display.c (6646B)
1/* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 20#include "config.h" 21 22#include "client.h" 23#include "common/iconv.h" 24#include "common/surface.h" 25#include "vnc.h" 26 27#include <cairo/cairo.h> 28#include <guacamole/client.h> 29#include <guacamole/layer.h> 30#include <guacamole/mem.h> 31#include <guacamole/protocol.h> 32#include <guacamole/socket.h> 33#include <rfb/rfbclient.h> 34#include <rfb/rfbproto.h> 35 36/* Define cairo_format_stride_for_width() if missing */ 37#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH 38#define cairo_format_stride_for_width(format, width) (width*4) 39#endif 40 41#include <stdarg.h> 42#include <stdio.h> 43#include <stdint.h> 44#include <stdlib.h> 45#include <syslog.h> 46 47void guac_vnc_update(rfbClient* client, int x, int y, int w, int h) { 48 49 guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY); 50 guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data; 51 52 int dx, dy; 53 54 /* Cairo image buffer */ 55 int stride; 56 unsigned char* buffer; 57 unsigned char* buffer_row_current; 58 cairo_surface_t* surface; 59 60 /* VNC framebuffer */ 61 unsigned int bpp; 62 unsigned int fb_stride; 63 unsigned char* fb_row_current; 64 65 /* Ignore extra update if already handled by copyrect */ 66 if (vnc_client->copy_rect_used) { 67 vnc_client->copy_rect_used = 0; 68 return; 69 } 70 71 /* Init Cairo buffer */ 72 stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, w); 73 buffer = guac_mem_alloc(h, stride); 74 buffer_row_current = buffer; 75 76 bpp = client->format.bitsPerPixel/8; 77 fb_stride = bpp * client->width; 78 fb_row_current = client->frameBuffer + (y * fb_stride) + (x * bpp); 79 80 /* Copy image data from VNC client to PNG */ 81 for (dy = y; dy<y+h; dy++) { 82 83 unsigned int* buffer_current; 84 unsigned char* fb_current; 85 86 /* Get current buffer row, advance to next */ 87 buffer_current = (unsigned int*) buffer_row_current; 88 buffer_row_current += stride; 89 90 /* Get current framebuffer row, advance to next */ 91 fb_current = fb_row_current; 92 fb_row_current += fb_stride; 93 94 for (dx = x; dx<x+w; dx++) { 95 96 unsigned char red, green, blue; 97 unsigned int v; 98 99 switch (bpp) { 100 case 4: 101 v = *((uint32_t*) fb_current); 102 break; 103 104 case 2: 105 v = *((uint16_t*) fb_current); 106 break; 107 108 default: 109 v = *((uint8_t*) fb_current); 110 } 111 112 /* Translate value to RGB */ 113 red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1); 114 green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1); 115 blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1); 116 117 /* Output RGB */ 118 if (vnc_client->settings->swap_red_blue) 119 *(buffer_current++) = (blue << 16) | (green << 8) | red; 120 else 121 *(buffer_current++) = (red << 16) | (green << 8) | blue; 122 123 fb_current += bpp; 124 125 } 126 } 127 128 /* Create surface from decoded buffer */ 129 surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24, 130 w, h, stride); 131 132 /* Draw directly to default layer */ 133 guac_common_surface_draw(vnc_client->display->default_surface, 134 x, y, surface); 135 136 /* Free surface */ 137 cairo_surface_destroy(surface); 138 guac_mem_free(buffer); 139 140} 141 142void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y) { 143 144 guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY); 145 guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data; 146 147 /* Copy specified rectangle within default layer */ 148 guac_common_surface_copy(vnc_client->display->default_surface, 149 src_x, src_y, w, h, 150 vnc_client->display->default_surface, dest_x, dest_y); 151 152 vnc_client->copy_rect_used = 1; 153 154} 155 156void guac_vnc_set_pixel_format(rfbClient* client, int color_depth) { 157 client->format.trueColour = 1; 158 switch(color_depth) { 159 case 8: 160 client->format.depth = 8; 161 client->format.bitsPerPixel = 8; 162 client->format.blueShift = 6; 163 client->format.redShift = 0; 164 client->format.greenShift = 3; 165 client->format.blueMax = 3; 166 client->format.redMax = 7; 167 client->format.greenMax = 7; 168 break; 169 170 case 16: 171 client->format.depth = 16; 172 client->format.bitsPerPixel = 16; 173 client->format.blueShift = 0; 174 client->format.redShift = 11; 175 client->format.greenShift = 5; 176 client->format.blueMax = 0x1f; 177 client->format.redMax = 0x1f; 178 client->format.greenMax = 0x3f; 179 break; 180 181 case 24: 182 case 32: 183 default: 184 client->format.depth = 24; 185 client->format.bitsPerPixel = 32; 186 client->format.blueShift = 0; 187 client->format.redShift = 16; 188 client->format.greenShift = 8; 189 client->format.blueMax = 0xff; 190 client->format.redMax = 0xff; 191 client->format.greenMax = 0xff; 192 } 193} 194 195rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client) { 196 197 guac_client* gc = rfbClientGetClientData(rfb_client, GUAC_VNC_CLIENT_KEY); 198 guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data; 199 200 /* Resize surface */ 201 if (vnc_client->display != NULL) 202 guac_common_surface_resize(vnc_client->display->default_surface, 203 rfb_client->width, rfb_client->height); 204 205 /* Use original, wrapped proc */ 206 return vnc_client->rfb_MallocFrameBuffer(rfb_client); 207} 208