You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1901 lines
70 KiB
1901 lines
70 KiB
/*
|
|
* tight.c
|
|
*
|
|
* Routines to implement Tight Encoding
|
|
*
|
|
* Our Tight encoder is based roughly on the TurboVNC v0.6 encoder with some
|
|
* additional enhancements from TurboVNC 1.1. For lower compression levels,
|
|
* this encoder provides a tremendous reduction in CPU usage (and subsequently,
|
|
* an increase in throughput for CPU-limited environments) relative to the
|
|
* TightVNC encoder, whereas Compression Level 9 provides a low-bandwidth mode
|
|
* that behaves similarly to Compression Levels 5-9 in the old TightVNC
|
|
* encoder.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2010-2012 D. R. Commander. All Rights Reserved.
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
|
|
* USA.
|
|
*/
|
|
|
|
#include <rfb/rfb.h>
|
|
#include "private.h"
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
#include <png.h>
|
|
#endif
|
|
#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
|
|
|
|
/*
|
|
* There is so much access of the Tight encoding static data buffers
|
|
* that we resort to using thread local storage instead of having
|
|
* per-client data.
|
|
*/
|
|
#if LIBVNCSERVER_HAVE_LIBPTHREAD && LIBVNCSERVER_HAVE_TLS && !defined(TLS) && defined(__linux__)
|
|
#define TLS __thread
|
|
#endif
|
|
#ifndef TLS
|
|
#define TLS
|
|
#endif
|
|
|
|
/* This variable is set on every rfbSendRectEncodingTight() call. */
|
|
static TLS rfbBool usePixelFormat24 = FALSE;
|
|
|
|
|
|
/* 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;
|
|
int palMaxColorsWithJPEG;
|
|
} TIGHT_CONF;
|
|
|
|
static TIGHT_CONF tightConf[4] = {
|
|
{ 65536, 2048, 6, 0, 0, 0, 4, 24 }, // 0 (used only without JPEG)
|
|
{ 65536, 2048, 32, 1, 1, 1, 96, 24 }, // 1
|
|
{ 65536, 2048, 32, 3, 3, 2, 96, 96 }, // 2 (used only with JPEG)
|
|
{ 65536, 2048, 32, 7, 7, 5, 96, 256 } // 9
|
|
};
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
typedef struct TIGHT_PNG_CONF_s {
|
|
int png_zlib_level, png_filters;
|
|
} TIGHT_PNG_CONF;
|
|
|
|
static TIGHT_PNG_CONF tightPngConf[10] = {
|
|
{ 0, PNG_NO_FILTERS },
|
|
{ 1, PNG_NO_FILTERS },
|
|
{ 2, PNG_NO_FILTERS },
|
|
{ 3, PNG_NO_FILTERS },
|
|
{ 4, PNG_NO_FILTERS },
|
|
{ 5, PNG_ALL_FILTERS },
|
|
{ 6, PNG_ALL_FILTERS },
|
|
{ 7, PNG_ALL_FILTERS },
|
|
{ 8, PNG_ALL_FILTERS },
|
|
{ 9, PNG_ALL_FILTERS },
|
|
};
|
|
#endif
|
|
|
|
static TLS int compressLevel = 1;
|
|
static TLS int qualityLevel = 95;
|
|
static TLS int subsampLevel = TJ_444;
|
|
|
|
static const int subsampLevel2tjsubsamp[4] = {
|
|
TJ_444, TJ_420, TJ_422, TJ_GRAYSCALE
|
|
};
|
|
|
|
|
|
/* Stuff dealing with palettes. */
|
|
|
|
typedef struct COLOR_LIST_s {
|
|
struct COLOR_LIST_s *next;
|
|
int idx;
|
|
uint32_t 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;
|
|
|
|
/* TODO: move into rfbScreen struct */
|
|
static TLS int paletteNumColors = 0;
|
|
static TLS int paletteMaxColors = 0;
|
|
static TLS uint32_t monoBackground = 0;
|
|
static TLS uint32_t monoForeground = 0;
|
|
static TLS PALETTE palette;
|
|
|
|
/* Pointers to dynamically-allocated buffers. */
|
|
|
|
static TLS int tightBeforeBufSize = 0;
|
|
static TLS char *tightBeforeBuf = NULL;
|
|
|
|
static TLS int tightAfterBufSize = 0;
|
|
static TLS char *tightAfterBuf = NULL;
|
|
|
|
static TLS tjhandle j = NULL;
|
|
|
|
void rfbTightCleanup (rfbScreenInfoPtr screen)
|
|
{
|
|
if (tightBeforeBufSize) {
|
|
free (tightBeforeBuf);
|
|
tightBeforeBufSize = 0;
|
|
tightBeforeBuf = NULL;
|
|
}
|
|
if (tightAfterBufSize) {
|
|
free (tightAfterBuf);
|
|
tightAfterBufSize = 0;
|
|
tightAfterBuf = NULL;
|
|
}
|
|
if (j) tjDestroy(j);
|
|
}
|
|
|
|
|
|
/* Prototypes for static functions. */
|
|
|
|
static rfbBool SendRectEncodingTight(rfbClientPtr cl, int x, int y,
|
|
int w, int h);
|
|
static void FindBestSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t colorValue, int *w_ptr, int *h_ptr);
|
|
static void ExtendSolidArea (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t colorValue,
|
|
int *x_ptr, int *y_ptr, int *w_ptr, int *h_ptr);
|
|
static rfbBool CheckSolidTile (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t *colorPtr, rfbBool needSameColor);
|
|
static rfbBool CheckSolidTile8 (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t *colorPtr, rfbBool needSameColor);
|
|
static rfbBool CheckSolidTile16 (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t *colorPtr, rfbBool needSameColor);
|
|
static rfbBool CheckSolidTile32 (rfbClientPtr cl, int x, int y, int w, int h,
|
|
uint32_t *colorPtr, rfbBool needSameColor);
|
|
|
|
static rfbBool SendRectSimple (rfbClientPtr cl, int x, int y, int w, int h);
|
|
static rfbBool SendSubrect (rfbClientPtr cl, int x, int y, int w, int h);
|
|
static rfbBool SendTightHeader (rfbClientPtr cl, int x, int y, int w, int h);
|
|
|
|
static rfbBool SendSolidRect (rfbClientPtr cl);
|
|
static rfbBool SendMonoRect (rfbClientPtr cl, int x, int y, int w, int h);
|
|
static rfbBool SendIndexedRect (rfbClientPtr cl, int x, int y, int w, int h);
|
|
static rfbBool SendFullColorRect (rfbClientPtr cl, int x, int y, int w, int h);
|
|
|
|
static rfbBool CompressData (rfbClientPtr cl, int streamId, int dataLen,
|
|
int zlibLevel, int zlibStrategy);
|
|
static rfbBool 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, uint16_t *data, int w,
|
|
int pitch, int h);
|
|
static void FastFillPalette32 (rfbClientPtr cl, uint32_t *data, int w,
|
|
int pitch, int h);
|
|
|
|
static void PaletteReset (void);
|
|
static int PaletteInsert (uint32_t rgb, int numPixels, int bpp);
|
|
|
|
static void Pack24 (rfbClientPtr cl, char *buf, rfbPixelFormat *fmt,
|
|
int count);
|
|
|
|
static void EncodeIndexedRect16 (uint8_t *buf, int count);
|
|
static void EncodeIndexedRect32 (uint8_t *buf, int count);
|
|
|
|
static void EncodeMonoRect8 (uint8_t *buf, int w, int h);
|
|
static void EncodeMonoRect16 (uint8_t *buf, int w, int h);
|
|
static void EncodeMonoRect32 (uint8_t *buf, int w, int h);
|
|
|
|
static rfbBool SendJpegRect (rfbClientPtr cl, int x, int y, int w, int h,
|
|
int quality);
|
|
static void PrepareRowForImg(rfbClientPtr cl, uint8_t *dst, int x, int y, int count);
|
|
static void PrepareRowForImg24(rfbClientPtr cl, uint8_t *dst, int x, int y, int count);
|
|
static void PrepareRowForImg16(rfbClientPtr cl, uint8_t *dst, int x, int y, int count);
|
|
static void PrepareRowForImg32(rfbClientPtr cl, uint8_t *dst, int x, int y, int count);
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
static rfbBool SendPngRect(rfbClientPtr cl, int x, int y, int w, int h);
|
|
static rfbBool CanSendPngRect(rfbClientPtr cl, int w, int h);
|
|
#endif
|
|
|
|
/*
|
|
* Tight encoding implementation.
|
|
*/
|
|
|
|
int
|
|
rfbNumCodedRectsTight(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int 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;
|
|
}
|
|
}
|
|
|
|
rfbBool
|
|
rfbSendRectEncodingTight(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
cl->tightEncoding = rfbEncodingTight;
|
|
return SendRectEncodingTight(cl, x, y, w, h);
|
|
}
|
|
|
|
rfbBool
|
|
rfbSendRectEncodingTightPng(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
cl->tightEncoding = rfbEncodingTightPng;
|
|
return SendRectEncodingTight(cl, x, y, w, h);
|
|
}
|
|
|
|
|
|
rfbBool
|
|
SendRectEncodingTight(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
int nMaxRows;
|
|
uint32_t colorValue;
|
|
int dx, dy, dw, dh;
|
|
int x_best, y_best, w_best, h_best;
|
|
char *fbptr;
|
|
|
|
rfbSendUpdateBuf(cl);
|
|
|
|
compressLevel = cl->tightCompressLevel;
|
|
qualityLevel = cl->turboQualityLevel;
|
|
subsampLevel = cl->turboSubsampLevel;
|
|
|
|
/* We only allow compression levels that have a demonstrable performance
|
|
benefit. CL 0 with JPEG reduces CPU usage for workloads that have low
|
|
numbers of unique colors, but the same thing can be accomplished by
|
|
using CL 0 without JPEG (AKA "Lossless Tight.") For those same
|
|
low-color workloads, CL 2 can provide typically 20-40% better
|
|
compression than CL 1 (with a commensurate increase in CPU usage.) For
|
|
high-color workloads, CL 1 should always be used, as higher compression
|
|
levels increase CPU usage for these workloads without providing any
|
|
significant reduction in bandwidth. */
|
|
if (qualityLevel != -1) {
|
|
if (compressLevel < 1) compressLevel = 1;
|
|
if (compressLevel > 2) compressLevel = 2;
|
|
}
|
|
|
|
/* With JPEG disabled, CL 2 offers no significant bandwidth savings over
|
|
CL 1, so we don't include it. */
|
|
else if (compressLevel > 1) compressLevel = 1;
|
|
|
|
/* CL 9 (which maps internally to CL 3) is included mainly for backward
|
|
compatibility with TightVNC Compression Levels 5-9. It should be used
|
|
only in extremely low-bandwidth cases in which it can be shown to have a
|
|
benefit. For low-color workloads, it provides typically only 10-20%
|
|
better compression than CL 2 with JPEG and CL 1 without JPEG, and it
|
|
uses, on average, twice as much CPU time. */
|
|
if (compressLevel == 9) compressLevel = 3;
|
|
|
|
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 *)malloc(tightBeforeBufSize);
|
|
else
|
|
tightBeforeBuf = (char *)realloc(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(cl, dx, dy, dw, dh, &colorValue, FALSE)) {
|
|
|
|
if (subsampLevel == TJ_GRAYSCALE && qualityLevel != -1) {
|
|
uint32_t r = (colorValue >> 16) & 0xFF;
|
|
uint32_t g = (colorValue >> 8) & 0xFF;
|
|
uint32_t 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(cl, 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(cl, 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 &&
|
|
!SendRectEncodingTight(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 = (cl->scaledScreen->frameBuffer +
|
|
(cl->scaledScreen->paddedWidthInBytes * y_best) +
|
|
(x_best * (cl->scaledScreen->bitsPerPixel / 8)));
|
|
|
|
(*cl->translateFn)(cl->translateLookupTable, &cl->screen->serverFormat,
|
|
&cl->format, fbptr, tightBeforeBuf,
|
|
cl->scaledScreen->paddedWidthInBytes, 1, 1);
|
|
|
|
if (!SendSolidRect(cl))
|
|
return FALSE;
|
|
|
|
/* Send remaining rectangles (at right and bottom). */
|
|
|
|
if ( x_best + w_best != x + w &&
|
|
!SendRectEncodingTight(cl, x_best + w_best, y_best,
|
|
w - (x_best-x) - w_best, h_best) )
|
|
return FALSE;
|
|
if ( y_best + h_best != y + h &&
|
|
!SendRectEncodingTight(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(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h,
|
|
uint32_t colorValue,
|
|
int *w_ptr,
|
|
int *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(cl, 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(cl, 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(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h,
|
|
uint32_t colorValue,
|
|
int *x_ptr,
|
|
int *y_ptr,
|
|
int *w_ptr,
|
|
int *h_ptr)
|
|
{
|
|
int cx, cy;
|
|
|
|
/* Try to extend the area upwards. */
|
|
for ( cy = *y_ptr - 1;
|
|
cy >= y && CheckSolidTile(cl, *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(cl, *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(cl, 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(cl, 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 rfbBool CheckSolidTile(rfbClientPtr cl, int x, int y, int w, int h, uint32_t* colorPtr, rfbBool needSameColor)
|
|
{
|
|
switch(cl->screen->serverFormat.bitsPerPixel) {
|
|
case 32:
|
|
return CheckSolidTile32(cl, x, y, w, h, colorPtr, needSameColor);
|
|
case 16:
|
|
return CheckSolidTile16(cl, x, y, w, h, colorPtr, needSameColor);
|
|
default:
|
|
return CheckSolidTile8(cl, x, y, w, h, colorPtr, needSameColor);
|
|
}
|
|
}
|
|
|
|
|
|
#define DEFINE_CHECK_SOLID_FUNCTION(bpp) \
|
|
\
|
|
static rfbBool \
|
|
CheckSolidTile##bpp(rfbClientPtr cl, int x, int y, int w, int h, \
|
|
uint32_t* colorPtr, rfbBool needSameColor) \
|
|
{ \
|
|
uint##bpp##_t *fbptr; \
|
|
uint##bpp##_t colorValue; \
|
|
int dx, dy; \
|
|
\
|
|
fbptr = (uint##bpp##_t *)&cl->scaledScreen->frameBuffer \
|
|
[y * cl->scaledScreen->paddedWidthInBytes + x * (bpp/8)]; \
|
|
\
|
|
colorValue = *fbptr; \
|
|
if (needSameColor && (uint32_t)colorValue != *colorPtr) \
|
|
return FALSE; \
|
|
\
|
|
for (dy = 0; dy < h; dy++) { \
|
|
for (dx = 0; dx < w; dx++) { \
|
|
if (colorValue != fbptr[dx]) \
|
|
return FALSE; \
|
|
} \
|
|
fbptr = (uint##bpp##_t *)((uint8_t *)fbptr \
|
|
+ cl->scaledScreen->paddedWidthInBytes); \
|
|
} \
|
|
\
|
|
*colorPtr = (uint32_t)colorValue; \
|
|
return TRUE; \
|
|
}
|
|
|
|
DEFINE_CHECK_SOLID_FUNCTION(8)
|
|
DEFINE_CHECK_SOLID_FUNCTION(16)
|
|
DEFINE_CHECK_SOLID_FUNCTION(32)
|
|
|
|
static rfbBool
|
|
SendRectSimple(rfbClientPtr cl, int x, int y, int w, int 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 *)malloc(tightBeforeBufSize);
|
|
else
|
|
tightBeforeBuf = (char *)realloc(tightBeforeBuf,
|
|
tightBeforeBufSize);
|
|
}
|
|
|
|
if (tightAfterBufSize < maxAfterSize) {
|
|
tightAfterBufSize = maxAfterSize;
|
|
if (tightAfterBuf == NULL)
|
|
tightAfterBuf = (char *)malloc(tightAfterBufSize);
|
|
else
|
|
tightAfterBuf = (char *)realloc(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 rfbBool
|
|
SendSubrect(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
char *fbptr;
|
|
rfbBool success = FALSE;
|
|
|
|
/* Send pending data if there is more than 128 bytes. */
|
|
if (cl->ublen > 128) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
|
|
if (!SendTightHeader(cl, x, y, w, h))
|
|
return FALSE;
|
|
|
|
fbptr = (cl->scaledScreen->frameBuffer
|
|
+ (cl->scaledScreen->paddedWidthInBytes * y)
|
|
+ (x * (cl->scaledScreen->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 = tightConf[compressLevel].palMaxColorsWithJPEG;
|
|
if ( paletteMaxColors < 2 &&
|
|
w * h >= tightConf[compressLevel].monoMinRectSize ) {
|
|
paletteMaxColors = 2;
|
|
}
|
|
|
|
if (cl->format.bitsPerPixel == cl->screen->serverFormat.bitsPerPixel &&
|
|
cl->format.redMax == cl->screen->serverFormat.redMax &&
|
|
cl->format.greenMax == cl->screen->serverFormat.greenMax &&
|
|
cl->format.blueMax == cl->screen->serverFormat.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, (uint16_t *)fbptr, w,
|
|
cl->scaledScreen->paddedWidthInBytes / 2, h);
|
|
break;
|
|
default:
|
|
FastFillPalette32(cl, (uint32_t *)fbptr, w,
|
|
cl->scaledScreen->paddedWidthInBytes / 4, h);
|
|
}
|
|
|
|
if(paletteNumColors != 0 || qualityLevel == -1) {
|
|
(*cl->translateFn)(cl->translateLookupTable,
|
|
&cl->screen->serverFormat, &cl->format, fbptr,
|
|
tightBeforeBuf,
|
|
cl->scaledScreen->paddedWidthInBytes, w, h);
|
|
}
|
|
}
|
|
else {
|
|
(*cl->translateFn)(cl->translateLookupTable, &cl->screen->serverFormat,
|
|
&cl->format, fbptr, tightBeforeBuf,
|
|
cl->scaledScreen->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, x, y, w, h);
|
|
}
|
|
break;
|
|
case 1:
|
|
/* Solid rectangle */
|
|
success = SendSolidRect(cl);
|
|
break;
|
|
case 2:
|
|
/* Two-color rectangle */
|
|
success = SendMonoRect(cl, x, y, w, h);
|
|
break;
|
|
default:
|
|
/* Up to 256 different colors */
|
|
success = SendIndexedRect(cl, x, y, w, h);
|
|
}
|
|
return success;
|
|
}
|
|
|
|
static rfbBool
|
|
SendTightHeader(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
rfbFramebufferUpdateRectHeader rect;
|
|
|
|
if (cl->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(cl->tightEncoding);
|
|
|
|
memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,
|
|
sz_rfbFramebufferUpdateRectHeader);
|
|
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
|
|
|
|
rfbStatRecordEncodingSent(cl, cl->tightEncoding,
|
|
sz_rfbFramebufferUpdateRectHeader,
|
|
sz_rfbFramebufferUpdateRectHeader
|
|
+ w * (cl->format.bitsPerPixel / 8) * h);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Subencoding implementations.
|
|
*/
|
|
|
|
static rfbBool
|
|
SendSolidRect(rfbClientPtr cl)
|
|
{
|
|
int len;
|
|
|
|
if (usePixelFormat24) {
|
|
Pack24(cl, tightBeforeBuf, &cl->format, 1);
|
|
len = 3;
|
|
} else
|
|
len = cl->format.bitsPerPixel / 8;
|
|
|
|
if (cl->ublen + 1 + len > UPDATE_BUF_SIZE) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
|
|
cl->updateBuf[cl->ublen++] = (char)(rfbTightFill << 4);
|
|
memcpy (&cl->updateBuf[cl->ublen], tightBeforeBuf, len);
|
|
cl->ublen += len;
|
|
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, len + 1);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static rfbBool
|
|
SendMonoRect(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
int streamId = 1;
|
|
int paletteLen, dataLen;
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
if (CanSendPngRect(cl, w, h)) {
|
|
/* TODO: setup palette maybe */
|
|
return SendPngRect(cl, x, y, w, h);
|
|
/* TODO: destroy palette maybe */
|
|
}
|
|
#endif
|
|
|
|
if ( cl->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 &&
|
|
cl->tightEncoding != rfbEncodingTightPng)
|
|
cl->updateBuf[cl->ublen++] =
|
|
(char)((rfbTightNoZlib | rfbTightExplicitFilter) << 4);
|
|
else
|
|
cl->updateBuf[cl->ublen++] = (streamId | rfbTightExplicitFilter) << 4;
|
|
cl->updateBuf[cl->ublen++] = rfbTightFilterPalette;
|
|
cl->updateBuf[cl->ublen++] = 1;
|
|
|
|
/* Prepare palette, convert image. */
|
|
switch (cl->format.bitsPerPixel) {
|
|
|
|
case 32:
|
|
EncodeMonoRect32((uint8_t *)tightBeforeBuf, w, h);
|
|
|
|
((uint32_t *)tightAfterBuf)[0] = monoBackground;
|
|
((uint32_t *)tightAfterBuf)[1] = monoForeground;
|
|
if (usePixelFormat24) {
|
|
Pack24(cl, tightAfterBuf, &cl->format, 2);
|
|
paletteLen = 6;
|
|
} else
|
|
paletteLen = 8;
|
|
|
|
memcpy(&cl->updateBuf[cl->ublen], tightAfterBuf, paletteLen);
|
|
cl->ublen += paletteLen;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 3 + paletteLen);
|
|
break;
|
|
|
|
case 16:
|
|
EncodeMonoRect16((uint8_t *)tightBeforeBuf, w, h);
|
|
|
|
((uint16_t *)tightAfterBuf)[0] = (uint16_t)monoBackground;
|
|
((uint16_t *)tightAfterBuf)[1] = (uint16_t)monoForeground;
|
|
|
|
memcpy(&cl->updateBuf[cl->ublen], tightAfterBuf, 4);
|
|
cl->ublen += 4;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 7);
|
|
break;
|
|
|
|
default:
|
|
EncodeMonoRect8((uint8_t *)tightBeforeBuf, w, h);
|
|
|
|
cl->updateBuf[cl->ublen++] = (char)monoBackground;
|
|
cl->updateBuf[cl->ublen++] = (char)monoForeground;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 5);
|
|
}
|
|
|
|
return CompressData(cl, streamId, dataLen,
|
|
tightConf[compressLevel].monoZlibLevel,
|
|
Z_DEFAULT_STRATEGY);
|
|
}
|
|
|
|
static rfbBool
|
|
SendIndexedRect(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
int streamId = 2;
|
|
int i, entryLen;
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
if (CanSendPngRect(cl, w, h)) {
|
|
return SendPngRect(cl, x, y, w, h);
|
|
}
|
|
#endif
|
|
|
|
if ( cl->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 &&
|
|
cl->tightEncoding != rfbEncodingTightPng)
|
|
cl->updateBuf[cl->ublen++] =
|
|
(char)((rfbTightNoZlib | rfbTightExplicitFilter) << 4);
|
|
else
|
|
cl->updateBuf[cl->ublen++] = (streamId | rfbTightExplicitFilter) << 4;
|
|
cl->updateBuf[cl->ublen++] = rfbTightFilterPalette;
|
|
cl->updateBuf[cl->ublen++] = (char)(paletteNumColors - 1);
|
|
|
|
/* Prepare palette, convert image. */
|
|
switch (cl->format.bitsPerPixel) {
|
|
|
|
case 32:
|
|
EncodeIndexedRect32((uint8_t *)tightBeforeBuf, w * h);
|
|
|
|
for (i = 0; i < paletteNumColors; i++) {
|
|
((uint32_t *)tightAfterBuf)[i] =
|
|
palette.entry[i].listNode->rgb;
|
|
}
|
|
if (usePixelFormat24) {
|
|
Pack24(cl, tightAfterBuf, &cl->format, paletteNumColors);
|
|
entryLen = 3;
|
|
} else
|
|
entryLen = 4;
|
|
|
|
memcpy(&cl->updateBuf[cl->ublen], tightAfterBuf,
|
|
paletteNumColors * entryLen);
|
|
cl->ublen += paletteNumColors * entryLen;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding,
|
|
3 + paletteNumColors * entryLen);
|
|
break;
|
|
|
|
case 16:
|
|
EncodeIndexedRect16((uint8_t *)tightBeforeBuf, w * h);
|
|
|
|
for (i = 0; i < paletteNumColors; i++) {
|
|
((uint16_t *)tightAfterBuf)[i] =
|
|
(uint16_t)palette.entry[i].listNode->rgb;
|
|
}
|
|
|
|
memcpy(&cl->updateBuf[cl->ublen], tightAfterBuf, paletteNumColors * 2);
|
|
cl->ublen += paletteNumColors * 2;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding,
|
|
3 + paletteNumColors * 2);
|
|
break;
|
|
|
|
default:
|
|
return FALSE; /* Should never happen. */
|
|
}
|
|
|
|
return CompressData(cl, streamId, w * h,
|
|
tightConf[compressLevel].idxZlibLevel,
|
|
Z_DEFAULT_STRATEGY);
|
|
}
|
|
|
|
static rfbBool
|
|
SendFullColorRect(rfbClientPtr cl,
|
|
int x,
|
|
int y,
|
|
int w,
|
|
int h)
|
|
{
|
|
int streamId = 0;
|
|
int len;
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
if (CanSendPngRect(cl, w, h)) {
|
|
return SendPngRect(cl, x, y, w, h);
|
|
}
|
|
#endif
|
|
|
|
if (cl->ublen + TIGHT_MIN_TO_COMPRESS + 1 > UPDATE_BUF_SIZE) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
|
|
if (tightConf[compressLevel].rawZlibLevel == 0 &&
|
|
cl->tightEncoding != rfbEncodingTightPng)
|
|
cl->updateBuf[cl->ublen++] = (char)(rfbTightNoZlib << 4);
|
|
else
|
|
cl->updateBuf[cl->ublen++] = 0x00; /* stream id = 0, no flushing, no filter */
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
|
|
if (usePixelFormat24) {
|
|
Pack24(cl, 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 rfbBool
|
|
CompressData(rfbClientPtr cl,
|
|
int streamId,
|
|
int dataLen,
|
|
int zlibLevel,
|
|
int zlibStrategy)
|
|
{
|
|
z_streamp pz;
|
|
int err;
|
|
|
|
if (dataLen < TIGHT_MIN_TO_COMPRESS) {
|
|
memcpy(&cl->updateBuf[cl->ublen], tightBeforeBuf, dataLen);
|
|
cl->ublen += dataLen;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 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 rfbBool SendCompressedData(rfbClientPtr cl, char *buf,
|
|
int compressedLen)
|
|
{
|
|
int i, portionLen;
|
|
|
|
cl->updateBuf[cl->ublen++] = compressedLen & 0x7F;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
if (compressedLen > 0x7F) {
|
|
cl->updateBuf[cl->ublen-1] |= 0x80;
|
|
cl->updateBuf[cl->ublen++] = compressedLen >> 7 & 0x7F;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
if (compressedLen > 0x3FFF) {
|
|
cl->updateBuf[cl->ublen-1] |= 0x80;
|
|
cl->updateBuf[cl->ublen++] = compressedLen >> 14 & 0xFF;
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
}
|
|
}
|
|
|
|
portionLen = UPDATE_BUF_SIZE;
|
|
for (i = 0; i < compressedLen; i += portionLen) {
|
|
if (i + portionLen > compressedLen) {
|
|
portionLen = compressedLen - i;
|
|
}
|
|
if (cl->ublen + portionLen > UPDATE_BUF_SIZE) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
memcpy(&cl->updateBuf[cl->ublen], &buf[i], portionLen);
|
|
cl->ublen += portionLen;
|
|
}
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, compressedLen);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Code to determine how many different colors used in rectangle.
|
|
*/
|
|
|
|
static void
|
|
FillPalette8(int count)
|
|
{
|
|
uint8_t *data = (uint8_t *)tightBeforeBuf;
|
|
uint8_t 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 = (uint32_t)c0;
|
|
monoForeground = (uint32_t)c1;
|
|
} else {
|
|
monoBackground = (uint32_t)c1;
|
|
monoForeground = (uint32_t)c0;
|
|
}
|
|
paletteNumColors = 2; /* Two colors */
|
|
}
|
|
}
|
|
|
|
|
|
#define DEFINE_FILL_PALETTE_FUNCTION(bpp) \
|
|
\
|
|
static void \
|
|
FillPalette##bpp(int count) { \
|
|
uint##bpp##_t *data = (uint##bpp##_t *)tightBeforeBuf; \
|
|
uint##bpp##_t 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 = (uint32_t)c0; \
|
|
monoForeground = (uint32_t)c1; \
|
|
} else { \
|
|
monoBackground = (uint32_t)c1; \
|
|
monoForeground = (uint32_t)c0; \
|
|
} \
|
|
paletteNumColors = 2; /* Two colors */ \
|
|
return; \
|
|
} \
|
|
\
|
|
PaletteReset(); \
|
|
PaletteInsert (c0, (uint32_t)n0, bpp); \
|
|
PaletteInsert (c1, (uint32_t)n1, bpp); \
|
|
\
|
|
ni = 1; \
|
|
for (i++; i < count; i++) { \
|
|
if (data[i] == ci) { \
|
|
ni++; \
|
|
} else { \
|
|
if (!PaletteInsert (ci, (uint32_t)ni, bpp)) \
|
|
return; \
|
|
ci = data[i]; \
|
|
ni = 1; \
|
|
} \
|
|
} \
|
|
PaletteInsert (ci, (uint32_t)ni, bpp); \
|
|
}
|
|
|
|
DEFINE_FILL_PALETTE_FUNCTION(16)
|
|
DEFINE_FILL_PALETTE_FUNCTION(32)
|
|
|
|
#define DEFINE_FAST_FILL_PALETTE_FUNCTION(bpp) \
|
|
\
|
|
static void \
|
|
FastFillPalette##bpp(rfbClientPtr cl, uint##bpp##_t *data, int w, \
|
|
int pitch, int h) \
|
|
{ \
|
|
uint##bpp##_t c0, c1, ci, mask, c0t, c1t, cit; \
|
|
int i, j, i2 = 0, j2, n0, n1, ni; \
|
|
\
|
|
if (cl->translateFn != rfbTranslateNone) { \
|
|
mask = cl->screen->serverFormat.redMax \
|
|
<< cl->screen->serverFormat.redShift; \
|
|
mask |= cl->screen->serverFormat.greenMax \
|
|
<< cl->screen->serverFormat.greenShift; \
|
|
mask |= cl->screen->serverFormat.blueMax \
|
|
<< cl->screen->serverFormat.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, \
|
|
&cl->screen->serverFormat, &cl->format, \
|
|
(char *)&c0, (char *)&c0t, bpp/8, 1, 1); \
|
|
(*cl->translateFn)(cl->translateLookupTable, \
|
|
&cl->screen->serverFormat, &cl->format, \
|
|
(char *)&c1, (char *)&c1t, bpp/8, 1, 1); \
|
|
if (j2 >= h) { \
|
|
if (n0 > n1) { \
|
|
monoBackground = (uint32_t)c0t; \
|
|
monoForeground = (uint32_t)c1t; \
|
|
} else { \
|
|
monoBackground = (uint32_t)c1t; \
|
|
monoForeground = (uint32_t)c0t; \
|
|
} \
|
|
paletteNumColors = 2; /* Two colors */ \
|
|
return; \
|
|
} \
|
|
\
|
|
PaletteReset(); \
|
|
PaletteInsert (c0t, (uint32_t)n0, bpp); \
|
|
PaletteInsert (c1t, (uint32_t)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, \
|
|
&cl->screen->serverFormat, \
|
|
&cl->format, (char *)&ci, \
|
|
(char *)&cit, bpp/8, 1, 1); \
|
|
if (!PaletteInsert (cit, (uint32_t)ni, bpp)) \
|
|
return; \
|
|
ci = data[j * pitch + i] & mask; \
|
|
ni = 1; \
|
|
} \
|
|
} \
|
|
i2 = 0; \
|
|
} \
|
|
\
|
|
(*cl->translateFn)(cl->translateLookupTable, \
|
|
&cl->screen->serverFormat, &cl->format, \
|
|
(char *)&ci, (char *)&cit, bpp/8, 1, 1); \
|
|
PaletteInsert (cit, (uint32_t)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(uint32_t 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(rfbClientPtr cl,
|
|
char *buf,
|
|
rfbPixelFormat *fmt,
|
|
int count)
|
|
{
|
|
uint32_t *buf32;
|
|
uint32_t pix;
|
|
int r_shift, g_shift, b_shift;
|
|
|
|
buf32 = (uint32_t *)buf;
|
|
|
|
if (!cl->screen->serverFormat.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(uint8_t *buf, int count) { \
|
|
COLOR_LIST *pnode; \
|
|
uint##bpp##_t *src; \
|
|
uint##bpp##_t rgb; \
|
|
int rep = 0; \
|
|
\
|
|
src = (uint##bpp##_t *) buf; \
|
|
\
|
|
while (count--) { \
|
|
rgb = *src++; \
|
|
while (count && *src == rgb) { \
|
|
rep++, src++, count--; \
|
|
} \
|
|
pnode = palette.hash[HASH_FUNC##bpp(rgb)]; \
|
|
while (pnode != NULL) { \
|
|
if ((uint##bpp##_t)pnode->rgb == rgb) { \
|
|
*buf++ = (uint8_t)pnode->idx; \
|
|
while (rep) { \
|
|
*buf++ = (uint8_t)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(uint8_t *buf, int w, int h) { \
|
|
uint##bpp##_t *ptr; \
|
|
uint##bpp##_t bg; \
|
|
unsigned int value, mask; \
|
|
int aligned_width; \
|
|
int x, y, bg_bits; \
|
|
\
|
|
ptr = (uint##bpp##_t *) buf; \
|
|
bg = (uint##bpp##_t) 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++ = (uint8_t)value; \
|
|
} \
|
|
\
|
|
mask = 0x80; \
|
|
value = 0; \
|
|
if (x >= w) \
|
|
continue; \
|
|
\
|
|
for (; x < w; x++) { \
|
|
if (*ptr++ != bg) { \
|
|
value |= mask; \
|
|
} \
|
|
mask >>= 1; \
|
|
} \
|
|
*buf++ = (uint8_t)value; \
|
|
} \
|
|
}
|
|
|
|
DEFINE_MONO_ENCODE_FUNCTION(8)
|
|
DEFINE_MONO_ENCODE_FUNCTION(16)
|
|
DEFINE_MONO_ENCODE_FUNCTION(32)
|
|
|
|
|
|
/*
|
|
* JPEG compression stuff.
|
|
*/
|
|
|
|
static rfbBool
|
|
SendJpegRect(rfbClientPtr cl, int x, int y, int w, int h, int quality)
|
|
{
|
|
unsigned char *srcbuf;
|
|
int ps = cl->screen->serverFormat.bitsPerPixel / 8;
|
|
int subsamp = subsampLevel2tjsubsamp[subsampLevel];
|
|
unsigned long size = 0;
|
|
int flags = 0, pitch;
|
|
unsigned char *tmpbuf = NULL;
|
|
|
|
if (cl->screen->serverFormat.bitsPerPixel == 8)
|
|
return SendFullColorRect(cl, x, y, 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 *)malloc(TJBUFSIZE(w, h));
|
|
else
|
|
tightAfterBuf = (char *)realloc(tightAfterBuf,
|
|
TJBUFSIZE(w, h));
|
|
if (!tightAfterBuf) {
|
|
rfbLog("Memory allocation failure!\n");
|
|
return 0;
|
|
}
|
|
tightAfterBufSize = TJBUFSIZE(w, h);
|
|
}
|
|
|
|
if (ps == 2) {
|
|
uint16_t *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 = (uint16_t *)&cl->scaledScreen->frameBuffer
|
|
[y * cl->scaledScreen->paddedWidthInBytes + x * ps];
|
|
dst = tmpbuf;
|
|
for(j = 0; j < h; j++) {
|
|
uint16_t *srcptr2 = srcptr;
|
|
unsigned char *dst2 = dst;
|
|
for (i = 0; i < w; i++) {
|
|
pix = *srcptr2++;
|
|
inRed = (int) (pix >> cl->screen->serverFormat.redShift
|
|
& cl->screen->serverFormat.redMax);
|
|
inGreen = (int) (pix >> cl->screen->serverFormat.greenShift
|
|
& cl->screen->serverFormat.greenMax);
|
|
inBlue = (int) (pix >> cl->screen->serverFormat.blueShift
|
|
& cl->screen->serverFormat.blueMax);
|
|
*dst2++ = (uint8_t)((inRed * 255
|
|
+ cl->screen->serverFormat.redMax / 2)
|
|
/ cl->screen->serverFormat.redMax);
|
|
*dst2++ = (uint8_t)((inGreen * 255
|
|
+ cl->screen->serverFormat.greenMax / 2)
|
|
/ cl->screen->serverFormat.greenMax);
|
|
*dst2++ = (uint8_t)((inBlue * 255
|
|
+ cl->screen->serverFormat.blueMax / 2)
|
|
/ cl->screen->serverFormat.blueMax);
|
|
}
|
|
srcptr += cl->scaledScreen->paddedWidthInBytes / ps;
|
|
dst += w * 3;
|
|
}
|
|
srcbuf = tmpbuf;
|
|
pitch = w * 3;
|
|
ps = 3;
|
|
} else {
|
|
if (cl->screen->serverFormat.bigEndian && ps == 4)
|
|
flags |= TJ_ALPHAFIRST;
|
|
if (cl->screen->serverFormat.redShift == 16
|
|
&& cl->screen->serverFormat.blueShift == 0)
|
|
flags |= TJ_BGR;
|
|
if (cl->screen->serverFormat.bigEndian)
|
|
flags ^= TJ_BGR;
|
|
pitch = cl->scaledScreen->paddedWidthInBytes;
|
|
srcbuf = (unsigned char *)&cl->scaledScreen->frameBuffer
|
|
[y * pitch + x * ps];
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (tmpbuf) {
|
|
free(tmpbuf);
|
|
tmpbuf = NULL;
|
|
}
|
|
|
|
if (cl->ublen + TIGHT_MIN_TO_COMPRESS + 1 > UPDATE_BUF_SIZE) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
|
|
cl->updateBuf[cl->ublen++] = (char)(rfbTightJpeg << 4);
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
|
|
return SendCompressedData(cl, tightAfterBuf, (int)size);
|
|
}
|
|
|
|
static void
|
|
PrepareRowForImg(rfbClientPtr cl,
|
|
uint8_t *dst,
|
|
int x,
|
|
int y,
|
|
int count)
|
|
{
|
|
if (cl->screen->serverFormat.bitsPerPixel == 32) {
|
|
if ( cl->screen->serverFormat.redMax == 0xFF &&
|
|
cl->screen->serverFormat.greenMax == 0xFF &&
|
|
cl->screen->serverFormat.blueMax == 0xFF ) {
|
|
PrepareRowForImg24(cl, dst, x, y, count);
|
|
} else {
|
|
PrepareRowForImg32(cl, dst, x, y, count);
|
|
}
|
|
} else {
|
|
/* 16 bpp assumed. */
|
|
PrepareRowForImg16(cl, dst, x, y, count);
|
|
}
|
|
}
|
|
|
|
static void
|
|
PrepareRowForImg24(rfbClientPtr cl,
|
|
uint8_t *dst,
|
|
int x,
|
|
int y,
|
|
int count)
|
|
{
|
|
uint32_t *fbptr;
|
|
uint32_t pix;
|
|
|
|
fbptr = (uint32_t *)
|
|
&cl->scaledScreen->frameBuffer[y * cl->scaledScreen->paddedWidthInBytes + x * 4];
|
|
|
|
while (count--) {
|
|
pix = *fbptr++;
|
|
*dst++ = (uint8_t)(pix >> cl->screen->serverFormat.redShift);
|
|
*dst++ = (uint8_t)(pix >> cl->screen->serverFormat.greenShift);
|
|
*dst++ = (uint8_t)(pix >> cl->screen->serverFormat.blueShift);
|
|
}
|
|
}
|
|
|
|
#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp) \
|
|
\
|
|
static void \
|
|
PrepareRowForImg##bpp(rfbClientPtr cl, uint8_t *dst, int x, int y, int count) { \
|
|
uint##bpp##_t *fbptr; \
|
|
uint##bpp##_t pix; \
|
|
int inRed, inGreen, inBlue; \
|
|
\
|
|
fbptr = (uint##bpp##_t *) \
|
|
&cl->scaledScreen->frameBuffer[y * cl->scaledScreen->paddedWidthInBytes + \
|
|
x * (bpp / 8)]; \
|
|
\
|
|
while (count--) { \
|
|
pix = *fbptr++; \
|
|
\
|
|
inRed = (int) \
|
|
(pix >> cl->screen->serverFormat.redShift & cl->screen->serverFormat.redMax); \
|
|
inGreen = (int) \
|
|
(pix >> cl->screen->serverFormat.greenShift & cl->screen->serverFormat.greenMax); \
|
|
inBlue = (int) \
|
|
(pix >> cl->screen->serverFormat.blueShift & cl->screen->serverFormat.blueMax); \
|
|
\
|
|
*dst++ = (uint8_t)((inRed * 255 + cl->screen->serverFormat.redMax / 2) / \
|
|
cl->screen->serverFormat.redMax); \
|
|
*dst++ = (uint8_t)((inGreen * 255 + cl->screen->serverFormat.greenMax / 2) / \
|
|
cl->screen->serverFormat.greenMax); \
|
|
*dst++ = (uint8_t)((inBlue * 255 + cl->screen->serverFormat.blueMax / 2) / \
|
|
cl->screen->serverFormat.blueMax); \
|
|
} \
|
|
}
|
|
|
|
DEFINE_JPEG_GET_ROW_FUNCTION(16)
|
|
DEFINE_JPEG_GET_ROW_FUNCTION(32)
|
|
|
|
/*
|
|
* PNG compression stuff.
|
|
*/
|
|
|
|
#ifdef LIBVNCSERVER_HAVE_LIBPNG
|
|
|
|
static TLS int pngDstDataLen = 0;
|
|
|
|
static rfbBool CanSendPngRect(rfbClientPtr cl, int w, int h) {
|
|
if (cl->tightEncoding != rfbEncodingTightPng) {
|
|
return FALSE;
|
|
}
|
|
|
|
if ( cl->screen->serverFormat.bitsPerPixel == 8 ||
|
|
cl->format.bitsPerPixel == 8) {
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void pngWriteData(png_structp png_ptr, png_bytep data,
|
|
png_size_t length)
|
|
{
|
|
#if 0
|
|
rfbClientPtr cl = png_get_io_ptr(png_ptr);
|
|
|
|
buffer_reserve(&vs->tight.png, vs->tight.png.offset + length);
|
|
memcpy(vs->tight.png.buffer + vs->tight.png.offset, data, length);
|
|
#endif
|
|
memcpy(tightAfterBuf + pngDstDataLen, data, length);
|
|
|
|
pngDstDataLen += length;
|
|
}
|
|
|
|
static void pngFlushData(png_structp png_ptr)
|
|
{
|
|
}
|
|
|
|
|
|
static void *pngMalloc(png_structp png_ptr, png_size_t size)
|
|
{
|
|
return malloc(size);
|
|
}
|
|
|
|
static void pngFree(png_structp png_ptr, png_voidp ptr)
|
|
{
|
|
free(ptr);
|
|
}
|
|
|
|
static rfbBool SendPngRect(rfbClientPtr cl, int x, int y, int w, int h) {
|
|
/* rfbLog(">> SendPngRect x:%d, y:%d, w:%d, h:%d\n", x, y, w, h); */
|
|
|
|
png_byte color_type;
|
|
png_structp png_ptr;
|
|
png_infop info_ptr;
|
|
png_colorp png_palette = NULL;
|
|
int level = tightPngConf[cl->tightCompressLevel].png_zlib_level;
|
|
int filters = tightPngConf[cl->tightCompressLevel].png_filters;
|
|
uint8_t *buf;
|
|
int dy;
|
|
|
|
pngDstDataLen = 0;
|
|
|
|
png_ptr = png_create_write_struct_2(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL,
|
|
NULL, pngMalloc, pngFree);
|
|
|
|
if (png_ptr == NULL)
|
|
return FALSE;
|
|
|
|
info_ptr = png_create_info_struct(png_ptr);
|
|
|
|
if (info_ptr == NULL) {
|
|
png_destroy_write_struct(&png_ptr, NULL);
|
|
return FALSE;
|
|
}
|
|
|
|
png_set_write_fn(png_ptr, (void *) cl, pngWriteData, pngFlushData);
|
|
png_set_compression_level(png_ptr, level);
|
|
png_set_filter(png_ptr, PNG_FILTER_TYPE_DEFAULT, filters);
|
|
|
|
#if 0
|
|
/* TODO: */
|
|
if (palette) {
|
|
color_type = PNG_COLOR_TYPE_PALETTE;
|
|
} else {
|
|
color_type = PNG_COLOR_TYPE_RGB;
|
|
}
|
|
#else
|
|
color_type = PNG_COLOR_TYPE_RGB;
|
|
#endif
|
|
png_set_IHDR(png_ptr, info_ptr, w, h,
|
|
8, color_type, PNG_INTERLACE_NONE,
|
|
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
|
|
|
|
#if 0
|
|
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
|
struct palette_cb_priv priv;
|
|
|
|
png_palette = pngMalloc(png_ptr, sizeof(*png_palette) *
|
|
palette_size(palette));
|
|
|
|
priv.vs = vs;
|
|
priv.png_palette = png_palette;
|
|
palette_iter(palette, write_png_palette, &priv);
|
|
|
|
png_set_PLTE(png_ptr, info_ptr, png_palette, palette_size(palette));
|
|
|
|
offset = vs->tight.tight.offset;
|
|
if (vs->clientds.pf.bytes_per_pixel == 4) {
|
|
tight_encode_indexed_rect32(vs->tight.tight.buffer, w * h, palette);
|
|
} else {
|
|
tight_encode_indexed_rect16(vs->tight.tight.buffer, w * h, palette);
|
|
}
|
|
}
|
|
|
|
buffer_reserve(&vs->tight.png, 2048);
|
|
#endif
|
|
|
|
png_write_info(png_ptr, info_ptr);
|
|
buf = malloc(w * 3);
|
|
for (dy = 0; dy < h; dy++)
|
|
{
|
|
#if 0
|
|
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
|
memcpy(buf, vs->tight.tight.buffer + (dy * w), w);
|
|
} else {
|
|
PrepareRowForImg(cl, buf, x, y + dy, w);
|
|
}
|
|
#else
|
|
PrepareRowForImg(cl, buf, x, y + dy, w);
|
|
#endif
|
|
png_write_row(png_ptr, buf);
|
|
}
|
|
free(buf);
|
|
|
|
png_write_end(png_ptr, NULL);
|
|
|
|
if (color_type == PNG_COLOR_TYPE_PALETTE) {
|
|
pngFree(png_ptr, png_palette);
|
|
}
|
|
|
|
png_destroy_write_struct(&png_ptr, &info_ptr);
|
|
|
|
/* done v */
|
|
|
|
if (cl->ublen + TIGHT_MIN_TO_COMPRESS + 1 > UPDATE_BUF_SIZE) {
|
|
if (!rfbSendUpdateBuf(cl))
|
|
return FALSE;
|
|
}
|
|
|
|
cl->updateBuf[cl->ublen++] = (char)(rfbTightPng << 4);
|
|
rfbStatRecordEncodingSentAdd(cl, cl->tightEncoding, 1);
|
|
|
|
/* rfbLog("<< SendPngRect\n"); */
|
|
return SendCompressedData(cl, tightAfterBuf, pngDstDataLen);
|
|
}
|
|
#endif
|