1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 #include "SDL_config.h" 23 24 #ifndef SDL_fbelo_h 25 #define SDL_fbelo_h 26 27 #include "SDL_fbvideo.h" 28 29 /* ELO */ 30 #define ELO_PACKET_SIZE 10 31 #define ELO_START_BYTE 'U' 32 33 /* eloConvertXY 34 Convert the raw coordinates from the ELO controller 35 to a screen position. 36 */ 37 void eloConvertXY(_THIS, int *dx, int *dy); 38 39 /* eloInitController(int fd) 40 Initialize the ELO serial touchscreen controller 41 */ 42 int eloInitController(int fd); 43 44 /* eloParsePacket 45 extract position and button state from a packet 46 */ 47 int eloParsePacket(unsigned char* mousebuf, int* dx, int* dy, int* button_state); 48 49 /* eloReadPosition 50 read a packet and get the cursor position 51 */ 52 53 int eloReadPosition(_THIS, int fd, int* x, int* y, int* button_state, int* realx, int* realy); 54 55 #endif /* SDL_fbelo_h */ 56
