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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.
*
************************************************************************/
#include <osl/diagnose.hxx>
#include "OGLTrans_Shaders.hxx"
namespace unx
{
#include <GL/glx.h>
#include <GL/glxext.h>
}
bool OGLShaders::cbInitialized = false;
#ifdef GL_VERSION_2_0
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 ) {
glCreateShader = (PFNGLCREATESHADERPROC) unx::glXGetProcAddress( (unsigned char *) "glCreateShader" );
glShaderSource = (PFNGLSHADERSOURCEPROC) unx::glXGetProcAddress( (unsigned char *) "glShaderSource" );
glCompileShader = (PFNGLCOMPILESHADERPROC) unx::glXGetProcAddress( (unsigned char *) "glCompileShader" );
glGetShaderiv = (PFNGLGETSHADERIVPROC) unx::glXGetProcAddress( (unsigned char *) "glGetShaderiv" );
glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC) unx::glXGetProcAddress( (unsigned char *) "glGetShaderInfoLog" );
glDeleteShader = (PFNGLDELETESHADERPROC) unx::glXGetProcAddress( (unsigned char *) "glDeleteShader" );
glCreateProgram = (PFNGLCREATEPROGRAMPROC) unx::glXGetProcAddress( (unsigned char *) "glCreateProgram" );
glAttachShader = (PFNGLATTACHSHADERPROC) unx::glXGetProcAddress( (unsigned char *) "glAttachShader" );
glLinkProgram = (PFNGLLINKPROGRAMPROC) unx::glXGetProcAddress( (unsigned char *) "glLinkProgram" );
glGetProgramiv = (PFNGLGETPROGRAMIVPROC) unx::glXGetProcAddress( (unsigned char *) "glGetProgramiv" );
glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC) unx::glXGetProcAddress( (unsigned char *) "glGetProgramInfoLog" );
glUseProgram = (PFNGLUSEPROGRAMPROC) unx::glXGetProcAddress( (unsigned char *) "glUseProgram" );
glDeleteProgram = (PFNGLDELETEPROGRAMPROC) unx::glXGetProcAddress( (unsigned char *) "glDeleteProgram" );
glGetUniformLocation = (PFNGLGETUNIFORMLOCATIONPROC) unx::glXGetProcAddress( (unsigned char *) "glGetUniformLocation" );
glUniform1i = (PFNGLUNIFORM1IPROC) unx::glXGetProcAddress( (unsigned char *) "glUniform1i" );
glUniform1f = (PFNGLUNIFORM1FPROC) unx::glXGetProcAddress( (unsigned char *) "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 );
OSL_TRACE("checkpoint 1: shaders created (%d) vertex: %d fragment: %d", glGetError() == GL_NO_ERROR, vertexObject, fragmentObject );
glShaderSource( vertexObject, 1, &vertexShader, NULL );
glShaderSource( fragmentObject, 1, &fragmentShader, NULL );
glCompileShader( vertexObject );
glGetShaderInfoLog( vertexObject, sizeof( log ), NULL, log );
OSL_TRACE("vertex compile log: %s", log);
glGetShaderiv( vertexObject, GL_COMPILE_STATUS, &vertexCompiled );
glCompileShader( fragmentObject );
glGetShaderInfoLog( fragmentObject, sizeof( log ), NULL, log );
OSL_TRACE("fragment compile log: %s", log);
glGetShaderiv( fragmentObject, GL_COMPILE_STATUS, &fragmentCompiled );
if( !vertexCompiled || !fragmentCompiled )
return 0;
OSL_TRACE("checkpoint 2: shaders compiled (%d)", glGetError() == GL_NO_ERROR);
programObject = glCreateProgram();
glAttachShader( programObject, vertexObject );
glAttachShader( programObject, fragmentObject );
glLinkProgram( programObject );
glGetProgramInfoLog( programObject, sizeof( log ), NULL, log );
OSL_TRACE("program link log: %s", log);
glGetProgramiv( programObject, GL_LINK_STATUS, &programLinked );
if( !programLinked )
return 0;
OSL_TRACE("checkpoint 3: program linked (%d)", glGetError() == GL_NO_ERROR);
return programObject;
#else
return 0;
#endif
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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