| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library 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 for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #include "SDL_x11video.h" |
| #include "../../events/SDL_events_c.h" |
| #include "SDL_x11dga_c.h" |
| #include "SDL_x11gl_c.h" |
| |
| #if defined(__IRIX__) |
| /* IRIX doesn't have a GL library versioning system */ |
| #define DEFAULT_OPENGL "libGL.so" |
| #elif defined(__MACOSX__) |
| #define DEFAULT_OPENGL "/usr/X11R6/lib/libGL.1.dylib" |
| #elif defined(__QNXNTO__) |
| #define DEFAULT_OPENGL "libGL.so.3" |
| #elif defined(__OpenBSD__) |
| #define DEFAULT_OPENGL "libGL.so.4.0" |
| #else |
| #define DEFAULT_OPENGL "libGL.so.1" |
| #endif |
| |
| #ifndef GLX_ARB_multisample |
| #define GLX_ARB_multisample |
| #define GLX_SAMPLE_BUFFERS_ARB 100000 |
| #define GLX_SAMPLES_ARB 100001 |
| #endif |
| |
| #ifndef GLX_EXT_visual_rating |
| #define GLX_EXT_visual_rating |
| #define GLX_VISUAL_CAVEAT_EXT 0x20 |
| #define GLX_NONE_EXT 0x8000 |
| #define GLX_SLOW_VISUAL_EXT 0x8001 |
| #define GLX_NON_CONFORMANT_VISUAL_EXT 0x800D |
| #endif |
| |
| #if SDL_VIDEO_OPENGL_GLX |
| static int glXExtensionSupported(_THIS, const char *extension) |
| { |
| const char *extensions; |
| const char *start; |
| const char *where, *terminator; |
| |
| /* Extension names should not have spaces. */ |
| where = SDL_strchr(extension, ' '); |
| if ( where || *extension == '\0' ) { |
| return 0; |
| } |
| |
| extensions = this->gl_data->glXQueryExtensionsString(GFX_Display,SDL_Screen); |
| /* It takes a bit of care to be fool-proof about parsing the |
| * OpenGL extensions string. Don't be fooled by sub-strings, etc. |
| */ |
| |
| start = extensions; |
| |
| for (;;) { |
| where = SDL_strstr(start, extension); |
| if (!where) break; |
| |
| terminator = where + strlen(extension); |
| if (where == start || *(where - 1) == ' ') |
| if (*terminator == ' ' || *terminator == '\0') return 1; |
| |
| start = terminator; |
| } |
| return 0; |
| } |
| #endif /* SDL_VIDEO_OPENGL_GLX */ |
| |
| XVisualInfo *X11_GL_GetVisual(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL_GLX |
| /* 64 seems nice. */ |
| int attribs[64]; |
| int i; |
| |
| /* load the gl driver from a default path */ |
| if ( ! this->gl_config.driver_loaded ) { |
| /* no driver has been loaded, use default (ourselves) */ |
| if ( X11_GL_LoadLibrary(this, NULL) < 0 ) { |
| return NULL; |
| } |
| } |
| |
| /* See if we already have a window which we must use */ |
| if ( SDL_windowid ) { |
| XWindowAttributes a; |
| XVisualInfo vi_in; |
| int out_count; |
| |
| XGetWindowAttributes(SDL_Display, SDL_Window, &a); |
| vi_in.screen = SDL_Screen; |
| vi_in.visualid = XVisualIDFromVisual(a.visual); |
| glx_visualinfo = XGetVisualInfo(SDL_Display, |
| VisualScreenMask|VisualIDMask, &vi_in, &out_count); |
| return glx_visualinfo; |
| } |
| |
| /* Setup our GLX attributes according to the gl_config. */ |
| i = 0; |
| attribs[i++] = GLX_RGBA; |
| attribs[i++] = GLX_RED_SIZE; |
| attribs[i++] = this->gl_config.red_size; |
| attribs[i++] = GLX_GREEN_SIZE; |
| attribs[i++] = this->gl_config.green_size; |
| attribs[i++] = GLX_BLUE_SIZE; |
| attribs[i++] = this->gl_config.blue_size; |
| |
| if( this->gl_config.alpha_size ) { |
| attribs[i++] = GLX_ALPHA_SIZE; |
| attribs[i++] = this->gl_config.alpha_size; |
| } |
| |
| if( this->gl_config.buffer_size ) { |
| attribs[i++] = GLX_BUFFER_SIZE; |
| attribs[i++] = this->gl_config.buffer_size; |
| } |
| |
| if( this->gl_config.double_buffer ) { |
| attribs[i++] = GLX_DOUBLEBUFFER; |
| } |
| |
| attribs[i++] = GLX_DEPTH_SIZE; |
| attribs[i++] = this->gl_config.depth_size; |
| |
| if( this->gl_config.stencil_size ) { |
| attribs[i++] = GLX_STENCIL_SIZE; |
| attribs[i++] = this->gl_config.stencil_size; |
| } |
| |
| if( this->gl_config.accum_red_size ) { |
| attribs[i++] = GLX_ACCUM_RED_SIZE; |
| attribs[i++] = this->gl_config.accum_red_size; |
| } |
| |
| if( this->gl_config.accum_green_size ) { |
| attribs[i++] = GLX_ACCUM_GREEN_SIZE; |
| attribs[i++] = this->gl_config.accum_green_size; |
| } |
| |
| if( this->gl_config.accum_blue_size ) { |
| attribs[i++] = GLX_ACCUM_BLUE_SIZE; |
| attribs[i++] = this->gl_config.accum_blue_size; |
| } |
| |
| if( this->gl_config.accum_alpha_size ) { |
| attribs[i++] = GLX_ACCUM_ALPHA_SIZE; |
| attribs[i++] = this->gl_config.accum_alpha_size; |
| } |
| |
| if( this->gl_config.stereo ) { |
| attribs[i++] = GLX_STEREO; |
| } |
| |
| if( this->gl_config.multisamplebuffers ) { |
| attribs[i++] = GLX_SAMPLE_BUFFERS_ARB; |
| attribs[i++] = this->gl_config.multisamplebuffers; |
| } |
| |
| if( this->gl_config.multisamplesamples ) { |
| attribs[i++] = GLX_SAMPLES_ARB; |
| attribs[i++] = this->gl_config.multisamplesamples; |
| } |
| |
| if( this->gl_config.accelerated >= 0 && |
| glXExtensionSupported(this, "GLX_EXT_visual_rating") ) { |
| attribs[i++] = GLX_VISUAL_CAVEAT_EXT; |
| attribs[i++] = GLX_NONE_EXT; |
| } |
| |
| #ifdef GLX_DIRECT_COLOR /* Try for a DirectColor visual for gamma support */ |
| if ( !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { |
| attribs[i++] = GLX_X_VISUAL_TYPE; |
| attribs[i++] = GLX_DIRECT_COLOR; |
| } |
| #endif |
| attribs[i++] = None; |
| |
| glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, |
| SDL_Screen, attribs); |
| #ifdef GLX_DIRECT_COLOR |
| if( !glx_visualinfo && !SDL_getenv("SDL_VIDEO_X11_NODIRECTCOLOR") ) { /* No DirectColor visual? Try again.. */ |
| attribs[i-3] = None; |
| glx_visualinfo = this->gl_data->glXChooseVisual(GFX_Display, |
| SDL_Screen, attribs); |
| } |
| #endif |
| if( !glx_visualinfo ) { |
| SDL_SetError( "Couldn't find matching GLX visual"); |
| return NULL; |
| } |
| /* |
| printf("Found GLX visual 0x%x\n", glx_visualinfo->visualid); |
| */ |
| return glx_visualinfo; |
| #else |
| SDL_SetError("X11 driver not configured with OpenGL"); |
| return NULL; |
| #endif |
| } |
| |
| int X11_GL_CreateWindow(_THIS, int w, int h) |
| { |
| int retval; |
| #if SDL_VIDEO_OPENGL_GLX |
| XSetWindowAttributes attributes; |
| unsigned long mask; |
| unsigned long black; |
| |
| black = (glx_visualinfo->visual == DefaultVisual(SDL_Display, |
| SDL_Screen)) |
| ? BlackPixel(SDL_Display, SDL_Screen) : 0; |
| attributes.background_pixel = black; |
| attributes.border_pixel = black; |
| attributes.colormap = SDL_XColorMap; |
| mask = CWBackPixel | CWBorderPixel | CWColormap; |
| |
| SDL_Window = XCreateWindow(SDL_Display, WMwindow, |
| 0, 0, w, h, 0, glx_visualinfo->depth, |
| InputOutput, glx_visualinfo->visual, |
| mask, &attributes); |
| if ( !SDL_Window ) { |
| SDL_SetError("Could not create window"); |
| return -1; |
| } |
| retval = 0; |
| #else |
| SDL_SetError("X11 driver not configured with OpenGL"); |
| retval = -1; |
| #endif |
| return(retval); |
| } |
| |
| int X11_GL_CreateContext(_THIS) |
| { |
| int retval; |
| #if SDL_VIDEO_OPENGL_GLX |
| |
| /* We do this to create a clean separation between X and GLX errors. */ |
| XSync( SDL_Display, False ); |
| glx_context = this->gl_data->glXCreateContext(GFX_Display, |
| glx_visualinfo, NULL, True); |
| XSync( GFX_Display, False ); |
| |
| if ( glx_context == NULL ) { |
| SDL_SetError("Could not create GL context"); |
| return(-1); |
| } |
| if ( X11_GL_MakeCurrent(this) < 0 ) { |
| return(-1); |
| } |
| gl_active = 1; |
| |
| if ( !glXExtensionSupported(this, "GLX_SGI_swap_control") ) { |
| this->gl_data->glXSwapIntervalSGI = NULL; |
| } |
| if ( !glXExtensionSupported(this, "GLX_MESA_swap_control") ) { |
| this->gl_data->glXSwapIntervalMESA = NULL; |
| this->gl_data->glXGetSwapIntervalMESA = NULL; |
| } |
| if ( this->gl_config.swap_control >= 0 ) { |
| if ( this->gl_data->glXSwapIntervalMESA ) { |
| this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control); |
| } else if ( this->gl_data->glXSwapIntervalSGI ) { |
| this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control); |
| } |
| } |
| #else |
| SDL_SetError("X11 driver not configured with OpenGL"); |
| #endif |
| if ( gl_active ) { |
| retval = 0; |
| } else { |
| retval = -1; |
| } |
| return(retval); |
| } |
| |
| void X11_GL_Shutdown(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL_GLX |
| /* Clean up OpenGL */ |
| if( glx_context ) { |
| this->gl_data->glXMakeCurrent(GFX_Display, None, NULL); |
| |
| if (glx_context != NULL) |
| this->gl_data->glXDestroyContext(GFX_Display, glx_context); |
| |
| glx_context = NULL; |
| } |
| gl_active = 0; |
| #endif /* SDL_VIDEO_OPENGL_GLX */ |
| } |
| |
| #if SDL_VIDEO_OPENGL_GLX |
| |
| /* Make the current context active */ |
| int X11_GL_MakeCurrent(_THIS) |
| { |
| int retval; |
| |
| retval = 0; |
| if ( ! this->gl_data->glXMakeCurrent(GFX_Display, |
| SDL_Window, glx_context) ) { |
| SDL_SetError("Unable to make GL context current"); |
| retval = -1; |
| } |
| XSync( GFX_Display, False ); |
| |
| /* More Voodoo X server workarounds... Grr... */ |
| SDL_Lock_EventThread(); |
| X11_CheckDGAMouse(this); |
| SDL_Unlock_EventThread(); |
| |
| return(retval); |
| } |
| |
| /* Get attribute data from glX. */ |
| int X11_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value) |
| { |
| int retval; |
| int glx_attrib = None; |
| |
| switch( attrib ) { |
| case SDL_GL_RED_SIZE: |
| glx_attrib = GLX_RED_SIZE; |
| break; |
| case SDL_GL_GREEN_SIZE: |
| glx_attrib = GLX_GREEN_SIZE; |
| break; |
| case SDL_GL_BLUE_SIZE: |
| glx_attrib = GLX_BLUE_SIZE; |
| break; |
| case SDL_GL_ALPHA_SIZE: |
| glx_attrib = GLX_ALPHA_SIZE; |
| break; |
| case SDL_GL_DOUBLEBUFFER: |
| glx_attrib = GLX_DOUBLEBUFFER; |
| break; |
| case SDL_GL_BUFFER_SIZE: |
| glx_attrib = GLX_BUFFER_SIZE; |
| break; |
| case SDL_GL_DEPTH_SIZE: |
| glx_attrib = GLX_DEPTH_SIZE; |
| break; |
| case SDL_GL_STENCIL_SIZE: |
| glx_attrib = GLX_STENCIL_SIZE; |
| break; |
| case SDL_GL_ACCUM_RED_SIZE: |
| glx_attrib = GLX_ACCUM_RED_SIZE; |
| break; |
| case SDL_GL_ACCUM_GREEN_SIZE: |
| glx_attrib = GLX_ACCUM_GREEN_SIZE; |
| break; |
| case SDL_GL_ACCUM_BLUE_SIZE: |
| glx_attrib = GLX_ACCUM_BLUE_SIZE; |
| break; |
| case SDL_GL_ACCUM_ALPHA_SIZE: |
| glx_attrib = GLX_ACCUM_ALPHA_SIZE; |
| break; |
| case SDL_GL_STEREO: |
| glx_attrib = GLX_STEREO; |
| break; |
| case SDL_GL_MULTISAMPLEBUFFERS: |
| glx_attrib = GLX_SAMPLE_BUFFERS_ARB; |
| break; |
| case SDL_GL_MULTISAMPLESAMPLES: |
| glx_attrib = GLX_SAMPLES_ARB; |
| break; |
| case SDL_GL_ACCELERATED_VISUAL: |
| if ( glXExtensionSupported(this, "GLX_EXT_visual_rating") ) { |
| glx_attrib = GLX_VISUAL_CAVEAT_EXT; |
| retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); |
| if ( *value == GLX_SLOW_VISUAL_EXT ) { |
| *value = SDL_FALSE; |
| } else { |
| *value = SDL_TRUE; |
| } |
| return retval; |
| } else { |
| return(-1); |
| } |
| break; |
| case SDL_GL_SWAP_CONTROL: |
| if ( this->gl_data->glXGetSwapIntervalMESA ) { |
| *value = this->gl_data->glXGetSwapIntervalMESA(); |
| return(0); |
| } else { |
| return(-1); |
| } |
| break; |
| default: |
| return(-1); |
| } |
| |
| retval = this->gl_data->glXGetConfig(GFX_Display, glx_visualinfo, glx_attrib, value); |
| |
| return retval; |
| } |
| |
| void X11_GL_SwapBuffers(_THIS) |
| { |
| this->gl_data->glXSwapBuffers(GFX_Display, SDL_Window); |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL_GLX */ |
| |
| #define OPENGL_REQUIRS_DLOPEN |
| #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN) |
| #include <dlfcn.h> |
| #define GL_LoadObject(X) dlopen(X, (RTLD_NOW|RTLD_GLOBAL)) |
| #define GL_LoadFunction dlsym |
| #define GL_UnloadObject dlclose |
| #else |
| #define GL_LoadObject SDL_LoadObject |
| #define GL_LoadFunction SDL_LoadFunction |
| #define GL_UnloadObject SDL_UnloadObject |
| #endif |
| |
| void X11_GL_UnloadLibrary(_THIS) |
| { |
| #if SDL_VIDEO_OPENGL_GLX |
| if ( this->gl_config.driver_loaded ) { |
| |
| GL_UnloadObject(this->gl_config.dll_handle); |
| |
| this->gl_data->glXGetProcAddress = NULL; |
| this->gl_data->glXChooseVisual = NULL; |
| this->gl_data->glXCreateContext = NULL; |
| this->gl_data->glXDestroyContext = NULL; |
| this->gl_data->glXMakeCurrent = NULL; |
| this->gl_data->glXSwapBuffers = NULL; |
| this->gl_data->glXSwapIntervalSGI = NULL; |
| this->gl_data->glXSwapIntervalMESA = NULL; |
| this->gl_data->glXGetSwapIntervalMESA = NULL; |
| |
| this->gl_config.dll_handle = NULL; |
| this->gl_config.driver_loaded = 0; |
| } |
| #endif |
| } |
| |
| #if SDL_VIDEO_OPENGL_GLX |
| |
| /* Passing a NULL path means load pointers from the application */ |
| int X11_GL_LoadLibrary(_THIS, const char* path) |
| { |
| void* handle = NULL; |
| |
| if ( gl_active ) { |
| SDL_SetError("OpenGL context already created"); |
| return -1; |
| } |
| |
| if ( path == NULL ) { |
| path = SDL_getenv("SDL_VIDEO_GL_DRIVER"); |
| if ( path == NULL ) { |
| path = DEFAULT_OPENGL; |
| } |
| } |
| |
| handle = GL_LoadObject(path); |
| if ( handle == NULL ) { |
| #if defined(OPENGL_REQUIRS_DLOPEN) && defined(SDL_LOADSO_DLOPEN) |
| SDL_SetError("Failed loading %s", path); |
| #else |
| /* SDL_LoadObject() will call SDL_SetError() for us. */ |
| #endif |
| return -1; |
| } |
| |
| /* Unload the old driver and reset the pointers */ |
| X11_GL_UnloadLibrary(this); |
| |
| /* Load new function pointers */ |
| this->gl_data->glXGetProcAddress = |
| (void *(*)(const GLubyte *)) GL_LoadFunction(handle, "glXGetProcAddressARB"); |
| this->gl_data->glXChooseVisual = |
| (XVisualInfo *(*)(Display *, int, int *)) GL_LoadFunction(handle, "glXChooseVisual"); |
| this->gl_data->glXCreateContext = |
| (GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) GL_LoadFunction(handle, "glXCreateContext"); |
| this->gl_data->glXDestroyContext = |
| (void (*)(Display *, GLXContext)) GL_LoadFunction(handle, "glXDestroyContext"); |
| this->gl_data->glXMakeCurrent = |
| (int (*)(Display *, GLXDrawable, GLXContext)) GL_LoadFunction(handle, "glXMakeCurrent"); |
| this->gl_data->glXSwapBuffers = |
| (void (*)(Display *, GLXDrawable)) GL_LoadFunction(handle, "glXSwapBuffers"); |
| this->gl_data->glXGetConfig = |
| (int (*)(Display *, XVisualInfo *, int, int *)) GL_LoadFunction(handle, "glXGetConfig"); |
| this->gl_data->glXQueryExtensionsString = |
| (const char *(*)(Display *, int)) GL_LoadFunction(handle, "glXQueryExtensionsString"); |
| this->gl_data->glXSwapIntervalSGI = |
| (int (*)(int)) GL_LoadFunction(handle, "glXSwapIntervalSGI"); |
| this->gl_data->glXSwapIntervalMESA = |
| (GLint (*)(unsigned)) GL_LoadFunction(handle, "glXSwapIntervalMESA"); |
| this->gl_data->glXGetSwapIntervalMESA = |
| (GLint (*)(void)) GL_LoadFunction(handle, "glXGetSwapIntervalMESA"); |
| |
| if ( (this->gl_data->glXChooseVisual == NULL) || |
| (this->gl_data->glXCreateContext == NULL) || |
| (this->gl_data->glXDestroyContext == NULL) || |
| (this->gl_data->glXMakeCurrent == NULL) || |
| (this->gl_data->glXSwapBuffers == NULL) || |
| (this->gl_data->glXGetConfig == NULL) || |
| (this->gl_data->glXQueryExtensionsString == NULL)) { |
| SDL_SetError("Could not retrieve OpenGL functions"); |
| return -1; |
| } |
| |
| this->gl_config.dll_handle = handle; |
| this->gl_config.driver_loaded = 1; |
| if ( path ) { |
| SDL_strlcpy(this->gl_config.driver_path, path, |
| SDL_arraysize(this->gl_config.driver_path)); |
| } else { |
| *this->gl_config.driver_path = '\0'; |
| } |
| return 0; |
| } |
| |
| void *X11_GL_GetProcAddress(_THIS, const char* proc) |
| { |
| void* handle; |
| |
| handle = this->gl_config.dll_handle; |
| if ( this->gl_data->glXGetProcAddress ) { |
| return this->gl_data->glXGetProcAddress((const GLubyte *)proc); |
| } |
| return GL_LoadFunction(handle, proc); |
| } |
| |
| #endif /* SDL_VIDEO_OPENGL_GLX */ |