129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "client.h"
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#include "common/cursor.h"
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#include "common/display.h"
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#include "common/surface.h"
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#include "vnc.h"
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#include <cairo/cairo.h>
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#include <guacamole/client.h>
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#include <guacamole/layer.h>
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#include <guacamole/protocol.h>
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#include <guacamole/socket.h>
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#include <rfb/rfbclient.h>
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#include <rfb/rfbproto.h>
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/* Define cairo_format_stride_for_width() if missing */
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#ifndef HAVE_CAIRO_FORMAT_STRIDE_FOR_WIDTH
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#define cairo_format_stride_for_width(format, width) (width*4)
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#endif
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <syslog.h>
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void guac_vnc_cursor(rfbClient* client, int x, int y, int w, int h, int bpp) {
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guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
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guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
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/* Cairo image buffer */
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int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, w);
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unsigned char* buffer = malloc(h*stride);
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unsigned char* buffer_row_current = buffer;
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/* VNC image buffer */
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unsigned int fb_stride = bpp * w;
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unsigned char* fb_row_current = client->rcSource;
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unsigned char* fb_mask = client->rcMask;
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int dx, dy;
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/* Copy image data from VNC client to RGBA buffer */
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for (dy = 0; dy<h; dy++) {
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unsigned int* buffer_current;
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unsigned char* fb_current;
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/* Get current buffer row, advance to next */
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buffer_current = (unsigned int*) buffer_row_current;
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buffer_row_current += stride;
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/* Get current framebuffer row, advance to next */
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fb_current = fb_row_current;
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fb_row_current += fb_stride;
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for (dx = 0; dx<w; dx++) {
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unsigned char alpha, red, green, blue;
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unsigned int v;
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/* Read current pixel value */
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switch (bpp) {
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case 4:
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v = *((uint32_t*) fb_current);
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break;
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case 2:
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v = *((uint16_t*) fb_current);
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break;
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default:
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v = *((uint8_t*) fb_current);
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}
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/* Translate mask to alpha */
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if (*(fb_mask++)) alpha = 0xFF;
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else alpha = 0x00;
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/* Translate value to RGB */
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red = (v >> client->format.redShift) * 0x100 / (client->format.redMax + 1);
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green = (v >> client->format.greenShift) * 0x100 / (client->format.greenMax+ 1);
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blue = (v >> client->format.blueShift) * 0x100 / (client->format.blueMax + 1);
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/* Output ARGB */
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if (vnc_client->settings->swap_red_blue)
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*(buffer_current++) = (alpha << 24) | (blue << 16) | (green << 8) | red;
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else
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*(buffer_current++) = (alpha << 24) | (red << 16) | (green << 8) | blue;
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/* Next VNC pixel */
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fb_current += bpp;
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}
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}
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/* Update stored cursor information */
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guac_common_cursor_set_argb(vnc_client->display->cursor, x, y,
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buffer, w, h, stride);
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/* Free surface */
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free(buffer);
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/* libvncclient does not free rcMask as it does rcSource */
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free(client->rcMask);
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}
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