VNC: Add VNC server to M5

1 files changed, 139 insertions, 0 deletions

diff --git a/src/base/vnc/convert.cc b/src/base/vnc/convert.cc
new file mode 100644
index 000000000..ea7a9b1c5
--- /dev/null
+++ b/src/base/vnc/convert.cc
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+/*
+ * Copyright (c) 2011 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ali Saidi
+ *          William Wang
+ */
+
+#include <cassert>
+
+#include "base/misc.hh"
+#include "base/vnc/convert.hh"
+
+/** @file
+ * This file provides conversion functions for a variety of video modes
+ */
+
+VideoConvert::VideoConvert(Mode input_mode, Mode output_mode, int _width,
+        int _height)
+    : inputMode(input_mode), outputMode(output_mode), width(_width),
+    height(_height)
+{
+    if (inputMode != bgr565 && inputMode != rgb565 && inputMode != bgr8888)
+        fatal("Only support converting from bgr565, rdb565, and bgr8888\n");
+
+    if (outputMode != rgb8888)
+        fatal("Only support converting to rgb8888\n");
+
+    assert(0 < height && height < 4000);
+    assert(0 < width && width < 4000);
+}
+
+VideoConvert::~VideoConvert()
+{
+}
+
+uint8_t*
+VideoConvert::convert(uint8_t *fb)
+{
+    switch (inputMode) {
+      case bgr565:
+        return m565rgb8888(fb, true);
+      case rgb565:
+        return m565rgb8888(fb, false);
+      case bgr8888:
+        return bgr8888rgb8888(fb);
+      default:
+        panic("Unimplemented Mode\n");
+    }
+}
+
+uint8_t*
+VideoConvert::m565rgb8888(uint8_t *fb, bool bgr)
+{
+    uint8_t *out = new uint8_t[area() * sizeof(uint32_t)];
+    uint32_t *out32 = (uint32_t*)out;
+
+    uint16_t *in16 = (uint16_t*)fb;
+
+    for (int x = 0; x < area(); x++) {
+        Bgr565 inpx;
+        Rgb8888 outpx = 0;
+
+        inpx = in16[x];
+
+        if (bgr) {
+            outpx.red = inpx.blue << 3;
+            outpx.green = inpx.green << 2;
+            outpx.blue = inpx.red << 3;
+        } else {
+            outpx.blue = inpx.blue << 3;
+            outpx.green = inpx.green << 2;
+            outpx.red = inpx.red << 3;
+        }
+
+        out32[x] = outpx;
+    }
+
+    return out;
+}
+
+
+uint8_t*
+VideoConvert::bgr8888rgb8888(uint8_t *fb)
+{
+    uint8_t *out = new uint8_t[area() * sizeof(uint32_t)];
+    uint32_t *out32 = (uint32_t*)out;
+
+    uint32_t *in32 = (uint32_t*)fb;
+
+    for (int x = 0; x < area(); x++) {
+        Rgb8888 outpx = 0;
+        Bgr8888 inpx;
+
+
+        inpx = in32[x];
+
+        outpx.red = inpx.blue;
+        outpx.green = inpx.green;
+        outpx.blue = inpx.red;
+
+        out32[x] = outpx;
+    }
+
+    return out;
+}
+