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-rw-r--r--hacks/glx/xlock-gl-utils.c379
1 files changed, 0 insertions, 379 deletions
diff --git a/hacks/glx/xlock-gl-utils.c b/hacks/glx/xlock-gl-utils.c
deleted file mode 100644
index 0d017b8..0000000
--- a/hacks/glx/xlock-gl-utils.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/* xlock-gl.c --- xscreensaver compatibility layer for xlockmore GL modules.
- * xscreensaver, Copyright (c) 1997-2021 Jamie Zawinski <jwz@jwz.org>
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, provided that
- * the above copyright notice appear in all copies and that both that
- * copyright notice and this permission notice appear in supporting
- * documentation. No representations are made about the suitability of this
- * software for any purpose. It is provided "as is" without express or
- * implied warranty.
- *
- * This file, along with xlockmore.h, make it possible to compile an xlockmore
- * GL module into a standalone program, and thus use it with xscreensaver.
- * By Jamie Zawinski <jwz@jwz.org> on 31-May-97.
- */
-
-#include "xlockmoreI.h"
-
-#ifdef HAVE_GL /* whole file */
-
-#include "texfont.h"
-
-#ifndef isupper
-# define isupper(c) ((c) >= 'A' && (c) <= 'Z')
-#endif
-#ifndef _tolower
-# define _tolower(c) ((c) - 'A' + 'a')
-#endif
-
-
-# ifndef HAVE_EGL
-/* Gag -- we use this to turn X errors from glXCreateContext() into
- something that will actually make sense to the user.
- */
-static XErrorHandler orig_ehandler = 0;
-static Bool got_error = 0;
-
-static int
-BadValue_ehandler (Display *dpy, XErrorEvent *error)
-{
- if (error->error_code == BadValue)
- {
- got_error = True;
- return 0;
- }
- else
- return orig_ehandler (dpy, error);
-}
-#endif /* !HAVE_EGL */
-
-
-GLXContext *
-init_GL(ModeInfo * mi)
-{
- /* The Android version of this function is in android/screenhack-android.c */
- Display *dpy = mi->dpy;
- Window window = mi->window;
- Screen *screen = mi->xgwa.screen;
- Visual *visual = mi->xgwa.visual;
- XVisualInfo vi_in, *vi_out;
- int out_count;
-
- if (mi->glx_context) {
- glXMakeCurrent (dpy, window, mi->glx_context);
- return &mi->glx_context;
- }
-
-# ifdef HAVE_JWZGLES
- mi->jwzgles_state = jwzgles_make_state();
- mi->xlmft->jwzgles_make_current = jwzgles_make_current;
- mi->xlmft->jwzgles_free = jwzgles_free_state;
- mi->xlmft->jwzgles_make_current (mi->jwzgles_state);
-# endif
-
- vi_in.screen = screen_number (screen);
- vi_in.visualid = XVisualIDFromVisual (visual);
- vi_out = XGetVisualInfo (dpy, VisualScreenMask|VisualIDMask,
- &vi_in, &out_count);
- if (! vi_out) abort ();
-
-# ifdef HAVE_EGL
- {
- egl_data *d = (egl_data *) calloc (1, sizeof(*d));
-
- /* The correct EGL config has been selected by utils/visual-gl.c
- (via hacks/glx/xscreensaver-gl-visual) by calling get_egl_config()
- from get_gl_visual and returning the corresponding X11 Visual.
- That visual is the one that was used to create our window. We will
- pass the corresponding visual ID to get_egl_config() to obtain the
- same configuration here. */
- unsigned int vid = XVisualIDFromVisual (visual);
-
- const EGLint ctxattr1[] = {
-# ifdef HAVE_JWZGLES
- EGL_CONTEXT_MAJOR_VERSION, 1, /* Request an OpenGL ES 1.1 context. */
- EGL_CONTEXT_MINOR_VERSION, 1,
-# else
- EGL_CONTEXT_MAJOR_VERSION, 1, /* Request an OpenGL 1.3 context. */
- EGL_CONTEXT_MINOR_VERSION, 3,
-# endif
- EGL_NONE
- };
- const EGLint *ctxattr = ctxattr1;
-
-# ifdef HAVE_GLES3
- const EGLint ctxattr3[] = {
- EGL_CONTEXT_MAJOR_VERSION, 3, /* Request an OpenGL ES 3.0 context. */
- EGL_CONTEXT_MINOR_VERSION, 0,
- EGL_NONE
- };
-
- if (get_boolean_resource (dpy, "prefersGLSL", "PrefersGLSL"))
- ctxattr = ctxattr3;
-# endif /* HAVE_GLES3 */
-
- /* This is re-used, no need to close it. */
- d->egl_display = eglGetPlatformDisplay (EGL_PLATFORM_X11_KHR,
- (EGLNativeDisplayType) dpy, NULL);
- if (!d->egl_display)
- {
- fprintf (stderr, "%s: eglGetPlatformDisplay failed\n", progname);
- abort();
- }
-
- get_egl_config (dpy, d->egl_display, vid, &d->egl_config);
- if (!d->egl_config)
- {
- fprintf (stderr, "%s: no matching EGL config for X11 visual 0x%lx\n",
- progname, vi_out->visualid);
- abort();
- }
-
- d->egl_surface = eglCreatePlatformWindowSurface (d->egl_display,
- d->egl_config,
- &window, NULL);
- if (! d->egl_surface)
- {
- fprintf (stderr, "%s: eglCreatePlatformWindowSurface failed:"
- " window 0x%lx visual 0x%x\n", progname, window, vid);
- abort();
- }
-
-#ifdef HAVE_JWZGLES
- /* This call is not strictly necessary to get an OpenGL ES context
- since the default API is EGL_OPENGL_ES_API, but it makes our
- intention clear.
- */
- if (!eglBindAPI (EGL_OPENGL_ES_API))
- {
- fprintf (stderr, "%s: eglBindAPI failed\n", progname);
- }
-#else /* !HAVE_JWZGLES */
- /* This is necessary to get a OpenGL context instead of an OpenGLES
- context.
- */
- if (!eglBindAPI (EGL_OPENGL_API))
- {
- fprintf (stderr, "%s: eglBindAPI failed\n", progname);
- }
-#endif /* !HAVE_JWZGLES */
-
- d->egl_context = eglCreateContext (d->egl_display, d->egl_config,
- EGL_NO_CONTEXT, ctxattr);
-
-# ifdef HAVE_GLES3
- /* If creation of a GLES 3.0 context failed, fall back to GLES 1.x. */
- if (!d->egl_context && ctxattr != ctxattr1)
- {
- /* fprintf (stderr, "%s: eglCreateContext 3.0 failed\n", progname); */
- d->egl_context = eglCreateContext (d->egl_display, d->egl_config,
- EGL_NO_CONTEXT, ctxattr1);
- }
-# endif /* HAVE_GLES3 */
-
- if (!d->egl_context)
- {
- fprintf (stderr, "%s: eglCreateContext failed\n", progname);
- abort();
- }
-
- /* describe_gl_visual (stderr, screen, visual, False); */
-
- mi->glx_context = d; /* #### leaked */
-
- glXMakeCurrent (dpy, window, mi->glx_context);
- }
-# else /* GLX */
- {
- XSync (dpy, False);
- orig_ehandler = XSetErrorHandler (BadValue_ehandler);
- mi->glx_context = glXCreateContext (dpy, vi_out, 0, GL_TRUE);
- XSync (dpy, False);
- XSetErrorHandler (orig_ehandler);
- if (got_error)
- mi->glx_context = 0;
- }
-
- if (!mi->glx_context)
- {
- fprintf(stderr, "%s: couldn't create GL context for visual 0x%x.\n",
- progname, (unsigned int) XVisualIDFromVisual (visual));
- exit(1);
- }
-
- glXMakeCurrent (dpy, window, mi->glx_context);
-
- {
- GLboolean rgba_mode = 0;
- glGetBooleanv(GL_RGBA_MODE, &rgba_mode);
- if (!rgba_mode)
- {
- glIndexi (WhitePixelOfScreen (screen));
- glClearIndex (BlackPixelOfScreen (screen));
- }
- }
-# endif /* GLX */
-
- XFree((char *) vi_out);
-
-
- /* jwz: the doc for glDrawBuffer says "The initial value is GL_FRONT
- for single-buffered contexts, and GL_BACK for double-buffered
- contexts." However, I find that this is not always the case,
- at least with Mesa 3.4.2 -- sometimes the default seems to be
- GL_FRONT even when glGet(GL_DOUBLEBUFFER) is true. So, let's
- make sure.
-
- Oh, hmm -- maybe this only happens when we are re-using the
- xscreensaver window, and the previous GL hack happened to die with
- the other buffer selected? I'm not sure. Anyway, this fixes it.
- */
- {
- GLboolean d = False;
- glGetBooleanv (GL_DOUBLEBUFFER, &d);
- if (d)
- glDrawBuffer (GL_BACK);
- else
- glDrawBuffer (GL_FRONT);
- }
-
- /* Sometimes glDrawBuffer() throws "invalid op". Dunno why. Ignore. */
- clear_gl_error ();
-
- /* Process the -background argument. */
- {
- char *s = get_string_resource(mi->dpy, "background", "Background");
- XColor c = { 0, };
- if (! XParseColor (dpy, mi->xgwa.colormap, s, &c))
- fprintf (stderr, "%s: can't parse color %s; using black.\n",
- progname, s);
- if (s) free (s);
- glClearColor (c.red / 65535.0,
- c.green / 65535.0,
- c.blue / 65535.0,
- 1.0);
- }
-
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- /* GLXContext is already a pointer type.
- Why this function returns a pointer to a pointer, I have no idea...
- */
- return &mi->glx_context;
-}
-
-
-
-/* clear away any lingering error codes */
-void
-clear_gl_error (void)
-{
- while (glGetError() != GL_NO_ERROR)
- ;
-}
-
-/* report a GL error. */
-void
-check_gl_error (const char *type)
-{
- char buf[100];
- GLenum i;
- const char *e;
- switch ((i = glGetError())) {
- case GL_NO_ERROR: return;
- case GL_INVALID_ENUM: e = "invalid enum"; break;
- case GL_INVALID_VALUE: e = "invalid value"; break;
- case GL_INVALID_OPERATION: e = "invalid operation"; break;
- case GL_STACK_OVERFLOW: e = "stack overflow"; break;
- case GL_STACK_UNDERFLOW: e = "stack underflow"; break;
- case GL_OUT_OF_MEMORY: e = "out of memory"; break;
-#ifdef GL_INVALID_FRAMEBUFFER_OPERATION
- case GL_INVALID_FRAMEBUFFER_OPERATION:
- e = "invalid framebuffer operation";
- break;
-#endif
-#ifdef GL_TABLE_TOO_LARGE_EXT
- case GL_TABLE_TOO_LARGE_EXT: e = "table too large"; break;
-#endif
-#ifdef GL_TEXTURE_TOO_LARGE_EXT
- case GL_TEXTURE_TOO_LARGE_EXT: e = "texture too large"; break;
-#endif
- default:
- e = buf; sprintf (buf, "unknown error %d", (int) i); break;
- }
- fprintf (stderr, "%s: %s error: %s\n", progname, type, e);
- exit (1);
-}
-
-
-/* Callback in xscreensaver_function_table, via xlockmore.c.
- */
-Visual *
-xlockmore_pick_gl_visual (Screen *screen)
-{
- /* pick the "best" visual by interrogating the GL library instead of
- by asking Xlib. GL knows better.
- */
- Visual *v = 0;
- Display *dpy = DisplayOfScreen (screen);
- char *string = get_string_resource (dpy, "visualID", "VisualID");
- char *s;
-
- if (string)
- for (s = string; *s; s++)
- if (isupper (*s)) *s = _tolower (*s);
-
- if (!string || !*string ||
- !strcmp (string, "gl") ||
- !strcmp (string, "best") ||
- !strcmp (string, "color") ||
- !strcmp (string, "default"))
- v = get_gl_visual (screen); /* from ../utils/visual-gl.c */
-
- if (string)
- free (string);
-
- return v;
-}
-
-
-/* Callback in xscreensaver_function_table, via xlockmore.c.
- */
-Bool
-xlockmore_validate_gl_visual (Screen *screen, const char *name, Visual *visual)
-{
- return validate_gl_visual (stderr, screen, name, visual);
-}
-
-
-#ifdef HAVE_EGL
-
-static egl_data *global_egl_kludge = 0;
-
-Bool
-glXMakeCurrent (Display *dpy, GLXDrawable window, egl_data *d)
-{
- if (!d) abort();
- if (! eglMakeCurrent (d->egl_display, d->egl_surface, d->egl_surface,
- d->egl_context))
- abort();
-
- global_egl_kludge = d;
-
- return True;
-}
-
-void
-glXSwapBuffers (Display *dpy, GLXDrawable win)
-{
- egl_data *d = global_egl_kludge;
- if (!d) abort();
- if (! eglSwapBuffers (d->egl_display, d->egl_surface))
- abort();
-}
-
-#endif /* HAVE_EGL */
-
-
-#endif /* HAVE_GL -- whole file */
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