--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/native/sun/java2d/pipe/BufferedRenderPipe.c	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2005-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+#include <jni.h>
+#include <jlong.h>
+#include <jni_util.h>
+#include "sun_java2d_pipe_BufferedRenderPipe.h"
+#include "sun_java2d_pipe_BufferedOpCodes.h"
+#include "SpanIterator.h"
+#include "Trace.h"
+
+/* The "header" consists of a jint opcode and a jint span count value */
+#define INTS_PER_HEADER  2
+#define BYTES_PER_HEADER 8
+
+#define BYTES_PER_SPAN sun_java2d_pipe_BufferedRenderPipe_BYTES_PER_SPAN
+
+JNIEXPORT jint JNICALL
+Java_sun_java2d_pipe_BufferedRenderPipe_fillSpans
+    (JNIEnv *env, jobject pipe,
+     jobject rq, jlong buf,
+     jint bpos, jint limit,
+     jobject si, jlong pIterator,
+     jint transx, jint transy)
+{
+    SpanIteratorFuncs *pFuncs = (SpanIteratorFuncs *)jlong_to_ptr(pIterator);
+    void *srData;
+    jint spanbox[4];
+    jint spanCount = 0;
+    jint remainingBytes, remainingSpans;
+    unsigned char *bbuf;
+    jint *ibuf;
+    jint ipos;
+
+    J2dTraceLn2(J2D_TRACE_INFO,
+                "BufferedRenderPipe_fillSpans: bpos=%d limit=%d",
+                bpos, limit);
+
+    if (JNU_IsNull(env, rq)) {
+        J2dRlsTraceLn(J2D_TRACE_ERROR,
+            "BufferedRenderPipe_fillSpans: rq is null");
+        return bpos;
+    }
+
+    if (JNU_IsNull(env, si)) {
+        J2dRlsTraceLn(J2D_TRACE_ERROR,
+            "BufferedRenderPipe_fillSpans: span iterator is null");
+        return bpos;
+    }
+
+    if (pFuncs == NULL) {
+        J2dRlsTraceLn(J2D_TRACE_ERROR,
+            "BufferedRenderPipe_fillSpans: native iterator not supplied");
+        return bpos;
+    }
+
+    bbuf = (unsigned char *)jlong_to_ptr(buf);
+    if (bbuf == NULL) {
+        J2dRlsTraceLn(J2D_TRACE_ERROR,
+            "BufferedRenderPipe_fillSpans: cannot get direct buffer address");
+        return bpos;
+    }
+
+    // adjust the int pointer to the current buffer position
+    ibuf = (jint *)(bbuf + bpos);
+
+    // start new operation
+    ibuf[0] = sun_java2d_pipe_BufferedOpCodes_FILL_SPANS;
+    ibuf[1] = 0; // placeholder for the span count
+
+    // skip the opcode and span count
+    ipos = INTS_PER_HEADER;
+    bpos += BYTES_PER_HEADER; // skip the opcode and span count
+
+    remainingBytes = limit - bpos;
+    remainingSpans = remainingBytes / BYTES_PER_SPAN;
+
+    srData = (*pFuncs->open)(env, si);
+    while ((*pFuncs->nextSpan)(srData, spanbox)) {
+        if (remainingSpans == 0) {
+            // fill in span count
+            ibuf[1] = spanCount;
+
+            // flush the queue
+            JNU_CallMethodByName(env, NULL, rq, "flushNow", "(I)V", bpos);
+
+            // now start a new operation
+            ibuf = (jint *)bbuf;
+            ibuf[0] = sun_java2d_pipe_BufferedOpCodes_FILL_SPANS;
+            ibuf[1] = 0; // placeholder for the span count
+
+            // skip the opcode and span count
+            ipos = INTS_PER_HEADER;
+            bpos = BYTES_PER_HEADER;
+
+            // calculate new limits
+            remainingBytes = limit - bpos;
+            remainingSpans = remainingBytes / BYTES_PER_SPAN;
+            spanCount = 0;
+        }
+
+        // enqueue span
+        ibuf[ipos++] = spanbox[0] + transx; // x1
+        ibuf[ipos++] = spanbox[1] + transy; // y1
+        ibuf[ipos++] = spanbox[2] + transx; // x2
+        ibuf[ipos++] = spanbox[3] + transy; // y2
+
+        // update positions
+        bpos += BYTES_PER_SPAN;
+        spanCount++;
+        remainingSpans--;
+    }
+    (*pFuncs->close)(env, srData);
+
+    // fill in span count
+    ibuf[1] = spanCount;
+
+    // return the current byte position
+    return bpos;
+}