/* * Copyright (C) 2001,2002 Constantin Kaplinsky. 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. */ /* * cursor.c - code to support cursor shape updates (XCursor and * RichCursor preudo-encodings). */ #include <rfb/rfbclient.h> #define OPER_SAVE 0 #define OPER_RESTORE 1 #define RGB24_TO_PIXEL(bpp,r,g,b) \ ((((uint##bpp##_t)(r) & 0xFF) * client->format.redMax + 127) / 255 \ << client->format.redShift | \ (((uint##bpp##_t)(g) & 0xFF) * client->format.greenMax + 127) / 255 \ << client->format.greenShift | \ (((uint##bpp##_t)(b) & 0xFF) * client->format.blueMax + 127) / 255 \ << client->format.blueShift) /********************************************************************* * HandleCursorShape(). Support for XCursor and RichCursor shape * updates. We emulate cursor operating on the frame buffer (that is * why we call it "software cursor"). ********************************************************************/ rfbBool HandleCursorShape(rfbClient* client,int xhot, int yhot, int width, int height, uint32_t enc) { int bytesPerPixel; size_t bytesPerRow, bytesMaskData; rfbXCursorColors rgb; uint32_t colors[2]; char *buf; uint8_t *ptr; int x, y, b; bytesPerPixel = client->format.bitsPerPixel / 8; bytesPerRow = (width + 7) / 8; bytesMaskData = bytesPerRow * height; if (width * height == 0) return TRUE; /* Allocate memory for pixel data and temporary mask data. */ if(client->rcSource) free(client->rcSource); client->rcSource = malloc(width * height * bytesPerPixel); if (client->rcSource == NULL) return FALSE; buf = malloc(bytesMaskData); if (buf == NULL) { free(client->rcSource); client->rcSource = NULL; return FALSE; } /* Read and decode cursor pixel data, depending on the encoding type. */ if (enc == rfbEncodingXCursor) { /* Read and convert background and foreground colors. */ if (!ReadFromRFBServer(client, (char *)&rgb, sz_rfbXCursorColors)) { free(client->rcSource); client->rcSource = NULL; free(buf); return FALSE; } colors[0] = RGB24_TO_PIXEL(32, rgb.backRed, rgb.backGreen, rgb.backBlue); colors[1] = RGB24_TO_PIXEL(32, rgb.foreRed, rgb.foreGreen, rgb.foreBlue); /* Read 1bpp pixel data into a temporary buffer. */ if (!ReadFromRFBServer(client, buf, bytesMaskData)) { free(client->rcSource); client->rcSource = NULL; free(buf); return FALSE; } /* Convert 1bpp data to byte-wide color indices. */ ptr = client->rcSource; for (y = 0; y < height; y++) { for (x = 0; x < width / 8; x++) { for (b = 7; b >= 0; b--) { *ptr = buf[y * bytesPerRow + x] >> b & 1; ptr += bytesPerPixel; } } for (b = 7; b > 7 - width % 8; b--) { *ptr = buf[y * bytesPerRow + x] >> b & 1; ptr += bytesPerPixel; } } /* Convert indices into the actual pixel values. */ switch (bytesPerPixel) { case 1: for (x = 0; x < width * height; x++) client->rcSource[x] = (uint8_t)colors[client->rcSource[x]]; break; case 2: for (x = 0; x < width * height; x++) ((uint16_t *)client->rcSource)[x] = (uint16_t)colors[client->rcSource[x * 2]]; break; case 4: for (x = 0; x < width * height; x++) ((uint32_t *)client->rcSource)[x] = colors[client->rcSource[x * 4]]; break; } } else { /* enc == rfbEncodingRichCursor */ if (!ReadFromRFBServer(client, (char *)client->rcSource, width * height * bytesPerPixel)) { free(client->rcSource); client->rcSource = NULL; free(buf); return FALSE; } } /* Read and decode mask data. */ if (!ReadFromRFBServer(client, buf, bytesMaskData)) { free(client->rcSource); client->rcSource = NULL; free(buf); return FALSE; } client->rcMask = malloc(width * height); if (client->rcMask == NULL) { free(client->rcSource); client->rcSource = NULL; free(buf); return FALSE; } ptr = client->rcMask; for (y = 0; y < height; y++) { for (x = 0; x < width / 8; x++) { for (b = 7; b >= 0; b--) { *ptr++ = buf[y * bytesPerRow + x] >> b & 1; } } for (b = 7; b > 7 - width % 8; b--) { *ptr++ = buf[y * bytesPerRow + x] >> b & 1; } } free(buf); return TRUE; }