-/* xscreensaver, Copyright (c) 2006-2013 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.
-*/
+/* xscreensaver, Copyright (c) 2006-2015 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 is a subclass of Apple's ScreenSaverView that knows how to run
xscreensaver programs without X11 via the dark magic of the "jwxyz"
#ifdef USE_IPHONE
# include "jwzgles.h"
+# import <OpenGLES/ES1/glext.h>
#else
# import <OpenGL/OpenGL.h>
#endif
@implementation XScreenSaverGLView
-- (void)stopAnimation
-{
- [super stopAnimation];
-
- // Without this, the GL frame stays on screen when switching tabs
- // in System Preferences.
- //
-# ifndef USE_IPHONE
- [NSOpenGLContext clearCurrentContext];
-# endif // !USE_IPHONE
-
- clear_gl_error(); // This hack is defunct, don't let this linger.
-}
-
-
-// #### maybe this could/should just be on 'lockFocus' instead?
-- (void) prepareContext
-{
- if (ogl_ctx) {
-#ifdef USE_IPHONE
- [EAGLContext setCurrentContext:ogl_ctx];
-#else // !USE_IPHONE
- [ogl_ctx makeCurrentContext];
-// check_gl_error ("makeCurrentContext");
- [ogl_ctx update];
-#endif // !USE_IPHONE
- }
-}
-
-
-- (void) resizeContext
-{
-# ifndef USE_IPHONE
- if (ogl_ctx)
- [ogl_ctx setView:self];
-# endif // !USE_IPHONE
-}
-
- (NSOpenGLContext *) oglContext
{
*/
- (CGFloat) hackedContentScaleFactor
{
- return [self contentScaleFactor];
+ NSSize ssize = [[[UIScreen mainScreen] currentMode] size];
+ NSSize bsize = [self bounds].size;
+
+ // Ratio of screen size in pixels to view size in points.
+ GLfloat s = ((ssize.width > ssize.height ? ssize.width : ssize.height) /
+ (bsize.width > bsize.height ? bsize.width : bsize.height));
+ return s;
}
#endif // USE_IPHONE
-- (void) setOglContext: (NSOpenGLContext *) ctx
-{
- ogl_ctx = ctx;
-
-# ifdef USE_IPHONE
- [EAGLContext setCurrentContext: ogl_ctx];
-
- double s = [self hackedContentScaleFactor];
- int w = s * [self bounds].size.width;
- int h = s * [self bounds].size.height;
-
- if (gl_framebuffer) glDeleteFramebuffersOES (1, &gl_framebuffer);
- if (gl_renderbuffer) glDeleteRenderbuffersOES (1, &gl_renderbuffer);
- if (gl_depthbuffer) glDeleteRenderbuffersOES (1, &gl_depthbuffer);
-
- glGenFramebuffersOES (1, &gl_framebuffer);
- glBindFramebufferOES (GL_FRAMEBUFFER_OES, gl_framebuffer);
-
- glGenRenderbuffersOES (1, &gl_renderbuffer);
- glBindRenderbufferOES (GL_RENDERBUFFER_OES, gl_renderbuffer);
-
-// redundant?
-// glRenderbufferStorageOES (GL_RENDERBUFFER_OES, GL_RGBA8_OES, w, h);
- [ogl_ctx renderbufferStorage:GL_RENDERBUFFER_OES
- fromDrawable:(CAEAGLLayer*)self.layer];
-
- glFramebufferRenderbufferOES (GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES,
- GL_RENDERBUFFER_OES, gl_renderbuffer);
-
- glGenRenderbuffersOES (1, &gl_depthbuffer);
- // renderbufferStorage: must be called before this.
- glBindRenderbufferOES (GL_RENDERBUFFER_OES, gl_depthbuffer);
- glRenderbufferStorageOES (GL_RENDERBUFFER_OES, GL_DEPTH_COMPONENT16_OES,
- w, h);
- glFramebufferRenderbufferOES (GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES,
- GL_RENDERBUFFER_OES, gl_depthbuffer);
-
- int err = glCheckFramebufferStatusOES (GL_FRAMEBUFFER_OES);
- switch (err) {
- case GL_FRAMEBUFFER_COMPLETE_OES:
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_OES:
- NSAssert (0, @"framebuffer incomplete attachment");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_OES:
- NSAssert (0, @"framebuffer incomplete missing attachment");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_OES:
- NSAssert (0, @"framebuffer incomplete dimensions");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_FORMATS_OES:
- NSAssert (0, @"framebuffer incomplete formats");
- break;
- case GL_FRAMEBUFFER_UNSUPPORTED_OES:
- NSAssert (0, @"framebuffer unsupported");
- break;
-/*
- case GL_FRAMEBUFFER_UNDEFINED:
- NSAssert (0, @"framebuffer undefined");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
- NSAssert (0, @"framebuffer incomplete draw buffer");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
- NSAssert (0, @"framebuffer incomplete read buffer");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE:
- NSAssert (0, @"framebuffer incomplete multisample");
- break;
- case GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS:
- NSAssert (0, @"framebuffer incomplete layer targets");
- break;
- */
- default:
- NSAssert (0, @"framebuffer incomplete, unknown error 0x%04X", err);
- break;
- }
-
- check_gl_error ("setOglContext");
-
-# endif // USE_IPHONE
-
- [self resizeContext];
-}
-
#ifdef USE_IPHONE
-+ (Class) layerClass
-{
- return [CAEAGLLayer class];
-}
-
- (void) swapBuffers
{
glBindRenderbufferOES (GL_RENDERBUFFER_OES, gl_renderbuffer);
#ifdef USE_BACKBUFFER
-- (void) initLayer
-{
- // Do nothing.
-}
-
-- (void)drawRect:(NSRect)rect
-{
-}
-
-
- (void) animateOneFrame
{
# ifdef USE_IPHONE
}
+/* GL screenhacks don't display a backbuffer, so this is a stub. */
+- (void) enableBackbuffer:(CGSize)new_backbuffer_size
+{
+}
+
+
/* The backbuffer isn't actually used for GL programs, but it needs to
be there for X11 calls to not error out. However, nothing done with
X11 calls will ever show up! It all gets written into the backbuffer
and discarded. That's ok, though, because mostly it's just calls to
XClearWindow and housekeeping stuff like that. So we make a tiny one.
*/
-- (void) createBackbuffer
+- (void) createBackbuffer:(CGSize)new_size
{
- // Don't resize the X11 window to match rotation.
- // Rotation and scaling are handled in GL.
- //
-# ifdef USE_IPHONE
- double s = [self hackedContentScaleFactor];
-# else
- double s = 1;
-# endif
- // Store a realistic size in backbuffer_size, though the buffer is minimal.
- NSRect f = [self bounds];
- backbuffer_size.width = (int) (s * f.size.width);
- backbuffer_size.height = (int) (s * f.size.height);
+ NSAssert (! backbuffer_texture,
+ @"backbuffer_texture shouldn't be used for GL hacks");
+
+ backbuffer_size = new_size;
if (! backbuffer) {
CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
int w = 8;
int h = 8;
- backbuffer = CGBitmapContextCreate (NULL, w, h,
+ backbuffer = CGBitmapContextCreate (NULL, w, h, // yup, only 8px x 8px.
8, w*4, cs,
- kCGImageAlphaPremultipliedLast);
+ (kCGBitmapByteOrder32Little |
+ kCGImageAlphaNoneSkipLast));
CGColorSpaceRelease (cs);
}
}
+
+
+/* Another stub for GL screenhacks. */
+- (void) drawBackbuffer
+{
+}
+
+
+/* Likewise. GL screenhacks control display with glXSwapBuffers(). */
+- (void) flushBackbufer
+{
+}
+
+
# endif // USE_BACKBUFFER
+/* When changing the device orientation, leave the X11 Window and glViewport
+ in portrait configuration. OpenGL hacks examine current_device_rotation()
+ within the scene as needed.
+ */
+- (BOOL)reshapeRotatedWindow
+{
+ return NO;
+}
+
+
+#ifndef USE_IPHONE
+
+- (NSOpenGLPixelFormat *) getGLPixelFormat
+{
+ NSOpenGLPixelFormatAttribute attrs[40];
+ int i = 0;
+ attrs[i++] = NSOpenGLPFAColorSize; attrs[i++] = 24;
+ attrs[i++] = NSOpenGLPFAAlphaSize; attrs[i++] = 8;
+ attrs[i++] = NSOpenGLPFADepthSize; attrs[i++] = 24;
+
+ if ([prefsReader getBooleanResource:"doubleBuffer"])
+ attrs[i++] = NSOpenGLPFADoubleBuffer;
+
+ Bool ms_p = [prefsReader getBooleanResource:"multiSample"];
+
+ /* Sometimes, turning on multisampling kills performance. At one point,
+ I thought the answer was, "only run multisampling on one screen, and
+ leave it turned off on other screens". That's what this code does,
+ but it turns out, that solution is insufficient. I can't really tell
+ what causes poor performance with multisampling, but it's not
+ predictable. Without changing the code, some times a given saver will
+ perform fine with multisampling on, and other times it will perform
+ very badly. Without multisampling, they always perform fine.
+ */
+ // if (ms_p && [[view window] screen] != [[NSScreen screens] objectAtIndex:0])
+ // ms_p = 0;
+
+ if (ms_p) {
+ attrs[i++] = NSOpenGLPFASampleBuffers; attrs[i++] = 1;
+ attrs[i++] = NSOpenGLPFASamples; attrs[i++] = 6;
+ // Don't really understand what this means:
+ // attrs[i++] = NSOpenGLPFANoRecovery;
+ }
+
+ attrs[i] = 0;
+
+ NSOpenGLPixelFormat *pixfmt = [[NSOpenGLPixelFormat alloc]
+ initWithAttributes:attrs];
+
+ if (ms_p && !pixfmt) { // Retry without multisampling.
+ i -= 2;
+ attrs[i] = 0;
+ pixfmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
+ }
+
+ return [pixfmt autorelease];
+}
+
+#else // !USE_IPHONE
+
+- (NSDictionary *)getGLProperties
+{
+ Bool dbuf_p = [prefsReader getBooleanResource:"doubleBuffer"];
+
+ /* There seems to be no way to actually turn off double-buffering in
+ EAGLContext (e.g., no way to draw to the front buffer directly)
+ but if we turn on "retained backing" for non-buffering apps like
+ "pipes", at least the back buffer isn't auto-cleared on them.
+ */
+
+ return [NSDictionary dictionaryWithObjectsAndKeys:
+ kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat,
+ [NSNumber numberWithBool:!dbuf_p], kEAGLDrawablePropertyRetainedBacking,
+ nil];
+}
+
+- (void)addExtraRenderbuffers:(CGSize)size
+{
+ int w = size.width;
+ int h = size.height;
+
+ if (gl_depthbuffer) glDeleteRenderbuffersOES (1, &gl_depthbuffer);
+
+ glGenRenderbuffersOES (1, &gl_depthbuffer);
+ // [EAGLContext renderbufferStorage:fromDrawable:] must be called before this.
+ glBindRenderbufferOES (GL_RENDERBUFFER_OES, gl_depthbuffer);
+ glRenderbufferStorageOES (GL_RENDERBUFFER_OES, GL_DEPTH_COMPONENT16_OES,
+ w, h);
+ glFramebufferRenderbufferOES (GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES,
+ GL_RENDERBUFFER_OES, gl_depthbuffer);
+}
+
+#endif // !USE_IPHONE
+
+
- (void)dealloc {
// ogl_ctx
// gl_framebuffer
XScreenSaverGLView *view = (XScreenSaverGLView *) jwxyz_window_view (win);
NSAssert1 ([view isKindOfClass:[XScreenSaverGLView class]],
@"wrong view class: %@", view);
- NSOpenGLContext *ctx = [view oglContext];
-# ifndef USE_IPHONE
+ // OpenGL initialization is in [XScreenSaverView startAnimation].
- if (!ctx) {
-
- NSOpenGLPixelFormatAttribute attrs[40];
- int i = 0;
- attrs[i++] = NSOpenGLPFAColorSize; attrs[i++] = 24;
- attrs[i++] = NSOpenGLPFAAlphaSize; attrs[i++] = 8;
- attrs[i++] = NSOpenGLPFADepthSize; attrs[i++] = 16;
-
- if (get_boolean_resource (mi->dpy, "doubleBuffer", "DoubleBuffer"))
- attrs[i++] = NSOpenGLPFADoubleBuffer;
-
- Bool ms_p = get_boolean_resource (mi->dpy, "multiSample", "MultiSample");
-
- /* Sometimes, turning on multisampling kills performance. At one point,
- I thought the answer was, "only run multisampling on one screen, and
- leave it turned off on other screens". That's what this code does,
- but it turns out, that solution is insufficient. I can't really tell
- what causes poor performance with multisampling, but it's not
- predictable. Without changing the code, some times a given saver will
- perform fine with multisampling on, and other times it will perform
- very badly. Without multisampling, they always perform fine.
- */
-// if (ms_p && [[view window] screen] != [[NSScreen screens] objectAtIndex:0])
-// ms_p = 0;
-
- if (ms_p) {
- attrs[i++] = NSOpenGLPFASampleBuffers; attrs[i++] = 1;
- attrs[i++] = NSOpenGLPFASamples; attrs[i++] = 6;
- // Don't really understand what this means:
- // attrs[i++] = NSOpenGLPFANoRecovery;
- }
-
- attrs[i] = 0;
-
- NSOpenGLPixelFormat *pixfmt =
- [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
-
- if (ms_p && !pixfmt) { // Retry without multisampling.
- i -= 2;
- attrs[i] = 0;
- pixfmt = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
- }
-
- NSAssert (pixfmt, @"unable to create NSOpenGLPixelFormat");
-
- // #### Analyze says: "Potential leak of an object stored into pixfmt"
- ctx = [[NSOpenGLContext alloc]
- initWithFormat:pixfmt
- shareContext:nil];
-// [pixfmt release]; // #### ???
- }
-
- // Sync refreshes to the vertical blanking interval
- GLint r = 1;
- [ctx setValues:&r forParameter:NSOpenGLCPSwapInterval];
-// check_gl_error ("NSOpenGLCPSwapInterval"); // SEGV sometimes. Too early?
-
- // #### Analyze says: "Potential leak of an object stored into "ctx"
- // But makeCurrentContext retains it (right?)
-
- [ctx makeCurrentContext];
- check_gl_error ("makeCurrentContext");
+# ifdef USE_IPHONE
+ jwzgles_reset ();
+# endif // USE_IPHONE
- [view setOglContext:ctx];
+ // I don't know why this is necessary, but it beats randomly having some
+ // textures be upside down.
+ //
+ glMatrixMode(GL_TEXTURE);
+ glLoadIdentity();
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
- // Clear frame buffer ASAP, else there are bits left over from other apps.
- glClearColor (0, 0, 0, 1);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-// glFinish ();
-// glXSwapBuffers (mi->dpy, mi->window);
-
-
- // Enable multi-threading, if possible. This runs most OpenGL commands
- // and GPU management on a second CPU.
- {
-# ifndef kCGLCEMPEngine
-# define kCGLCEMPEngine 313 // Added in MacOS 10.4.8 + XCode 2.4.
-# endif
- CGLContextObj cctx = CGLGetCurrentContext();
- CGLError err = CGLEnable (cctx, kCGLCEMPEngine);
- if (err != kCGLNoError) {
- NSLog (@"enabling multi-threaded OpenGL failed: %d", err);
- }
- }
-
- check_gl_error ("init_GL");
-
-# else // USE_IPHONE
-
- EAGLContext *ogl_ctx = ctx;
- if (!ogl_ctx) {
-
- Bool dbuf_p =
- get_boolean_resource (mi->dpy, "doubleBuffer", "DoubleBuffer");
-
- /* There seems to be no way to actually turn off double-buffering in
- EAGLContext (e.g., no way to draw to the front buffer directly)
- but if we turn on "retained backing" for non-buffering apps like
- "pipes", at least the back buffer isn't auto-cleared on them.
- */
- CAEAGLLayer *eagl_layer = (CAEAGLLayer *) view.layer;
- eagl_layer.opaque = TRUE;
- eagl_layer.drawableProperties =
- [NSDictionary dictionaryWithObjectsAndKeys:
- kEAGLColorFormatRGBA8, kEAGLDrawablePropertyColorFormat,
- [NSNumber numberWithBool:!dbuf_p], kEAGLDrawablePropertyRetainedBacking,
- nil];
-
- // Without this, the GL frame buffer is half the screen resolution!
- eagl_layer.contentsScale = [UIScreen mainScreen].scale;
-
- ogl_ctx = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES1];
- }
-
- if (!ogl_ctx)
- return 0;
- [view setOglContext:ogl_ctx];
- // #### Analyze says "Potential leak of an object stored into ogl_ctx"
-
- check_gl_error ("OES_init");
-
-# endif // USE_IPHONE
// Caller expects a pointer to an opaque struct... which it dereferences.
// Don't ask me, it's historical...
}
+#if defined GL_INVALID_FRAMEBUFFER_OPERATION_OES && \
+ !defined GL_INVALID_FRAMEBUFFER_OPERATION
+# define GL_INVALID_FRAMEBUFFER_OPERATION GL_INVALID_FRAMEBUFFER_OPERATION_OES
+#endif
+
+
/* report a GL error. */
void
check_gl_error (const char *type)
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
projects / xscreensaver / blobdiff