------------------
+        
+        /** Constructor. */
+        OpenGLShaderProgram(const std::vector<BasePlugin*> &plugins);
+
+        /** Destructor. */
+        ~OpenGLShaderProgram();
+
+
+        //--- ACCESSORS --------------------------------------------------------
+
+        /** \returns handle to the shader program. */
+        GLuint programHandle() const;
+
+
+        /** \returns location of the given attribute. */
+        GLuint getAttributeLocation(const char *attrib_name);
+
+        /** \returns location of the fb_InitMainTexCoord attribute. */
+        GLuint mainTexCoordAttrib() const;
+
+        /** \returns location of the fb_InitPrimPos attribute. */
+        GLuint primPosAttrib() const;
+
+        /** \returns location of the fb_InitShapeTexCoord attribute. */
+        GLuint shapeTexCoordAttrib() const;
+
+
+        /** \returns location of the given uniform. */
+        GLuint getUniformLocation(const char *uniform_name);
+
+        /** \returns location of the fb_Alpha uniform. */
+        GLuint alphaUniform() const;
+        
+        /** \returns location of the fb_MainTexture uniform. */
+        GLuint mainTexUniform() const;
+
+        /** \returns location of the fb_ShapeTexture uniform. */
+        GLuint shapeTexUniform() const;
+
+
+        //--- SHADER MANIPULATION ----------------------------------------------
+
+        /** Uses the current shader program. */
+        void use();
+
+
+    private :
+        //--- INITIALIZATION FUNCTIONS -----------------------------------------
+
+        /** Creates a shader. */
+        GLuint createShader(GLenum shader_type, GLint source_length, const GLchar *source);
+
+        /** Creates a shader program. */
+        GLuint createShaderProgram(GLuint vertex_shader, GLuint fragment_shader);
+
+
+        //--- MAIN VARIABLES ---------------------------------------------------
+
+        /** The vertex shader. */
+        GLuint m_vertex_shader;
+
+        /** The fragment shader. */
+        GLuint m_fragment_shader;
+        
+        /** The shader program. */
+        GLuint m_shader_program;
+
+
+        /** Location of the fb_InitMainTexCoord attribute. */
+        GLuint m_main_tex_coord_attrib;
+
+        /** Location of the fb_InitPrimPos attribute. */
+        GLuint m_prim_pos_attrib;
+
+        /** Location of the fb_InitShapeTexCoord attribute. */
+        GLuint m_shape_tex_coord_attrib;
+
+
+        /** Location of the fb_Alpha uniform. */
+        GLuint m_alpha_uniform;
+        
+        /** Location of the fb_MainTexture uniform. */
+        GLuint m_main_tex_uniform;
+
+        /** Location of the fb_ShapeTexture uniform. */
+        GLuint m_shape_tex_uniform;
+    };
+
+
+    //--- INLINE FUNCTIONS -------------------------------------------------
+
+    // Returns location of the fb_Alpha uniform.
+    inline GLuint OpenGLShaderProgram::alphaUniform() const {
+        return m_alpha_uniform;
+    }
+
+    // Returns location of the given attribute.
+    inline GLuint OpenGLShaderProgram::getAttributeLocation(const char *attrib_name) {
+        return glGetAttribLocation(m_shader_program, attrib_name);
+    }
+
+    // Returns location of the given uniform.
+    inline GLuint OpenGLShaderProgram::getUniformLocation(const char *uniform_name) {
+        return glGetUniformLocation(m_shader_program, uniform_name);
+    }
+
+    // Returns location of the fb_InitMainTexCoord attribute.
+    inline GLuint OpenGLShaderProgram::mainTexCoordAttrib() const {
+        return m_main_tex_coord_attrib;
+    }
+
+    // Returns location of the fb_MainTexture uniform.
+    inline GLuint OpenGLShaderProgram::mainTexUniform() const {
+        return m_main_tex_uniform;
+    }
+
+    // Returns location of the fb_InitPrimPos attribute.
+    inline GLuint OpenGLShaderProgram::primPosAttrib() const {
+        return m_prim_pos_attrib;
+    }
+
+    // Returns the handle to the shader program.
+    inline GLuint OpenGLShaderProgram::programHandle() const {
+        return m_shader_program;
+    }
+
+    // Returns location of the fb_InitShapeTexCoord attribute.
+    inline GLuint OpenGLShaderProgram::shapeTexCoordAttrib() const {
+        return m_shape_tex_coord_attrib;
+    }
+
+    // Returns location of the fb_ShapeTexture uniform.
+    inline GLuint OpenGLShaderProgram::shapeTexUniform() const {
+        return m_shape_tex_uniform;
+    }
+
+    // Uses the current shader program.
+    inline void OpenGLShaderProgram::use() {
+        glUseProgram(m_shader_program);
+    }
+
+
+    //--- TYPEDEFS ---------------------------------------------------------
+
+    typedef FbTk::RefCount<OpenGLShaderProgram> OpenGLShaderProgramPtr;
+}
+
+#endif  // FBCOMPOSITOR_OPENGLSHADERS_HH