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351 lines
11 KiB
351 lines
11 KiB
/*
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* cursor.c - support for cursor shape updates.
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*/
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/*
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* Copyright (C) 2000, 2001 Const Kaplinsky. All Rights Reserved.
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* Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
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*
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* This is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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* USA.
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*/
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#include <stdio.h>
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#include "rfb.h"
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#include "mipointer.h"
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#include "sprite.h"
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#include "cursorstr.h"
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#include "servermd.h"
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/* Copied from Xvnc/lib/font/util/utilbitmap.c */
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static unsigned char _reverse_byte[0x100] = {
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0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
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0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
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0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
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0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
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0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
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0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
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0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
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0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
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0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
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0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
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0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
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0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
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0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
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0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
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0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
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0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
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0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
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0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
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0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
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0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
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0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
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0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
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0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
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0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
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0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
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0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
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0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
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0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
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0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
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0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
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0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
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0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
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};
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static int EncodeRichCursorData8 (char *buf, rfbPixelFormat *fmt,
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CursorPtr pCursor);
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static int EncodeRichCursorData16 (char *buf, rfbPixelFormat *fmt,
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CursorPtr pCursor);
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static int EncodeRichCursorData32 (char *buf, rfbPixelFormat *fmt,
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CursorPtr pCursor);
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/*
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* Send cursor shape either in X-style format or in client pixel format.
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*/
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Bool
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rfbSendCursorShape(cl, pScreen)
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rfbClientPtr cl;
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ScreenPtr pScreen;
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{
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CursorPtr pCursor;
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rfbFramebufferUpdateRectHeader rect;
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rfbXCursorColors colors;
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int saved_ublen;
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int bitmapRowBytes, paddedRowBytes, maskBytes, dataBytes;
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int i, j;
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CARD8 *bitmapData;
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CARD8 bitmapByte;
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if (cl->useRichCursorEncoding) {
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rect.encoding = Swap32IfLE(rfbEncodingRichCursor);
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} else {
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rect.encoding = Swap32IfLE(rfbEncodingXCursor);
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}
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pCursor = rfbSpriteGetCursorPtr(pScreen);
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/* If there is no cursor, send update with empty cursor data. */
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if ( pCursor->bits->width == 1 &&
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pCursor->bits->height == 1 &&
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pCursor->bits->mask[0] == 0 ) {
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pCursor = NULL;
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}
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if (pCursor == NULL) {
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if (ublen + sz_rfbFramebufferUpdateRectHeader > UPDATE_BUF_SIZE ) {
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if (!rfbSendUpdateBuf(cl))
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return FALSE;
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}
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rect.r.x = rect.r.y = 0;
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rect.r.w = rect.r.h = 0;
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memcpy(&updateBuf[ublen], (char *)&rect,
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sz_rfbFramebufferUpdateRectHeader);
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ublen += sz_rfbFramebufferUpdateRectHeader;
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cl->rfbCursorBytesSent += sz_rfbFramebufferUpdateRectHeader;
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cl->rfbCursorUpdatesSent++;
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if (!rfbSendUpdateBuf(cl))
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return FALSE;
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return TRUE;
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}
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/* Calculate data sizes. */
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bitmapRowBytes = (pCursor->bits->width + 7) / 8;
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paddedRowBytes = PixmapBytePad(pCursor->bits->width, 1);
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maskBytes = bitmapRowBytes * pCursor->bits->height;
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dataBytes = (cl->useRichCursorEncoding) ?
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(pCursor->bits->width * pCursor->bits->height *
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(cl->format.bitsPerPixel / 8)) : maskBytes;
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/* Send buffer contents if needed. */
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if ( ublen + sz_rfbFramebufferUpdateRectHeader +
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sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) {
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if (!rfbSendUpdateBuf(cl))
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return FALSE;
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}
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if ( ublen + sz_rfbFramebufferUpdateRectHeader +
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sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) {
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return FALSE; /* FIXME. */
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}
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saved_ublen = ublen;
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/* Prepare rectangle header. */
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rect.r.x = Swap16IfLE(pCursor->bits->xhot);
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rect.r.y = Swap16IfLE(pCursor->bits->yhot);
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rect.r.w = Swap16IfLE(pCursor->bits->width);
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rect.r.h = Swap16IfLE(pCursor->bits->height);
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memcpy(&updateBuf[ublen], (char *)&rect,sz_rfbFramebufferUpdateRectHeader);
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ublen += sz_rfbFramebufferUpdateRectHeader;
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/* Prepare actual cursor data (depends on encoding used). */
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if (!cl->useRichCursorEncoding) {
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/* XCursor encoding. */
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colors.foreRed = (char)(pCursor->foreRed >> 8);
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colors.foreGreen = (char)(pCursor->foreGreen >> 8);
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colors.foreBlue = (char)(pCursor->foreBlue >> 8);
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colors.backRed = (char)(pCursor->backRed >> 8);
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colors.backGreen = (char)(pCursor->backGreen >> 8);
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colors.backBlue = (char)(pCursor->backBlue >> 8);
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memcpy(&updateBuf[ublen], (char *)&colors, sz_rfbXCursorColors);
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ublen += sz_rfbXCursorColors;
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bitmapData = (CARD8 *)pCursor->bits->source;
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for (i = 0; i < pCursor->bits->height; i++) {
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for (j = 0; j < bitmapRowBytes; j++) {
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bitmapByte = bitmapData[i * paddedRowBytes + j];
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if (screenInfo.bitmapBitOrder == LSBFirst) {
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bitmapByte = _reverse_byte[bitmapByte];
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}
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updateBuf[ublen++] = (char)bitmapByte;
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}
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}
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} else {
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/* RichCursor encoding. */
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switch (cl->format.bitsPerPixel) {
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case 8:
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ublen += EncodeRichCursorData8(&updateBuf[ublen],
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&cl->format, pCursor);
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break;
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case 16:
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ublen += EncodeRichCursorData16(&updateBuf[ublen],
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&cl->format, pCursor);
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break;
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case 32:
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ublen += EncodeRichCursorData32(&updateBuf[ublen],
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&cl->format, pCursor);
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break;
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default:
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return FALSE;
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}
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}
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/* Prepare transparency mask. */
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bitmapData = (CARD8 *)pCursor->bits->mask;
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for (i = 0; i < pCursor->bits->height; i++) {
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for (j = 0; j < bitmapRowBytes; j++) {
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bitmapByte = bitmapData[i * paddedRowBytes + j];
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if (screenInfo.bitmapBitOrder == LSBFirst) {
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bitmapByte = _reverse_byte[bitmapByte];
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}
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updateBuf[ublen++] = (char)bitmapByte;
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}
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}
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/* Send everything we have prepared in the updateBuf[]. */
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cl->rfbCursorBytesSent += (ublen - saved_ublen);
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cl->rfbCursorUpdatesSent++;
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if (!rfbSendUpdateBuf(cl))
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return FALSE;
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return TRUE;
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}
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/*
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* Code to convert cursor source bitmap to the desired pixel format.
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*/
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#define RGB48_TO_PIXEL(fmt,r,g,b) \
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(((CARD32)(r) * ((fmt)->redMax + 1) >> 16) << (fmt)->redShift | \
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((CARD32)(g) * ((fmt)->greenMax + 1) >> 16) << (fmt)->greenShift | \
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((CARD32)(b) * ((fmt)->blueMax + 1) >> 16) << (fmt)->blueShift)
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static int
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EncodeRichCursorData8(buf, fmt, pCursor)
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char *buf;
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rfbPixelFormat *fmt;
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CursorPtr pCursor;
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{
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int widthPixels, widthBytes;
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int x, y, b;
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CARD8 *src;
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char pix[2];
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CARD8 bitmapByte;
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pix[0] = (char)RGB48_TO_PIXEL(fmt, pCursor->backRed, pCursor->backGreen,
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pCursor->backBlue);
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pix[1] = (char)RGB48_TO_PIXEL(fmt, pCursor->foreRed, pCursor->foreGreen,
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pCursor->foreBlue);
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src = (CARD8 *)pCursor->bits->source;
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widthPixels = pCursor->bits->width;
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widthBytes = PixmapBytePad(widthPixels, 1);
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for (y = 0; y < pCursor->bits->height; y++) {
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for (x = 0; x < widthPixels / 8; x++) {
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bitmapByte = src[y * widthBytes + x];
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if (screenInfo.bitmapBitOrder == LSBFirst) {
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bitmapByte = _reverse_byte[bitmapByte];
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}
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for (b = 7; b >= 0; b--) {
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*buf++ = pix[bitmapByte >> b & 1];
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}
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}
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if (widthPixels % 8) {
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bitmapByte = src[y * widthBytes + x];
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if (screenInfo.bitmapBitOrder == LSBFirst) {
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bitmapByte = _reverse_byte[bitmapByte];
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}
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for (b = 7; b > 7 - widthPixels % 8; b--) {
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*buf++ = pix[bitmapByte >> b & 1];
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}
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}
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}
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return (widthPixels * pCursor->bits->height);
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}
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#define DEFINE_RICH_ENCODE(bpp) \
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\
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static int \
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EncodeRichCursorData##bpp(buf, fmt, pCursor) \
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char *buf; \
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rfbPixelFormat *fmt; \
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CursorPtr pCursor; \
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{ \
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int widthPixels, widthBytes; \
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int x, y, b; \
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CARD8 *src; \
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CARD##bpp pix[2]; \
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CARD8 bitmapByte; \
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\
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pix[0] = (CARD##bpp)RGB48_TO_PIXEL(fmt, pCursor->backRed, \
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pCursor->backGreen, \
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pCursor->backBlue); \
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pix[1] = (CARD##bpp)RGB48_TO_PIXEL(fmt, pCursor->foreRed, \
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pCursor->foreGreen, \
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pCursor->foreBlue); \
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if (!rfbServerFormat.bigEndian != !fmt->bigEndian) { \
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pix[0] = Swap##bpp(pix[0]); \
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pix[1] = Swap##bpp(pix[1]); \
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} \
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\
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src = (CARD8 *)pCursor->bits->source; \
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widthPixels = pCursor->bits->width; \
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widthBytes = PixmapBytePad(widthPixels, 1); \
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\
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for (y = 0; y < pCursor->bits->height; y++) { \
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for (x = 0; x < widthPixels / 8; x++) { \
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bitmapByte = src[y * widthBytes + x]; \
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if (screenInfo.bitmapBitOrder == LSBFirst) { \
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bitmapByte = _reverse_byte[bitmapByte]; \
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} \
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for (b = 7; b >= 0; b--) { \
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memcpy (buf, (char *)&pix[bitmapByte >> b & 1], \
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sizeof(CARD##bpp)); \
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buf += sizeof(CARD##bpp); \
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} \
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} \
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if (widthPixels % 8) { \
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bitmapByte = src[y * widthBytes + x]; \
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if (screenInfo.bitmapBitOrder == LSBFirst) { \
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bitmapByte = _reverse_byte[bitmapByte]; \
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} \
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for (b = 7; b > 7 - widthPixels % 8; b--) { \
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memcpy (buf, (char *)&pix[bitmapByte >> b & 1], \
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sizeof(CARD##bpp)); \
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buf += sizeof(CARD##bpp); \
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} \
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} \
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} \
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\
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return (widthPixels * pCursor->bits->height * (bpp / 8)); \
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}
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DEFINE_RICH_ENCODE(16)
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DEFINE_RICH_ENCODE(32)
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