Code for drawing the VNC screen, does not work
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adamdunkels
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627a8720b5
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9e9a00fe03
210
platform/gtk/vnc-draw.c
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210
platform/gtk/vnc-draw.c
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/*
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* Copyright (c) 2003, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki VNC client
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*
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* $Id: vnc-draw.c,v 1.1 2006/06/17 23:07:15 adamdunkels Exp $
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*
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*/
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#include "vnc-draw.h"
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#include "contiki-conf.h"
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#ifndef VNC_CONF_VIEWPORT_WIDTH
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#define VNC_CONF_VIEWPORT_WIDTH (32*8)
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#endif
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#ifndef VNC_CONF_VIEWPORT_HEIGHT
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#define VNC_CONF_VIEWPORT_HEIGHT (16*8)
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#endif
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#ifndef VNC_CONF_REFRESH_ROWS
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#define VNC_CONF_REFRESH_ROWS 8
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#endif
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static unsigned char conv[256];
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static unsigned char oratab[8] =
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{ 0x80, 0x40, 0x20, 0x10,
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0x08, 0x04, 0x02, 0x01 };
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static unsigned char andtab[8] =
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{ 0x7f, 0xbf, 0xdf, 0xef,
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0xf7, 0xfb, 0xfd, 0xfe };
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static u8_t *bitmapptrtab[VNC_CONF_VIEWPORT_HEIGHT];
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static unsigned short viewport_x,
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viewport_y, viewport_w, viewport_h;
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u8_t vnc_draw_bitmap[(VNC_CONF_VIEWPORT_WIDTH / 8) *
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VNC_CONF_VIEWPORT_HEIGHT];
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u16_t vnc_draw_x;
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u16_t vnc_draw_y;
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u8_t *vnc_draw_dataptr;
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u8_t *vnc_draw_bitmapptr;
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u16_t vnc_draw_datalen;
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_draw_pixel(u16_t x, u8_t y, u8_t c)
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{
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u8_t o, a;
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vnc_draw_bitmapptr = bitmapptrtab[y] + (x & 0x1f8);
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if(c) {
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o = oratab[x & 7];
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*vnc_draw_bitmapptr = *vnc_draw_bitmapptr | o;
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} else {
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a = andtab[x & 7];
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*vnc_draw_bitmapptr = *vnc_draw_bitmapptr & a;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_draw_pixelline(u16_t x, u16_t y, u8_t *data, u16_t datalen)
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{
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u8_t o, a;
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register u8_t *bitmapptr;
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vnc_draw_x = x - viewport_x;
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vnc_draw_y = y - viewport_y;
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/* if(vnc_draw_y & 1) {
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return;
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} else {
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vnc_draw_y /= 2;
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}*/
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if(vnc_draw_y >= VNC_CONF_VIEWPORT_HEIGHT ||
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vnc_draw_x >= VNC_CONF_VIEWPORT_WIDTH) {
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return;
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}
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vnc_draw_datalen = datalen;
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if(vnc_draw_datalen + vnc_draw_x >= VNC_CONF_VIEWPORT_WIDTH) {
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vnc_draw_datalen = VNC_CONF_VIEWPORT_WIDTH - vnc_draw_x;
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if(vnc_draw_datalen == 0) {
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return;
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}
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}
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vnc_draw_dataptr = data;
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/* vnc_draw_bitmapptr = bitmaptab[vnc_draw_y] +
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(vnc_draw_x & 0x1f8);*/
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for(; vnc_draw_datalen > 0; --vnc_draw_datalen) {
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/* vnc_draw_pixel(vnc_draw_x, vnc_draw_y,
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conv[*vnc_draw_dataptr]);*/
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bitmapptr = bitmapptrtab[vnc_draw_y] + (vnc_draw_x & 0x1f8);
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if(conv[*vnc_draw_dataptr]) {
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o = oratab[vnc_draw_x & 7];
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*bitmapptr = *bitmapptr | o;
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} else {
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a = andtab[vnc_draw_x & 7];
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*bitmapptr = *bitmapptr & a;
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}
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++vnc_draw_dataptr;
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++vnc_draw_x;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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void
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vnc_draw_init(void)
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{
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unsigned int tmp;
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unsigned int i;
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unsigned short ptr;
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/* Create color conversion table. */
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for(i = 0; i < 256; ++i) {
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if(((i & 0xc0) > 0xc0) ||
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((i & 0x38) > 0x18) ||
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((i & 0x07) > 0x03)) {
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conv[i] = 0;
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} else {
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conv[i] = 1;
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}
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}
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memset(vnc_draw_bitmap, 0, sizeof(vnc_draw_bitmap));
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for(i = 0; i < VNC_CONF_VIEWPORT_HEIGHT; ++i) {
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bitmapptrtab[i] = (u8_t *)((u8_t *)vnc_draw_bitmap +
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((i & 0xfff8)/8) * VNC_CONF_VIEWPORT_WIDTH +
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(i & 7));
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}
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viewport_x = 0;
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viewport_y = 0;
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viewport_w = VNC_CONF_VIEWPORT_WIDTH;
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viewport_h = VNC_CONF_VIEWPORT_HEIGHT;
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return;
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}
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/*-----------------------------------------------------------------------------------*/
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u16_t
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vnc_draw_viewport_x(void)
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{
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return viewport_x;
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}
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/*-----------------------------------------------------------------------------------*/
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u16_t
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vnc_draw_viewport_y(void)
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{
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return viewport_y;
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}
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/*-----------------------------------------------------------------------------------*/
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u16_t
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vnc_draw_viewport_w(void)
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{
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return viewport_w;
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}
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/*-----------------------------------------------------------------------------------*/
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u16_t
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vnc_draw_viewport_h(void)
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{
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return viewport_h;
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}
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/*-----------------------------------------------------------------------------------*/
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