/* * 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 #define OPER_SAVE 0 #define OPER_RESTORE 1 #define RGB24_TO_PIXEL(bpp,r,g,b) \ ((((CARD##bpp)(r) & 0xFF) * myFormat.redMax + 127) / 255 \ << myFormat.redShift | \ (((CARD##bpp)(g) & 0xFF) * myFormat.greenMax + 127) / 255 \ << myFormat.greenShift | \ (((CARD##bpp)(b) & 0xFF) * myFormat.blueMax + 127) / 255 \ << myFormat.blueShift) static Bool prevSoftCursorSet = False; static Pixmap rcSavedArea; static CARD8 *rcSource, *rcMask; static int rcHotX, rcHotY, rcWidth, rcHeight; static int rcCursorX = 0, rcCursorY = 0; static int rcLockX, rcLockY, rcLockWidth, rcLockHeight; static Bool rcCursorHidden, rcLockSet; static Bool SoftCursorInLockedArea(void); static void SoftCursorCopyArea(int oper); static void SoftCursorDraw(void); static void FreeSoftCursor(void); static void FreeX11Cursor(); /* 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 }; /* Data kept for HandleXCursor() function. */ static Bool prevXCursorSet = False; static Cursor prevXCursor; Bool HandleXCursor(int xhot, int yhot, int width, int height) { rfbXCursorColors colors; size_t bytesPerRow, bytesData; char *buf = NULL; XColor bg, fg; Drawable dr; unsigned int wret = 0, hret = 0; Pixmap source, mask; Cursor cursor; int i; bytesPerRow = (width + 7) / 8; bytesData = bytesPerRow * height; dr = DefaultRootWindow(dpy); if (width * height) { if (!ReadFromRFBServer((char *)&colors, sz_rfbXCursorColors)) return False; buf = malloc(bytesData * 2); if (buf == NULL) return False; if (!ReadFromRFBServer(buf, bytesData * 2)) { free(buf); return False; } XQueryBestCursor(dpy, dr, width, height, &wret, &hret); } if (width * height == 0 || wret < width || hret < height) { /* Free resources */ if (buf != NULL) free(buf); FreeX11Cursor(); return True; } bg.red = (unsigned short)colors.backRed << 8 | colors.backRed; bg.green = (unsigned short)colors.backGreen << 8 | colors.backGreen; bg.blue = (unsigned short)colors.backBlue << 8 | colors.backBlue; fg.red = (unsigned short)colors.foreRed << 8 | colors.foreRed; fg.green = (unsigned short)colors.foreGreen << 8 | colors.foreGreen; fg.blue = (unsigned short)colors.foreBlue << 8 | colors.foreBlue; for (i = 0; i < bytesData * 2; i++) buf[i] = (char)_reverse_byte[(int)buf[i] & 0xFF]; source = XCreateBitmapFromData(dpy, dr, buf, width, height); mask = XCreateBitmapFromData(dpy, dr, &buf[bytesData], width, height); cursor = XCreatePixmapCursor(dpy, source, mask, &fg, &bg, xhot, yhot); XFreePixmap(dpy, source); XFreePixmap(dpy, mask); free(buf); XDefineCursor(dpy, desktopWin, cursor); FreeX11Cursor(); prevXCursor = cursor; prevXCursorSet = True; return True; } /********************************************************************* * HandleCursorShape(). Support for XCursor and RichCursor shape * updates. We emulate cursor operating on the frame buffer (that is * why we call it "software cursor"). ********************************************************************/ Bool HandleCursorShape(int xhot, int yhot, int width, int height, CARD32 enc) { int bytesPerPixel; size_t bytesPerRow, bytesMaskData; Drawable dr; rfbXCursorColors rgb; CARD32 colors[2]; char *buf; CARD8 *ptr; int x, y, b; bytesPerPixel = myFormat.bitsPerPixel / 8; bytesPerRow = (width + 7) / 8; bytesMaskData = bytesPerRow * height; dr = DefaultRootWindow(dpy); FreeSoftCursor(); if (width * height == 0) return True; /* Allocate memory for pixel data and temporary mask data. */ rcSource = malloc(width * height * bytesPerPixel); if (rcSource == NULL) return False; buf = malloc(bytesMaskData); if (buf == NULL) { free(rcSource); return False; } /* Read and decode cursor pixel data, depending on the encoding type. */ if (enc == rfbEncodingXCursor) { if (appData.useX11Cursor) { HandleXCursor(xhot, yhot, width, height); return True; } /* Read and convert background and foreground colors. */ if (!ReadFromRFBServer((char *)&rgb, sz_rfbXCursorColors)) { free(rcSource); 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(buf, bytesMaskData)) { free(rcSource); free(buf); return False; } /* Convert 1bpp data to byte-wide color indices. */ ptr = 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++) rcSource[x] = (CARD8)colors[rcSource[x]]; break; case 2: for (x = 0; x < width * height; x++) ((CARD16 *)rcSource)[x] = (CARD16)colors[rcSource[x * 2]]; break; case 4: for (x = 0; x < width * height; x++) ((CARD32 *)rcSource)[x] = colors[rcSource[x * 4]]; break; } } else { /* enc == rfbEncodingRichCursor */ if (!ReadFromRFBServer((char *)rcSource, width * height * bytesPerPixel)) { free(rcSource); free(buf); return False; } } /* Read and decode mask data. */ if (!ReadFromRFBServer(buf, bytesMaskData)) { free(rcSource); free(buf); return False; } rcMask = malloc(width * height); if (rcMask == NULL) { free(rcSource); free(buf); return False; } ptr = 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); /* Set remaining data associated with cursor. */ dr = DefaultRootWindow(dpy); rcSavedArea = XCreatePixmap(dpy, dr, width, height, visdepth); rcHotX = xhot; rcHotY = yhot; rcWidth = width; rcHeight = height; SoftCursorCopyArea(OPER_SAVE); SoftCursorDraw(); rcCursorHidden = False; rcLockSet = False; prevSoftCursorSet = True; return True; } /********************************************************************* * HandleCursorPos(). Support for the PointerPos pseudo-encoding used * to transmit changes in pointer position from server to clients. * PointerPos encoding is used together with cursor shape updates. ********************************************************************/ Bool HandleCursorPos(int x, int y) { if (appData.useX11Cursor) { if (appData.fullScreen) XWarpPointer(dpy, None, desktopWin, 0, 0, 0, 0, x, y); return True; } if (x >= si.framebufferWidth) x = si.framebufferWidth - 1; if (y >= si.framebufferHeight) y = si.framebufferHeight - 1; SoftCursorMove(x, y); return True; } /********************************************************************* * SoftCursorLockArea(). This function should be used to prevent * collisions between simultaneous framebuffer update operations and * cursor drawing operations caused by movements of pointing device. * The parameters denote a rectangle where mouse cursor should not be * drawn. Every next call to this function expands locked area so * previous locks remain active. ********************************************************************/ void SoftCursorLockArea(int x, int y, int w, int h) { int newX, newY; if (!prevSoftCursorSet) return; if (!rcLockSet) { rcLockX = x; rcLockY = y; rcLockWidth = w; rcLockHeight = h; rcLockSet = True; } else { newX = (x < rcLockX) ? x : rcLockX; newY = (y < rcLockY) ? y : rcLockY; rcLockWidth = (x + w > rcLockX + rcLockWidth) ? (x + w - newX) : (rcLockX + rcLockWidth - newX); rcLockHeight = (y + h > rcLockY + rcLockHeight) ? (y + h - newY) : (rcLockY + rcLockHeight - newY); rcLockX = newX; rcLockY = newY; } if (!rcCursorHidden && SoftCursorInLockedArea()) { SoftCursorCopyArea(OPER_RESTORE); rcCursorHidden = True; } } /********************************************************************* * SoftCursorUnlockScreen(). This function discards all locks * performed since previous SoftCursorUnlockScreen() call. ********************************************************************/ void SoftCursorUnlockScreen(void) { if (!prevSoftCursorSet) return; if (rcCursorHidden) { SoftCursorCopyArea(OPER_SAVE); SoftCursorDraw(); rcCursorHidden = False; } rcLockSet = False; } /********************************************************************* * SoftCursorMove(). Moves soft cursor into a particular location. * This function respects locking of screen areas so when the cursor * is moved into the locked area, it becomes invisible until * SoftCursorUnlock() functions is called. ********************************************************************/ void SoftCursorMove(int x, int y) { if (prevSoftCursorSet && !rcCursorHidden) { SoftCursorCopyArea(OPER_RESTORE); rcCursorHidden = True; } rcCursorX = x; rcCursorY = y; if (prevSoftCursorSet && !(rcLockSet && SoftCursorInLockedArea())) { SoftCursorCopyArea(OPER_SAVE); SoftCursorDraw(); rcCursorHidden = False; } } /********************************************************************* * Internal (static) low-level functions. ********************************************************************/ static Bool SoftCursorInLockedArea(void) { return (rcLockX < rcCursorX - rcHotX + rcWidth && rcLockY < rcCursorY - rcHotY + rcHeight && rcLockX + rcLockWidth > rcCursorX - rcHotX && rcLockY + rcLockHeight > rcCursorY - rcHotY); } static void SoftCursorCopyArea(int oper) { int x, y, w, h; x = rcCursorX - rcHotX; y = rcCursorY - rcHotY; if (x >= si.framebufferWidth || y >= si.framebufferHeight) return; w = rcWidth; h = rcHeight; if (x < 0) { w += x; x = 0; } else if (x + w > si.framebufferWidth) { w = si.framebufferWidth - x; } if (y < 0) { h += y; y = 0; } else if (y + h > si.framebufferHeight) { h = si.framebufferHeight - y; } if (oper == OPER_SAVE) { /* Save screen area in memory. */ #ifdef MITSHM if (appData.useShm) XSync(dpy, False); #endif XCopyArea(dpy, desktopWin, rcSavedArea, gc, x, y, w, h, 0, 0); } else { /* Restore screen area. */ XCopyArea(dpy, rcSavedArea, desktopWin, gc, 0, 0, w, h, x, y); } } static void SoftCursorDraw(void) { int x, y, x0, y0; int offset, bytesPerPixel; char *pos; bytesPerPixel = myFormat.bitsPerPixel / 8; /* FIXME: Speed optimization is possible. */ for (y = 0; y < rcHeight; y++) { y0 = rcCursorY - rcHotY + y; if (y0 >= 0 && y0 < si.framebufferHeight) { for (x = 0; x < rcWidth; x++) { x0 = rcCursorX - rcHotX + x; if (x0 >= 0 && x0 < si.framebufferWidth) { offset = y * rcWidth + x; if (rcMask[offset]) { pos = (char *)&rcSource[offset * bytesPerPixel]; CopyDataToScreen(pos, x0, y0, 1, 1); } } } } } } static void FreeSoftCursor(void) { if (prevSoftCursorSet) { SoftCursorCopyArea(OPER_RESTORE); XFreePixmap(dpy, rcSavedArea); free(rcSource); free(rcMask); prevSoftCursorSet = False; } } static void FreeX11Cursor() { if (prevXCursorSet) { XFreeCursor(dpy, prevXCursor); prevXCursorSet = False; } }