guacamole-spice-protocol/src/protocols/vnc/vnc_handlers.c

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/*
* Copyright (C) 2013 Glyptodon LLC
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*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
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*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
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*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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#include "config.h"
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#include "client.h"
#include "guac_iconv.h"
#include "guac_surface.h"
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#include <stdlib.h>
#include <syslog.h>
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#include <time.h>
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#include <cairo/cairo.h>
#include <rfb/rfbclient.h>
#include <guacamole/socket.h>
#include <guacamole/protocol.h>
#include <guacamole/client.h>
/* Define cairo_format_stride_for_width() if missing */
#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
#define cairo_format_stride_for_width(format, width) (width*4)
#endif
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void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
guac_socket* socket = gc->socket;
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vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
const guac_layer* cursor_layer = guac_client_data->cursor;
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/* Cairo image buffer */
int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, w);
unsigned char* buffer = malloc(h*stride);
unsigned char* buffer_row_current = buffer;
cairo_surface_t* surface;
/* VNC image buffer */
unsigned int fb_stride = bpp * w;
unsigned char* fb_row_current = client->rcSource;
unsigned char* fb_mask = client->rcMask;
int dx, dy;
/* Copy image data from VNC client to RGBA buffer */
for (dy = 0; dy<h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = 0; dx<w; dx++) {
unsigned char alpha, red, green, blue;
unsigned int v;
/* Read current pixel value */
switch (bpp) {
case 4:
v = *((unsigned int*) fb_current);
break;
case 2:
v = *((unsigned short*) fb_current);
break;
default:
v = *((unsigned char*) fb_current);
}
/* Translate mask to alpha */
if (*(fb_mask++)) alpha = 0xFF;
else alpha = 0x00;
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output ARGB */
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if (guac_client_data->swap_red_blue)
*(buffer_current++) = (alpha << 24) | (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (alpha << 24) | (red << 16) | (green << 8) | blue;
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/* Next VNC pixel */
fb_current += bpp;
}
}
/* Send cursor data*/
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surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_ARGB32, w, h, stride);
guac_protocol_send_png(socket,
GUAC_COMP_SRC, cursor_layer, 0, 0, surface);
/* Update cursor */
guac_protocol_send_cursor(socket, x, y, cursor_layer, 0, 0, w, h);
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/* Free surface */
cairo_surface_destroy(surface);
free(buffer);
/* libvncclient does not free rcMask as it does rcSource */
free(client->rcMask);
}
void guac_vnc_update(rfbClient* client, int x, int y, int w, int h) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
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vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
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int dx, dy;
/* Cairo image buffer */
int stride;
unsigned char* buffer;
unsigned char* buffer_row_current;
cairo_surface_t* surface;
/* VNC framebuffer */
unsigned int bpp;
unsigned int fb_stride;
unsigned char* fb_row_current;
/* Ignore extra update if already handled by copyrect */
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if (guac_client_data->copy_rect_used) {
guac_client_data->copy_rect_used = 0;
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return;
}
/* Init Cairo buffer */
stride = cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, w);
buffer = malloc(h*stride);
buffer_row_current = buffer;
bpp = client->format.bitsPerPixel/8;
fb_stride = bpp * client->width;
fb_row_current = client->frameBuffer + (y * fb_stride) + (x * bpp);
/* Copy image data from VNC client to PNG */
for (dy = y; dy<y+h; dy++) {
unsigned int* buffer_current;
unsigned char* fb_current;
/* Get current buffer row, advance to next */
buffer_current = (unsigned int*) buffer_row_current;
buffer_row_current += stride;
/* Get current framebuffer row, advance to next */
fb_current = fb_row_current;
fb_row_current += fb_stride;
for (dx = x; dx<x+w; dx++) {
unsigned char red, green, blue;
unsigned int v;
switch (bpp) {
case 4:
v = *((unsigned int*) fb_current);
break;
case 2:
v = *((unsigned short*) fb_current);
break;
default:
v = *((unsigned char*) fb_current);
}
/* Translate value to RGB */
red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
/* Output RGB */
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if (guac_client_data->swap_red_blue)
*(buffer_current++) = (blue << 16) | (green << 8) | red;
else
*(buffer_current++) = (red << 16) | (green << 8) | blue;
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fb_current += bpp;
}
}
/* For now, only use default layer */
surface = cairo_image_surface_create_for_data(buffer, CAIRO_FORMAT_RGB24, w, h, stride);
guac_common_surface_draw(guac_client_data->default_surface, x, y, surface);
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/* Free surface */
cairo_surface_destroy(surface);
free(buffer);
}
void guac_vnc_copyrect(rfbClient* client, int src_x, int src_y, int w, int h, int dest_x, int dest_y) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
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/* For now, only use default layer */
guac_common_surface_copy(guac_client_data->default_surface, src_x, src_y, w, h,
guac_client_data->default_surface, dest_x, dest_y);
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((vnc_guac_client_data*) gc->data)->copy_rect_used = 1;
}
char* guac_vnc_get_password(rfbClient* client) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
return ((vnc_guac_client_data*) gc->data)->password;
}
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void guac_vnc_set_pixel_format(rfbClient* client, int color_depth) {
switch(color_depth) {
case 8:
client->format.depth = 8;
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client->format.bitsPerPixel = 8;
client->format.blueShift = 6;
client->format.redShift = 0;
client->format.greenShift = 3;
client->format.blueMax = 3;
client->format.redMax = 7;
client->format.greenMax = 7;
break;
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case 16:
client->format.depth = 16;
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client->format.bitsPerPixel = 16;
client->format.blueShift = 0;
client->format.redShift = 11;
client->format.greenShift = 5;
client->format.blueMax = 0x1f;
client->format.redMax = 0x1f;
client->format.greenMax = 0x3f;
break;
case 24:
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case 32:
default:
client->format.depth = 24;
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client->format.bitsPerPixel = 32;
client->format.blueShift = 0;
client->format.redShift = 16;
client->format.greenShift = 8;
client->format.blueMax = 0xff;
client->format.redMax = 0xff;
client->format.greenMax = 0xff;
}
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}
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rfbBool guac_vnc_malloc_framebuffer(rfbClient* rfb_client) {
guac_client* gc = rfbClientGetClientData(rfb_client, __GUAC_CLIENT);
vnc_guac_client_data* guac_client_data = (vnc_guac_client_data*) gc->data;
/* Resize surface */
if (guac_client_data->default_surface != NULL)
guac_common_surface_resize(guac_client_data->default_surface, rfb_client->width, rfb_client->height);
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/* Use original, wrapped proc */
return guac_client_data->rfb_MallocFrameBuffer(rfb_client);
}
void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen) {
guac_client* gc = rfbClientGetClientData(client, __GUAC_CLIENT);
vnc_guac_client_data* client_data = (vnc_guac_client_data*) gc->data;
char received_data[GUAC_VNC_CLIPBOARD_MAX_LENGTH];
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const char* input = text;
char* output = received_data;
/* Convert clipboard contents */
guac_iconv(GUAC_READ_ISO8859_1, &input, textlen,
GUAC_WRITE_UTF8, &output, sizeof(received_data));
/* Send converted data */
guac_common_clipboard_reset(client_data->clipboard, "text/plain");
guac_common_clipboard_append(client_data->clipboard, received_data, output - received_data);
guac_common_clipboard_send(client_data->clipboard, gc);
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}
void guac_vnc_client_log_info(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
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va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
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va_end(args);
/* Log to syslog */
syslog(LOG_INFO, "%s", message);
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}
void guac_vnc_client_log_error(const char* format, ...) {
char message[2048];
/* Copy log message into buffer */
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va_list args;
va_start(args, format);
vsnprintf(message, sizeof(message), format, args);
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va_end(args);
/* Log to syslog */
syslog(LOG_ERR, "%s", message);
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}