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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
************************************************************************/
#include <config_lgpl.h>
#include <osl/diagnose.hxx>
#include "OGLTrans_Shaders.hxx"
#ifdef _WIN32
#elif defined(MACOSX)
#else // UNX == X11
#define GLX_GLXEXT_PROTOTYPES 1
#include <GL/glx.h>
#include <GL/glxext.h>
#endif
namespace
{
typedef void (*GLFunction_t)();
#ifdef _WIN32
GLFunction_t lcl_glGetProcAddress(const char *const name)
{
return wglGetProcAddress(name);
}
#elif defined(MACOSX)
GLFunction_t lcl_glGetProcAddress(const char *const name)
{
return 0;
}
#else // UNX == X11
GLFunction_t lcl_glGetProcAddress(const char *const name)
{
return glXGetProcAddress(reinterpret_cast<const GLubyte*>(name));
}
#endif
}
bool OGLShaders::cbInitialized = false;
#ifdef GL_VERSION_2_0
PFNGLACTIVETEXTUREPROC OGLShaders::glActiveTexture = NULL;
PFNGLCREATESHADERPROC OGLShaders::glCreateShader = NULL;
PFNGLSHADERSOURCEPROC OGLShaders::glShaderSource = NULL;
PFNGLCOMPILESHADERPROC OGLShaders::glCompileShader = NULL;
PFNGLGETSHADERIVPROC OGLShaders::glGetShaderiv = NULL;
PFNGLGETSHADERINFOLOGPROC OGLShaders::glGetShaderInfoLog = NULL;
PFNGLDELETESHADERPROC OGLShaders::glDeleteShader = NULL;
PFNGLCREATEPROGRAMPROC OGLShaders::glCreateProgram = NULL;
PFNGLATTACHSHADERPROC OGLShaders::glAttachShader = NULL;
PFNGLLINKPROGRAMPROC OGLShaders::glLinkProgram = NULL;
PFNGLGETPROGRAMIVPROC OGLShaders::glGetProgramiv = NULL;
PFNGLGETPROGRAMINFOLOGPROC OGLShaders::glGetProgramInfoLog = NULL;
PFNGLUSEPROGRAMPROC OGLShaders::glUseProgram = NULL;
PFNGLDELETEPROGRAMPROC OGLShaders::glDeleteProgram = NULL;
PFNGLGETUNIFORMLOCATIONPROC OGLShaders::glGetUniformLocation = NULL;
PFNGLUNIFORM1IPROC OGLShaders::glUniform1i = NULL;
PFNGLUNIFORM1FPROC OGLShaders::glUniform1f = NULL;
#endif
bool OGLShaders::Initialize()
{
#ifdef GL_VERSION_2_0
if( !cbInitialized ) {
glActiveTexture = (PFNGLACTIVETEXTUREPROC) lcl_glGetProcAddress( "glActiveTexture" );
glCreateShader = (PFNGLCREATESHADERPROC) lcl_glGetProcAddress( "glCreateShader" );
glShaderSource = (PFNGLSHADERSOURCEPROC) lcl_glGetProcAddress( "glShaderSource" );
glCompileShader = (PFNGLCOMPILESHADERPROC) lcl_glGetProcAddress( "glCompileShader" );
glGetShaderiv = (PFNGLGETSHADERIVPROC) lcl_glGetProcAddress( "glGetShaderiv" );
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC) lcl_glGetProcAddress( "glGetShaderInfoLog" );
glDeleteShader = (PFNGLDELETESHADERPROC) lcl_glGetProcAddress( "glDeleteShader" );
glCreateProgram = (PFNGLCREATEPROGRAMPROC) lcl_glGetProcAddress( "glCreateProgram" );
glAttachShader = (PFNGLATTACHSHADERPROC) lcl_glGetProcAddress( "glAttachShader" );
glLinkProgram = (PFNGLLINKPROGRAMPROC) lcl_glGetProcAddress( "glLinkProgram" );
glGetProgramiv = (PFNGLGETPROGRAMIVPROC) lcl_glGetProcAddress( "glGetProgramiv" );
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC) lcl_glGetProcAddress( "glGetProgramInfoLog" );
glUseProgram = (PFNGLUSEPROGRAMPROC) lcl_glGetProcAddress( "glUseProgram" );
glDeleteProgram = (PFNGLDELETEPROGRAMPROC) lcl_glGetProcAddress( "glDeleteProgram" );
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC) lcl_glGetProcAddress( "glGetUniformLocation" );
glUniform1i = (PFNGLUNIFORM1IPROC) lcl_glGetProcAddress( "glUniform1i" );
glUniform1f = (PFNGLUNIFORM1FPROC) lcl_glGetProcAddress( "glUniform1f" );
cbInitialized = true;
}
return glCreateShader != NULL;
#else
return false;
#endif
}
GLuint OGLShaders::LinkProgram( const char *vertexShader, const char *fragmentShader )
{
#ifdef GL_VERSION_2_0
if( !Initialize() )
return 0;
GLhandleARB vertexObject, fragmentObject, programObject;
GLint vertexCompiled, fragmentCompiled, programLinked;
char log[1024];
vertexObject = glCreateShader( GL_VERTEX_SHADER );
fragmentObject = glCreateShader( GL_FRAGMENT_SHADER );
SAL_INFO("slideshow.opengl", "checkpoint 1: shaders created (" << (glGetError() == GL_NO_ERROR) << ") vertex: " << vertexObject << " fragment: " << fragmentObject);
glShaderSource( vertexObject, 1, &vertexShader, NULL );
glShaderSource( fragmentObject, 1, &fragmentShader, NULL );
glCompileShader( vertexObject );
glGetShaderInfoLog( vertexObject, sizeof( log ), NULL, log );
SAL_INFO("slideshow.opengl", "vertex compile log: " << log);
glGetShaderiv( vertexObject, GL_COMPILE_STATUS, &vertexCompiled );
glCompileShader( fragmentObject );
glGetShaderInfoLog( fragmentObject, sizeof( log ), NULL, log );
SAL_INFO("slideshow.opengl", "fragment compile log: " << log);
glGetShaderiv( fragmentObject, GL_COMPILE_STATUS, &fragmentCompiled );
if( !vertexCompiled || !fragmentCompiled )
return 0;
SAL_INFO("slideshow.opengl", "checkpoint 2: shaders compiled (" << (glGetError() == GL_NO_ERROR) << ')');
programObject = glCreateProgram();
glAttachShader( programObject, vertexObject );
glAttachShader( programObject, fragmentObject );
glLinkProgram( programObject );
glGetProgramInfoLog( programObject, sizeof( log ), NULL, log );
SAL_INFO("slideshow.opengl", "program link log: " << log);
glGetProgramiv( programObject, GL_LINK_STATUS, &programLinked );
if( !programLinked )
return 0;
SAL_INFO("slideshow.opengl", "checkpoint 3: program linked (" << (glGetError() == GL_NO_ERROR) << ')');
return programObject;
#else
return 0;
#endif
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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