xrdp/libxrdp/xrdp_surface.c

/**
 * xrdp: A Remote Desktop Protocol server.
 *
 * Copyright (C) Jay Sorg 2012-2013
 * Copyright (C) Kevin Zhou 2012
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "libxrdp.h"
#include "freerdp/codec/rfx.h"

/*****************************************************************************/
struct xrdp_surface *APP_CC
xrdp_surface_create(struct xrdp_session *session, struct xrdp_fastpath *fastpath)
{
    struct xrdp_surface *self;

    self = (struct xrdp_surface *)g_malloc(sizeof(struct xrdp_surface), 1);
    self->session = session;
    self->fastpath = fastpath;
    self->rfx_context = rfx_context_new();
    self->s = stream_new(16384);
    return self;
}

/*****************************************************************************/
void APP_CC
xrdp_surface_delete(struct xrdp_surface *self)
{
    STREAM *s;
    RFX_CONTEXT *rfx_context;

    if (self == 0)
    {
        return;
    }

    s = (STREAM *)(self->s);
    rfx_context = (RFX_CONTEXT *)(self->rfx_context);
    free_stream(self->out_s);
    stream_free(s);
    rfx_context_free(rfx_context);
    g_free(self);
}

/*****************************************************************************/
/* returns error */
int APP_CC
xrdp_surface_reset(struct xrdp_surface *self)
{
    return 0;
}

/*****************************************************************************/
int APP_CC
xrdp_surface_init(struct xrdp_surface *self)
{
    int width;
    int height;
    RFX_CONTEXT *rfx_context;

    rfx_context = (RFX_CONTEXT *)(self->rfx_context);
    width = self->session->client_info->width;
    height = self->session->client_info->height;

    rfx_context->mode = self->session->client_info->rfx_entropy;
    rfx_context->width = width;
    rfx_context->height = height;

    make_stream(self->out_s);
    init_stream(self->out_s, 2 * 3 * width * height + 22);

    return 0;
}

/*****************************************************************************/
int APP_CC
xrdp_surface_send_surface_bits(struct xrdp_surface *self, int bpp, char *data,
                               int x, int y, int cx, int cy)
{
    RFX_RECT rect;
    char *buf;
    int Bpp;
    int i;
    int j;
    int codecId;
    uint32 bitmapDataLength;
    STREAM *s;
    RFX_CONTEXT *rfx_context;

    s = (STREAM *)(self->s);
    rfx_context = (RFX_CONTEXT *)(self->rfx_context);

    if ((bpp == 24) || (bpp == 32))
    {
    }
    else
    {
        g_writeln("bpp = %d is not supported\n", bpp);
        return 1;
    }

    Bpp = 4;

    rect.x = 0;
    rect.y = 0;
    rect.width  = cx;
    rect.height = cy;

    init_stream(self->out_s, 0);

    stream_set_pos(s, 0);
    rfx_compose_message(rfx_context, s, &rect, 1, data, cx, cy, Bpp * cx);

    codecId = self->session->client_info->rfx_codecId;
    /* surface_bits_command */
    out_uint16_le(self->out_s, CMDTYPE_STREAM_SURFACE_BITS); /* cmdType */
    out_uint16_le(self->out_s, x);                           /* destLeft */
    out_uint16_le(self->out_s, y);                           /* destTop */
    out_uint16_le(self->out_s, x + cx);                      /* destRight */
    out_uint16_le(self->out_s, y + cy);                      /* destBottom */
    out_uint8(self->out_s, 32);                              /* bpp */
    out_uint8(self->out_s, 0);                               /* reserved1 */
    out_uint8(self->out_s, 0);                               /* reserved2 */
    out_uint8(self->out_s, codecId);                         /* codecId */
    out_uint16_le(self->out_s, cx);                          /* width */
    out_uint16_le(self->out_s, cy);                          /* height */
    bitmapDataLength = stream_get_length(s);
    out_uint32_le(self->out_s, bitmapDataLength); /* bitmapDataLength */

    /* rfx bit stream */
    out_uint8p(self->out_s, s->data, bitmapDataLength);

    s_mark_end(self->out_s);
    return xrdp_fastpath_send_update_pdu(self->fastpath,
                                         FASTPATH_UPDATETYPE_SURFCMDS,
                                         self->out_s);
}

/*****************************************************************************/
int APP_CC
xrdp_surface_send_frame_marker(struct xrdp_surface *self,
                               uint16 frameAction, uint32 frameId)
{
    init_stream(self->out_s, 0);
    out_uint16_le(self->out_s, CMDTYPE_FRAME_MARKER);
    out_uint16_le(self->out_s, frameAction);
    out_uint32_le(self->out_s, frameId);
    s_mark_end(self->out_s);
    return xrdp_fastpath_send_update_pdu(self->fastpath,
                                         FASTPATH_UPDATETYPE_SURFCMDS,
                                         self->out_s);
}