diff options
Diffstat (limited to 'slideshow/source/engine/OGLTrans/OGLTrans_Shaders.cxx')
-rw-r--r-- | slideshow/source/engine/OGLTrans/OGLTrans_Shaders.cxx | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/slideshow/source/engine/OGLTrans/OGLTrans_Shaders.cxx b/slideshow/source/engine/OGLTrans/OGLTrans_Shaders.cxx new file mode 100644 index 000000000000..8c47f2f730b3 --- /dev/null +++ b/slideshow/source/engine/OGLTrans/OGLTrans_Shaders.cxx @@ -0,0 +1,140 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * 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 +} + |