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kwin/libkwineffects/kwinglutils_funcs.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "kwinglutils.h"
#include <dlfcn.h>
// Resolves given function, using getProcAddress
#ifdef KWIN_HAVE_EGL
#define GL_RESOLVE( function ) \
if (platformInterface == GlxPlatformInterface) \
function = (function ## _func)getProcAddress( #function ); \
else if (platformInterface == EglPlatformInterface) \
function = (function ## _func)eglGetProcAddress( #function );
// Same as above but tries to use function "symbolName"
// Useful when functionality is defined in an extension with a different name
#define GL_RESOLVE_WITH_EXT( function, symbolName ) \
if (platformInterface == GlxPlatformInterface) { \
function = (function ## _func)getProcAddress( #symbolName ); \
} else if (platformInterface == EglPlatformInterface) { \
function = (function ## _func)eglGetProcAddress( #symbolName ); \
}
#else
// same without the switch to egl
#define GL_RESOLVE( function ) function = (function ## _func)getProcAddress( #function );
#define GL_RESOLVE_WITH_EXT( function, symbolName ) \
function = (function ## _func)getProcAddress( #symbolName );
#endif
#define EGL_RESOLVE( function ) function = (function ## _func)eglGetProcAddress( #function );
namespace KWin
{
#ifndef KWIN_HAVE_OPENGLES
// Function pointers
glXGetProcAddress_func glXGetProcAddress;
// GLX 1.3
glXQueryDrawable_func glXQueryDrawable;
// texture_from_pixmap extension functions
glXReleaseTexImageEXT_func glXReleaseTexImageEXT;
glXBindTexImageEXT_func glXBindTexImageEXT;
// glXCopySubBufferMESA
glXCopySubBuffer_func glXCopySubBuffer;
// video_sync extension functions
glXGetVideoSync_func glXGetVideoSync;
glXWaitVideoSync_func glXWaitVideoSync;
glXSwapInterval_func glXSwapInterval;
// glActiveTexture
glActiveTexture_func glActiveTexture;
// framebuffer_object extension functions
glIsRenderbuffer_func glIsRenderbuffer;
glBindRenderbuffer_func glBindRenderbuffer;
glDeleteRenderbuffers_func glDeleteRenderbuffers;
glGenRenderbuffers_func glGenRenderbuffers;
glRenderbufferStorage_func glRenderbufferStorage;
glGetRenderbufferParameteriv_func glGetRenderbufferParameteriv;
glIsFramebuffer_func glIsFramebuffer;
glBindFramebuffer_func glBindFramebuffer;
glDeleteFramebuffers_func glDeleteFramebuffers;
glGenFramebuffers_func glGenFramebuffers;
glCheckFramebufferStatus_func glCheckFramebufferStatus;
glFramebufferTexture1D_func glFramebufferTexture1D;
glFramebufferTexture2D_func glFramebufferTexture2D;
glFramebufferTexture3D_func glFramebufferTexture3D;
glFramebufferRenderbuffer_func glFramebufferRenderbuffer;
glGetFramebufferAttachmentParameteriv_func glGetFramebufferAttachmentParameteriv;
glGenerateMipmap_func glGenerateMipmap;
glBlitFramebuffer_func glBlitFramebuffer;
// Shader functions
glCreateShader_func glCreateShader;
glShaderSource_func glShaderSource;
glCompileShader_func glCompileShader;
glDeleteShader_func glDeleteShader;
glCreateProgram_func glCreateProgram;
glAttachShader_func glAttachShader;
glLinkProgram_func glLinkProgram;
glUseProgram_func glUseProgram;
glDeleteProgram_func glDeleteProgram;
glGetShaderInfoLog_func glGetShaderInfoLog;
glGetProgramInfoLog_func glGetProgramInfoLog;
glGetProgramiv_func glGetProgramiv;
glGetShaderiv_func glGetShaderiv;
glUniform1f_func glUniform1f;
glUniform2f_func glUniform2f;
glUniform3f_func glUniform3f;
glUniform4f_func glUniform4f;
glUniform1i_func glUniform1i;
glUniform1fv_func glUniform1fv;
glUniform2fv_func glUniform2fv;
glUniform3fv_func glUniform3fv;
glUniform4fv_func glUniform4fv;
glGetUniformfv_func glGetUniformfv;
glUniformMatrix4fv_func glUniformMatrix4fv;
glValidateProgram_func glValidateProgram;
glGetUniformLocation_func glGetUniformLocation;
glVertexAttrib1f_func glVertexAttrib1f;
glGetAttribLocation_func glGetAttribLocation;
glBindAttribLocation_func glBindAttribLocation;
glGenProgramsARB_func glGenProgramsARB;
glBindProgramARB_func glBindProgramARB;
glProgramStringARB_func glProgramStringARB;
glProgramLocalParameter4fARB_func glProgramLocalParameter4fARB;
glDeleteProgramsARB_func glDeleteProgramsARB;
glGetProgramivARB_func glGetProgramivARB;
// vertex buffer objects
glGenBuffers_func glGenBuffers;
glDeleteBuffers_func glDeleteBuffers;
glBindBuffer_func glBindBuffer;
glBufferData_func glBufferData;
glEnableVertexAttribArray_func glEnableVertexAttribArray;
glDisableVertexAttribArray_func glDisableVertexAttribArray;
glVertexAttribPointer_func glVertexAttribPointer;
static glXFuncPtr getProcAddress(const char* name)
{
glXFuncPtr ret = NULL;
if (glXGetProcAddress != NULL)
ret = glXGetProcAddress((const GLubyte*) name);
if (ret == NULL)
ret = (glXFuncPtr) dlsym(RTLD_DEFAULT, name);
return ret;
}
void glxResolveFunctions()
{
// handle OpenGL extensions functions
glXGetProcAddress = (glXGetProcAddress_func) getProcAddress("glXGetProcAddress");
if (glXGetProcAddress == NULL)
glXGetProcAddress = (glXGetProcAddress_func) getProcAddress("glXGetProcAddressARB");
glXQueryDrawable = (glXQueryDrawable_func) getProcAddress("glXQueryDrawable");
if (hasGLExtension("GLX_EXT_texture_from_pixmap")) {
glXBindTexImageEXT = (glXBindTexImageEXT_func) getProcAddress("glXBindTexImageEXT");
glXReleaseTexImageEXT = (glXReleaseTexImageEXT_func) getProcAddress("glXReleaseTexImageEXT");
} else {
glXBindTexImageEXT = NULL;
glXReleaseTexImageEXT = NULL;
}
if (hasGLExtension("GLX_MESA_copy_sub_buffer"))
glXCopySubBuffer = (glXCopySubBuffer_func) getProcAddress("glXCopySubBufferMESA");
else
glXCopySubBuffer = NULL;
if (hasGLExtension("GLX_SGI_video_sync")) {
glXGetVideoSync = (glXGetVideoSync_func) getProcAddress("glXGetVideoSyncSGI");
glXWaitVideoSync = (glXWaitVideoSync_func) getProcAddress("glXWaitVideoSyncSGI");
} else {
glXGetVideoSync = NULL;
glXWaitVideoSync = NULL;
}
if (hasGLExtension("GLX_SGI_swap_control")) {
glXSwapInterval = (glXSwapInterval_func) getProcAddress("glXSwapIntervalSGI");
} else if (hasGLExtension("GLX_EXT_swap_control")) {
glXSwapInterval = (glXSwapInterval_func) getProcAddress("glXSwapIntervalEXT");
} else if (hasGLExtension("GLX_MESA_swap_control")) {
glXSwapInterval = (glXSwapInterval_func) getProcAddress("glXSwapIntervalMESA");
} else if (hasGLExtension("GLX_OML_sync_control")) {
glXSwapInterval = (glXSwapInterval_func) getProcAddress("glXSwapIntervalOML");
} else {
glXSwapInterval = NULL;
}
}
#endif
#ifdef KWIN_HAVE_EGL
// EGL
eglCreateImageKHR_func eglCreateImageKHR;
eglDestroyImageKHR_func eglDestroyImageKHR;
eglPostSubBufferNV_func eglPostSubBufferNV;
// GLES
glEGLImageTargetTexture2DOES_func glEGLImageTargetTexture2DOES;
void eglResolveFunctions()
{
if (hasGLExtension("EGL_KHR_image") ||
(hasGLExtension("EGL_KHR_image_base") &&
hasGLExtension("EGL_KHR_image_pixmap"))) {
eglCreateImageKHR = (eglCreateImageKHR_func)eglGetProcAddress("eglCreateImageKHR");
eglDestroyImageKHR = (eglDestroyImageKHR_func)eglGetProcAddress("eglDestroyImageKHR");
} else {
eglCreateImageKHR = NULL;
eglDestroyImageKHR = NULL;
}
if (hasGLExtension("EGL_NV_post_sub_buffer")) {
eglPostSubBufferNV = (eglPostSubBufferNV_func)eglGetProcAddress("eglPostSubBufferNV");
} else {
eglPostSubBufferNV = NULL;
}
}
#endif
void glResolveFunctions(OpenGLPlatformInterface platformInterface)
{
#ifndef KWIN_HAVE_OPENGLES
if (hasGLExtension("GL_ARB_multitexture")) {
GL_RESOLVE_WITH_EXT(glActiveTexture, glActiveTextureARB);
// Get number of texture units
glGetIntegerv(GL_MAX_TEXTURE_UNITS, &glTextureUnitsCount);
} else {
glActiveTexture = NULL;
glTextureUnitsCount = 0;
}
if (hasGLExtension("GL_ARB_framebuffer_object")) {
// see http://www.opengl.org/registry/specs/ARB/framebuffer_object.txt
GL_RESOLVE(glIsRenderbuffer);
GL_RESOLVE(glBindRenderbuffer);
GL_RESOLVE(glDeleteRenderbuffers);
GL_RESOLVE(glGenRenderbuffers);
GL_RESOLVE(glRenderbufferStorage);
GL_RESOLVE(glGetRenderbufferParameteriv);
GL_RESOLVE(glIsFramebuffer);
GL_RESOLVE(glBindFramebuffer);
GL_RESOLVE(glDeleteFramebuffers);
GL_RESOLVE(glGenFramebuffers);
GL_RESOLVE(glCheckFramebufferStatus);
GL_RESOLVE(glFramebufferTexture1D);
GL_RESOLVE(glFramebufferTexture2D);
GL_RESOLVE(glFramebufferTexture3D);
GL_RESOLVE(glFramebufferRenderbuffer);
GL_RESOLVE(glGetFramebufferAttachmentParameteriv);
GL_RESOLVE(glGenerateMipmap);
} else if (hasGLExtension("GL_EXT_framebuffer_object")) {
// see http://www.opengl.org/registry/specs/EXT/framebuffer_object.txt
GL_RESOLVE_WITH_EXT(glIsRenderbuffer, glIsRenderbufferEXT);
GL_RESOLVE_WITH_EXT(glBindRenderbuffer, glBindRenderbufferEXT);
GL_RESOLVE_WITH_EXT(glDeleteRenderbuffers, glDeleteRenderbuffersEXT);
GL_RESOLVE_WITH_EXT(glGenRenderbuffers, glGenRenderbuffersEXT);
GL_RESOLVE_WITH_EXT(glRenderbufferStorage, glRenderbufferStorageEXT);
GL_RESOLVE_WITH_EXT(glGetRenderbufferParameteriv, glGetRenderbufferParameterivEXT);
GL_RESOLVE_WITH_EXT(glIsFramebuffer, glIsFramebufferEXT);
GL_RESOLVE_WITH_EXT(glBindFramebuffer, glBindFramebufferEXT);
GL_RESOLVE_WITH_EXT(glDeleteFramebuffers, glDeleteFramebuffersEXT);
GL_RESOLVE_WITH_EXT(glGenFramebuffers, glGenFramebuffersEXT);
GL_RESOLVE_WITH_EXT(glCheckFramebufferStatus, glCheckFramebufferStatusEXT);
GL_RESOLVE_WITH_EXT(glFramebufferTexture1D, glFramebufferTexture1DEXT);
GL_RESOLVE_WITH_EXT(glFramebufferTexture2D, glFramebufferTexture2DEXT);
GL_RESOLVE_WITH_EXT(glFramebufferTexture3D, glFramebufferTexture3DEXT);
GL_RESOLVE_WITH_EXT(glFramebufferRenderbuffer, glFramebufferRenderbufferEXT);
GL_RESOLVE_WITH_EXT(glGetFramebufferAttachmentParameteriv, glGetFramebufferAttachmentParameterivEXT);
GL_RESOLVE_WITH_EXT(glGenerateMipmap, glGenerateMipmapEXT);
} else {
glIsRenderbuffer = NULL;
glBindRenderbuffer = NULL;
glDeleteRenderbuffers = NULL;
glGenRenderbuffers = NULL;
glRenderbufferStorage = NULL;
glGetRenderbufferParameteriv = NULL;
glIsFramebuffer = NULL;
glBindFramebuffer = NULL;
glDeleteFramebuffers = NULL;
glGenFramebuffers = NULL;
glCheckFramebufferStatus = NULL;
glFramebufferTexture1D = NULL;
glFramebufferTexture2D = NULL;
glFramebufferTexture3D = NULL;
glFramebufferRenderbuffer = NULL;
glGetFramebufferAttachmentParameteriv = NULL;
glGenerateMipmap = NULL;
}
if (hasGLExtension("GL_ARB_framebuffer_object")) {
// see http://www.opengl.org/registry/specs/ARB/framebuffer_object.txt
GL_RESOLVE(glBlitFramebuffer);
} else if (hasGLExtension("GL_EXT_framebuffer_blit")) {
// see http://www.opengl.org/registry/specs/EXT/framebuffer_blit.txt
GL_RESOLVE_WITH_EXT(glBlitFramebuffer, glBlitFramebufferEXT);
} else {
glBlitFramebuffer = NULL;
}
if (hasGLExtension("GL_ARB_shader_objects")) {
// see http://www.opengl.org/registry/specs/ARB/shader_objects.txt
GL_RESOLVE_WITH_EXT(glCreateShader, glCreateShaderObjectARB);
GL_RESOLVE_WITH_EXT(glShaderSource, glShaderSourceARB);
GL_RESOLVE_WITH_EXT(glCompileShader, glCompileShaderARB);
GL_RESOLVE_WITH_EXT(glDeleteShader, glDeleteObjectARB);
GL_RESOLVE_WITH_EXT(glCreateProgram, glCreateProgramObjectARB);
GL_RESOLVE_WITH_EXT(glAttachShader, glAttachObjectARB);
GL_RESOLVE_WITH_EXT(glLinkProgram, glLinkProgramARB);
GL_RESOLVE_WITH_EXT(glUseProgram, glUseProgramObjectARB);
GL_RESOLVE_WITH_EXT(glDeleteProgram, glDeleteObjectARB);
GL_RESOLVE_WITH_EXT(glGetShaderInfoLog, glGetInfoLogARB);
GL_RESOLVE_WITH_EXT(glGetProgramInfoLog, glGetInfoLogARB);
GL_RESOLVE_WITH_EXT(glGetProgramiv, glGetObjectParameterivARB);
GL_RESOLVE_WITH_EXT(glGetShaderiv, glGetObjectParameterivARB);
GL_RESOLVE_WITH_EXT(glUniform1f, glUniform1fARB);
GL_RESOLVE_WITH_EXT(glUniform2f, glUniform2fARB);
GL_RESOLVE_WITH_EXT(glUniform3f, glUniform3fARB);
GL_RESOLVE_WITH_EXT(glUniform4f, glUniform4fARB);
GL_RESOLVE_WITH_EXT(glUniform1i, glUniform1iARB);
GL_RESOLVE_WITH_EXT(glUniform1fv, glUniform1fvARB);
GL_RESOLVE_WITH_EXT(glUniform2fv, glUniform2fvARB);
GL_RESOLVE_WITH_EXT(glUniform3fv, glUniform3fvARB);
GL_RESOLVE_WITH_EXT(glUniform4fv, glUniform4fvARB);
GL_RESOLVE_WITH_EXT(glUniformMatrix4fv, glUniformMatrix4fvARB);
GL_RESOLVE_WITH_EXT(glValidateProgram, glValidateProgramARB);
GL_RESOLVE_WITH_EXT(glGetUniformLocation, glGetUniformLocationARB);
GL_RESOLVE_WITH_EXT(glGetUniformfv, glGetUniformfvARB);
} else {
glCreateShader = NULL;
glShaderSource = NULL;
glCompileShader = NULL;
glDeleteShader = NULL;
glCreateProgram = NULL;
glAttachShader = NULL;
glLinkProgram = NULL;
glUseProgram = NULL;
glDeleteProgram = NULL;
glGetShaderInfoLog = NULL;
glGetProgramInfoLog = NULL;
glGetProgramiv = NULL;
glGetShaderiv = NULL;
glUniform1f = NULL;
glUniform2f = NULL;
glUniform3f = NULL;
glUniform4f = NULL;
glUniform1i = NULL;
glUniform1fv = NULL;
glUniform2fv = NULL;
glUniform3fv = NULL;
glUniform4fv = NULL;
glUniformMatrix4fv = NULL;
glValidateProgram = NULL;
glGetUniformLocation = NULL;
glGetUniformfv = NULL;
}
if (hasGLExtension("GL_ARB_vertex_shader")) {
// see http://www.opengl.org/registry/specs/ARB/vertex_shader.txt
GL_RESOLVE_WITH_EXT(glVertexAttrib1f, glVertexAttrib1fARB);
GL_RESOLVE_WITH_EXT(glBindAttribLocation, glBindAttribLocationARB);
GL_RESOLVE_WITH_EXT(glGetAttribLocation, glGetAttribLocationARB);
GL_RESOLVE_WITH_EXT(glEnableVertexAttribArray, glEnableVertexAttribArrayARB);
GL_RESOLVE_WITH_EXT(glDisableVertexAttribArray, glDisableVertexAttribArrayARB);
GL_RESOLVE_WITH_EXT(glVertexAttribPointer, glVertexAttribPointerARB);
} else {
glVertexAttrib1f = NULL;
glBindAttribLocation = NULL;
glGetAttribLocation = NULL;
glEnableVertexAttribArray = NULL;
glDisableVertexAttribArray = NULL;
glVertexAttribPointer = NULL;
}
if (hasGLExtension("GL_ARB_fragment_program") && hasGLExtension("GL_ARB_vertex_program")) {
// see http://www.opengl.org/registry/specs/ARB/fragment_program.txt
GL_RESOLVE(glProgramStringARB);
GL_RESOLVE(glBindProgramARB);
GL_RESOLVE(glDeleteProgramsARB);
GL_RESOLVE(glGenProgramsARB);
GL_RESOLVE(glProgramLocalParameter4fARB);
GL_RESOLVE(glGetProgramivARB);
} else {
glProgramStringARB = NULL;
glBindProgramARB = NULL;
glDeleteProgramsARB = NULL;
glGenProgramsARB = NULL;
glProgramLocalParameter4fARB = NULL;
glGetProgramivARB = NULL;
}
if (hasGLExtension("GL_ARB_vertex_buffer_object")) {
// see http://www.opengl.org/registry/specs/ARB/vertex_buffer_object.txt
GL_RESOLVE_WITH_EXT(glGenBuffers, glGenBuffersARB);
GL_RESOLVE_WITH_EXT(glDeleteBuffers, glDeleteBuffersARB);
GL_RESOLVE_WITH_EXT(glBindBuffer, glBindBufferARB);
GL_RESOLVE_WITH_EXT(glBufferData, glBufferDataARB);
} else {
glGenBuffers = NULL;
glDeleteBuffers = NULL;
glBindBuffer = NULL;
glBufferData = NULL;
}
#endif
#ifdef KWIN_HAVE_EGL
if (platformInterface == EglPlatformInterface) {
if (hasGLExtension("GL_OES_EGL_image")) {
glEGLImageTargetTexture2DOES = (glEGLImageTargetTexture2DOES_func)eglGetProcAddress("glEGLImageTargetTexture2DOES");
} else {
glEGLImageTargetTexture2DOES = NULL;
}
}
#endif
}
} // namespace
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