mirror of
https://github.com/TigerVNC/tigervnc.git
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47ed8d321c
git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@2 3789f03b-4d11-0410-bbf8-ca57d06f2519
127 lines
3.3 KiB
C++
127 lines
3.3 KiB
C++
/* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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//
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// Hextile decoding function.
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//
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// This file is #included after having set the following macros:
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// BPP - 8, 16 or 32
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// EXTRA_ARGS - optional extra arguments
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// FILL_RECT - fill a rectangle with a single colour
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// IMAGE_RECT - draw a rectangle of pixel data from a buffer
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#include <rdr/InStream.h>
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#include <rfb/hextileConstants.h>
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namespace rfb {
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// CONCAT2E concatenates its arguments, expanding them if they are macros
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#ifndef CONCAT2E
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#define CONCAT2(a,b) a##b
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#define CONCAT2E(a,b) CONCAT2(a,b)
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#endif
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#define PIXEL_T rdr::CONCAT2E(U,BPP)
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#define READ_PIXEL CONCAT2E(readOpaque,BPP)
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#define HEXTILE_DECODE CONCAT2E(hextileDecode,BPP)
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void HEXTILE_DECODE (const Rect& r, rdr::InStream* is, PIXEL_T* buf
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#ifdef EXTRA_ARGS
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, EXTRA_ARGS
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#endif
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)
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{
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Rect t;
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PIXEL_T bg = 0;
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PIXEL_T fg = 0;
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for (t.tl.y = r.tl.y; t.tl.y < r.br.y; t.tl.y += 16) {
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t.br.y = min(r.br.y, t.tl.y + 16);
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for (t.tl.x = r.tl.x; t.tl.x < r.br.x; t.tl.x += 16) {
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t.br.x = min(r.br.x, t.tl.x + 16);
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int tileType = is->readU8();
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if (tileType & hextileRaw) {
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is->readBytes(buf, t.area() * (BPP/8));
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IMAGE_RECT(t, buf);
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continue;
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}
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if (tileType & hextileBgSpecified)
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bg = is->READ_PIXEL();
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#ifdef FAVOUR_FILL_RECT
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FILL_RECT(t, bg);
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#else
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int len = t.area();
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PIXEL_T* ptr = (PIXEL_T*)buf;
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while (len-- > 0) *ptr++ = bg;
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#endif
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if (tileType & hextileFgSpecified)
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fg = is->READ_PIXEL();
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if (tileType & hextileAnySubrects) {
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int nSubrects = is->readU8();
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for (int i = 0; i < nSubrects; i++) {
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if (tileType & hextileSubrectsColoured)
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fg = is->READ_PIXEL();
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int xy = is->readU8();
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int wh = is->readU8();
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#ifdef FAVOUR_FILL_RECT
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Rect s;
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s.tl.x = t.tl.x + ((xy >> 4) & 15);
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s.tl.y = t.tl.y + (xy & 15);
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s.br.x = s.tl.x + ((wh >> 4) & 15) + 1;
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s.br.y = s.tl.y + (wh & 15) + 1;
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FILL_RECT(s, fg);
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#else
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int x = ((xy >> 4) & 15);
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int y = (xy & 15);
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int w = ((wh >> 4) & 15) + 1;
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int h = (wh & 15) + 1;
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PIXEL_T* ptr = (PIXEL_T*)buf + y * t.width() + x;
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int rowAdd = t.width() - w;
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while (h-- > 0) {
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int len = w;
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while (len-- > 0) *ptr++ = fg;
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ptr += rowAdd;
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}
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#endif
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}
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}
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#ifndef FAVOUR_FILL_RECT
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IMAGE_RECT(t, buf);
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#endif
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}
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}
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}
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#undef PIXEL_T
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#undef READ_PIXEL
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#undef HEXTILE_DECODE
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}
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