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-rw-r--r--src/x11/mod.rs336
1 files changed, 336 insertions, 0 deletions
diff --git a/src/x11/mod.rs b/src/x11/mod.rs
new file mode 100644
index 0000000..8849441
--- /dev/null
+++ b/src/x11/mod.rs
@@ -0,0 +1,336 @@
+use {Event, Hints};
+use libc;
+use std::{mem, ptr};
+
+mod ffi;
+
+pub struct Window {
+ display: *mut ffi::Display,
+ window: ffi::Window,
+ context: ffi::GLXContext,
+}
+
+impl Window {
+ pub fn new(dimensions: Option<(uint, uint)>, title: &str, hints: &Hints)
+ -> Result<Window, String>
+ {
+ // calling XOpenDisplay
+ let display = unsafe {
+ let display = ffi::XOpenDisplay(ptr::null());
+ if display.is_null() {
+ return Err(format!("XOpenDisplay failed"));
+ }
+ display
+ };
+
+ // TODO: set error handler
+
+ static VISUAL_ATTRIBUTES: [libc::c_int, ..5] = [
+ ffi::GLX_RGBA,
+ ffi::GLX_DEPTH_SIZE,
+ 24,
+ ffi::GLX_DOUBLEBUFFER,
+ 0
+ ];
+
+ // getting the visual infos
+ let visual_infos = unsafe {
+ let vi = ffi::glXChooseVisual(display, 0, VISUAL_ATTRIBUTES.as_ptr());
+ if vi.is_null() {
+ return Err(format!("glXChooseVisual failed"));
+ }
+ vi
+ };
+
+ // getting the root window
+ let root = unsafe { ffi::XDefaultRootWindow(display) };
+
+ // creating the color map
+ let cmap = unsafe {
+ let cmap = ffi::XCreateColormap(display, root,
+ (*visual_infos).visual, ffi::AllocNone);
+ // TODO: error checking?
+ cmap
+ };
+
+ // creating
+ let mut set_win_attr = {
+ let mut swa: ffi::XSetWindowAttributes = unsafe { mem::zeroed() };
+ swa.colormap = cmap;
+ //swa.event_mask = ExposureMask | KeyPressMask;
+ swa
+ };
+
+ // finally creating the window
+ let window = unsafe {
+ let win = ffi::XCreateWindow(display, root, 10, 10, 800, 600,
+ 0, (*visual_infos).depth, ffi::InputOutput, (*visual_infos).visual,
+ ffi::CWColormap/* | ffi::CWEventMask*/, &mut set_win_attr);
+ win
+ };
+
+ // showing window
+ unsafe { ffi::XMapWindow(display, window) };
+ unsafe { ffi::XStoreName(display, window, mem::transmute(title.as_slice().as_ptr())); }
+ unsafe { ffi::XFlush(display); }
+
+ // creating GL context
+ let context = unsafe {
+ ffi::glXCreateContext(display, visual_infos, ptr::null(), 1)
+ };
+
+ // returning
+ Ok(Window{
+ display: display,
+ window: window,
+ context: context,
+ })
+ }
+
+ pub fn should_close(&self) -> bool {
+ // TODO:
+ false
+ }
+
+ pub fn set_title(&self, title: &str) {
+ unsafe {
+ ffi::XStoreName(self.display, self.window,
+ mem::transmute(title.as_slice().as_ptr()));
+ }
+ }
+
+ pub fn get_position(&self) -> (uint, uint) {
+ unimplemented!()
+ }
+
+ pub fn set_position(&self, x: uint, y: uint) {
+ unimplemented!()
+ }
+
+ pub fn get_size(&self) -> (uint, uint) {
+ unimplemented!()
+ }
+
+ pub fn set_size(&self, x: uint, y: uint) {
+ unimplemented!()
+ }
+
+ pub fn poll_events(&self) -> Vec<Event> {
+ unimplemented!()
+ }
+
+ pub fn wait_events(&self) -> Vec<Event> {
+ // TODO:
+ Vec::new()
+ }
+
+ pub fn make_current(&self) {
+ let res = unsafe { ffi::glXMakeCurrent(self.display, self.window, self.context) };
+ if res == 0 {
+ fail!("glXMakeCurrent failed");
+ }
+ }
+
+ pub fn get_proc_address(&self, addr: &str) -> *const () {
+ use std::c_str::ToCStr;
+ use std::mem;
+
+ unsafe {
+ addr.with_c_str(|s| {
+ let p = ffi::glXGetProcAddress(mem::transmute(s)) as *const ();
+ if !p.is_null() { return p; }
+ println!("{}", p);
+ p
+ })
+ }
+ }
+
+ pub fn swap_buffers(&self) {
+ unsafe { ffi::glXSwapBuffers(self.display, self.window) }
+ }
+}
+
+impl Drop for Window {
+ fn drop(&mut self) {
+ unsafe { ffi::XCloseDisplay(self.display) }
+ }
+}
+
+
+
+/*
+ printf( "Getting matching framebuffer configs\n" );
+ int fbcount;
+ GLXFBConfig* fbc = glXChooseFBConfig(display, DefaultScreen(display), visual_attribs, &fbcount);
+ if (!fbc)
+ {
+ printf( "Failed to retrieve a framebuffer config\n" );
+ exit(1);
+ }
+ printf( "Found %d matching FB configs.\n", fbcount );
+
+ // Pick the FB config/visual with the most samples per pixel
+ printf( "Getting XVisualInfos\n" );
+ int best_fbc = -1, worst_fbc = -1, best_num_samp = -1, worst_num_samp = 999;
+
+ int i;
+ for (i=0; i<fbcount; ++i)
+ {
+ XVisualInfo *vi = glXGetVisualFromFBConfig( display, fbc[i] );
+ if ( vi )
+ {
+ int samp_buf, samples;
+ glXGetFBConfigAttrib( display, fbc[i], GLX_SAMPLE_BUFFERS, &samp_buf );
+ glXGetFBConfigAttrib( display, fbc[i], GLX_SAMPLES , &samples );
+
+ printf( " Matching fbconfig %d, visual ID 0x%2x: SAMPLE_BUFFERS = %d,"
+ " SAMPLES = %d\n",
+ i, vi -> visualid, samp_buf, samples );
+
+ if ( best_fbc < 0 || samp_buf && samples > best_num_samp )
+ best_fbc = i, best_num_samp = samples;
+ if ( worst_fbc < 0 || !samp_buf || samples < worst_num_samp )
+ worst_fbc = i, worst_num_samp = samples;
+ }
+ XFree( vi );
+ }
+
+ GLXFBConfig bestFbc = fbc[ best_fbc ];
+
+ // Be sure to free the FBConfig list allocated by glXChooseFBConfig()
+ XFree( fbc );
+
+ // Get a visual
+ XVisualInfo *vi = glXGetVisualFromFBConfig( display, bestFbc );
+ printf( "Chosen visual ID = 0x%x\n", vi->visualid );
+
+ printf( "Creating colormap\n" );
+ XSetWindowAttributes swa;
+ Colormap cmap;
+ swa.colormap = cmap = XCreateColormap( display,
+ RootWindow( display, vi->screen ),
+ vi->visual, AllocNone );
+ swa.background_pixmap = None ;
+ swa.border_pixel = 0;
+ swa.event_mask = StructureNotifyMask;
+
+ printf( "Creating window\n" );
+ Window win = XCreateWindow( display, RootWindow( display, vi->screen ),
+ 0, 0, 100, 100, 0, vi->depth, InputOutput,
+ vi->visual,
+ CWBorderPixel|CWColormap|CWEventMask, &swa );
+ if ( !win )
+ {
+ printf( "Failed to create window.\n" );
+ exit(1);
+ }
+
+ // Done with the visual info data
+ XFree( vi );
+
+ XStoreName( display, win, "GL 3.0 Window" );
+
+ printf( "Mapping window\n" );
+ XMapWindow( display, win );
+
+ // Get the default screen's GLX extension list
+ const char *glxExts = glXQueryExtensionsString( display,
+ DefaultScreen( display ) );
+
+ // NOTE: It is not necessary to create or make current to a context before
+ // calling glXGetProcAddressARB
+ glXCreateContextAttribsARBProc glXCreateContextAttribsARB = 0;
+ glXCreateContextAttribsARB = (glXCreateContextAttribsARBProc)
+ glXGetProcAddressARB( (const GLubyte *) "glXCreateContextAttribsARB" );
+
+ GLXContext ctx = 0;
+
+ // Install an X error handler so the application won't exit if GL 3.0
+ // context allocation fails.
+ //
+ // Note this error handler is global. All display connections in all threads
+ // of a process use the same error handler, so be sure to guard against other
+ // threads issuing X commands while this code is running.
+ ctxErrorOccurred = false;
+ int (*oldHandler)(Display*, XErrorEvent*) =
+ XSetErrorHandler(&ctxErrorHandler);
+
+ // Check for the GLX_ARB_create_context extension string and the function.
+ // If either is not present, use GLX 1.3 context creation method.
+ if ( !isExtensionSupported( glxExts, "GLX_ARB_create_context" ) ||
+ !glXCreateContextAttribsARB )
+ {
+ printf( "glXCreateContextAttribsARB() not found"
+ " ... using old-style GLX context\n" );
+ ctx = glXCreateNewContext( display, bestFbc, GLX_RGBA_TYPE, 0, True );
+ }
+
+ // If it does, try to get a GL 3.0 context!
+ else
+ {
+ int context_attribs[] =
+ {
+ GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
+ GLX_CONTEXT_MINOR_VERSION_ARB, 0,
+ //GLX_CONTEXT_FLAGS_ARB , GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+ None
+ };
+
+ printf( "Creating context\n" );
+ ctx = glXCreateContextAttribsARB( display, bestFbc, 0,
+ True, context_attribs );
+
+ // Sync to ensure any errors generated are processed.
+ XSync( display, False );
+ if ( !ctxErrorOccurred && ctx )
+ printf( "Created GL 3.0 context\n" );
+ else
+ {
+ // Couldn't create GL 3.0 context. Fall back to old-style 2.x context.
+ // When a context version below 3.0 is requested, implementations will
+ // return the newest context version compatible with OpenGL versions less
+ // than version 3.0.
+ // GLX_CONTEXT_MAJOR_VERSION_ARB = 1
+ context_attribs[1] = 1;
+ // GLX_CONTEXT_MINOR_VERSION_ARB = 0
+ context_attribs[3] = 0;
+
+ ctxErrorOccurred = false;
+
+ printf( "Failed to create GL 3.0 context"
+ " ... using old-style GLX context\n" );
+ ctx = glXCreateContextAttribsARB( display, bestFbc, 0,
+ True, context_attribs );
+ }
+ }
+
+ // Sync to ensure any errors generated are processed.
+ XSync( display, False );
+
+ // Restore the original error handler
+ XSetErrorHandler( oldHandler );
+
+ if ( ctxErrorOccurred || !ctx )
+ {
+ printf( "Failed to create an OpenGL context\n" );
+ exit(1);
+ }
+
+ // Verifying that context is a direct context
+ if ( ! glXIsDirect ( display, ctx ) )
+ {
+ printf( "Indirect GLX rendering context obtained\n" );
+ }
+ else
+ {
+ printf( "Direct GLX rendering context obtained\n" );
+ }
+
+ printf( "Making context current\n" );
+ glXMakeCurrent( display, win, ctx );
+
+ glClearColor( 0, 0.5, 1, 1 );
+ glClear( GL_COLOR_BUFFER_BIT );
+ glXSwapBuffers ( display, win );
+
+*/ \ No newline at end of file
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