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fac983d5a4a23fc6050782d05a14141d4afd5f6b
krfb/libvncserver/cursor.c
George Kiagiadakis fac983d5a4 Import a fork of libvncserver 0.9.7. 
This is currently required to be able to split off the event processing code
in small functions so that it is possible to integrate libvncserver's event
loop code with Qt's event loop properly. This is also what vino does; the whole
event loop integration idea was taken from there.

svn path=/trunk/KDE/kdenetwork/krfb/; revision=1195283
2010-11-10 18:57:07 +00:00

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/*
* cursor.c - support for cursor shape updates.
*/
/*
* 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 <rfb/rfb.h>
#include <rfb/rfbregion.h>
#include "private.h"
void rfbScaledScreenUpdate(rfbScreenInfoPtr screen, int x1, int y1, int x2, int y2);
/*
* Send cursor shape either in X-style format or in client pixel format.
*/
rfbBool
rfbSendCursorShape(rfbClientPtr cl)
{
rfbCursorPtr pCursor;
rfbFramebufferUpdateRectHeader rect;
rfbXCursorColors colors;
int saved_ublen;
int bitmapRowBytes, maskBytes, dataBytes;
int i, j;
uint8_t *bitmapData;
uint8_t bitmapByte;
/* TODO: scale the cursor data to the correct size */
pCursor = cl->screen->getCursorPtr(cl);
/*if(!pCursor) return TRUE;*/
if (cl->useRichCursorEncoding) {
if(pCursor && !pCursor->richSource)
rfbMakeRichCursorFromXCursor(cl->screen,pCursor);
rect.encoding = Swap32IfLE(rfbEncodingRichCursor);
} else {
if(pCursor && !pCursor->source)
rfbMakeXCursorFromRichCursor(cl->screen,pCursor);
rect.encoding = Swap32IfLE(rfbEncodingXCursor);
}
/* If there is no cursor, send update with empty cursor data. */
if ( pCursor && pCursor->width == 1 &&
pCursor->height == 1 &&
pCursor->mask[0] == 0 ) {
pCursor = NULL;
}
if (pCursor == NULL) {
if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE ) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
rect.r.x = rect.r.y = 0;
rect.r.w = rect.r.h = 0;
memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
if (!rfbSendUpdateBuf(cl))
return FALSE;
return TRUE;
}
/* Calculate data sizes. */
bitmapRowBytes = (pCursor->width + 7) / 8;
maskBytes = bitmapRowBytes * pCursor->height;
dataBytes = (cl->useRichCursorEncoding) ?
(pCursor->width * pCursor->height *
(cl->format.bitsPerPixel / 8)) : maskBytes;
/* Send buffer contents if needed. */
if ( cl->ublen + sz_rfbFramebufferUpdateRectHeader +
sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
if ( cl->ublen + sz_rfbFramebufferUpdateRectHeader +
sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) {
return FALSE; /* FIXME. */
}
saved_ublen = cl->ublen;
/* Prepare rectangle header. */
rect.r.x = Swap16IfLE(pCursor->xhot);
rect.r.y = Swap16IfLE(pCursor->yhot);
rect.r.w = Swap16IfLE(pCursor->width);
rect.r.h = Swap16IfLE(pCursor->height);
memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,sz_rfbFramebufferUpdateRectHeader);
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
/* Prepare actual cursor data (depends on encoding used). */
if (!cl->useRichCursorEncoding) {
/* XCursor encoding. */
colors.foreRed = (char)(pCursor->foreRed >> 8);
colors.foreGreen = (char)(pCursor->foreGreen >> 8);
colors.foreBlue = (char)(pCursor->foreBlue >> 8);
colors.backRed = (char)(pCursor->backRed >> 8);
colors.backGreen = (char)(pCursor->backGreen >> 8);
colors.backBlue = (char)(pCursor->backBlue >> 8);
memcpy(&cl->updateBuf[cl->ublen], (char *)&colors, sz_rfbXCursorColors);
cl->ublen += sz_rfbXCursorColors;
bitmapData = (uint8_t *)pCursor->source;
for (i = 0; i < pCursor->height; i++) {
for (j = 0; j < bitmapRowBytes; j++) {
bitmapByte = bitmapData[i * bitmapRowBytes + j];
cl->updateBuf[cl->ublen++] = (char)bitmapByte;
}
}
} else {
/* RichCursor encoding. */
int bpp1=cl->screen->serverFormat.bitsPerPixel/8,
bpp2=cl->format.bitsPerPixel/8;
(*cl->translateFn)(cl->translateLookupTable,
&(cl->screen->serverFormat),
&cl->format, (char*)pCursor->richSource,
&cl->updateBuf[cl->ublen],
pCursor->width*bpp1, pCursor->width, pCursor->height);
cl->ublen += pCursor->width*bpp2*pCursor->height;
}
/* Prepare transparency mask. */
bitmapData = (uint8_t *)pCursor->mask;
for (i = 0; i < pCursor->height; i++) {
for (j = 0; j < bitmapRowBytes; j++) {
bitmapByte = bitmapData[i * bitmapRowBytes + j];
cl->updateBuf[cl->ublen++] = (char)bitmapByte;
}
}
/* Send everything we have prepared in the cl->updateBuf[]. */
rfbStatRecordEncodingSent(cl, (cl->useRichCursorEncoding ? rfbEncodingRichCursor : rfbEncodingXCursor),
sz_rfbFramebufferUpdateRectHeader + (cl->ublen - saved_ublen), sz_rfbFramebufferUpdateRectHeader + (cl->ublen - saved_ublen));
if (!rfbSendUpdateBuf(cl))
return FALSE;
return TRUE;
}
/*
* Send cursor position (PointerPos pseudo-encoding).
*/
rfbBool
rfbSendCursorPos(rfbClientPtr cl)
{
rfbFramebufferUpdateRectHeader rect;
if (cl->ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE) {
if (!rfbSendUpdateBuf(cl))
return FALSE;
}
rect.encoding = Swap32IfLE(rfbEncodingPointerPos);
rect.r.x = Swap16IfLE(cl->screen->cursorX);
rect.r.y = Swap16IfLE(cl->screen->cursorY);
rect.r.w = 0;
rect.r.h = 0;
memcpy(&cl->updateBuf[cl->ublen], (char *)&rect,
sz_rfbFramebufferUpdateRectHeader);
cl->ublen += sz_rfbFramebufferUpdateRectHeader;
rfbStatRecordEncodingSent(cl, rfbEncodingPointerPos, sz_rfbFramebufferUpdateRectHeader, sz_rfbFramebufferUpdateRectHeader);
if (!rfbSendUpdateBuf(cl))
return FALSE;
return TRUE;
}
/* conversion routine for predefined cursors in LSB order */
unsigned char rfbReverseByte[0x100] = {
/* copied from Xvnc/lib/font/util/utilbitmap.c */
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
void rfbConvertLSBCursorBitmapOrMask(int width,int height,unsigned char* bitmap)
{
int i,t=(width+7)/8*height;
for(i=0;i<t;i++)
bitmap[i]=rfbReverseByte[(int)bitmap[i]];
}
/* Cursor creation. You "paint" a cursor and let these routines do the work */
rfbCursorPtr rfbMakeXCursor(int width,int height,char* cursorString,char* maskString)
{
int i,j,w=(width+7)/8;
rfbCursorPtr cursor = (rfbCursorPtr)calloc(1,sizeof(rfbCursor));
char* cp;
unsigned char bit;
cursor->cleanup=TRUE;
cursor->width=width;
cursor->height=height;
/*cursor->backRed=cursor->backGreen=cursor->backBlue=0xffff;*/
cursor->foreRed=cursor->foreGreen=cursor->foreBlue=0xffff;
cursor->source = (unsigned char*)calloc(w,height);
cursor->cleanupSource = TRUE;
for(j=0,cp=cursorString;j<height;j++)
for(i=0,bit=0x80;i<width;i++,bit=(bit&1)?0x80:bit>>1,cp++)
if(*cp!=' ') cursor->source[j*w+i/8]|=bit;
if(maskString) {
cursor->mask = (unsigned char*)calloc(w,height);
for(j=0,cp=maskString;j<height;j++)
for(i=0,bit=0x80;i<width;i++,bit=(bit&1)?0x80:bit>>1,cp++)
if(*cp!=' ') cursor->mask[j*w+i/8]|=bit;
} else
cursor->mask = (unsigned char*)rfbMakeMaskForXCursor(width,height,(char*)cursor->source);
cursor->cleanupMask = TRUE;
return(cursor);
}
char* rfbMakeMaskForXCursor(int width,int height,char* source)
{
int i,j,w=(width+7)/8;
char* mask=(char*)calloc(w,height);
unsigned char c;
for(j=0;j<height;j++)
for(i=w-1;i>=0;i--) {
c=source[j*w+i];
if(j>0) c|=source[(j-1)*w+i];
if(j<height-1) c|=source[(j+1)*w+i];
if(i>0 && (c&0x80))
mask[j*w+i-1]|=0x01;
if(i<w-1 && (c&0x01))
mask[j*w+i+1]|=0x80;
mask[j*w+i]|=(c<<1)|c|(c>>1);
}
return(mask);
}
/* this function dithers the alpha using Floyd-Steinberg */
char* rfbMakeMaskFromAlphaSource(int width,int height,unsigned char* alphaSource)
{
int* error=(int*)calloc(sizeof(int),width);
int i,j,currentError=0,maskStride=(width+7)/8;
unsigned char* result=(unsigned char*)calloc(maskStride,height);
for(j=0;j<height;j++)
for(i=0;i<width;i++) {
int right,middle,left;
currentError+=alphaSource[i+width*j]+error[i];
if(currentError<0x80) {
/* set to transparent */
/* alpha was treated as 0 */
} else {
/* set to solid */
result[i/8+j*maskStride]|=(0x100>>(i&7));
/* alpha was treated as 0xff */
currentError-=0xff;
}
/* propagate to next row */
right=currentError/16;
middle=currentError*5/16;
left=currentError*3/16;
currentError-=right+middle+left;
error[i]=right;
if(i>0) {
error[i-1]=middle;
if(i>1)
error[i-2]=left;
}
}
free(error);
return (char *) result;
}
void rfbFreeCursor(rfbCursorPtr cursor)
{
if(cursor) {
if(cursor->cleanupRichSource && cursor->richSource)
free(cursor->richSource);
if(cursor->cleanupRichSource && cursor->alphaSource)
free(cursor->alphaSource);
if(cursor->cleanupSource && cursor->source)
free(cursor->source);
if(cursor->cleanupMask && cursor->mask)
free(cursor->mask);
if(cursor->cleanup)
free(cursor);
else {
cursor->cleanup=cursor->cleanupSource=cursor->cleanupMask
=cursor->cleanupRichSource=FALSE;
cursor->source=cursor->mask=cursor->richSource=NULL;
cursor->alphaSource=NULL;
}
}
}
/* background and foregroud colour have to be set beforehand */
void rfbMakeXCursorFromRichCursor(rfbScreenInfoPtr rfbScreen,rfbCursorPtr cursor)
{
rfbPixelFormat* format=&rfbScreen->serverFormat;
int i,j,w=(cursor->width+7)/8,bpp=format->bitsPerPixel/8,
width=cursor->width*bpp;
uint32_t background;
char *back=(char*)&background;
unsigned char bit;
int interp = 0, db = 0;
if(cursor->source && cursor->cleanupSource)
free(cursor->source);
cursor->source=(unsigned char*)calloc(w,cursor->height);
cursor->cleanupSource=TRUE;
if(format->bigEndian) {
back+=4-bpp;
}
/* all zeros means we should interpolate to black+white ourselves */
if (!cursor->backRed && !cursor->backGreen && !cursor->backBlue &&
!cursor->foreRed && !cursor->foreGreen && !cursor->foreBlue) {
if (format->trueColour && (bpp == 1 || bpp == 2 || bpp == 4)) {
interp = 1;
cursor->foreRed = cursor->foreGreen = cursor->foreBlue = 0xffff;
}
}
background = ((format->redMax * cursor->backRed) / 0xffff) << format->redShift |
((format->greenMax * cursor->backGreen) / 0xffff) << format->greenShift |
((format->blueMax * cursor->backBlue) / 0xffff) << format->blueShift;
#define SETRGB(u) \
r = (255 * (((format->redMax << format->redShift) & (*u)) >> format->redShift)) / format->redMax; \
g = (255 * (((format->greenMax << format->greenShift) & (*u)) >> format->greenShift)) / format->greenMax; \
b = (255 * (((format->blueMax << format->blueShift) & (*u)) >> format->blueShift)) / format->blueMax;
if (db) fprintf(stderr, "interp: %d\n", interp);
for(j=0;j<cursor->height;j++) {
for(i=0,bit=0x80;i<cursor->width;i++,bit=(bit&1)?0x80:bit>>1) {
if (interp) {
int r = 0, g = 0, b = 0, grey;
char *p = cursor->richSource+j*width+i*bpp;
if (bpp == 1) {
unsigned char* uc = (unsigned char*) p;
SETRGB(uc);
} else if (bpp == 2) {
unsigned short* us = (unsigned short*) p;
SETRGB(us);
} else if (bpp == 4) {
unsigned int* ui = (unsigned int*) p;
SETRGB(ui);
}
grey = (r + g + b) / 3;
if (grey >= 128) {
cursor->source[j*w+i/8]|=bit;
if (db) fprintf(stderr, "1");
} else {
if (db) fprintf(stderr, "0");
}
} else if(memcmp(cursor->richSource+j*width+i*bpp, back, bpp)) {
cursor->source[j*w+i/8]|=bit;
}
}
if (db) fprintf(stderr, "\n");
}
}
void rfbMakeRichCursorFromXCursor(rfbScreenInfoPtr rfbScreen,rfbCursorPtr cursor)
{
rfbPixelFormat* format=&rfbScreen->serverFormat;
int i,j,w=(cursor->width+7)/8,bpp=format->bitsPerPixel/8;
uint32_t background,foreground;
char *back=(char*)&background,*fore=(char*)&foreground;
unsigned char *cp;
unsigned char bit;
if(cursor->richSource && cursor->cleanupRichSource)
free(cursor->richSource);
cp=cursor->richSource=(unsigned char*)calloc(cursor->width*bpp,cursor->height);
cursor->cleanupRichSource=TRUE;
if(format->bigEndian) {
back+=4-bpp;
fore+=4-bpp;
}
background=cursor->backRed<<format->redShift|
cursor->backGreen<<format->greenShift|cursor->backBlue<<format->blueShift;
foreground=cursor->foreRed<<format->redShift|
cursor->foreGreen<<format->greenShift|cursor->foreBlue<<format->blueShift;
for(j=0;j<cursor->height;j++)
for(i=0,bit=0x80;i<cursor->width;i++,bit=(bit&1)?0x80:bit>>1,cp+=bpp)
if(cursor->source[j*w+i/8]&bit) memcpy(cp,fore,bpp);
else memcpy(cp,back,bpp);
}
/* functions to draw/hide cursor directly in the frame buffer */
void rfbHideCursor(rfbClientPtr cl)
{
rfbScreenInfoPtr s=cl->screen;
rfbCursorPtr c=s->cursor;
int j,x1,x2,y1,y2,bpp=s->serverFormat.bitsPerPixel/8,
rowstride=s->paddedWidthInBytes;
LOCK(s->cursorMutex);
if(!c) {
UNLOCK(s->cursorMutex);
return;
}
/* restore what is under the cursor */
x1=cl->cursorX-c->xhot;
x2=x1+c->width;
if(x1<0) x1=0;
if(x2>=s->width) x2=s->width-1;
x2-=x1; if(x2<=0) {
UNLOCK(s->cursorMutex);
return;
}
y1=cl->cursorY-c->yhot;
y2=y1+c->height;
if(y1<0) y1=0;
if(y2>=s->height) y2=s->height-1;
y2-=y1; if(y2<=0) {
UNLOCK(s->cursorMutex);
return;
}
/* get saved data */
for(j=0;j<y2;j++)
memcpy(s->frameBuffer+(y1+j)*rowstride+x1*bpp,
s->underCursorBuffer+j*x2*bpp,
x2*bpp);
/* Copy to all scaled versions */
rfbScaledScreenUpdate(s, x1, y1, x1+x2, y1+y2);
UNLOCK(s->cursorMutex);
}
void rfbShowCursor(rfbClientPtr cl)
{
rfbScreenInfoPtr s=cl->screen;
rfbCursorPtr c=s->cursor;
int i,j,x1,x2,y1,y2,i1,j1,bpp=s->serverFormat.bitsPerPixel/8,
rowstride=s->paddedWidthInBytes,
bufSize,w;
rfbBool wasChanged=FALSE;
if(!c) return;
LOCK(s->cursorMutex);
bufSize=c->width*c->height*bpp;
w=(c->width+7)/8;
if(s->underCursorBufferLen<bufSize) {
if(s->underCursorBuffer!=NULL)
free(s->underCursorBuffer);
s->underCursorBuffer=malloc(bufSize);
s->underCursorBufferLen=bufSize;
}
/* save what is under the cursor */
i1=j1=0; /* offset in cursor */
x1=cl->cursorX-c->xhot;
x2=x1+c->width;
if(x1<0) { i1=-x1; x1=0; }
if(x2>=s->width) x2=s->width-1;
x2-=x1; if(x2<=0) {
UNLOCK(s->cursorMutex);
return; /* nothing to do */
}
y1=cl->cursorY-c->yhot;
y2=y1+c->height;
if(y1<0) { j1=-y1; y1=0; }
if(y2>=s->height) y2=s->height-1;
y2-=y1; if(y2<=0) {
UNLOCK(s->cursorMutex);
return; /* nothing to do */
}
/* save data */
for(j=0;j<y2;j++) {
char* dest=s->underCursorBuffer+j*x2*bpp;
const char* src=s->frameBuffer+(y1+j)*rowstride+x1*bpp;
unsigned int count=x2*bpp;
if(wasChanged || memcmp(dest,src,count)) {
wasChanged=TRUE;
memcpy(dest,src,count);
}
}
if(!c->richSource)
rfbMakeRichCursorFromXCursor(s,c);
if (c->alphaSource) {
int rmax, rshift;
int gmax, gshift;
int bmax, bshift;
int amax = 255; /* alphaSource is always 8bits of info per pixel */
unsigned int rmask, gmask, bmask;
rmax = s->serverFormat.redMax;
gmax = s->serverFormat.greenMax;
bmax = s->serverFormat.blueMax;
rshift = s->serverFormat.redShift;
gshift = s->serverFormat.greenShift;
bshift = s->serverFormat.blueShift;
rmask = (rmax << rshift);
gmask = (gmax << gshift);
bmask = (bmax << bshift);
for(j=0;j<y2;j++) {
for(i=0;i<x2;i++) {
/*
* we loop over the whole cursor ignoring c->mask[],
* using the extracted alpha value instead.
*/
char *dest;
unsigned char *src, *aptr;
unsigned int val, dval, sval;
int rdst, gdst, bdst; /* fb RGB */
int asrc, rsrc, gsrc, bsrc; /* rich source ARGB */
dest = s->frameBuffer + (j+y1)*rowstride + (i+x1)*bpp;
src = c->richSource + (j+j1)*c->width*bpp + (i+i1)*bpp;
aptr = c->alphaSource + (j+j1)*c->width + (i+i1);
asrc = *aptr;
if (!asrc) {
continue;
}
if (bpp == 1) {
dval = *((unsigned char*) dest);
sval = *((unsigned char*) src);
} else if (bpp == 2) {
dval = *((unsigned short*) dest);
sval = *((unsigned short*) src);
} else if (bpp == 3) {
unsigned char *dst = (unsigned char *) dest;
dval = 0;
dval |= ((*(dst+0)) << 0);
dval |= ((*(dst+1)) << 8);
dval |= ((*(dst+2)) << 16);
sval = 0;
sval |= ((*(src+0)) << 0);
sval |= ((*(src+1)) << 8);
sval |= ((*(src+2)) << 16);
} else if (bpp == 4) {
dval = *((unsigned int*) dest);
sval = *((unsigned int*) src);
} else {
continue;
}
/* extract dest and src RGB */
rdst = (dval & rmask) >> rshift; /* fb */
gdst = (dval & gmask) >> gshift;
bdst = (dval & bmask) >> bshift;
rsrc = (sval & rmask) >> rshift; /* richcursor */
gsrc = (sval & gmask) >> gshift;
bsrc = (sval & bmask) >> bshift;
/* blend in fb data. */
if (! c->alphaPreMultiplied) {
rsrc = (asrc * rsrc)/amax;
gsrc = (asrc * gsrc)/amax;
bsrc = (asrc * bsrc)/amax;
}
rdst = rsrc + ((amax - asrc) * rdst)/amax;
gdst = gsrc + ((amax - asrc) * gdst)/amax;
bdst = bsrc + ((amax - asrc) * bdst)/amax;
val = 0;
val |= (rdst << rshift);
val |= (gdst << gshift);
val |= (bdst << bshift);
/* insert the cooked pixel into the fb */
memcpy(dest, &val, bpp);
}
}
} else {
/* now the cursor has to be drawn */
for(j=0;j<y2;j++)
for(i=0;i<x2;i++)
if((c->mask[(j+j1)*w+(i+i1)/8]<<((i+i1)&7))&0x80)
memcpy(s->frameBuffer+(j+y1)*rowstride+(i+x1)*bpp,
c->richSource+(j+j1)*c->width*bpp+(i+i1)*bpp,bpp);
}
/* Copy to all scaled versions */
rfbScaledScreenUpdate(s, x1, y1, x1+x2, y1+y2);
UNLOCK(s->cursorMutex);
}
/*
* If enableCursorShapeUpdates is FALSE, and the cursor is hidden, make sure
* that if the frameBuffer was transmitted with a cursor drawn, then that
* region gets redrawn.
*/
void rfbRedrawAfterHideCursor(rfbClientPtr cl,sraRegionPtr updateRegion)
{
rfbScreenInfoPtr s = cl->screen;
rfbCursorPtr c = s->cursor;
if(c) {
int x,y,x2,y2;
x = cl->cursorX-c->xhot;
y = cl->cursorY-c->yhot;
x2 = x+c->width;
y2 = y+c->height;
if(sraClipRect2(&x,&y,&x2,&y2,0,0,s->width,s->height)) {
sraRegionPtr rect;
rect = sraRgnCreateRect(x,y,x2,y2);
if(updateRegion)
sraRgnOr(updateRegion,rect);
else
sraRgnOr(cl->modifiedRegion,rect);
sraRgnDestroy(rect);
}
}
}
#ifdef DEBUG
static void rfbPrintXCursor(rfbCursorPtr cursor)
{
int i,i1,j,w=(cursor->width+7)/8;
unsigned char bit;
for(j=0;j<cursor->height;j++) {
for(i=0,i1=0,bit=0x80;i1<cursor->width;i1++,i+=(bit&1)?1:0,bit=(bit&1)?0x80:bit>>1)
if(cursor->source[j*w+i]&bit) putchar('#'); else putchar(' ');
putchar(':');
for(i=0,i1=0,bit=0x80;i1<cursor->width;i1++,i+=(bit&1)?1:0,bit=(bit&1)?0x80:bit>>1)
if(cursor->mask[j*w+i]&bit) putchar('#'); else putchar(' ');
putchar('\n');
}
}
#endif
void rfbSetCursor(rfbScreenInfoPtr rfbScreen,rfbCursorPtr c)
{
rfbClientIteratorPtr iterator;
rfbClientPtr cl;
LOCK(rfbScreen->cursorMutex);
if(rfbScreen->cursor) {
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator)))
if(!cl->enableCursorShapeUpdates)
rfbRedrawAfterHideCursor(cl,NULL);
rfbReleaseClientIterator(iterator);
if(rfbScreen->cursor->cleanup)
rfbFreeCursor(rfbScreen->cursor);
}
rfbScreen->cursor = c;
iterator=rfbGetClientIterator(rfbScreen);
while((cl=rfbClientIteratorNext(iterator))) {
cl->cursorWasChanged = TRUE;
if(!cl->enableCursorShapeUpdates)
rfbRedrawAfterHideCursor(cl,NULL);
}
rfbReleaseClientIterator(iterator);
UNLOCK(rfbScreen->cursorMutex);
}
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