| /* |
| * tight.c |
| * |
| * Routines to implement Tight Encoding |
| */ |
| |
| /* |
| * Copyright (C) 2005-2008 Sun Microsystems, Inc. All Rights Reserved. |
| * Copyright (C) 2004 Landmark Graphics Corporation. All Rights Reserved. |
| * Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved. |
| * Copyright (C) 1999 AT&T Laboratories Cambridge. 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. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "rfb.h" |
| #include "turbojpeg.h" |
| |
| /* Note: The following constant should not be changed. */ |
| #define TIGHT_MIN_TO_COMPRESS 12 |
| |
| /* The parameters below may be adjusted. */ |
| #define MIN_SPLIT_RECT_SIZE 4096 |
| #define MIN_SOLID_SUBRECT_SIZE 2048 |
| #define MAX_SPLIT_TILE_SIZE 16 |
| |
| /* This variable is set on every rfbSendRectEncodingTight() call. */ |
| static Bool usePixelFormat24; |
| |
| |
| /* Compression level stuff. The following array contains various |
| encoder parameters for each of 10 compression levels (0..9). |
| Last three parameters correspond to JPEG quality levels (0..9). */ |
| |
| typedef struct TIGHT_CONF_s { |
| int maxRectSize, maxRectWidth; |
| int monoMinRectSize; |
| int idxZlibLevel, monoZlibLevel, rawZlibLevel; |
| int idxMaxColorsDivisor; |
| } TIGHT_CONF; |
| |
| static TIGHT_CONF tightConf[2] = { |
| { 65536, 2048, 6, 0, 0, 0, 4 }, |
| #if 0 |
| { 2048, 128, 6, 1, 1, 1, 8 }, |
| { 6144, 256, 8, 3, 3, 2, 24 }, |
| { 10240, 1024, 12, 5, 5, 3, 32 }, |
| { 16384, 2048, 12, 6, 6, 4, 32 }, |
| { 32768, 2048, 12, 7, 7, 5, 32 }, |
| { 65536, 2048, 16, 7, 7, 6, 48 }, |
| { 65536, 2048, 16, 8, 8, 7, 64 }, |
| { 65536, 2048, 32, 9, 9, 8, 64 }, |
| #endif |
| { 65536, 2048, 32, 1, 1, 1, 96 } |
| }; |
| |
| static int compressLevel; |
| static int qualityLevel; |
| static int subsampLevel; |
| |
| static const int subsampLevel2tjsubsamp[4] = { |
| TJ_444, TJ_411, TJ_422, TJ_GRAYSCALE |
| }; |
| |
| /* Stuff dealing with palettes. */ |
| |
| typedef struct COLOR_LIST_s { |
| struct COLOR_LIST_s *next; |
| int idx; |
| CARD32 rgb; |
| } COLOR_LIST; |
| |
| typedef struct PALETTE_ENTRY_s { |
| COLOR_LIST *listNode; |
| int numPixels; |
| } PALETTE_ENTRY; |
| |
| typedef struct PALETTE_s { |
| PALETTE_ENTRY entry[256]; |
| COLOR_LIST *hash[256]; |
| COLOR_LIST list[256]; |
| } PALETTE; |
| |
| static int paletteNumColors, paletteMaxColors; |
| static CARD32 monoBackground, monoForeground; |
| static PALETTE palette; |
| |
| /* Pointers to dynamically-allocated buffers. */ |
| |
| static int tightBeforeBufSize = 0; |
| static char *tightBeforeBuf = NULL; |
| |
| static int tightAfterBufSize = 0; |
| static char *tightAfterBuf = NULL; |
| |
| static int *prevRowBuf = NULL; |
| |
| |
| /* Prototypes for static functions. */ |
| |
| static void FindBestSolidArea (int x, int y, int w, int h, |
| CARD32 colorValue, int *w_ptr, int *h_ptr); |
| static void ExtendSolidArea (int x, int y, int w, int h, |
| CARD32 colorValue, |
| int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr); |
| static Bool CheckSolidTile (int x, int y, int w, int h, |
| CARD32 *colorPtr, Bool needSameColor); |
| static Bool CheckSolidTile8 (int x, int y, int w, int h, |
| CARD32 *colorPtr, Bool needSameColor); |
| static Bool CheckSolidTile16 (int x, int y, int w, int h, |
| CARD32 *colorPtr, Bool needSameColor); |
| static Bool CheckSolidTile32 (int x, int y, int w, int h, |
| CARD32 *colorPtr, Bool needSameColor); |
| |
| static Bool SendRectSimple (rfbClientPtr cl, int x, int y, int w, int h); |
| static Bool SendSubrect (rfbClientPtr cl, int x, int y, int w, int h); |
| static Bool SendTightHeader (rfbClientPtr cl, int x, int y, int w, int h); |
| |
| static Bool SendSolidRect (rfbClientPtr cl); |
| static Bool SendMonoRect (rfbClientPtr cl, int w, int h); |
| static Bool SendIndexedRect (rfbClientPtr cl, int w, int h); |
| static Bool SendFullColorRect (rfbClientPtr cl, int w, int h); |
| |
| static Bool CompressData(rfbClientPtr cl, int streamId, int dataLen, |
| int zlibLevel, int zlibStrategy); |
| static Bool SendCompressedData(rfbClientPtr cl, char *buf, int compressedLen); |
| |
| static void FillPalette8(int count); |
| static void FillPalette16(int count); |
| static void FillPalette32(int count); |
| static void FastFillPalette16(rfbClientPtr cl, CARD16 *data, int w, int pitch, |
| int h); |
| static void FastFillPalette32(rfbClientPtr cl, CARD32 *data, int w, int pitch, |
| int h); |
| |
| static void PaletteReset(void); |
| static int PaletteInsert(CARD32 rgb, int numPixels, int bpp); |
| |
| static void Pack24(char *buf, rfbPixelFormat *fmt, int count); |
| |
| static void EncodeIndexedRect16(CARD8 *buf, int count); |
| static void EncodeIndexedRect32(CARD8 *buf, int count); |
| |
| static void EncodeMonoRect8(CARD8 *buf, int w, int h); |
| static void EncodeMonoRect16(CARD8 *buf, int w, int h); |
| static void EncodeMonoRect32(CARD8 *buf, int w, int h); |
| |
| static Bool SendJpegRect(rfbClientPtr cl, int x, int y, int w, int h, |
| int quality); |
| |
| /* |
| * Tight encoding implementation. |
| */ |
| |
| int |
| rfbNumCodedRectsTight(cl, x, y, w, h) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| { |
| int maxRectSize, maxRectWidth; |
| int subrectMaxWidth, subrectMaxHeight; |
| |
| /* No matter how many rectangles we will send if LastRect markers |
| are used to terminate rectangle stream. */ |
| if (cl->enableLastRectEncoding && w * h >= MIN_SPLIT_RECT_SIZE) |
| return 0; |
| |
| maxRectSize = tightConf[compressLevel].maxRectSize; |
| maxRectWidth = tightConf[compressLevel].maxRectWidth; |
| |
| if (w > maxRectWidth || w * h > maxRectSize) { |
| subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w; |
| subrectMaxHeight = maxRectSize / subrectMaxWidth; |
| return (((w - 1) / maxRectWidth + 1) * |
| ((h - 1) / subrectMaxHeight + 1)); |
| } else { |
| return 1; |
| } |
| } |
| |
| Bool |
| rfbSendRectEncodingTight(cl, x, y, w, h) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| { |
| int nMaxRows; |
| CARD32 colorValue; |
| int dx, dy, dw, dh; |
| int x_best, y_best, w_best, h_best; |
| char *fbptr; |
| |
| compressLevel = cl->tightCompressLevel > 0 ? 1 : 0; |
| qualityLevel = cl->tightQualityLevel; |
| if (qualityLevel != -1) { |
| compressLevel = 1; |
| tightConf[compressLevel].idxZlibLevel = 1; |
| tightConf[compressLevel].monoZlibLevel = 1; |
| tightConf[compressLevel].rawZlibLevel = 1; |
| } else { |
| tightConf[compressLevel].idxZlibLevel = cl->tightCompressLevel; |
| tightConf[compressLevel].monoZlibLevel = cl->tightCompressLevel; |
| tightConf[compressLevel].rawZlibLevel = cl->tightCompressLevel; |
| } |
| subsampLevel = cl->tightSubsampLevel; |
| |
| if ( cl->format.depth == 24 && cl->format.redMax == 0xFF && |
| cl->format.greenMax == 0xFF && cl->format.blueMax == 0xFF ) { |
| usePixelFormat24 = TRUE; |
| } else { |
| usePixelFormat24 = FALSE; |
| } |
| |
| if (!cl->enableLastRectEncoding || w * h < MIN_SPLIT_RECT_SIZE) |
| return SendRectSimple(cl, x, y, w, h); |
| |
| /* Make sure we can write at least one pixel into tightBeforeBuf. */ |
| |
| if (tightBeforeBufSize < 4) { |
| tightBeforeBufSize = 4; |
| if (tightBeforeBuf == NULL) |
| tightBeforeBuf = (char *)xalloc(tightBeforeBufSize); |
| else |
| tightBeforeBuf = (char *)xrealloc(tightBeforeBuf, |
| tightBeforeBufSize); |
| } |
| |
| /* Calculate maximum number of rows in one non-solid rectangle. */ |
| |
| { |
| int maxRectSize, maxRectWidth, nMaxWidth; |
| |
| maxRectSize = tightConf[compressLevel].maxRectSize; |
| maxRectWidth = tightConf[compressLevel].maxRectWidth; |
| nMaxWidth = (w > maxRectWidth) ? maxRectWidth : w; |
| nMaxRows = maxRectSize / nMaxWidth; |
| } |
| |
| /* Try to find large solid-color areas and send them separately. */ |
| |
| for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) { |
| |
| /* If a rectangle becomes too large, send its upper part now. */ |
| |
| if (dy - y >= nMaxRows) { |
| if (!SendRectSimple(cl, x, y, w, nMaxRows)) |
| return 0; |
| y += nMaxRows; |
| h -= nMaxRows; |
| } |
| |
| dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ? |
| MAX_SPLIT_TILE_SIZE : (y + h - dy); |
| |
| for (dx = x; dx < x + w; dx += MAX_SPLIT_TILE_SIZE) { |
| |
| dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w) ? |
| MAX_SPLIT_TILE_SIZE : (x + w - dx); |
| |
| if (CheckSolidTile(dx, dy, dw, dh, &colorValue, FALSE)) { |
| |
| if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1) { |
| CARD32 r=(colorValue>>16)&0xFF; |
| CARD32 g=(colorValue>>8)&0xFF; |
| CARD32 b=(colorValue)&0xFF; |
| double y=(0.257*(double)r)+(0.504*(double)g) |
| +(0.098*(double)b)+16.; |
| colorValue=(int)y+(((int)y)<<8)+(((int)y)<<16); |
| } |
| |
| /* Get dimensions of solid-color area. */ |
| |
| FindBestSolidArea(dx, dy, w - (dx - x), h - (dy - y), |
| colorValue, &w_best, &h_best); |
| |
| /* Make sure a solid rectangle is large enough |
| (or the whole rectangle is of the same color). */ |
| |
| if ( w_best * h_best != w * h && |
| w_best * h_best < MIN_SOLID_SUBRECT_SIZE ) |
| continue; |
| |
| /* Try to extend solid rectangle to maximum size. */ |
| |
| x_best = dx; y_best = dy; |
| ExtendSolidArea(x, y, w, h, colorValue, |
| &x_best, &y_best, &w_best, &h_best); |
| |
| /* Send rectangles at top and left to solid-color area. */ |
| |
| if ( y_best != y && |
| !SendRectSimple(cl, x, y, w, y_best-y) ) |
| return FALSE; |
| if ( x_best != x && |
| !rfbSendRectEncodingTight(cl, x, y_best, |
| x_best-x, h_best) ) |
| return FALSE; |
| |
| /* Send solid-color rectangle. */ |
| |
| if (!SendTightHeader(cl, x_best, y_best, w_best, h_best)) |
| return FALSE; |
| |
| fbptr = (rfbScreen.pfbMemory + |
| (rfbScreen.paddedWidthInBytes * y_best) + |
| (x_best * (rfbScreen.bitsPerPixel / 8))); |
| |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, |
| &cl->format, fbptr, tightBeforeBuf, |
| rfbScreen.paddedWidthInBytes, 1, 1); |
| |
| if (!SendSolidRect(cl)) |
| return FALSE; |
| |
| /* Send remaining rectangles (at right and bottom). */ |
| |
| if ( x_best + w_best != x + w && |
| !rfbSendRectEncodingTight(cl, x_best+w_best, y_best, |
| w-(x_best-x)-w_best, h_best) ) |
| return FALSE; |
| if ( y_best + h_best != y + h && |
| !rfbSendRectEncodingTight(cl, x, y_best+h_best, |
| w, h-(y_best-y)-h_best) ) |
| return FALSE; |
| |
| /* Return after all recursive calls are done. */ |
| |
| return TRUE; |
| } |
| |
| } |
| |
| } |
| |
| /* No suitable solid-color rectangles found. */ |
| |
| return SendRectSimple(cl, x, y, w, h); |
| } |
| |
| static void |
| FindBestSolidArea(x, y, w, h, colorValue, w_ptr, h_ptr) |
| int x, y, w, h; |
| CARD32 colorValue; |
| int *w_ptr, *h_ptr; |
| { |
| int dx, dy, dw, dh; |
| int w_prev; |
| int w_best = 0, h_best = 0; |
| |
| w_prev = w; |
| |
| for (dy = y; dy < y + h; dy += MAX_SPLIT_TILE_SIZE) { |
| |
| dh = (dy + MAX_SPLIT_TILE_SIZE <= y + h) ? |
| MAX_SPLIT_TILE_SIZE : (y + h - dy); |
| dw = (w_prev > MAX_SPLIT_TILE_SIZE) ? |
| MAX_SPLIT_TILE_SIZE : w_prev; |
| |
| if (!CheckSolidTile(x, dy, dw, dh, &colorValue, TRUE)) |
| break; |
| |
| for (dx = x + dw; dx < x + w_prev;) { |
| dw = (dx + MAX_SPLIT_TILE_SIZE <= x + w_prev) ? |
| MAX_SPLIT_TILE_SIZE : (x + w_prev - dx); |
| if (!CheckSolidTile(dx, dy, dw, dh, &colorValue, TRUE)) |
| break; |
| dx += dw; |
| } |
| |
| w_prev = dx - x; |
| if (w_prev * (dy + dh - y) > w_best * h_best) { |
| w_best = w_prev; |
| h_best = dy + dh - y; |
| } |
| } |
| |
| *w_ptr = w_best; |
| *h_ptr = h_best; |
| } |
| |
| static void |
| ExtendSolidArea(x, y, w, h, colorValue, x_ptr, y_ptr, w_ptr, h_ptr) |
| int x, y, w, h; |
| CARD32 colorValue; |
| int *x_ptr, *y_ptr, *w_ptr, *h_ptr; |
| { |
| int cx, cy; |
| |
| /* Try to extend the area upwards. */ |
| for ( cy = *y_ptr - 1; |
| cy >= y && CheckSolidTile(*x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); |
| cy-- ); |
| *h_ptr += *y_ptr - (cy + 1); |
| *y_ptr = cy + 1; |
| |
| /* ... downwards. */ |
| for ( cy = *y_ptr + *h_ptr; |
| cy < y + h && |
| CheckSolidTile(*x_ptr, cy, *w_ptr, 1, &colorValue, TRUE); |
| cy++ ); |
| *h_ptr += cy - (*y_ptr + *h_ptr); |
| |
| /* ... to the left. */ |
| for ( cx = *x_ptr - 1; |
| cx >= x && CheckSolidTile(cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); |
| cx-- ); |
| *w_ptr += *x_ptr - (cx + 1); |
| *x_ptr = cx + 1; |
| |
| /* ... to the right. */ |
| for ( cx = *x_ptr + *w_ptr; |
| cx < x + w && |
| CheckSolidTile(cx, *y_ptr, 1, *h_ptr, &colorValue, TRUE); |
| cx++ ); |
| *w_ptr += cx - (*x_ptr + *w_ptr); |
| } |
| |
| /* |
| * Check if a rectangle is all of the same color. If needSameColor is |
| * set to non-zero, then also check that its color equals to the |
| * *colorPtr value. The result is 1 if the test is successfull, and in |
| * that case new color will be stored in *colorPtr. |
| */ |
| |
| static Bool |
| CheckSolidTile(x, y, w, h, colorPtr, needSameColor) |
| int x, y, w, h; |
| CARD32 *colorPtr; |
| Bool needSameColor; |
| { |
| switch(rfbServerFormat.bitsPerPixel) { |
| case 32: |
| return CheckSolidTile32(x, y, w, h, colorPtr, needSameColor); |
| case 16: |
| return CheckSolidTile16(x, y, w, h, colorPtr, needSameColor); |
| default: |
| return CheckSolidTile8(x, y, w, h, colorPtr, needSameColor); |
| } |
| } |
| |
| #define DEFINE_CHECK_SOLID_FUNCTION(bpp) \ |
| \ |
| static Bool \ |
| CheckSolidTile##bpp(x, y, w, h, colorPtr, needSameColor) \ |
| int x, y, w, h; \ |
| CARD32 *colorPtr; \ |
| Bool needSameColor; \ |
| { \ |
| CARD##bpp *fbptr; \ |
| CARD##bpp colorValue; \ |
| int dx, dy; \ |
| \ |
| fbptr = (CARD##bpp *) \ |
| &rfbScreen.pfbMemory[y * rfbScreen.paddedWidthInBytes + x * (bpp/8)]; \ |
| \ |
| colorValue = *fbptr; \ |
| if (needSameColor && (CARD32)colorValue != *colorPtr) \ |
| return FALSE; \ |
| \ |
| for (dy = 0; dy < h; dy++) { \ |
| for (dx = 0; dx < w; dx++) { \ |
| if (colorValue != fbptr[dx]) \ |
| return FALSE; \ |
| } \ |
| fbptr = (CARD##bpp *)((CARD8 *)fbptr + rfbScreen.paddedWidthInBytes); \ |
| } \ |
| \ |
| *colorPtr = (CARD32)colorValue; \ |
| return TRUE; \ |
| } |
| |
| DEFINE_CHECK_SOLID_FUNCTION(8) |
| DEFINE_CHECK_SOLID_FUNCTION(16) |
| DEFINE_CHECK_SOLID_FUNCTION(32) |
| |
| static Bool |
| SendRectSimple(cl, x, y, w, h) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| { |
| int maxBeforeSize, maxAfterSize; |
| int maxRectSize, maxRectWidth; |
| int subrectMaxWidth, subrectMaxHeight; |
| int dx, dy; |
| int rw, rh; |
| |
| maxRectSize = tightConf[compressLevel].maxRectSize; |
| maxRectWidth = tightConf[compressLevel].maxRectWidth; |
| |
| maxBeforeSize = maxRectSize * (cl->format.bitsPerPixel / 8); |
| maxAfterSize = maxBeforeSize + (maxBeforeSize + 99) / 100 + 12; |
| |
| if (tightBeforeBufSize < maxBeforeSize) { |
| tightBeforeBufSize = maxBeforeSize; |
| if (tightBeforeBuf == NULL) |
| tightBeforeBuf = (char *)xalloc(tightBeforeBufSize); |
| else |
| tightBeforeBuf = (char *)xrealloc(tightBeforeBuf, |
| tightBeforeBufSize); |
| } |
| |
| if (tightAfterBufSize < maxAfterSize) { |
| tightAfterBufSize = maxAfterSize; |
| if (tightAfterBuf == NULL) |
| tightAfterBuf = (char *)xalloc(tightAfterBufSize); |
| else |
| tightAfterBuf = (char *)xrealloc(tightAfterBuf, |
| tightAfterBufSize); |
| } |
| |
| if (w > maxRectWidth || w * h > maxRectSize) { |
| subrectMaxWidth = (w > maxRectWidth) ? maxRectWidth : w; |
| subrectMaxHeight = maxRectSize / subrectMaxWidth; |
| |
| for (dy = 0; dy < h; dy += subrectMaxHeight) { |
| for (dx = 0; dx < w; dx += maxRectWidth) { |
| rw = (dx + maxRectWidth < w) ? maxRectWidth : w - dx; |
| rh = (dy + subrectMaxHeight < h) ? subrectMaxHeight : h - dy; |
| if (!SendSubrect(cl, x+dx, y+dy, rw, rh)) |
| return FALSE; |
| } |
| } |
| } else { |
| if (!SendSubrect(cl, x, y, w, h)) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| static Bool |
| SendSubrect(cl, x, y, w, h) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| { |
| char *fbptr; |
| Bool success = FALSE; |
| |
| /* Send pending data if there is more than 128 bytes. */ |
| if (ublen > 128) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| if (!SendTightHeader(cl, x, y, w, h)) |
| return FALSE; |
| |
| fbptr = (rfbScreen.pfbMemory + (rfbScreen.paddedWidthInBytes * y) |
| + (x * (rfbScreen.bitsPerPixel / 8))); |
| |
| if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1) |
| return SendJpegRect(cl, x, y, w, h, qualityLevel); |
| |
| paletteMaxColors = w * h / tightConf[compressLevel].idxMaxColorsDivisor; |
| if(qualityLevel != -1) |
| paletteMaxColors = 24; |
| if ( paletteMaxColors < 2 && |
| w * h >= tightConf[compressLevel].monoMinRectSize ) { |
| paletteMaxColors = 2; |
| } |
| |
| if (cl->format.bitsPerPixel == rfbServerFormat.bitsPerPixel && |
| cl->format.redMax == rfbServerFormat.redMax && |
| cl->format.greenMax == rfbServerFormat.greenMax && |
| cl->format.blueMax == rfbServerFormat.blueMax && |
| cl->format.bitsPerPixel >= 16) { |
| |
| /* This is so we can avoid translating the pixels when compressing |
| with JPEG, since it is unnecessary */ |
| switch (cl->format.bitsPerPixel) { |
| case 16: |
| FastFillPalette16(cl, (CARD16 *)fbptr, w, |
| rfbScreen.paddedWidthInBytes/2, h); |
| break; |
| default: |
| FastFillPalette32(cl, (CARD32 *)fbptr, w, |
| rfbScreen.paddedWidthInBytes/4, h); |
| } |
| |
| if(paletteNumColors != 0 || qualityLevel == -1) { |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, |
| &cl->format, fbptr, tightBeforeBuf, |
| rfbScreen.paddedWidthInBytes, w, h); |
| } |
| } |
| else { |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, |
| &cl->format, fbptr, tightBeforeBuf, |
| rfbScreen.paddedWidthInBytes, w, h); |
| |
| switch (cl->format.bitsPerPixel) { |
| case 8: |
| FillPalette8(w * h); |
| break; |
| case 16: |
| FillPalette16(w * h); |
| break; |
| default: |
| FillPalette32(w * h); |
| } |
| } |
| |
| switch (paletteNumColors) { |
| case 0: |
| /* Truecolor image */ |
| if (qualityLevel != -1) { |
| success = SendJpegRect(cl, x, y, w, h, qualityLevel); |
| } else { |
| success = SendFullColorRect(cl, w, h); |
| } |
| break; |
| case 1: |
| /* Solid rectangle */ |
| success = SendSolidRect(cl); |
| break; |
| case 2: |
| /* Two-color rectangle */ |
| success = SendMonoRect(cl, w, h); |
| break; |
| default: |
| /* Up to 256 different colors */ |
| success = SendIndexedRect(cl, w, h); |
| } |
| return success; |
| } |
| |
| static Bool |
| SendTightHeader(cl, x, y, w, h) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| { |
| rfbFramebufferUpdateRectHeader rect; |
| |
| if (ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| rect.r.x = Swap16IfLE(x); |
| rect.r.y = Swap16IfLE(y); |
| rect.r.w = Swap16IfLE(w); |
| rect.r.h = Swap16IfLE(h); |
| rect.encoding = Swap32IfLE(rfbEncodingTight); |
| |
| memcpy(&updateBuf[ublen], (char *)&rect, |
| sz_rfbFramebufferUpdateRectHeader); |
| ublen += sz_rfbFramebufferUpdateRectHeader; |
| |
| cl->rfbRectanglesSent[rfbEncodingTight]++; |
| cl->rfbBytesSent[rfbEncodingTight] += sz_rfbFramebufferUpdateRectHeader; |
| |
| return TRUE; |
| } |
| |
| /* |
| * Subencoding implementations. |
| */ |
| |
| static Bool |
| SendSolidRect(cl) |
| rfbClientPtr cl; |
| { |
| int len; |
| |
| if (usePixelFormat24) { |
| Pack24(tightBeforeBuf, &cl->format, 1); |
| len = 3; |
| } else |
| len = cl->format.bitsPerPixel / 8; |
| |
| if (ublen + 1 + len > UPDATE_BUF_SIZE) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| updateBuf[ublen++] = (char)(rfbTightFill << 4); |
| memcpy (&updateBuf[ublen], tightBeforeBuf, len); |
| ublen += len; |
| |
| cl->rfbBytesSent[rfbEncodingTight] += len + 1; |
| |
| return TRUE; |
| } |
| |
| static Bool |
| SendMonoRect(cl, w, h) |
| rfbClientPtr cl; |
| int w, h; |
| { |
| int streamId = 1; |
| int paletteLen, dataLen; |
| |
| if ( (ublen + TIGHT_MIN_TO_COMPRESS + 6 + |
| 2 * cl->format.bitsPerPixel / 8) > UPDATE_BUF_SIZE ) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| /* Prepare tight encoding header. */ |
| dataLen = (w + 7) / 8; |
| dataLen *= h; |
| |
| if (tightConf[compressLevel].monoZlibLevel == 0) |
| updateBuf[ublen++] = (char)((rfbTightNoZlib | rfbTightExplicitFilter) << 4); |
| else |
| updateBuf[ublen++] = (streamId | rfbTightExplicitFilter) << 4; |
| updateBuf[ublen++] = rfbTightFilterPalette; |
| updateBuf[ublen++] = 1; |
| |
| /* Prepare palette, convert image. */ |
| switch (cl->format.bitsPerPixel) { |
| |
| case 32: |
| EncodeMonoRect32((CARD8 *)tightBeforeBuf, w, h); |
| |
| ((CARD32 *)tightAfterBuf)[0] = monoBackground; |
| ((CARD32 *)tightAfterBuf)[1] = monoForeground; |
| if (usePixelFormat24) { |
| Pack24(tightAfterBuf, &cl->format, 2); |
| paletteLen = 6; |
| } else |
| paletteLen = 8; |
| |
| memcpy(&updateBuf[ublen], tightAfterBuf, paletteLen); |
| ublen += paletteLen; |
| cl->rfbBytesSent[rfbEncodingTight] += 3 + paletteLen; |
| break; |
| |
| case 16: |
| EncodeMonoRect16((CARD8 *)tightBeforeBuf, w, h); |
| |
| ((CARD16 *)tightAfterBuf)[0] = (CARD16)monoBackground; |
| ((CARD16 *)tightAfterBuf)[1] = (CARD16)monoForeground; |
| |
| memcpy(&updateBuf[ublen], tightAfterBuf, 4); |
| ublen += 4; |
| cl->rfbBytesSent[rfbEncodingTight] += 7; |
| break; |
| |
| default: |
| EncodeMonoRect8((CARD8 *)tightBeforeBuf, w, h); |
| |
| updateBuf[ublen++] = (char)monoBackground; |
| updateBuf[ublen++] = (char)monoForeground; |
| cl->rfbBytesSent[rfbEncodingTight] += 5; |
| } |
| |
| return CompressData(cl, streamId, dataLen, |
| tightConf[compressLevel].monoZlibLevel, |
| Z_DEFAULT_STRATEGY); |
| } |
| |
| static Bool |
| SendIndexedRect(cl, w, h) |
| rfbClientPtr cl; |
| int w, h; |
| { |
| int streamId = 2; |
| int i, entryLen; |
| |
| if ( (ublen + TIGHT_MIN_TO_COMPRESS + 6 + |
| paletteNumColors * cl->format.bitsPerPixel / 8) > UPDATE_BUF_SIZE ) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| /* Prepare tight encoding header. */ |
| if (tightConf[compressLevel].idxZlibLevel == 0) |
| updateBuf[ublen++] = (char)((rfbTightNoZlib | rfbTightExplicitFilter) << 4); |
| else |
| updateBuf[ublen++] = (streamId | rfbTightExplicitFilter) << 4; |
| updateBuf[ublen++] = rfbTightFilterPalette; |
| updateBuf[ublen++] = (char)(paletteNumColors - 1); |
| |
| /* Prepare palette, convert image. */ |
| switch (cl->format.bitsPerPixel) { |
| |
| case 32: |
| EncodeIndexedRect32((CARD8 *)tightBeforeBuf, w * h); |
| |
| for (i = 0; i < paletteNumColors; i++) { |
| ((CARD32 *)tightAfterBuf)[i] = |
| palette.entry[i].listNode->rgb; |
| } |
| if (usePixelFormat24) { |
| Pack24(tightAfterBuf, &cl->format, paletteNumColors); |
| entryLen = 3; |
| } else |
| entryLen = 4; |
| |
| memcpy(&updateBuf[ublen], tightAfterBuf, paletteNumColors * entryLen); |
| ublen += paletteNumColors * entryLen; |
| cl->rfbBytesSent[rfbEncodingTight] += 3 + paletteNumColors * entryLen; |
| break; |
| |
| case 16: |
| EncodeIndexedRect16((CARD8 *)tightBeforeBuf, w * h); |
| |
| for (i = 0; i < paletteNumColors; i++) { |
| ((CARD16 *)tightAfterBuf)[i] = |
| (CARD16)palette.entry[i].listNode->rgb; |
| } |
| |
| memcpy(&updateBuf[ublen], tightAfterBuf, paletteNumColors * 2); |
| ublen += paletteNumColors * 2; |
| cl->rfbBytesSent[rfbEncodingTight] += 3 + paletteNumColors * 2; |
| break; |
| |
| default: |
| return FALSE; /* Should never happen. */ |
| } |
| |
| return CompressData(cl, streamId, w * h, |
| tightConf[compressLevel].idxZlibLevel, |
| Z_DEFAULT_STRATEGY); |
| } |
| |
| static Bool |
| SendFullColorRect(cl, w, h) |
| rfbClientPtr cl; |
| int w, h; |
| { |
| int streamId = 0; |
| int len; |
| |
| if (ublen + TIGHT_MIN_TO_COMPRESS + 1 > UPDATE_BUF_SIZE) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| if (tightConf[compressLevel].rawZlibLevel == 0) |
| updateBuf[ublen++] = (char)(rfbTightNoZlib << 4); |
| else |
| updateBuf[ublen++] = 0x00; /* stream id = 0, no flushing, no filter */ |
| cl->rfbBytesSent[rfbEncodingTight]++; |
| |
| if (usePixelFormat24) { |
| Pack24(tightBeforeBuf, &cl->format, w * h); |
| len = 3; |
| } else |
| len = cl->format.bitsPerPixel / 8; |
| |
| return CompressData(cl, streamId, w * h * len, |
| tightConf[compressLevel].rawZlibLevel, |
| Z_DEFAULT_STRATEGY); |
| } |
| |
| static Bool |
| CompressData(cl, streamId, dataLen, zlibLevel, zlibStrategy) |
| rfbClientPtr cl; |
| int streamId, dataLen, zlibLevel, zlibStrategy; |
| { |
| z_streamp pz; |
| int err, i; |
| |
| if (dataLen < TIGHT_MIN_TO_COMPRESS) { |
| memcpy(&updateBuf[ublen], tightBeforeBuf, dataLen); |
| ublen += dataLen; |
| cl->rfbBytesSent[rfbEncodingTight] += dataLen; |
| return TRUE; |
| } |
| |
| if (zlibLevel == 0) |
| return SendCompressedData (cl, tightBeforeBuf, dataLen); |
| |
| pz = &cl->zsStruct[streamId]; |
| |
| /* Initialize compression stream if needed. */ |
| if (!cl->zsActive[streamId]) { |
| pz->zalloc = Z_NULL; |
| pz->zfree = Z_NULL; |
| pz->opaque = Z_NULL; |
| |
| err = deflateInit2 (pz, zlibLevel, Z_DEFLATED, MAX_WBITS, |
| MAX_MEM_LEVEL, zlibStrategy); |
| if (err != Z_OK) |
| return FALSE; |
| |
| cl->zsActive[streamId] = TRUE; |
| cl->zsLevel[streamId] = zlibLevel; |
| } |
| |
| /* Prepare buffer pointers. */ |
| pz->next_in = (Bytef *)tightBeforeBuf; |
| pz->avail_in = dataLen; |
| pz->next_out = (Bytef *)tightAfterBuf; |
| pz->avail_out = tightAfterBufSize; |
| |
| /* Change compression parameters if needed. */ |
| if (zlibLevel != cl->zsLevel[streamId]) { |
| if (deflateParams (pz, zlibLevel, zlibStrategy) != Z_OK) { |
| return FALSE; |
| } |
| cl->zsLevel[streamId] = zlibLevel; |
| } |
| |
| /* Actual compression. */ |
| if ( deflate (pz, Z_SYNC_FLUSH) != Z_OK || |
| pz->avail_in != 0 || pz->avail_out == 0 ) { |
| return FALSE; |
| } |
| |
| return SendCompressedData(cl, tightAfterBuf, |
| tightAfterBufSize - pz->avail_out); |
| } |
| |
| static Bool SendCompressedData(cl, buf, compressedLen) |
| rfbClientPtr cl; |
| char *buf; |
| int compressedLen; |
| { |
| int i, portionLen; |
| |
| updateBuf[ublen++] = compressedLen & 0x7F; |
| cl->rfbBytesSent[rfbEncodingTight]++; |
| if (compressedLen > 0x7F) { |
| updateBuf[ublen-1] |= 0x80; |
| updateBuf[ublen++] = compressedLen >> 7 & 0x7F; |
| cl->rfbBytesSent[rfbEncodingTight]++; |
| if (compressedLen > 0x3FFF) { |
| updateBuf[ublen-1] |= 0x80; |
| updateBuf[ublen++] = compressedLen >> 14 & 0xFF; |
| cl->rfbBytesSent[rfbEncodingTight]++; |
| } |
| } |
| |
| portionLen = UPDATE_BUF_SIZE; |
| for (i = 0; i < compressedLen; i += portionLen) { |
| if (i + portionLen > compressedLen) { |
| portionLen = compressedLen - i; |
| } |
| if (ublen + portionLen > UPDATE_BUF_SIZE) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| memcpy(&updateBuf[ublen], &buf[i], portionLen); |
| ublen += portionLen; |
| } |
| cl->rfbBytesSent[rfbEncodingTight] += compressedLen; |
| return TRUE; |
| } |
| |
| /* |
| * Code to determine how many different colors used in rectangle. |
| */ |
| |
| static void |
| FillPalette8(count) |
| int count; |
| { |
| CARD8 *data = (CARD8 *)tightBeforeBuf; |
| CARD8 c0, c1; |
| int i, n0, n1; |
| |
| paletteNumColors = 0; |
| |
| c0 = data[0]; |
| for (i = 1; i < count && data[i] == c0; i++); |
| if (i == count) { |
| paletteNumColors = 1; |
| return; /* Solid rectangle */ |
| } |
| |
| if (paletteMaxColors < 2) |
| return; |
| |
| n0 = i; |
| c1 = data[i]; |
| n1 = 0; |
| for (i++; i < count; i++) { |
| if (data[i] == c0) { |
| n0++; |
| } else if (data[i] == c1) { |
| n1++; |
| } else |
| break; |
| } |
| if (i == count) { |
| if (n0 > n1) { |
| monoBackground = (CARD32)c0; |
| monoForeground = (CARD32)c1; |
| } else { |
| monoBackground = (CARD32)c1; |
| monoForeground = (CARD32)c0; |
| } |
| paletteNumColors = 2; /* Two colors */ |
| } |
| } |
| |
| #define DEFINE_FILL_PALETTE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| FillPalette##bpp(count) \ |
| int count; \ |
| { \ |
| CARD##bpp *data = (CARD##bpp *)tightBeforeBuf; \ |
| CARD##bpp c0, c1, ci; \ |
| int i, n0, n1, ni; \ |
| \ |
| c0 = data[0]; \ |
| for (i = 1; i < count && data[i] == c0; i++); \ |
| if (i >= count) { \ |
| paletteNumColors = 1; /* Solid rectangle */ \ |
| return; \ |
| } \ |
| \ |
| if (paletteMaxColors < 2) { \ |
| paletteNumColors = 0; /* Full-color encoding preferred */ \ |
| return; \ |
| } \ |
| \ |
| n0 = i; \ |
| c1 = data[i]; \ |
| n1 = 0; \ |
| for (i++; i < count; i++) { \ |
| ci = data[i]; \ |
| if (ci == c0) { \ |
| n0++; \ |
| } else if (ci == c1) { \ |
| n1++; \ |
| } else \ |
| break; \ |
| } \ |
| if (i >= count) { \ |
| if (n0 > n1) { \ |
| monoBackground = (CARD32)c0; \ |
| monoForeground = (CARD32)c1; \ |
| } else { \ |
| monoBackground = (CARD32)c1; \ |
| monoForeground = (CARD32)c0; \ |
| } \ |
| paletteNumColors = 2; /* Two colors */ \ |
| return; \ |
| } \ |
| \ |
| PaletteReset(); \ |
| PaletteInsert (c0, (CARD32)n0, bpp); \ |
| PaletteInsert (c1, (CARD32)n1, bpp); \ |
| \ |
| ni = 1; \ |
| for (i++; i < count; i++) { \ |
| if (data[i] == ci) { \ |
| ni++; \ |
| } else { \ |
| if (!PaletteInsert (ci, (CARD32)ni, bpp)) \ |
| return; \ |
| ci = data[i]; \ |
| ni = 1; \ |
| } \ |
| } \ |
| PaletteInsert (ci, (CARD32)ni, bpp); \ |
| } |
| |
| DEFINE_FILL_PALETTE_FUNCTION(16) |
| DEFINE_FILL_PALETTE_FUNCTION(32) |
| |
| #define DEFINE_FAST_FILL_PALETTE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| FastFillPalette##bpp(cl, data, w, pitch, h) \ |
| rfbClientPtr cl; \ |
| CARD##bpp *data; \ |
| int w, pitch, h; \ |
| { \ |
| CARD##bpp c0, c1, ci, mask, c0t, c1t, cit; \ |
| int i, j, i2, j2, n0, n1, ni; \ |
| \ |
| if (cl->translateFn != rfbTranslateNone) { \ |
| mask = rfbServerFormat.redMax << rfbServerFormat.redShift; \ |
| mask |= rfbServerFormat.greenMax << rfbServerFormat.greenShift; \ |
| mask |= rfbServerFormat.blueMax << rfbServerFormat.blueShift; \ |
| } else mask = ~0; \ |
| \ |
| c0 = data[0] & mask; \ |
| for (j = 0; j < h; j++) { \ |
| for (i = 0; i < w; i++) { \ |
| if ((data[j * pitch + i] & mask) != c0) \ |
| goto done; \ |
| } \ |
| } \ |
| done: \ |
| if (j >= h) { \ |
| paletteNumColors = 1; /* Solid rectangle */ \ |
| return; \ |
| } \ |
| if (paletteMaxColors < 2) { \ |
| paletteNumColors = 0; /* Full-color encoding preferred */ \ |
| return; \ |
| } \ |
| \ |
| n0 = j * w + i; \ |
| c1 = data[j * pitch + i] & mask; \ |
| n1 = 0; \ |
| i++; if (i >= w) {i = 0; j++;} \ |
| for (j2 = j; j2 < h; j2++) { \ |
| for (i2 = i; i2 < w; i2++) { \ |
| ci = data[j2 * pitch + i2] & mask; \ |
| if (ci == c0) { \ |
| n0++; \ |
| } else if (ci == c1) { \ |
| n1++; \ |
| } else \ |
| goto done2; \ |
| } \ |
| i = 0; \ |
| } \ |
| done2: \ |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, \ |
| &cl->format, (char *)&c0, (char *)&c0t, bpp/8, \ |
| 1, 1); \ |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, \ |
| &cl->format, (char *)&c1, (char *)&c1t, bpp/8, \ |
| 1, 1); \ |
| if (j2 >= h) { \ |
| if (n0 > n1) { \ |
| monoBackground = (CARD32)c0t; \ |
| monoForeground = (CARD32)c1t; \ |
| } else { \ |
| monoBackground = (CARD32)c1t; \ |
| monoForeground = (CARD32)c0t; \ |
| } \ |
| paletteNumColors = 2; /* Two colors */ \ |
| return; \ |
| } \ |
| \ |
| PaletteReset(); \ |
| PaletteInsert (c0t, (CARD32)n0, bpp); \ |
| PaletteInsert (c1t, (CARD32)n1, bpp); \ |
| \ |
| ni = 1; \ |
| i2++; if (i2 >= w) {i2 = 0; j2++;} \ |
| for (j = j2; j < h; j++) { \ |
| for (i = i2; i < w; i++) { \ |
| if ((data[j * pitch + i] & mask) == ci) { \ |
| ni++; \ |
| } else { \ |
| (*cl->translateFn)(cl->translateLookupTable, \ |
| &rfbServerFormat, &cl->format, \ |
| (char *)&ci, (char *)&cit, bpp/8, \ |
| 1, 1); \ |
| if (!PaletteInsert (cit, (CARD32)ni, bpp)) \ |
| return; \ |
| ci = data[j * pitch + i] & mask; \ |
| ni = 1; \ |
| } \ |
| } \ |
| i2 = 0; \ |
| } \ |
| \ |
| (*cl->translateFn)(cl->translateLookupTable, &rfbServerFormat, \ |
| &cl->format, (char *)&ci, (char *)&cit, bpp/8, \ |
| 1, 1); \ |
| PaletteInsert (cit, (CARD32)ni, bpp); \ |
| } |
| |
| DEFINE_FAST_FILL_PALETTE_FUNCTION(16) |
| DEFINE_FAST_FILL_PALETTE_FUNCTION(32) |
| |
| |
| /* |
| * Functions to operate with palette structures. |
| */ |
| |
| #define HASH_FUNC16(rgb) ((int)((((rgb) >> 8) + (rgb)) & 0xFF)) |
| #define HASH_FUNC32(rgb) ((int)((((rgb) >> 16) + ((rgb) >> 8)) & 0xFF)) |
| |
| static void |
| PaletteReset(void) |
| { |
| paletteNumColors = 0; |
| memset(palette.hash, 0, 256 * sizeof(COLOR_LIST *)); |
| } |
| |
| static int |
| PaletteInsert(rgb, numPixels, bpp) |
| CARD32 rgb; |
| int numPixels; |
| int bpp; |
| { |
| COLOR_LIST *pnode; |
| COLOR_LIST *prev_pnode = NULL; |
| int hash_key, idx, new_idx, count; |
| |
| hash_key = (bpp == 16) ? HASH_FUNC16(rgb) : HASH_FUNC32(rgb); |
| |
| pnode = palette.hash[hash_key]; |
| |
| while (pnode != NULL) { |
| if (pnode->rgb == rgb) { |
| /* Such palette entry already exists. */ |
| new_idx = idx = pnode->idx; |
| count = palette.entry[idx].numPixels + numPixels; |
| if (new_idx && palette.entry[new_idx-1].numPixels < count) { |
| do { |
| palette.entry[new_idx] = palette.entry[new_idx-1]; |
| palette.entry[new_idx].listNode->idx = new_idx; |
| new_idx--; |
| } |
| while (new_idx && palette.entry[new_idx-1].numPixels < count); |
| palette.entry[new_idx].listNode = pnode; |
| pnode->idx = new_idx; |
| } |
| palette.entry[new_idx].numPixels = count; |
| return paletteNumColors; |
| } |
| prev_pnode = pnode; |
| pnode = pnode->next; |
| } |
| |
| /* Check if palette is full. */ |
| if (paletteNumColors == 256 || paletteNumColors == paletteMaxColors) { |
| paletteNumColors = 0; |
| return 0; |
| } |
| |
| /* Move palette entries with lesser pixel counts. */ |
| for ( idx = paletteNumColors; |
| idx > 0 && palette.entry[idx-1].numPixels < numPixels; |
| idx-- ) { |
| palette.entry[idx] = palette.entry[idx-1]; |
| palette.entry[idx].listNode->idx = idx; |
| } |
| |
| /* Add new palette entry into the freed slot. */ |
| pnode = &palette.list[paletteNumColors]; |
| if (prev_pnode != NULL) { |
| prev_pnode->next = pnode; |
| } else { |
| palette.hash[hash_key] = pnode; |
| } |
| pnode->next = NULL; |
| pnode->idx = idx; |
| pnode->rgb = rgb; |
| palette.entry[idx].listNode = pnode; |
| palette.entry[idx].numPixels = numPixels; |
| |
| return (++paletteNumColors); |
| } |
| |
| |
| /* |
| * Converting 32-bit color samples into 24-bit colors. |
| * Should be called only when redMax, greenMax and blueMax are 255. |
| * Color components assumed to be byte-aligned. |
| */ |
| |
| static void Pack24(buf, fmt, count) |
| char *buf; |
| rfbPixelFormat *fmt; |
| int count; |
| { |
| CARD32 *buf32; |
| CARD32 pix; |
| int r_shift, g_shift, b_shift; |
| |
| buf32 = (CARD32 *)buf; |
| |
| if (!rfbServerFormat.bigEndian == !fmt->bigEndian) { |
| r_shift = fmt->redShift; |
| g_shift = fmt->greenShift; |
| b_shift = fmt->blueShift; |
| } else { |
| r_shift = 24 - fmt->redShift; |
| g_shift = 24 - fmt->greenShift; |
| b_shift = 24 - fmt->blueShift; |
| } |
| |
| while (count--) { |
| pix = *buf32++; |
| *buf++ = (char)(pix >> r_shift); |
| *buf++ = (char)(pix >> g_shift); |
| *buf++ = (char)(pix >> b_shift); |
| } |
| } |
| |
| |
| /* |
| * Converting truecolor samples into palette indices. |
| */ |
| |
| #define DEFINE_IDX_ENCODE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| EncodeIndexedRect##bpp(buf, count) \ |
| CARD8 *buf; \ |
| int count; \ |
| { \ |
| COLOR_LIST *pnode; \ |
| CARD##bpp *src; \ |
| CARD##bpp rgb; \ |
| int rep = 0; \ |
| \ |
| src = (CARD##bpp *) buf; \ |
| \ |
| while (count--) { \ |
| rgb = *src++; \ |
| while (count && *src == rgb) { \ |
| rep++, src++, count--; \ |
| } \ |
| pnode = palette.hash[HASH_FUNC##bpp(rgb)]; \ |
| while (pnode != NULL) { \ |
| if ((CARD##bpp)pnode->rgb == rgb) { \ |
| *buf++ = (CARD8)pnode->idx; \ |
| while (rep) { \ |
| *buf++ = (CARD8)pnode->idx; \ |
| rep--; \ |
| } \ |
| break; \ |
| } \ |
| pnode = pnode->next; \ |
| } \ |
| } \ |
| } |
| |
| DEFINE_IDX_ENCODE_FUNCTION(16) |
| DEFINE_IDX_ENCODE_FUNCTION(32) |
| |
| #define DEFINE_MONO_ENCODE_FUNCTION(bpp) \ |
| \ |
| static void \ |
| EncodeMonoRect##bpp(buf, w, h) \ |
| CARD8 *buf; \ |
| int w, h; \ |
| { \ |
| CARD##bpp *ptr; \ |
| CARD##bpp bg; \ |
| unsigned int value, mask; \ |
| int aligned_width; \ |
| int x, y, bg_bits; \ |
| \ |
| ptr = (CARD##bpp *) buf; \ |
| bg = (CARD##bpp) monoBackground; \ |
| aligned_width = w - w % 8; \ |
| \ |
| for (y = 0; y < h; y++) { \ |
| for (x = 0; x < aligned_width; x += 8) { \ |
| for (bg_bits = 0; bg_bits < 8; bg_bits++) { \ |
| if (*ptr++ != bg) \ |
| break; \ |
| } \ |
| if (bg_bits == 8) { \ |
| *buf++ = 0; \ |
| continue; \ |
| } \ |
| mask = 0x80 >> bg_bits; \ |
| value = mask; \ |
| for (bg_bits++; bg_bits < 8; bg_bits++) { \ |
| mask >>= 1; \ |
| if (*ptr++ != bg) { \ |
| value |= mask; \ |
| } \ |
| } \ |
| *buf++ = (CARD8)value; \ |
| } \ |
| \ |
| mask = 0x80; \ |
| value = 0; \ |
| if (x >= w) \ |
| continue; \ |
| \ |
| for (; x < w; x++) { \ |
| if (*ptr++ != bg) { \ |
| value |= mask; \ |
| } \ |
| mask >>= 1; \ |
| } \ |
| *buf++ = (CARD8)value; \ |
| } \ |
| } |
| |
| DEFINE_MONO_ENCODE_FUNCTION(8) |
| DEFINE_MONO_ENCODE_FUNCTION(16) |
| DEFINE_MONO_ENCODE_FUNCTION(32) |
| |
| /* |
| * JPEG compression stuff. |
| */ |
| |
| static unsigned long jpegDstDataLen; |
| static tjhandle j=NULL; |
| |
| static Bool |
| SendJpegRect(cl, x, y, w, h, quality) |
| rfbClientPtr cl; |
| int x, y, w, h; |
| int quality; |
| { |
| int dy; |
| unsigned char *srcbuf; |
| int ps=rfbServerFormat.bitsPerPixel/8; |
| int subsamp=subsampLevel2tjsubsamp[subsampLevel]; |
| unsigned long size=0; |
| int flags=0, pitch; |
| unsigned char *tmpbuf=NULL; |
| |
| if (rfbServerFormat.bitsPerPixel == 8) |
| return SendFullColorRect(cl, w, h); |
| |
| |
| if(ps<2) { |
| rfbLog("Error: JPEG requires 16-bit, 24-bit, or 32-bit pixel format.\n"); |
| return 0; |
| } |
| if(!j) { |
| if((j=tjInitCompress())==NULL) { |
| rfbLog("JPEG Error: %s\n", tjGetErrorStr()); return 0; |
| } |
| } |
| |
| if (tightAfterBufSize < TJBUFSIZE(w,h)) { |
| if (tightAfterBuf == NULL) |
| tightAfterBuf = (char *)xalloc(TJBUFSIZE(w,h)); |
| else |
| tightAfterBuf = (char *)xrealloc(tightAfterBuf, |
| TJBUFSIZE(w,h)); |
| if(!tightAfterBuf) { |
| rfbLog("Memory allocation failure!\n"); |
| return 0; |
| } |
| tightAfterBufSize = TJBUFSIZE(w,h); |
| } |
| |
| if (ps == 2) { |
| CARD16 *srcptr, pix; |
| unsigned char *dst; |
| int inRed, inGreen, inBlue, i, j; |
| |
| if((tmpbuf=(unsigned char *)malloc(w*h*3))==NULL) |
| rfbLog("Memory allocation failure!\n"); |
| srcptr = (CARD16 *) |
| &rfbScreen.pfbMemory[y * rfbScreen.paddedWidthInBytes + |
| x * ps]; |
| dst = tmpbuf; |
| for(j=0; j<h; j++) { |
| CARD16 *srcptr2=srcptr; |
| unsigned char *dst2=dst; |
| for(i=0; i<w; i++) { |
| pix = *srcptr2++; |
| inRed = (int) |
| (pix >> rfbServerFormat.redShift & rfbServerFormat.redMax); |
| inGreen = (int) |
| (pix >> rfbServerFormat.greenShift & rfbServerFormat.greenMax); |
| inBlue = (int) |
| (pix >> rfbServerFormat.blueShift & rfbServerFormat.blueMax); |
| *dst2++ = (CARD8)((inRed * 255 + rfbServerFormat.redMax / 2) / |
| rfbServerFormat.redMax); |
| *dst2++ = (CARD8)((inGreen * 255 + rfbServerFormat.greenMax / 2) / |
| rfbServerFormat.greenMax); |
| *dst2++ = (CARD8)((inBlue * 255 + rfbServerFormat.blueMax / 2) / |
| rfbServerFormat.blueMax); |
| } |
| srcptr+=rfbScreen.paddedWidthInBytes/ps; |
| dst+=w*3; |
| } |
| srcbuf = tmpbuf; |
| pitch = w*3; |
| ps = 3; |
| } else { |
| if(rfbServerFormat.bigEndian && ps==4) flags|=TJ_ALPHAFIRST; |
| if(rfbServerFormat.redShift==16 && rfbServerFormat.blueShift==0) |
| flags|=TJ_BGR; |
| if(rfbServerFormat.bigEndian) flags^=TJ_BGR; |
| srcbuf=(unsigned char *)&rfbScreen.pfbMemory[y * |
| rfbScreen.paddedWidthInBytes + x * ps]; |
| pitch=rfbScreen.paddedWidthInBytes; |
| } |
| |
| if(tjCompress(j, srcbuf, w, pitch, h, ps, (unsigned char *)tightAfterBuf, |
| &size, subsamp, quality, flags)==-1) { |
| rfbLog("JPEG Error: %s\n", tjGetErrorStr()); |
| if(tmpbuf) {free(tmpbuf); tmpbuf=NULL;} |
| return 0; |
| } |
| jpegDstDataLen=(int)size; |
| |
| if(tmpbuf) {free(tmpbuf); tmpbuf=NULL;} |
| |
| if (ublen + TIGHT_MIN_TO_COMPRESS + 1 > UPDATE_BUF_SIZE) { |
| if (!rfbSendUpdateBuf(cl)) |
| return FALSE; |
| } |
| |
| updateBuf[ublen++] = (char)(rfbTightJpeg << 4); |
| cl->rfbBytesSent[rfbEncodingTight]++; |
| |
| return SendCompressedData(cl, tightAfterBuf, jpegDstDataLen); |
| } |
