Initial revision

1 files changed, 1155 insertions, 0 deletions

diff --git a/GL/apple/aglGlx.c b/GL/apple/aglGlx.c
new file mode 100644
index 000000000..ae3276a02
--- /dev/null
+++ b/GL/apple/aglGlx.c
@@ -0,0 +1,1155 @@
+/*
+ * GLX implementation that uses Apple's AGL.framework for OpenGL
+ */
+/*
+ * Copyright (c) 2002 Greg Parker. All Rights Reserved.
+ *
+ * Portions of this file are copied from xf86glx.c,
+ * which contains the following copyright:
+ *
+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name(s) of the above copyright
+ * holders shall not be used in advertising or otherwise to promote the sale,
+ * use or other dealings in this Software without prior written authorization.
+ */
+/* $XFree86: xc/programs/Xserver/GL/apple/aglGlx.c,v 1.3 2003/10/13 00:30:54 torrey Exp $ */
+
+#include "quartzCommon.h"
+#include <AGL/agl.h>
+#include "cr.h"
+
+// X11 and X11's glx
+#undef BOOL
+#define BOOL xBOOL
+#include "quartz.h"
+#include <miscstruct.h>
+#include <windowstr.h>
+#include <resource.h>
+#include <GL/glxint.h>
+#include <GL/glxtokens.h>
+#include <scrnintstr.h>
+#include <glxserver.h>
+#include <glxscreens.h>
+#include <glxdrawable.h>
+#include <glxcontext.h>
+#include <glxext.h>
+#include <glxutil.h>
+#include <glxscreens.h>
+#include <GL/internal/glcore.h>
+#undef BOOL
+
+// Write debugging output, or not
+#ifdef GLAQUA_DEBUG
+#define GLAQUA_DEBUG_MSG ErrorF
+#else
+#define GLAQUA_DEBUG_MSG(a, ...)
+#endif
+
+
+// The following GL functions don't have an EXT suffix in OpenGL.framework.
+GLboolean glAreTexturesResidentEXT (GLsizei a, const GLuint *b, GLboolean *c) {
+    return glAreTexturesResident(a, b, c);
+}
+void glDeleteTexturesEXT (GLsizei d, const GLuint *e) {
+    glDeleteTextures(d, e);
+}
+void glGenTexturesEXT (GLsizei f, GLuint *g) {
+    glGenTextures(f, g);
+}
+GLboolean glIsTextureEXT (GLuint h) {
+    return glIsTexture(h);
+}
+
+
+// some prototypes
+static Bool glAquaScreenProbe(int screen);
+static Bool glAquaInitVisuals(VisualPtr *visualp, DepthPtr *depthp,
+			      int *nvisualp, int *ndepthp,
+			      int *rootDepthp, VisualID *defaultVisp,
+			      unsigned long sizes, int bitsPerRGB);
+static void glAquaSetVisualConfigs(int nconfigs, __GLXvisualConfig *configs,
+				   void **privates);
+static __GLinterface *glAquaCreateContext(__GLimports *imports,
+					  __GLcontextModes *mode,
+					  __GLinterface *shareGC);
+static void glAquaCreateBuffer(__GLXdrawablePrivate *glxPriv);
+static void glAquaResetExtension(void);
+
+
+/*
+ * This structure is statically allocated in the __glXScreens[]
+ * structure.  This struct is not used anywhere other than in
+ * __glXScreenInit to initialize each of the active screens
+ * (__glXActiveScreens[]).  Several of the fields must be initialized by
+ * the screenProbe routine before they are copied to the active screens
+ * struct.  In particular, the contextCreate, pGlxVisual, numVisuals,
+ * and numUsableVisuals fields must be initialized.
+ */
+__GLXscreenInfo __glDDXScreenInfo = {
+    glAquaScreenProbe,   /* Must be generic and handle all screens */
+    glAquaCreateContext, /* Substitute screen's createContext routine */
+    glAquaCreateBuffer,  /* Substitute screen's createBuffer routine */
+    NULL,                 /* Set up pGlxVisual in probe */
+    NULL,                 /* Set up pVisualPriv in probe */
+    0,                    /* Set up numVisuals in probe */
+    0,                    /* Set up numUsableVisuals in probe */
+    "Vendor String",      /* GLXvendor is overwritten by __glXScreenInit */
+    "Version String",     /* GLXversion is overwritten by __glXScreenInit */
+    "Extensions String",  /* GLXextensions is overwritten by __glXScreenInit */
+    NULL                  /* WrappedPositionWindow is overwritten */
+};
+
+__GLXextensionInfo __glDDXExtensionInfo = {
+    GL_CORE_APPLE,
+    glAquaResetExtension,
+    glAquaInitVisuals,
+    glAquaSetVisualConfigs
+};
+
+
+// prototypes
+
+static GLboolean glAquaDestroyContext(__GLcontext *gc);
+static GLboolean glAquaLoseCurrent(__GLcontext *gc);
+static GLboolean glAquaMakeCurrent(__GLcontext *gc);
+static GLboolean glAquaShareContext(__GLcontext *gc, __GLcontext *gcShare);
+static GLboolean glAquaCopyContext(__GLcontext *dst, const __GLcontext *src,
+			    GLuint mask);
+static GLboolean glAquaForceCurrent(__GLcontext *gc);
+
+/* Drawing surface notification callbacks */
+static GLboolean glAquaNotifyResize(__GLcontext *gc);
+static void glAquaNotifyDestroy(__GLcontext *gc);
+static void glAquaNotifySwapBuffers(__GLcontext *gc);
+
+/* Dispatch table override control for external agents like libGLS */
+static struct __GLdispatchStateRec* glAquaDispatchExec(__GLcontext *gc);
+static void glAquaBeginDispatchOverride(__GLcontext *gc);
+static void glAquaEndDispatchOverride(__GLcontext *gc);
+
+
+static __GLexports glAquaExports = {
+    glAquaDestroyContext,
+    glAquaLoseCurrent,
+    glAquaMakeCurrent,
+    glAquaShareContext,
+    glAquaCopyContext,
+    glAquaForceCurrent,
+
+    glAquaNotifyResize,
+    glAquaNotifyDestroy,
+    glAquaNotifySwapBuffers,
+
+    glAquaDispatchExec,
+    glAquaBeginDispatchOverride,
+    glAquaEndDispatchOverride
+};
+
+
+typedef struct {
+    int num_vis;
+    __GLXvisualConfig *glx_vis;
+    void **priv;
+
+    // wrapped screen functions
+    RealizeWindowProcPtr RealizeWindow;
+    UnrealizeWindowProcPtr UnrealizeWindow;
+} glAquaScreenRec;
+
+static glAquaScreenRec glAquaScreens[MAXSCREENS];
+
+
+// __GLdrawablePrivate->private
+typedef struct {
+    GLboolean (*resize)(__GLdrawableBuffer *buf, GLint x, GLint y,
+                        GLuint width, GLuint height,
+                        __GLdrawablePrivate *glPriv,
+                        GLuint bufferMask);
+} GLAquaDrawableRec;
+
+struct __GLcontextRec {
+  struct __GLinterfaceRec interface; // required to be first
+
+  AGLContext ctx;
+  AGLPixelFormat pixelFormat;
+  Bool isAttached; // TRUE if ctx is really attached to a window
+};
+
+
+// Context manipulation; return GL_FALSE on failure
+static GLboolean glAquaDestroyContext(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("glAquaDestroyContext (ctx 0x%x)\n", gc->ctx);
+
+    if (gc) {
+        if (gc->ctx) aglDestroyContext(gc->ctx);
+        if (gc->pixelFormat) aglDestroyPixelFormat(gc->pixelFormat);
+        free(gc);
+    }
+    return GL_TRUE;
+}
+
+
+static GLboolean glAquaLoseCurrent(__GLcontext *gc)
+{
+    // GLAQUA_DEBUG_MSG("glAquaLoseCurrent (ctx 0x%x)\n", gc->ctx);
+    aglSetCurrentContext(NULL);
+    __glXLastContext = NULL; // Mesa does this; why?
+    return GL_TRUE;
+}
+
+// (x, y, w, h) is global coordinates of view or -1
+// glPriv may be NULL
+static void attach(__GLcontext *gc, __GLdrawablePrivate *glPriv,
+                   int x, int y, int w, int h)
+{
+    __GLXdrawablePrivate *glxPriv;
+
+    if (glPriv == NULL) {
+        // attaching to nothing
+        GLAQUA_DEBUG_MSG("unattaching\n");
+        aglSetDrawable(gc->ctx, NULL);
+        gc->isAttached = FALSE;
+        return;
+    }
+
+    // Note that when resizing, the X11 WindowPtr already has its
+    // new size and position, but the Aqua window does not.
+
+    glxPriv = (__GLXdrawablePrivate *)glPriv->other;
+
+    if (glxPriv->type == DRAWABLE_WINDOW) {
+        WindowPtr pWin = (WindowPtr) glxPriv->pDraw;
+        WindowPtr topWin = quartzProcs->TopLevelParent(pWin);
+        CRWindowPtr crWinPtr;
+        AGLDrawable newPort;
+
+        crWinPtr = (CRWindowPtr) quartzProcs->FrameForWindow(pWin, TRUE);
+
+        if (crWinPtr) {
+            newPort = (AGLDrawable) crWinPtr->port;
+        } else {
+            newPort = NULL;
+        }
+
+        if (newPort) {
+            // fixme won't be a CGrafPtr if currently offscreen or fullscreen
+            AGLDrawable oldPort = aglGetDrawable(gc->ctx);
+            // AGLDrawable newPort = GetWindowPort(window);
+            GLint frame[4] = {x, y, w, h}; // fixme multi-screen?
+            // frame is now X11-global
+            frame[0] -= topWin->drawable.x - topWin->borderWidth;
+            frame[1] -= topWin->drawable.y - topWin->borderWidth;
+            // frame is now window-local
+            // GL uses flipped coordinates
+            frame[1] = topWin->drawable.height + 2*topWin->borderWidth -
+                       frame[1] - frame[3];
+
+            // GLAQUA_DEBUG_MSG("local size %d %d %d %d\n",
+            // frame[0], frame[1], frame[2], frame[3]);
+
+            if (oldPort != newPort) {
+                // fixme retain/release windows
+                aglSetDrawable(gc->ctx, newPort);
+            }
+            aglSetInteger(gc->ctx, AGL_BUFFER_RECT, frame);
+            aglEnable(gc->ctx, AGL_BUFFER_RECT);
+            // aglSetInteger(gc->ctx, AGL_SWAP_RECT, frame);
+            // aglEnable(gc->ctx, AGL_SWAP_RECT);
+            aglUpdateContext(gc->ctx);
+            gc->isAttached = TRUE;
+            GLAQUA_DEBUG_MSG("attached\n");
+        } else {
+            // attach to not-yet-realized window - will really attach later
+            GLAQUA_DEBUG_MSG("couldn't attach\n");
+            aglSetDrawable(gc->ctx, NULL);
+            gc->isAttached = FALSE;
+        }
+    } else {
+        GLAQUA_DEBUG_MSG("attach: attach to non-window unimplemented\n");
+        aglSetDrawable(gc->ctx, NULL);
+        gc->isAttached = FALSE;
+    }
+}
+
+static GLboolean glAquaMakeCurrent(__GLcontext *gc)
+{
+#if 0
+    __GLdrawablePrivate *glPriv = gc->interface.imports.getDrawablePrivate(gc);
+    GLAQUA_DEBUG_MSG("glAquaMakeCurrent (ctx 0x%x)\n", gc->ctx);
+
+    if (!gc->isAttached) {
+        attach(gc, glPriv, glPriv->xOrigin, glPriv->yOrigin, glPriv->width, glPriv->height);
+    }
+#endif
+    return aglSetCurrentContext(gc->ctx);
+}
+
+static GLboolean glAquaShareContext(__GLcontext *gc, __GLcontext *gcShare)
+{
+  GLAQUA_DEBUG_MSG("glAquaShareContext unimplemented\n");
+
+  return GL_TRUE;
+}
+
+
+static GLboolean glAquaCopyContext(__GLcontext *dst, const __GLcontext *src,
+                                   GLuint mask)
+{
+  GLAQUA_DEBUG_MSG("glAquaCopyContext\n");
+  aglCopyContext(src->ctx, dst->ctx, mask);
+  return GL_TRUE;
+}
+
+static GLboolean glAquaForceCurrent(__GLcontext *gc)
+{
+    //     GLAQUA_DEBUG_MSG("glAquaForceCurrent (ctx 0x%x)\n", gc->ctx);
+    return aglSetCurrentContext(gc->ctx);
+}
+
+/* Drawing surface notification callbacks */
+
+static GLboolean glAquaNotifyResize(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaNotifyResize");
+    return GL_TRUE;
+}
+
+static void glAquaNotifyDestroy(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaNotifyDestroy");
+}
+
+static void glAquaNotifySwapBuffers(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaNotifySwapBuffers");
+}
+
+/* Dispatch table override control for external agents like libGLS */
+static struct __GLdispatchStateRec* glAquaDispatchExec(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaDispatchExec");
+    return NULL;
+}
+
+static void glAquaBeginDispatchOverride(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaBeginDispatchOverride");
+}
+
+static void glAquaEndDispatchOverride(__GLcontext *gc)
+{
+    GLAQUA_DEBUG_MSG("unimplemented glAquaEndDispatchOverride");
+}
+
+
+static AGLPixelFormat makeFormat(__GLcontextModes *mode)
+{
+    int i;
+    GLint attr[64]; // currently uses max of 30
+    AGLPixelFormat result;
+
+    GLAQUA_DEBUG_MSG("makeFormat\n");
+
+    i = 0;
+
+    // attr [i++] = AGL_ACCELERATED; // require hwaccel - BAD for multiscreen
+    // attr [i++] = AGL_NO_RECOVERY; // disable fallback renderers - BAD
+
+    if (mode->stereoMode) {
+        attr[i++] = AGL_STEREO;
+    }
+    if (mode->doubleBufferMode) {
+        attr[i++] = AGL_DOUBLEBUFFER;
+    }
+
+    if (mode->colorIndexMode) {
+        attr[i++] = AGL_BUFFER_SIZE;
+        attr[i++] = mode->indexBits;
+    }
+
+    if (mode->rgbMode) {
+        attr[i++] = AGL_RGBA;
+        attr[i++] = AGL_RED_SIZE;
+        attr[i++] = mode->redBits;
+        attr[i++] = AGL_GREEN_SIZE;
+        attr[i++] = mode->greenBits;
+        attr[i++] = AGL_BLUE_SIZE;
+        attr[i++] = mode->blueBits;
+        attr[i++] = AGL_ALPHA_SIZE;
+        attr[i++] = mode->alphaBits;
+    }
+
+    if (mode->haveAccumBuffer) {
+        attr[i++] = AGL_ACCUM_RED_SIZE;
+        attr[i++] = mode->accumRedBits;
+        attr[i++] = AGL_ACCUM_GREEN_SIZE;
+        attr[i++] = mode->accumGreenBits;
+        attr[i++] = AGL_ACCUM_BLUE_SIZE;
+        attr[i++] = mode->accumBlueBits;
+        attr[i++] = AGL_ACCUM_ALPHA_SIZE;
+        attr[i++] = mode->accumAlphaBits;
+    }
+    if (mode->haveDepthBuffer) {
+        attr[i++] = AGL_DEPTH_SIZE;
+        attr[i++] = mode->depthBits;
+    }
+    if (mode->haveStencilBuffer) {
+        attr[i++] = AGL_STENCIL_SIZE;
+        attr[i++] = mode->stencilBits;
+    }
+
+    attr[i++] = AGL_AUX_BUFFERS;
+    attr[i++] = mode->numAuxBuffers;
+
+    attr[i++] = AGL_LEVEL;
+    attr[i++] = mode->level;
+
+    // mode->pixmapMode ?
+
+    attr[i++] = AGL_NONE; // end of option list
+
+    GLAQUA_DEBUG_MSG("makeFormat almost done\n");
+    result = aglChoosePixelFormat(NULL, 0, attr);
+    GLAQUA_DEBUG_MSG("makeFormat done (0x%x)\n", result);
+    return result;
+}
+
+static __GLinterface *glAquaCreateContext(__GLimports *imports,
+					  __GLcontextModes *mode,
+					  __GLinterface *shareGC)
+{
+    __GLcontext *result;
+    __GLcontext *sharectx = (__GLcontext *)shareGC;
+    GLint value;
+
+    GLAQUA_DEBUG_MSG("glAquaCreateContext\n");
+
+    result = (__GLcontext *)malloc(sizeof(__GLcontext));
+    if (!result) return NULL;
+
+    result->interface.imports = *imports;
+    result->interface.exports = glAquaExports;
+
+    result->pixelFormat = makeFormat(mode);
+    if (!result->pixelFormat) {
+        free(result);
+        return NULL;
+    }
+
+    result->ctx = aglCreateContext(result->pixelFormat,
+                        (sharectx && sharectx->ctx) ? sharectx->ctx : NULL);
+
+    if (!result->ctx) {
+        aglDestroyPixelFormat(result->pixelFormat);
+        free(result);
+        return NULL;
+    }
+
+    result->isAttached = FALSE;
+
+    // Tell aglSwapBuffers to wait for vertical retrace
+    value = 1;
+    aglSetInteger(result->ctx, AGL_SWAP_INTERVAL, &value);
+
+    GLAQUA_DEBUG_MSG("glAquaCreateContext done\n");
+    return (__GLinterface *)result;
+}
+
+
+Bool
+glAquaRealizeWindow(WindowPtr pWin)
+{
+    // If this window has GL contexts, tell them to reattach
+    Bool result;
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    glAquaScreenRec *screenPriv = &glAquaScreens[pScreen->myNum];
+    __GLXdrawablePrivate *glxPriv;
+
+    GLAQUA_DEBUG_MSG("glAquaRealizeWindow\n");
+
+    // Allow the window to be created (RootlessRealizeWindow is inside our wrap)
+    pScreen->RealizeWindow = screenPriv->RealizeWindow;
+    result = pScreen->RealizeWindow(pWin);
+    pScreen->RealizeWindow = glAquaRealizeWindow;
+
+    // The Aqua window will already have been created (windows are
+    // realized from top down)
+
+    // Re-attach this window's GL contexts, if any.
+    glxPriv = __glXFindDrawablePrivate(pWin->drawable.id);
+    if (glxPriv) {
+        __GLXcontext *gx;
+        __GLcontext *gc;
+        __GLdrawablePrivate *glPriv = &glxPriv->glPriv;
+        GLAQUA_DEBUG_MSG("glAquaRealizeWindow is GL drawable!\n");
+
+        // GL contexts bound to this window for drawing
+        for (gx = glxPriv->drawGlxc; gx != NULL; gx = gx->next) {
+            gc = (__GLcontext *)gx->gc;
+            attach(gc, glPriv, glxPriv->xorigin, glxPriv->yorigin,
+                   glxPriv->width, glxPriv->height);
+        }
+
+        // GL contexts bound to this window for reading
+        for (gx = glxPriv->readGlxc; gx != NULL; gx = gx->next) {
+            gc = (__GLcontext *)gx->gc;
+            attach(gc, glPriv, glxPriv->xorigin, glxPriv->yorigin,
+                   glxPriv->width, glxPriv->height);
+        }
+    }
+
+    return result;
+}
+
+Bool
+glAquaUnrealizeWindow(WindowPtr pWin)
+{
+    // If this window has GL contexts, tell them to unattach
+    Bool result;
+    ScreenPtr pScreen = pWin->drawable.pScreen;
+    glAquaScreenRec *screenPriv = &glAquaScreens[pScreen->myNum];
+    __GLXdrawablePrivate *glxPriv;
+
+    GLAQUA_DEBUG_MSG("glAquaUnrealizeWindow\n");
+
+    // The Aqua window may have already been destroyed (windows
+    // are unrealized from top down)
+
+    // Unattach this window's GL contexts, if any.
+    glxPriv = __glXFindDrawablePrivate(pWin->drawable.id);
+    if (glxPriv) {
+        __GLXcontext *gx;
+        __GLcontext *gc;
+        GLAQUA_DEBUG_MSG("glAquaUnealizeWindow is GL drawable!\n");
+
+        // GL contexts bound to this window for drawing
+        for (gx = glxPriv->drawGlxc; gx != NULL; gx = gx->next) {
+            gc = (__GLcontext *)gx->gc;
+            attach(gc, NULL, 0, 0, 0, 0);
+        }
+
+        // GL contexts bound to this window for reading
+        for (gx = glxPriv->readGlxc; gx != NULL; gx = gx->next) {
+            gc = (__GLcontext *)gx->gc;
+            attach(gc, NULL, 0, 0, 0, 0);
+        }
+    }
+
+    pScreen->UnrealizeWindow = screenPriv->UnrealizeWindow;
+    result = pScreen->UnrealizeWindow(pWin);
+    pScreen->UnrealizeWindow = glAquaUnrealizeWindow;
+
+    return result;
+}
+
+
+
+
+
+
+/*
+ * In the case the driver has no GLX visuals we'll use these.
+ * [0] = RGB, double buffered
+ * [1] = RGB, double buffered, stencil, accum
+ */
+// Originally copied from Mesa
+
+static int                 numConfigs     = 0;
+static __GLXvisualConfig  *visualConfigs  = NULL;
+static void              **visualPrivates = NULL;
+
+#define NUM_FALLBACK_CONFIGS 2
+static __GLXvisualConfig FallbackConfigs[NUM_FALLBACK_CONFIGS] = {
+  {
+    -1,                 /* vid */
+    -1,                 /* class */
+    True,               /* rgba */
+    -1, -1, -1, 0,      /* rgba sizes */
+    -1, -1, -1, 0,      /* rgba masks */
+     0,  0,  0, 0,      /* rgba accum sizes */
+    True,               /* doubleBuffer */
+    False,              /* stereo */
+    -1,                 /* bufferSize */
+    16,                 /* depthSize */
+    0,                  /* stencilSize */
+    0,                  /* auxBuffers */
+    0,                  /* level */
+    GLX_NONE_EXT,       /* visualRating */
+    0,                  /* transparentPixel */
+    0, 0, 0, 0,         /* transparent rgba color (floats scaled to ints) */
+    0                   /* transparentIndex */
+  },
+  {
+    -1,                 /* vid */
+    -1,                 /* class */
+    True,               /* rgba */
+    -1, -1, -1, 0,      /* rgba sizes */
+    -1, -1, -1, 0,      /* rgba masks */
+    16, 16, 16, 0,      /* rgba accum sizes */
+    True,               /* doubleBuffer */
+    False,              /* stereo */
+    -1,                 /* bufferSize */
+    16,                 /* depthSize */
+    8,                  /* stencilSize */
+    0,                  /* auxBuffers */
+    0,                  /* level */
+    GLX_NONE_EXT,       /* visualRating */
+    0,                  /* transparentPixel */
+    0, 0, 0, 0,         /* transparent rgba color (floats scaled to ints) */
+    0                   /* transparentIndex */
+  }
+};
+
+
+
+static int count_bits(unsigned int n)
+{
+   int bits = 0;
+
+   while (n > 0) {
+      if (n & 1) bits++;
+      n >>= 1;
+   }
+   return bits;
+}
+
+
+// Mostly copied from Mesa's xf86glx.c
+static Bool init_visuals(int *nvisualp, VisualPtr *visualp,
+			 VisualID *defaultVisp,
+			 int ndepth, DepthPtr pdepth,
+			 int rootDepth)
+{
+    int numRGBconfigs;
+    int numCIconfigs;
+    int numVisuals = *nvisualp;
+    int numNewVisuals;
+    int numNewConfigs;
+    VisualPtr pVisual = *visualp;
+    VisualPtr pVisualNew = NULL;
+    VisualID *orig_vid = NULL;
+    __GLXvisualConfig *glXVisualPtr = NULL;
+    __GLXvisualConfig *pNewVisualConfigs = NULL;
+    void **glXVisualPriv;
+    void **pNewVisualPriv;
+    int found_default;
+    int i, j, k;
+
+    GLAQUA_DEBUG_MSG("init_visuals\n");
+
+    if (numConfigs > 0)
+        numNewConfigs = numConfigs;
+    else
+        numNewConfigs = NUM_FALLBACK_CONFIGS;
+
+    /* Alloc space for the list of new GLX visuals */
+    pNewVisualConfigs = (__GLXvisualConfig *)
+                     __glXMalloc(numNewConfigs * sizeof(__GLXvisualConfig));
+    if (!pNewVisualConfigs) {
+	return FALSE;
+    }
+
+    /* Alloc space for the list of new GLX visual privates */
+    pNewVisualPriv = (void **) __glXMalloc(numNewConfigs * sizeof(void *));
+    if (!pNewVisualPriv) {
+	__glXFree(pNewVisualConfigs);
+	return FALSE;
+    }
+
+    /*
+    ** If SetVisualConfigs was not called, then use default GLX
+    ** visual configs.
+    */
+    if (numConfigs == 0) {
+	memcpy(pNewVisualConfigs, FallbackConfigs,
+               NUM_FALLBACK_CONFIGS * sizeof(__GLXvisualConfig));
+	memset(pNewVisualPriv, 0, NUM_FALLBACK_CONFIGS * sizeof(void *));
+    }
+    else {
+        /* copy driver's visual config info */
+        for (i = 0; i < numConfigs; i++) {
+            pNewVisualConfigs[i] = visualConfigs[i];
+            pNewVisualPriv[i] = visualPrivates[i];
+        }
+    }
+
+    /* Count the number of RGB and CI visual configs */
+    numRGBconfigs = 0;
+    numCIconfigs = 0;
+    for (i = 0; i < numNewConfigs; i++) {
+	if (pNewVisualConfigs[i].rgba)
+	    numRGBconfigs++;
+	else
+	    numCIconfigs++;
+    }
+
+    /* Count the total number of visuals to compute */
+    numNewVisuals = 0;
+    for (i = 0; i < numVisuals; i++) {
+        numNewVisuals +=
+	    (pVisual[i].class == TrueColor || pVisual[i].class == DirectColor)
+	    ? numRGBconfigs : numCIconfigs;
+    }
+
+    /* Reset variables for use with the next screen/driver's visual configs */
+    visualConfigs = NULL;
+    numConfigs = 0;
+
+    /* Alloc temp space for the list of orig VisualIDs for each new visual */
+    orig_vid = (VisualID *)__glXMalloc(numNewVisuals * sizeof(VisualID));
+    if (!orig_vid) {
+	__glXFree(pNewVisualPriv);
+	__glXFree(pNewVisualConfigs);
+	return FALSE;
+    }
+
+    /* Alloc space for the list of glXVisuals */
+    glXVisualPtr = (__GLXvisualConfig *)__glXMalloc(numNewVisuals *
+						    sizeof(__GLXvisualConfig));
+    if (!glXVisualPtr) {
+	__glXFree(orig_vid);
+	__glXFree(pNewVisualPriv);
+	__glXFree(pNewVisualConfigs);
+	return FALSE;
+    }
+
+    /* Alloc space for the list of glXVisualPrivates */
+    glXVisualPriv = (void **)__glXMalloc(numNewVisuals * sizeof(void *));
+    if (!glXVisualPriv) {
+	__glXFree(glXVisualPtr);
+	__glXFree(orig_vid);
+	__glXFree(pNewVisualPriv);
+	__glXFree(pNewVisualConfigs);
+	return FALSE;
+    }
+
+    /* Alloc space for the new list of the X server's visuals */
+    pVisualNew = (VisualPtr)__glXMalloc(numNewVisuals * sizeof(VisualRec));
+    if (!pVisualNew) {
+	__glXFree(glXVisualPriv);
+	__glXFree(glXVisualPtr);
+	__glXFree(orig_vid);
+	__glXFree(pNewVisualPriv);
+	__glXFree(pNewVisualConfigs);
+	return FALSE;
+    }
+
+    /* Initialize the new visuals */
+    found_default = FALSE;
+    for (i = j = 0; i < numVisuals; i++) {
+        int is_rgb = (pVisual[i].class == TrueColor ||
+		      pVisual[i].class == DirectColor);
+
+	for (k = 0; k < numNewConfigs; k++) {
+	    if (pNewVisualConfigs[k].rgba != is_rgb)
+		continue;
+
+	    /* Initialize the new visual */
+	    pVisualNew[j] = pVisual[i];
+	    pVisualNew[j].vid = FakeClientID(0);
+
+	    /* Check for the default visual */
+	    if (!found_default && pVisual[i].vid == *defaultVisp) {
+		*defaultVisp = pVisualNew[j].vid;
+		found_default = TRUE;
+	    }
+
+	    /* Save the old VisualID */
+	    orig_vid[j] = pVisual[i].vid;
+
+	    /* Initialize the glXVisual */
+	    glXVisualPtr[j] = pNewVisualConfigs[k];
+	    glXVisualPtr[j].vid = pVisualNew[j].vid;
+
+	    /*
+	     * If the class is -1, then assume the X visual information
+	     * is identical to what GLX needs, and take them from the X
+	     * visual.  NOTE: if class != -1, then all other fields MUST
+	     * be initialized.
+	     */
+	    if (glXVisualPtr[j].class == -1) {
+		glXVisualPtr[j].class      = pVisual[i].class;
+		glXVisualPtr[j].redSize    = count_bits(pVisual[i].redMask);
+		glXVisualPtr[j].greenSize  = count_bits(pVisual[i].greenMask);
+		glXVisualPtr[j].blueSize   = count_bits(pVisual[i].blueMask);
+		glXVisualPtr[j].alphaSize  = glXVisualPtr[j].alphaSize;
+		glXVisualPtr[j].redMask    = pVisual[i].redMask;
+		glXVisualPtr[j].greenMask  = pVisual[i].greenMask;
+		glXVisualPtr[j].blueMask   = pVisual[i].blueMask;
+		glXVisualPtr[j].alphaMask  = glXVisualPtr[j].alphaMask;
+		glXVisualPtr[j].bufferSize = rootDepth;
+	    }
+
+	    /* Save the device-dependent private for this visual */
+	    glXVisualPriv[j] = pNewVisualPriv[k];
+
+	    j++;
+	}
+    }
+
+    assert(j <= numNewVisuals);
+
+    /* Save the GLX visuals in the screen structure */
+    glAquaScreens[screenInfo.numScreens-1].num_vis = numNewVisuals;
+    glAquaScreens[screenInfo.numScreens-1].glx_vis = glXVisualPtr;
+    glAquaScreens[screenInfo.numScreens-1].priv = glXVisualPriv;
+
+    /* Set up depth's VisualIDs */
+    for (i = 0; i < ndepth; i++) {
+	int numVids = 0;
+	VisualID *pVids = NULL;
+	int k, n = 0;
+
+	/* Count the new number of VisualIDs at this depth */
+	for (j = 0; j < pdepth[i].numVids; j++)
+	    for (k = 0; k < numNewVisuals; k++)
+		if (pdepth[i].vids[j] == orig_vid[k])
+		    numVids++;
+
+	/* Allocate a new list of VisualIDs for this depth */
+	pVids = (VisualID *)__glXMalloc(numVids * sizeof(VisualID));
+
+	/* Initialize the new list of VisualIDs for this depth */
+	for (j = 0; j < pdepth[i].numVids; j++)
+	    for (k = 0; k < numNewVisuals; k++)
+		if (pdepth[i].vids[j] == orig_vid[k])
+		    pVids[n++] = pVisualNew[k].vid;
+
+	/* Update this depth's list of VisualIDs */
+	__glXFree(pdepth[i].vids);
+	pdepth[i].vids = pVids;
+	pdepth[i].numVids = numVids;
+    }
+
+    /* Update the X server's visuals */
+    *nvisualp = numNewVisuals;
+    *visualp = pVisualNew;
+
+    /* Free the old list of the X server's visuals */
+    __glXFree(pVisual);
+
+    /* Clean up temporary allocations */
+    __glXFree(orig_vid);
+    __glXFree(pNewVisualPriv);
+    __glXFree(pNewVisualConfigs);
+
+    /* Free the private list created by DDX HW driver */
+    if (visualPrivates)
+        xfree(visualPrivates);
+    visualPrivates = NULL;
+
+    return TRUE;
+}
+
+// Copied from Mesa
+static void glAquaSetVisualConfigs(int nconfigs, __GLXvisualConfig *configs,
+				   void **privates)
+{
+    GLAQUA_DEBUG_MSG("glAquaSetVisualConfigs\n");
+
+    numConfigs = nconfigs;
+    visualConfigs = configs;
+    visualPrivates = privates;
+}
+
+// Copied from Mesa
+static Bool glAquaInitVisuals(VisualPtr *visualp, DepthPtr *depthp,
+			      int *nvisualp, int *ndepthp,
+			      int *rootDepthp, VisualID *defaultVisp,
+			      unsigned long sizes, int bitsPerRGB)
+{
+    GLAQUA_DEBUG_MSG("glAquaInitVisuals\n");
+
+    /*
+     * Setup the visuals supported by this particular screen.
+     */
+    return init_visuals(nvisualp, visualp, defaultVisp,
+			*ndepthp, *depthp, *rootDepthp);
+}
+
+
+static void fixup_visuals(int screen)
+{
+    ScreenPtr pScreen = screenInfo.screens[screen];
+    glAquaScreenRec *pScr = &glAquaScreens[screen];
+    __GLXvisualConfig *pGLXVis  = pScr->glx_vis;
+    VisualPtr pVis;
+    int i, j;
+
+    GLAQUA_DEBUG_MSG("fixup_visuals\n");
+
+    for (i = 0; i < pScr->num_vis; i++, pGLXVis++) {
+	pVis = pScreen->visuals;
+
+	/* Find a visual that matches the GLX visual's class and size */
+	for (j = 0; j < pScreen->numVisuals; j++, pVis++) {
+	    if (pVis->class == pGLXVis->class &&
+		pVis->nplanes == pGLXVis->bufferSize) {
+
+		/* Fixup the masks */
+		pGLXVis->redMask   = pVis->redMask;
+		pGLXVis->greenMask = pVis->greenMask;
+		pGLXVis->blueMask  = pVis->blueMask;
+
+		/* Recalc the sizes */
+		pGLXVis->redSize   = count_bits(pGLXVis->redMask);
+		pGLXVis->greenSize = count_bits(pGLXVis->greenMask);
+		pGLXVis->blueSize  = count_bits(pGLXVis->blueMask);
+	    }
+	}
+    }
+}
+
+static void init_screen_visuals(int screen)
+{
+    ScreenPtr pScreen = screenInfo.screens[screen];
+    __GLXvisualConfig *pGLXVis = glAquaScreens[screen].glx_vis;
+    // XMesaVisual *pXMesaVisual;
+    VisualPtr pVis;
+    int *used;
+    int i, j;
+
+    GLAQUA_DEBUG_MSG("init_screen_visuals\n");
+
+    /* Alloc space for the list of XMesa visuals */
+    // pXMesaVisual = (XMesaVisual *)__glXMalloc(MESAScreens[screen].num_vis *
+    //					      sizeof(XMesaVisual));
+    // __glXMemset(pXMesaVisual, 0,
+    //		MESAScreens[screen].num_vis * sizeof(XMesaVisual));
+
+    used = (int *)__glXMalloc(pScreen->numVisuals * sizeof(int));
+    __glXMemset(used, 0, pScreen->numVisuals * sizeof(int));
+
+    for (i = 0; i < glAquaScreens[screen].num_vis; i++, pGLXVis++) {
+	pVis = pScreen->visuals;
+	for (j = 0; j < pScreen->numVisuals; j++, pVis++) {
+
+	    if (pVis->class == pGLXVis->class &&
+		pVis->nplanes == pGLXVis->bufferSize &&
+		!used[j]) {
+
+		if (pVis->redMask   == pGLXVis->redMask &&
+		    pVis->greenMask == pGLXVis->greenMask &&
+		    pVis->blueMask  == pGLXVis->blueMask) {
+
+		    /* Create the XMesa visual */
+		    /*
+		    pXMesaVisual[i] =
+                         XMesaCreateVisual(pScreen,
+					   pVis,
+					   pGLXVis->rgba,
+					   (pGLXVis->alphaSize > 0),
+					   pGLXVis->doubleBuffer,
+					   pGLXVis->stereo,
+					   GL_TRUE, // ximage_flag
+					   pGLXVis->depthSize,
+					   pGLXVis->stencilSize,
+					   pGLXVis->accumRedSize,
+					   pGLXVis->accumGreenSize,
+					   pGLXVis->accumBlueSize,
+					   pGLXVis->accumAlphaSize,
+                                           0,  // numSamples
+					   pGLXVis->level,
+                                           pGLXVis->visualRating );
+		    */
+		    /* Set the VisualID */
+		    pGLXVis->vid = pVis->vid;
+
+		    /* Mark this visual used */
+		    used[j] = 1;
+		    break;
+		}
+	    }
+	}
+    }
+
+    __glXFree(used);
+
+    // glAquaScreens[screen].xm_vis = pXMesaVisual;
+}
+
+static Bool glAquaScreenProbe(int screen)
+{
+    ScreenPtr pScreen;
+    glAquaScreenRec *screenPriv;
+
+    GLAQUA_DEBUG_MSG("glAquaScreenProbe\n");
+
+    /*
+     * Set up the current screen's visuals.
+     */
+    __glDDXScreenInfo.pGlxVisual = glAquaScreens[screen].glx_vis;
+    __glDDXScreenInfo.pVisualPriv = glAquaScreens[screen].priv;
+    __glDDXScreenInfo.numVisuals =
+	__glDDXScreenInfo.numUsableVisuals = glAquaScreens[screen].num_vis;
+
+    /*
+     * Set the current screen's createContext routine.  This could be
+     * wrapped by a DDX GLX context creation routine.
+     */
+    __glDDXScreenInfo.createContext = glAquaCreateContext;
+
+    /*
+     * The ordering of the rgb compenents might have been changed by the
+     * driver after mi initialized them.
+     */
+    fixup_visuals(screen);
+
+    /*
+     * Find the GLX visuals that are supported by this screen and create
+     * XMesa's visuals.
+     */
+    init_screen_visuals(screen);
+
+    // Wrap RealizeWindow and UnrealizeWindow on this screen
+    pScreen = screenInfo.screens[screen];
+    screenPriv = &glAquaScreens[screen];
+    screenPriv->RealizeWindow = pScreen->RealizeWindow;
+    pScreen->RealizeWindow = glAquaRealizeWindow;
+    screenPriv->UnrealizeWindow = pScreen->UnrealizeWindow;
+    pScreen->UnrealizeWindow = glAquaUnrealizeWindow;
+
+    return TRUE;
+}
+
+
+static GLboolean glAquaResizeBuffers(__GLdrawableBuffer *buffer,
+				     GLint x, GLint y,
+				     GLuint width, GLuint height,
+				     __GLdrawablePrivate *glPriv,
+				     GLuint bufferMask)
+{
+    GLAquaDrawableRec *aquaPriv = (GLAquaDrawableRec *)glPriv->private;
+    __GLXcontext *gx;
+    __GLcontext *gc;
+    __GLXdrawablePrivate *glxPriv = (__GLXdrawablePrivate *)glPriv->other;
+
+    GLAQUA_DEBUG_MSG("glAquaResizeBuffers to (%d %d %d %d)\n", x, y, width, height);
+
+    // update all contexts that point at this drawable for drawing (hack?)
+    for (gx = glxPriv->drawGlxc; gx != NULL; gx = gx->next) {
+        gc = (__GLcontext *)gx->gc;
+        attach(gc, glPriv, x, y, width, height);
+    }
+
+    // update all contexts that point at this drawable for reading (hack?)
+    for (gx = glxPriv->readGlxc; gx != NULL; gx = gx->next) {
+        gc = (__GLcontext *)gx->gc;
+        attach(gc, glPriv, x, y, width, height);
+    }
+
+    return aquaPriv->resize(buffer, x, y, width, height, glPriv, bufferMask);
+}
+
+
+static GLboolean glAquaSwapBuffers(__GLXdrawablePrivate *glxPriv)
+{
+    // fixme AGL software renderer will use properties of current QD port (bad)
+
+    // swap buffers on only *one* of the contexts
+    // (e.g. the last one for drawing)
+    __GLcontext *gc = (__GLcontext *)glxPriv->drawGlxc->gc;
+    if (gc && gc->ctx) aglSwapBuffers(gc->ctx);
+
+    return GL_TRUE;
+}
+
+static void glAquaDestroyDrawablePrivate(__GLdrawablePrivate *glPriv)
+{
+    GLAQUA_DEBUG_MSG("glAquaDestroyDrawablePrivate\n");
+
+    free(glPriv->private);
+    glPriv->private = NULL;
+}
+
+static void glAquaCreateBuffer(__GLXdrawablePrivate *glxPriv)
+{
+    GLAquaDrawableRec *aquaPriv = malloc(sizeof(GLAquaDrawableRec));
+    __GLdrawablePrivate *glPriv = &glxPriv->glPriv;
+
+    GLAQUA_DEBUG_MSG("glAquaCreateBuffer\n");
+
+    // replace swapBuffers (original is never called)
+    glxPriv->swapBuffers = glAquaSwapBuffers;
+
+    // wrap front buffer resize
+    aquaPriv->resize = glPriv->frontBuffer.resize;
+    glPriv->frontBuffer.resize = glAquaResizeBuffers;
+
+    // stash private data
+    glPriv->private = aquaPriv;
+    glPriv->freePrivate = glAquaDestroyDrawablePrivate;
+}
+
+
+static void glAquaResetExtension(void)
+{
+    GLAQUA_DEBUG_MSG("glAquaResetExtension\n");
+    aglResetLibrary();
+}
+
+
+
+// Extra goodies for glx
+
+GLint __glEvalComputeK(GLenum target)
+{
+    switch (target) {
+    case GL_MAP1_VERTEX_4:
+    case GL_MAP1_COLOR_4:
+    case GL_MAP1_TEXTURE_COORD_4:
+    case GL_MAP2_VERTEX_4:
+    case GL_MAP2_COLOR_4:
+    case GL_MAP2_TEXTURE_COORD_4:
+	return 4;
+    case GL_MAP1_VERTEX_3:
+    case GL_MAP1_TEXTURE_COORD_3:
+    case GL_MAP1_NORMAL:
+    case GL_MAP2_VERTEX_3:
+    case GL_MAP2_TEXTURE_COORD_3:
+    case GL_MAP2_NORMAL:
+	return 3;
+    case GL_MAP1_TEXTURE_COORD_2:
+    case GL_MAP2_TEXTURE_COORD_2:
+	return 2;
+    case GL_MAP1_TEXTURE_COORD_1:
+    case GL_MAP2_TEXTURE_COORD_1:
+    case GL_MAP1_INDEX:
+    case GL_MAP2_INDEX:
+	return 1;
+    default:
+	return 0;
+    }
+}
+
+GLuint __glFloorLog2(GLuint val)
+{
+    int c = 0;
+
+    while (val > 1) {
+	c++;
+	val >>= 1;
+    }
+    return c;
+}