From 3169843ccd596c63751cd51297d7fec4da1c2020 Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@redhat.com>
Date: Fri, 26 May 2017 15:28:05 -0400
Subject: wip: wire up si backend for vfb

---
 glx/glxext.c       | 132 +++++++++++++++++++++++++++++++----------------------
 hw/vfb/meson.build |   1 +
 2 files changed, 78 insertions(+), 55 deletions(-)

diff --git a/glx/glxext.c b/glx/glxext.c
index 2eb596cdb..f872b2ebe 100644
--- a/glx/glxext.c
+++ b/glx/glxext.c
@@ -46,6 +46,7 @@
 #include "glxext.h"
 #include "indirect_table.h"
 #include "indirect_util.h"
+#include "glxfe.h"
 
 /*
 ** X resources.
@@ -60,7 +61,6 @@ static DevPrivateKeyRec glxClientPrivateKeyRec;
 /*
 ** Forward declarations.
 */
-static int __glXDispatch(ClientPtr);
 static GLboolean __glXFreeContext(__GLXcontext * cx);
 
 /*
@@ -223,18 +223,16 @@ __glXErrorOccured(void)
     return errorOccured;
 }
 
-static ExtensionEntry *GLXExtensionEntry;
-
 int
 __glXError(int error)
 {
-    return GLXExtensionEntry->errorBase + error;
+    return GlxExtension->errorBase + error;
 }
 
 int
 __glXEvent(int event)
 {
-    return GLXExtensionEntry->eventBase + event;
+    return GlxExtension->eventBase + event;
 }
 
 __GLXclientState *
@@ -322,13 +320,80 @@ GetGLXDrawableBytes(void *value, XID id, ResourceSizePtr size)
     }
 }
 
+/* "sample implementation" */
+static int
+siGlxDispatch(ClientPtr client)
+{
+    REQUEST(xGLXSingleReq);
+    CARD8 opcode;
+    __GLXdispatchSingleProcPtr proc;
+    __GLXclientState *cl;
+    int retval;
+
+    opcode = stuff->glxCode;
+    cl = glxGetClient(client);
+
+    /*
+     ** Use the opcode to index into the procedure table.
+     */
+    proc = __glXGetProtocolDecodeFunction(&Single_dispatch_info, opcode,
+                                          client->swapped);
+    if (proc != NULL) {
+        retval = (*proc) (cl, (GLbyte *) stuff);
+    }
+    else {
+        retval = BadRequest;
+    }
+
+    return retval;
+}
+
+static const GlxBackend siGlxBackend = {
+    /* Dispatched to every backend */
+    .ClientInfo = siGlxDispatch,
+    .SetClientInfoARB = siGlxDispatch,
+    .SetClientInfo2ARB = siGlxDispatch,
+
+    /* Dispatched to one backend */
+    .Render = siGlxDispatch,
+    .RenderLarge = siGlxDispatch,
+    .CreateContext = siGlxDispatch,
+    .DestroyContext = siGlxDispatch,
+    .MakeCurrent = siGlxDispatch,
+    .IsDirect = siGlxDispatch,
+    .WaitGL = siGlxDispatch,
+    .WaitX = siGlxDispatch,
+    .CopyContext = siGlxDispatch,
+    .SwapBuffers = siGlxDispatch,
+    .UseXFont = siGlxDispatch,
+    .CreateGLXPixmap = siGlxDispatch,
+    .GetVisualConfigs = siGlxDispatch,
+    .DestroyGLXPixmap = siGlxDispatch,
+    .VendorPrivate = siGlxDispatch,
+    .QueryExtensionsString = siGlxDispatch,
+    .QueryServerString = siGlxDispatch,
+    .GetFBConfigs = siGlxDispatch,
+    .CreatePixmap = siGlxDispatch,
+    .DestroyPixmap = siGlxDispatch,
+    .CreateNewContext = siGlxDispatch,
+    .QueryContext = siGlxDispatch,
+    .MakeContextCurrent = siGlxDispatch,
+    .CreatePbuffer = siGlxDispatch,
+    .DestroyPbuffer = siGlxDispatch,
+    .GetDrawableAttributes = siGlxDispatch,
+    .ChangeDrawableAttributes = siGlxDispatch,
+    .CreateWindow = siGlxDispatch,
+    .DestroyWindow = siGlxDispatch,
+    .CreateContextAttribsARB = siGlxDispatch,
+    .Single = siGlxDispatch,
+};
+
 /*
 ** Initialize the GLX extension.
 */
 void
-GlxExtensionInit(void)
+GlxBackendInit(void)
 {
-    ExtensionEntry *extEntry;
     ScreenPtr pScreen;
     int i;
     __GLXprovider *p, **stack;
@@ -367,12 +432,12 @@ GlxExtensionInit(void)
 
             glxScreen = p->screenProbe(pScreen);
             if (glxScreen != NULL) {
+                GlxSetBackend(pScreen, &siGlxBackend);
                 LogMessage(X_INFO,
                            "GLX: Initialized %s GL provider for screen %d\n",
                            p->name, i);
                 break;
             }
-
         }
 
         if (!p)
@@ -382,25 +447,12 @@ GlxExtensionInit(void)
             glx_provided = True;
     }
 
-    /* don't register extension if GL is not provided on any screen */
-    if (!glx_provided)
-        return;
-
-    /*
-     ** Add extension to server extensions.
-     */
-    extEntry = AddExtension(GLX_EXTENSION_NAME, __GLX_NUMBER_EVENTS,
-                            __GLX_NUMBER_ERRORS, __glXDispatch,
-                            __glXDispatch, ResetExtension, StandardMinorOpcode);
-    if (!extEntry) {
-        FatalError("__glXExtensionInit: AddExtensions failed\n");
-        return;
-    }
-
-    GLXExtensionEntry = extEntry;
+    /* don't register hooks if GL is not provided on any screen */
+    if (glx_provided) {
 #if PRESENT
-    __glXregisterPresentCompleteNotify();
+        __glXregisterPresentCompleteNotify();
 #endif
+    }
 }
 
 /************************************************************************/
@@ -480,33 +532,3 @@ void *__glGetProcAddress(const char *proc)
 
     return ret ? ret : (void *) NoopDDA;
 }
-
-/*
-** Top level dispatcher; all commands are executed from here down.
-*/
-static int
-__glXDispatch(ClientPtr client)
-{
-    REQUEST(xGLXSingleReq);
-    CARD8 opcode;
-    __GLXdispatchSingleProcPtr proc;
-    __GLXclientState *cl;
-    int retval;
-
-    opcode = stuff->glxCode;
-    cl = glxGetClient(client);
-
-    /*
-     ** Use the opcode to index into the procedure table.
-     */
-    proc = __glXGetProtocolDecodeFunction(&Single_dispatch_info, opcode,
-                                          client->swapped);
-    if (proc != NULL) {
-        retval = (*proc) (cl, (GLbyte *) stuff);
-    }
-    else {
-        retval = BadRequest;
-    }
-
-    return retval;
-}
diff --git a/hw/vfb/meson.build b/hw/vfb/meson.build
index 6566b4590..c796fe7c5 100644
--- a/hw/vfb/meson.build
+++ b/hw/vfb/meson.build
@@ -15,6 +15,7 @@ executable(
         libxserver,
         libxserver_xkb_stubs,
         libxserver_xi_stubs,
+        libglxfe,
         libxserver_glx
     ],
     install: true,
-- 
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