1 files changed, 151 insertions, 0 deletions
diff --git a/xserver/miext/rootless/accel/rlAccel.c b/xserver/miext/rootless/accel/rlAccel.c
new file mode 100644
index 000000000..d62bee740
--- /dev/null
+++ b/xserver/miext/rootless/accel/rlAccel.c
@@ -0,0 +1,151 @@
+/*
+ * Support for accelerated rootless code
+ */
+/*
+ * Copyright (c) 2004 Torrey T. Lyons. 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.
+ */
+
+/*
+ * The accelerated rootless code replaces some GC operations from fb with
+ * versions that call the rootless acceleration functions where appropriate.
+ * To work properly, this must be wrapped directly on top of fb. Nothing
+ * underneath this layer besides fb will get called.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "rootless.h"
+#include "rlAccel.h"
+
+typedef struct _rlAccelScreenRec {
+    CreateGCProcPtr CreateGC;
+    CloseScreenProcPtr CloseScreen;
+} rlAccelScreenRec, *rlAccelScreenPtr;
+
+static int rlAccelScreenPrivateIndex = -1;
+
+#define RLACCELREC(pScreen) \
+   ((rlAccelScreenRec *)(pScreen)->devPrivates[rlAccelScreenPrivateIndex].ptr)
+
+/* This is mostly identical to fbGCOps. */
+static GCOps rlAccelOps = {
+    rlFillSpans,
+    fbSetSpans,
+    fbPutImage,
+    rlCopyArea,
+    fbCopyPlane,
+    fbPolyPoint,
+    fbPolyLine,
+    fbPolySegment,
+    fbPolyRectangle,
+    fbPolyArc,
+    miFillPolygon,
+    rlPolyFillRect,
+    fbPolyFillArc,
+    miPolyText8,
+    miPolyText16,
+    miImageText8,
+    miImageText16,
+    rlImageGlyphBlt,
+    fbPolyGlyphBlt,
+    fbPushPixels
+};
+
+
+/*
+ * Screen function to create a graphics context
+ */
+static Bool
+rlCreateGC(GCPtr pGC)
+{
+    ScreenPtr pScreen = pGC->pScreen;
+    rlAccelScreenRec *s = RLACCELREC(pScreen);
+    Bool result;
+
+    // Unwrap and call
+    pScreen->CreateGC = s->CreateGC;
+    result = s->CreateGC(pGC);
+
+    // Accelerated GC ops replace some fb GC ops
+    pGC->ops = &rlAccelOps;
+
+    // Rewrap
+    s->CreateGC = pScreen->CreateGC;
+    pScreen->CreateGC = rlCreateGC;
+
+    return result;
+}
+
+
+/*
+ * Clean up when closing a screen on server reset
+ */
+static Bool
+rlCloseScreen (int iScreen, ScreenPtr pScreen)
+{
+    rlAccelScreenRec *s = RLACCELREC(pScreen);
+    Bool result;
+
+    // Unwrap
+    pScreen->CloseScreen = s->CloseScreen;
+    result = pScreen->CloseScreen(iScreen, pScreen);
+
+    xfree(s);
+
+    return result;
+}
+
+
+/*
+ * RootlessAccelInit
+ *  Called by the rootless implementation to initialize accelerated
+ *  rootless drawing.
+ */
+Bool
+RootlessAccelInit(ScreenPtr pScreen)
+{
+    static unsigned long rlAccelGeneration = 0;
+    rlAccelScreenRec *s;
+
+    if (rlAccelGeneration != serverGeneration) {
+        rlAccelScreenPrivateIndex = AllocateScreenPrivateIndex();
+        if (rlAccelScreenPrivateIndex == -1) return FALSE;
+        rlAccelGeneration = serverGeneration;
+    }
+
+    s = xalloc(sizeof(rlAccelScreenRec));
+    if (!s) return FALSE;
+    RLACCELREC(pScreen) = s;
+
+    // Wrap the screen functions we need
+    s->CreateGC = pScreen->CreateGC;
+    pScreen->CreateGC = rlCreateGC;
+    s->CloseScreen = pScreen->CloseScreen;
+    pScreen->CloseScreen = rlCloseScreen;
+
+    return TRUE;
+}