mirror of
https://github.com/kasmtech/KasmVNC.git
synced 2024-12-01 04:23:22 +01:00
112 lines
3.0 KiB
C++
112 lines
3.0 KiB
C++
/* Copyright (C) 2002-2005 RealVNC Ltd. 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 decoding function.
|
|
//
|
|
// This file is #included after having set the following macro:
|
|
// BPP - 8, 16 or 32
|
|
|
|
#include <rdr/InStream.h>
|
|
#include <rfb/Exception.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 READ_PIXEL CONCAT2E(readOpaque,BPP)
|
|
#define HEXTILE_DECODE CONCAT2E(hextileDecode,BPP)
|
|
|
|
static void HEXTILE_DECODE (const Rect& r, rdr::InStream* is,
|
|
const PixelFormat& pf,
|
|
ModifiablePixelBuffer* pb)
|
|
{
|
|
Rect t;
|
|
PIXEL_T bg = 0;
|
|
PIXEL_T fg = 0;
|
|
PIXEL_T buf[16 * 16];
|
|
|
|
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);
|
|
|
|
int tileType = is->readU8();
|
|
|
|
if (tileType & hextileRaw) {
|
|
is->readBytes(buf, t.area() * (BPP/8));
|
|
pb->imageRect(pf, t, buf);
|
|
continue;
|
|
}
|
|
|
|
if (tileType & hextileBgSpecified)
|
|
bg = is->READ_PIXEL();
|
|
|
|
int len = t.area();
|
|
PIXEL_T* ptr = buf;
|
|
while (len-- > 0) *ptr++ = bg;
|
|
|
|
if (tileType & hextileFgSpecified)
|
|
fg = is->READ_PIXEL();
|
|
|
|
if (tileType & hextileAnySubrects) {
|
|
int nSubrects = is->readU8();
|
|
|
|
for (int i = 0; i < nSubrects; i++) {
|
|
|
|
if (tileType & hextileSubrectsColoured)
|
|
fg = is->READ_PIXEL();
|
|
|
|
int xy = is->readU8();
|
|
int wh = is->readU8();
|
|
|
|
int x = ((xy >> 4) & 15);
|
|
int y = (xy & 15);
|
|
int w = ((wh >> 4) & 15) + 1;
|
|
int h = (wh & 15) + 1;
|
|
if (x + w > 16 || y + h > 16) {
|
|
throw rfb::Exception("HEXTILE_DECODE: Hextile out of bounds");
|
|
}
|
|
PIXEL_T* ptr = buf + y * t.width() + x;
|
|
int rowAdd = t.width() - w;
|
|
while (h-- > 0) {
|
|
int len = w;
|
|
while (len-- > 0) *ptr++ = fg;
|
|
ptr += rowAdd;
|
|
}
|
|
}
|
|
}
|
|
pb->imageRect(pf, t, buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
#undef PIXEL_T
|
|
#undef READ_PIXEL
|
|
#undef HEXTILE_DECODE
|
|
}
|