1 files changed, 577 insertions, 0 deletions

diff --git a/distrib/sdl-1.2.15/src/video/x11/SDL_x11gl.c b/distrib/sdl-1.2.15/src/video/x11/SDL_x11gl.c
new file mode 100644
index 0000000..aa5297b
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/video/x11/SDL_x11gl.c
@@ -0,0 +1,577 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 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
+
+/* GLX_EXT_visual_rating stuff that might not be in the system headers... */
+#ifndef GLX_VISUAL_CAVEAT_EXT
+#define GLX_VISUAL_CAVEAT_EXT              0x20
+#endif
+#ifndef GLX_NONE_EXT
+#define GLX_NONE_EXT                       0x8000
+#endif
+#ifndef GLX_SLOW_VISUAL_EXT
+#define GLX_SLOW_VISUAL_EXT                0x8001
+#endif
+#ifndef GLX_NON_CONFORMANT_VISUAL_EXT
+#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.
+	 */
+
+	/* http://bugs.debian.org/537487 */
+	if (extensions == NULL) {
+	      return 0;
+	}
+	
+	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.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;
+	}
+	if ( !glXExtensionSupported(this, "GLX_EXT_swap_control") ) {
+		this->gl_data->glXSwapIntervalEXT = NULL;
+	}
+
+	if ( this->gl_config.swap_control >= 0 ) {
+		int rc = -1;
+		if ( this->gl_data->glXSwapIntervalEXT ) {
+			rc = this->gl_data->glXSwapIntervalEXT(GFX_Display, SDL_Window,
+					this->gl_config.swap_control);
+		} else if ( this->gl_data->glXSwapIntervalMESA ) {
+			rc = this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control);
+		} else if ( this->gl_data->glXSwapIntervalSGI ) {
+			rc = this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control);
+		}
+		if (rc == 0) {
+			this->gl_data->swap_interval = 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 = -1;
+	int unsupported = 0;
+	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 {
+			unsupported = 1;
+		}
+		break;
+	    case SDL_GL_SWAP_CONTROL:
+		if ( ( this->gl_data->glXSwapIntervalEXT ) ||
+		     ( this->gl_data->glXSwapIntervalMESA ) ||
+		     ( this->gl_data->glXSwapIntervalSGI ) ) {
+			*value = this->gl_data->swap_interval;
+			return 0;
+		} else {
+			unsupported = 1;
+		}
+		break;
+	    default:
+			unsupported = 1;
+			break;
+	}
+
+	if (unsupported) {
+		SDL_SetError("OpenGL attribute is unsupported on this system");
+	} else {
+		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->glXSwapIntervalEXT = 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);
+
+	/* Save the handle for X11_GL_GetProcAddress() */
+	this->gl_config.dll_handle = handle;
+
+	/* Load new function pointers */
+	this->gl_data->glXGetProcAddress =
+		(void *(*)(const GLubyte *)) GL_LoadFunction(handle, "glXGetProcAddressARB");
+	this->gl_data->glXChooseVisual =
+		(XVisualInfo *(*)(Display *, int, int *)) X11_GL_GetProcAddress(this, "glXChooseVisual");
+	this->gl_data->glXCreateContext =
+		(GLXContext (*)(Display *, XVisualInfo *, GLXContext, int)) X11_GL_GetProcAddress(this, "glXCreateContext");
+	this->gl_data->glXDestroyContext =
+		(void (*)(Display *, GLXContext)) X11_GL_GetProcAddress(this, "glXDestroyContext");
+	this->gl_data->glXMakeCurrent =
+		(int (*)(Display *, GLXDrawable, GLXContext)) X11_GL_GetProcAddress(this, "glXMakeCurrent");
+	this->gl_data->glXSwapBuffers =
+		(void (*)(Display *, GLXDrawable)) X11_GL_GetProcAddress(this, "glXSwapBuffers");
+	this->gl_data->glXGetConfig =
+		(int (*)(Display *, XVisualInfo *, int, int *)) X11_GL_GetProcAddress(this, "glXGetConfig");
+	this->gl_data->glXQueryExtensionsString =
+		(const char *(*)(Display *, int)) X11_GL_GetProcAddress(this, "glXQueryExtensionsString");
+	this->gl_data->glXSwapIntervalSGI =
+		(int (*)(int)) X11_GL_GetProcAddress(this, "glXSwapIntervalSGI");
+	this->gl_data->glXSwapIntervalMESA =
+		(GLint (*)(unsigned)) X11_GL_GetProcAddress(this, "glXSwapIntervalMESA");
+	this->gl_data->glXSwapIntervalEXT =
+		(int (*)(Display*,GLXDrawable,int)) X11_GL_GetProcAddress(this, "glXSwapIntervalEXT");
+
+	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)) {
+		GL_UnloadObject(this->gl_config.dll_handle);
+		this->gl_config.dll_handle = NULL;
+		SDL_SetError("Could not retrieve OpenGL functions");
+		return -1;
+	}
+
+	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)
+{
+	if ( this->gl_data->glXGetProcAddress ) {
+		return this->gl_data->glXGetProcAddress((const GLubyte *)proc);
+	}
+	return GL_LoadFunction(this->gl_config.dll_handle, proc);
+}
+
+#endif /* SDL_VIDEO_OPENGL_GLX */