/* * 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 #include "rfb.h" #include "mipointer.h" #include "sprite.h" #include "cursorstr.h" #include "servermd.h" /* Copied from Xvnc/lib/font/util/utilbitmap.c */ static unsigned char _reverse_byte[0x100] = { 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 }; static int EncodeRichCursorData8 (char *buf, rfbPixelFormat *fmt, CursorPtr pCursor); static int EncodeRichCursorData16 (char *buf, rfbPixelFormat *fmt, CursorPtr pCursor); static int EncodeRichCursorData32 (char *buf, rfbPixelFormat *fmt, CursorPtr pCursor); /* * Send cursor shape either in X-style format or in client pixel format. */ Bool rfbSendCursorShape(cl, pScreen) rfbClientPtr cl; ScreenPtr pScreen; { CursorPtr pCursor; rfbFramebufferUpdateRectHeader rect; rfbXCursorColors colors; int saved_ublen; int bitmapRowBytes, paddedRowBytes, maskBytes, dataBytes; int i, j; CARD8 *bitmapData; CARD8 bitmapByte; if (cl->useRichCursorEncoding) { rect.encoding = Swap32IfLE(rfbEncodingRichCursor); } else { rect.encoding = Swap32IfLE(rfbEncodingXCursor); } pCursor = rfbSpriteGetCursorPtr(pScreen); /* If there is no cursor, send update with empty cursor data. */ if ( pCursor->bits->width == 1 && pCursor->bits->height == 1 && pCursor->bits->mask[0] == 0 ) { pCursor = NULL; } if (pCursor == NULL) { if (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(&updateBuf[ublen], (char *)&rect, sz_rfbFramebufferUpdateRectHeader); ublen += sz_rfbFramebufferUpdateRectHeader; cl->rfbCursorBytesSent += sz_rfbFramebufferUpdateRectHeader; cl->rfbCursorUpdatesSent++; if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } /* Calculate data sizes. */ bitmapRowBytes = (pCursor->bits->width + 7) / 8; paddedRowBytes = PixmapBytePad(pCursor->bits->width, 1); maskBytes = bitmapRowBytes * pCursor->bits->height; dataBytes = (cl->useRichCursorEncoding) ? (pCursor->bits->width * pCursor->bits->height * (cl->format.bitsPerPixel / 8)) : maskBytes; /* Send buffer contents if needed. */ if ( ublen + sz_rfbFramebufferUpdateRectHeader + sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) { if (!rfbSendUpdateBuf(cl)) return FALSE; } if ( ublen + sz_rfbFramebufferUpdateRectHeader + sz_rfbXCursorColors + maskBytes + dataBytes > UPDATE_BUF_SIZE ) { return FALSE; /* FIXME. */ } saved_ublen = ublen; /* Prepare rectangle header. */ rect.r.x = Swap16IfLE(pCursor->bits->xhot); rect.r.y = Swap16IfLE(pCursor->bits->yhot); rect.r.w = Swap16IfLE(pCursor->bits->width); rect.r.h = Swap16IfLE(pCursor->bits->height); memcpy(&updateBuf[ublen], (char *)&rect,sz_rfbFramebufferUpdateRectHeader); 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(&updateBuf[ublen], (char *)&colors, sz_rfbXCursorColors); ublen += sz_rfbXCursorColors; bitmapData = (CARD8 *)pCursor->bits->source; for (i = 0; i < pCursor->bits->height; i++) { for (j = 0; j < bitmapRowBytes; j++) { bitmapByte = bitmapData[i * paddedRowBytes + j]; if (screenInfo.bitmapBitOrder == LSBFirst) { bitmapByte = _reverse_byte[bitmapByte]; } updateBuf[ublen++] = (char)bitmapByte; } } } else { /* RichCursor encoding. */ switch (cl->format.bitsPerPixel) { case 8: ublen += EncodeRichCursorData8(&updateBuf[ublen], &cl->format, pCursor); break; case 16: ublen += EncodeRichCursorData16(&updateBuf[ublen], &cl->format, pCursor); break; case 32: ublen += EncodeRichCursorData32(&updateBuf[ublen], &cl->format, pCursor); break; default: return FALSE; } } /* Prepare transparency mask. */ bitmapData = (CARD8 *)pCursor->bits->mask; for (i = 0; i < pCursor->bits->height; i++) { for (j = 0; j < bitmapRowBytes; j++) { bitmapByte = bitmapData[i * paddedRowBytes + j]; if (screenInfo.bitmapBitOrder == LSBFirst) { bitmapByte = _reverse_byte[bitmapByte]; } updateBuf[ublen++] = (char)bitmapByte; } } /* Send everything we have prepared in the updateBuf[]. */ cl->rfbCursorBytesSent += (ublen - saved_ublen); cl->rfbCursorUpdatesSent++; if (!rfbSendUpdateBuf(cl)) return FALSE; return TRUE; } /* * Code to convert cursor source bitmap to the desired pixel format. */ #define RGB48_TO_PIXEL(fmt,r,g,b) \ (((CARD32)(r) * ((fmt)->redMax + 1) >> 16) << (fmt)->redShift | \ ((CARD32)(g) * ((fmt)->greenMax + 1) >> 16) << (fmt)->greenShift | \ ((CARD32)(b) * ((fmt)->blueMax + 1) >> 16) << (fmt)->blueShift) static int EncodeRichCursorData8(buf, fmt, pCursor) char *buf; rfbPixelFormat *fmt; CursorPtr pCursor; { int widthPixels, widthBytes; int x, y, b; CARD8 *src; char pix[2]; CARD8 bitmapByte; pix[0] = (char)RGB48_TO_PIXEL(fmt, pCursor->backRed, pCursor->backGreen, pCursor->backBlue); pix[1] = (char)RGB48_TO_PIXEL(fmt, pCursor->foreRed, pCursor->foreGreen, pCursor->foreBlue); src = (CARD8 *)pCursor->bits->source; widthPixels = pCursor->bits->width; widthBytes = PixmapBytePad(widthPixels, 1); for (y = 0; y < pCursor->bits->height; y++) { for (x = 0; x < widthPixels / 8; x++) { bitmapByte = src[y * widthBytes + x]; if (screenInfo.bitmapBitOrder == LSBFirst) { bitmapByte = _reverse_byte[bitmapByte]; } for (b = 7; b >= 0; b--) { *buf++ = pix[bitmapByte >> b & 1]; } } if (widthPixels % 8) { bitmapByte = src[y * widthBytes + x]; if (screenInfo.bitmapBitOrder == LSBFirst) { bitmapByte = _reverse_byte[bitmapByte]; } for (b = 7; b > 7 - widthPixels % 8; b--) { *buf++ = pix[bitmapByte >> b & 1]; } } } return (widthPixels * pCursor->bits->height); } #define DEFINE_RICH_ENCODE(bpp) \ \ static int \ EncodeRichCursorData##bpp(buf, fmt, pCursor) \ char *buf; \ rfbPixelFormat *fmt; \ CursorPtr pCursor; \ { \ int widthPixels, widthBytes; \ int x, y, b; \ CARD8 *src; \ CARD##bpp pix[2]; \ CARD8 bitmapByte; \ \ pix[0] = (CARD##bpp)RGB48_TO_PIXEL(fmt, pCursor->backRed, \ pCursor->backGreen, \ pCursor->backBlue); \ pix[1] = (CARD##bpp)RGB48_TO_PIXEL(fmt, pCursor->foreRed, \ pCursor->foreGreen, \ pCursor->foreBlue); \ if (!rfbServerFormat.bigEndian != !fmt->bigEndian) { \ pix[0] = Swap##bpp(pix[0]); \ pix[1] = Swap##bpp(pix[1]); \ } \ \ src = (CARD8 *)pCursor->bits->source; \ widthPixels = pCursor->bits->width; \ widthBytes = PixmapBytePad(widthPixels, 1); \ \ for (y = 0; y < pCursor->bits->height; y++) { \ for (x = 0; x < widthPixels / 8; x++) { \ bitmapByte = src[y * widthBytes + x]; \ if (screenInfo.bitmapBitOrder == LSBFirst) { \ bitmapByte = _reverse_byte[bitmapByte]; \ } \ for (b = 7; b >= 0; b--) { \ memcpy (buf, (char *)&pix[bitmapByte >> b & 1], \ sizeof(CARD##bpp)); \ buf += sizeof(CARD##bpp); \ } \ } \ if (widthPixels % 8) { \ bitmapByte = src[y * widthBytes + x]; \ if (screenInfo.bitmapBitOrder == LSBFirst) { \ bitmapByte = _reverse_byte[bitmapByte]; \ } \ for (b = 7; b > 7 - widthPixels % 8; b--) { \ memcpy (buf, (char *)&pix[bitmapByte >> b & 1], \ sizeof(CARD##bpp)); \ buf += sizeof(CARD##bpp); \ } \ } \ } \ \ return (widthPixels * pCursor->bits->height * (bpp / 8)); \ } DEFINE_RICH_ENCODE(16) DEFINE_RICH_ENCODE(32)