diff options
Diffstat (limited to 'zrleDecode.h')
| -rw-r--r-- | zrleDecode.h | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/zrleDecode.h b/zrleDecode.h deleted file mode 100644 index 8ddb5c8..0000000 --- a/zrleDecode.h +++ /dev/null @@ -1,241 +0,0 @@ -// -// Copyright (C) 2002 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. - -// -// zrleDecode.h - zrle decoding function. -// -// Before including this file, you must define a number of CPP macros. -// -// BPP should be 8, 16 or 32 depending on the bits per pixel. -// FILL_RECT -// IMAGE_RECT - -#include <rdr/ZlibInStream.h> -#include <rdr/InStream.h> -#include <assert.h> - -using namespace rdr; - -/* __RFB_CONCAT2 concatenates its two arguments. __RFB_CONCAT2E does the same - but also expands its arguments if they are macros */ - -#ifndef __RFB_CONCAT2E -#define __RFB_CONCAT2(a,b) a##b -#define __RFB_CONCAT2E(a,b) __RFB_CONCAT2(a,b) -#endif - -#ifdef CPIXEL -#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP) -#define READ_PIXEL __RFB_CONCAT2E(readOpaque,CPIXEL) -#define ZRLE_DECODE_BPP __RFB_CONCAT2E(zrleDecode,CPIXEL) -#else -#define PIXEL_T __RFB_CONCAT2E(rdr::U,BPP) -#define READ_PIXEL __RFB_CONCAT2E(readOpaque,BPP) -#define ZRLE_DECODE_BPP __RFB_CONCAT2E(zrleDecode,BPP) -#endif - -void ZRLE_DECODE_BPP (int x, int y, int w, int h, rdr::InStream* is, - rdr::ZlibInStream* zis, PIXEL_T* buf) -{ - int length = is->readU32(); - zis->setUnderlying(is, length); - - for (int ty = y; ty < y+h; ty += rfbZRLETileHeight) { - int th = rfbZRLETileHeight; - if (th > y+h-ty) th = y+h-ty; - for (int tx = x; tx < x+w; tx += rfbZRLETileWidth) { - int tw = rfbZRLETileWidth; - if (tw > x+w-tx) tw = x+w-tx; - - int mode = zis->readU8(); - bool rle = mode & 128; - int palSize = mode & 127; - PIXEL_T palette[128]; - - // fprintf(stderr,"rle %d palSize %d\n",rle,palSize); - - for (int i = 0; i < palSize; i++) { - palette[i] = zis->READ_PIXEL(); - } - - if (palSize == 1) { - PIXEL_T pix = palette[0]; - FILL_RECT(tx,ty,tw,th,pix); - continue; - } - - if (!rle) { - if (palSize == 0) { - - // raw - -#ifdef CPIXEL - for (PIXEL_T* ptr = buf; ptr < buf+tw*th; ptr++) { - *ptr = zis->READ_PIXEL(); - } -#else - zis->readBytes(buf, tw * th * (BPP / 8)); -#endif - - } else { - - // packed pixels - int bppp = ((palSize > 16) ? 8 : - ((palSize > 4) ? 4 : ((palSize > 2) ? 2 : 1))); - - PIXEL_T* ptr = buf; - - for (int i = 0; i < th; i++) { - PIXEL_T* eol = ptr + tw; - U8 byte = 0; - U8 nbits = 0; - - while (ptr < eol) { - if (nbits == 0) { - byte = zis->readU8(); - nbits = 8; - } - nbits -= bppp; - U8 index = (byte >> nbits) & ((1 << bppp) - 1) & 127; - *ptr++ = palette[index]; - } - } - } - -#ifdef FAVOUR_FILL_RECT - //fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",tw,th,tx,ty); - IMAGE_RECT(tx,ty,tw,th,buf); -#endif - - } else { - - if (palSize == 0) { - - // plain RLE - - PIXEL_T* ptr = buf; - PIXEL_T* end = ptr + th * tw; - while (ptr < end) { - PIXEL_T pix = zis->READ_PIXEL(); - int len = 1; - int b; - do { - b = zis->readU8(); - len += b; - } while (b == 255); - - assert(len <= end - ptr); - -#ifdef FAVOUR_FILL_RECT - int i = ptr - buf; - ptr += len; - - int runX = i % tw; - int runY = i / tw; - - if (runX + len > tw) { - if (runX != 0) { - FILL_RECT(tx+runX, ty+runY, tw-runX, 1, pix); - len -= tw-runX; - runX = 0; - runY++; - } - - if (len > tw) { - FILL_RECT(tx, ty+runY, tw, len/tw, pix); - runY += len / tw; - len = len % tw; - } - } - - if (len != 0) { - FILL_RECT(tx+runX, ty+runY, len, 1, pix); - } -#else - while (len-- > 0) *ptr++ = pix; -#endif - - } - } else { - - // palette RLE - - PIXEL_T* ptr = buf; - PIXEL_T* end = ptr + th * tw; - while (ptr < end) { - int index = zis->readU8(); - int len = 1; - if (index & 128) { - int b; - do { - b = zis->readU8(); - len += b; - } while (b == 255); - - assert(len <= end - ptr); - } - - index &= 127; - - PIXEL_T pix = palette[index]; - -#ifdef FAVOUR_FILL_RECT - int i = ptr - buf; - ptr += len; - - int runX = i % tw; - int runY = i / tw; - - if (runX + len > tw) { - if (runX != 0) { - FILL_RECT(tx+runX, ty+runY, tw-runX, 1, pix); - len -= tw-runX; - runX = 0; - runY++; - } - - if (len > tw) { - FILL_RECT(tx, ty+runY, tw, len/tw, pix); - runY += len / tw; - len = len % tw; - } - } - - if (len != 0) { - FILL_RECT(tx+runX, ty+runY, len, 1, pix); - } -#else - while (len-- > 0) *ptr++ = pix; -#endif - } - } - } - -#ifndef FAVOUR_FILL_RECT - //fprintf(stderr,"copying data to screen %dx%d at %d,%d\n",tw,th,tx,ty); - IMAGE_RECT(tx,ty,tw,th,buf); -#endif - } - } - - zis->reset(); -} - -#undef ZRLE_DECODE_BPP -#undef READ_PIXEL -#undef PIXEL_T |
