Migrating to new directory structure adopted from the RealVNC's source tree. More changes will follow.
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@589 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/hextileEncode.h b/common/rfb/hextileEncode.h
new file mode 100644
index 0000000..9f8bd55
--- /dev/null
+++ b/common/rfb/hextileEncode.h
@@ -0,0 +1,229 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved.
+ * Copyright (C) 2005 Constantin Kaplinsky. All Rights Reserved.
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+//
+// Hextile encoding function.
+//
+// This file is #included after having set the following macros:
+// BPP - 8, 16 or 32
+// EXTRA_ARGS - optional extra arguments
+// GET_IMAGE_INTO_BUF - gets a rectangle of pixel data into a buffer
+
+#include <rdr/OutStream.h>
+#include <rfb/hextileConstants.h>
+
+namespace rfb {
+
+// CONCAT2E concatenates its arguments, expanding them if they are macros
+
+#ifndef CONCAT2E
+#define CONCAT2(a,b) a##b
+#define CONCAT2E(a,b) CONCAT2(a,b)
+#endif
+
+#define PIXEL_T rdr::CONCAT2E(U,BPP)
+#define WRITE_PIXEL CONCAT2E(writeOpaque,BPP)
+#define HEXTILE_ENCODE CONCAT2E(hextileEncode,BPP)
+#define HEXTILE_ENCODE_TILE CONCAT2E(hextileEncodeTile,BPP)
+#define TEST_TILE_TYPE CONCAT2E(hextileTestTileType,BPP)
+
+int TEST_TILE_TYPE (PIXEL_T* data, int w, int h, PIXEL_T* bg, PIXEL_T* fg);
+int HEXTILE_ENCODE_TILE (PIXEL_T* data, int w, int h, int tileType,
+ rdr::U8* encoded, PIXEL_T bg);
+
+void HEXTILE_ENCODE(const Rect& r, rdr::OutStream* os
+#ifdef EXTRA_ARGS
+ , EXTRA_ARGS
+#endif
+ )
+{
+ Rect t;
+ PIXEL_T buf[256];
+ PIXEL_T oldBg = 0, oldFg = 0;
+ bool oldBgValid = false;
+ bool oldFgValid = false;
+ rdr::U8 encoded[256*(BPP/8)];
+
+ for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
+
+ t.br.y = __rfbmin(r.br.y, t.tl.y + 16);
+
+ for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
+
+ t.br.x = __rfbmin(r.br.x, t.tl.x + 16);
+
+ GET_IMAGE_INTO_BUF(t,buf);
+
+ PIXEL_T bg, fg;
+ int tileType = TEST_TILE_TYPE(buf, t.width(), t.height(), &bg, &fg);
+
+ if (!oldBgValid || oldBg != bg) {
+ tileType |= hextileBgSpecified;
+ oldBg = bg;
+ oldBgValid = true;
+ }
+
+ int encodedLen = 0;
+
+ if (tileType & hextileAnySubrects) {
+
+ if (tileType & hextileSubrectsColoured) {
+ oldFgValid = false;
+ } else {
+ if (!oldFgValid || oldFg != fg) {
+ tileType |= hextileFgSpecified;
+ oldFg = fg;
+ oldFgValid = true;
+ }
+ }
+
+ encodedLen = HEXTILE_ENCODE_TILE(buf, t.width(), t.height(), tileType,
+ encoded, bg);
+
+ if (encodedLen < 0) {
+ GET_IMAGE_INTO_BUF(t,buf);
+ os->writeU8(hextileRaw);
+ os->writeBytes(buf, t.width() * t.height() * (BPP/8));
+ oldBgValid = oldFgValid = false;
+ continue;
+ }
+ }
+
+ os->writeU8(tileType);
+ if (tileType & hextileBgSpecified) os->WRITE_PIXEL(bg);
+ if (tileType & hextileFgSpecified) os->WRITE_PIXEL(fg);
+ if (tileType & hextileAnySubrects) os->writeBytes(encoded, encodedLen);
+ }
+ }
+}
+
+
+int HEXTILE_ENCODE_TILE (PIXEL_T* data, int w, int h, int tileType,
+ rdr::U8* encoded, PIXEL_T bg)
+{
+ rdr::U8* nSubrectsPtr = encoded;
+ *nSubrectsPtr = 0;
+ encoded++;
+
+ for (int y = 0; y < h; y++)
+ {
+ int x = 0;
+ while (x < w) {
+ if (*data == bg) {
+ x++;
+ data++;
+ continue;
+ }
+
+ // Find horizontal subrect first
+ PIXEL_T* ptr = data+1;
+ PIXEL_T* eol = data+w-x;
+ while (ptr < eol && *ptr == *data) ptr++;
+ int sw = ptr - data;
+
+ ptr = data + w;
+ int sh = 1;
+ while (sh < h-y) {
+ eol = ptr + sw;
+ while (ptr < eol)
+ if (*ptr++ != *data) goto endOfSubrect;
+ ptr += w - sw;
+ sh++;
+ }
+ endOfSubrect:
+
+ (*nSubrectsPtr)++;
+
+ if (tileType & hextileSubrectsColoured) {
+ if (encoded - nSubrectsPtr + (BPP/8) > w*h*(BPP/8)) return -1;
+#if (BPP == 8)
+ *encoded++ = *data;
+#elif (BPP == 16)
+ *encoded++ = ((rdr::U8*)data)[0];
+ *encoded++ = ((rdr::U8*)data)[1];
+#elif (BPP == 32)
+ *encoded++ = ((rdr::U8*)data)[0];
+ *encoded++ = ((rdr::U8*)data)[1];
+ *encoded++ = ((rdr::U8*)data)[2];
+ *encoded++ = ((rdr::U8*)data)[3];
+#endif
+ }
+
+ if (encoded - nSubrectsPtr + 2 > w*h*(BPP/8)) return -1;
+ *encoded++ = (x << 4) | y;
+ *encoded++ = ((sw-1) << 4) | (sh-1);
+
+ ptr = data+w;
+ PIXEL_T* eor = data+w*sh;
+ while (ptr < eor) {
+ eol = ptr + sw;
+ while (ptr < eol) *ptr++ = bg;
+ ptr += w - sw;
+ }
+ x += sw;
+ data += sw;
+ }
+ }
+ return encoded - nSubrectsPtr;
+}
+
+
+int TEST_TILE_TYPE (PIXEL_T* data, int w, int h, PIXEL_T* bg, PIXEL_T* fg)
+{
+ PIXEL_T pix1 = *data;
+ PIXEL_T* end = data + w * h;
+
+ PIXEL_T* ptr = data + 1;
+ while (ptr < end && *ptr == pix1)
+ ptr++;
+
+ if (ptr == end) {
+ *bg = pix1;
+ return 0; // solid-color tile
+ }
+
+ int count1 = ptr - data;
+ int count2 = 1;
+ PIXEL_T pix2 = *ptr++;
+ int tileType = hextileAnySubrects;
+
+ for (; ptr < end; ptr++) {
+ if (*ptr == pix1) {
+ count1++;
+ } else if (*ptr == pix2) {
+ count2++;
+ } else {
+ tileType |= hextileSubrectsColoured;
+ break;
+ }
+ }
+
+ if (count1 >= count2) {
+ *bg = pix1; *fg = pix2;
+ } else {
+ *bg = pix2; *fg = pix1;
+ }
+ return tileType;
+}
+
+#undef PIXEL_T
+#undef WRITE_PIXEL
+#undef HEXTILE_ENCODE
+#undef HEXTILE_ENCODE_TILE
+#undef TEST_TILE_TYPE
+}