304 lines
10 KiB
C
304 lines
10 KiB
C
/****************************************************************************
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* graphics/vnc/vnc_rre.c
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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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*
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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 copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include "vnc_server.h"
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct rre_encode8_s
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{
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struct rfb_rrehdr8_s hdr;
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struct rfb_rrerect8_s rect;
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};
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struct rre_encode16_s
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{
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struct rfb_rrehdr16_s hdr;
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struct rfb_rrerect16_s rect;
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};
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struct rre_encode32_s
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{
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struct rfb_rrehdr32_s hdr;
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struct rfb_rrerect32_s rect;
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: vnc_rreNN
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*
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* Description:
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* Encode a single RRE sub-rectangle, NN=bits-per-pixel
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*
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* Input Parameters:
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* session - An instance of the session structure.
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* dest - The locate to save the RRE encoded data
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* rect - Describes the rectangle in the local framebuffer.
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* bgcolor - The local color of the pixel data
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*
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* Returned Value:
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* The size of the framebuffer update message is returned..
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*
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****************************************************************************/
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ssize_t vnc_rre8(FAR struct vnc_session_s *session,
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FAR struct rre_encode8_s *dest,
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FAR struct nxgl_rect_s *rect,
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uint8_t bgcolor)
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{
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nxgl_coord_t width;
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nxgl_coord_t height;
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rfb_putbe32(dest->hdr.nsubrects, 1);
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dest->hdr.pixel = bgcolor;
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dest->rect.pixel = bgcolor;
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rfb_putbe16(dest->rect.xpos, rect->pt1.x);
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rfb_putbe16(dest->rect.ypos, rect->pt1.y);
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width = rect->pt2.x - rect->pt1.x + 1;
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height = rect->pt2.y - rect->pt1.y + 1;
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rfb_putbe16(dest->rect.width, width);
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rfb_putbe16(dest->rect.height, height);
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return sizeof(struct rre_encode8_s);
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}
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ssize_t vnc_rre16(FAR struct vnc_session_s *session,
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FAR struct rre_encode16_s *dest,
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FAR struct nxgl_rect_s *rect,
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uint16_t bgcolor)
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{
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nxgl_coord_t width;
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nxgl_coord_t height;
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rfb_putbe32(dest->hdr.nsubrects, 1);
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rfb_putbe16(dest->hdr.pixel, bgcolor);
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rfb_putbe16(dest->rect.pixel, bgcolor);
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rfb_putbe16(dest->rect.xpos, rect->pt1.x);
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rfb_putbe16(dest->rect.xpos, rect->pt1.x);
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rfb_putbe16(dest->rect.ypos, rect->pt1.y);
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width = rect->pt2.x - rect->pt1.x + 1;
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height = rect->pt2.y - rect->pt1.y + 1;
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rfb_putbe16(dest->rect.width, width);
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rfb_putbe16(dest->rect.height, height);
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return sizeof(struct rre_encode16_s);
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}
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ssize_t vnc_rre32(FAR struct vnc_session_s *session,
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FAR struct rre_encode32_s *dest,
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FAR struct nxgl_rect_s *rect,
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uint32_t bgcolor)
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{
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nxgl_coord_t width;
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nxgl_coord_t height;
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rfb_putbe32(dest->hdr.nsubrects, 1);
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rfb_putbe32(dest->hdr.pixel, bgcolor);
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rfb_putbe32(dest->rect.pixel, bgcolor);
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rfb_putbe16(dest->rect.xpos, rect->pt1.x);
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rfb_putbe16(dest->rect.xpos, rect->pt1.x);
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rfb_putbe16(dest->rect.ypos, rect->pt1.y);
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width = rect->pt2.x - rect->pt1.x + 1;
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height = rect->pt2.y - rect->pt1.y + 1;
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rfb_putbe16(dest->rect.width, width);
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rfb_putbe16(dest->rect.height, height);
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return sizeof(struct rre_encode32_s);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: vnc_rre
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*
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* Description:
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* This function does not really do RRE encoding. It just checks if the
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* update region is one color then uses the RRE encoding format to send
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* the constant color rectangle.
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*
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* Input Parameters:
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* session - An instance of the session structure.
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* rect - Describes the rectangle in the local framebuffer.
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*
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* Returned Value:
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* Zero is returned if RRE coding was not performed (but not error was)
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* encountered. Otherwise, the size of the framebuffer update message
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* is returned on success or a negated errno value is returned on failure
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* that indicates the the nature of the failure. A failure is only
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* returned in cases of a network failure and unexpected internal failures.
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*
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****************************************************************************/
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int vnc_rre(FAR struct vnc_session_s *session, FAR struct nxgl_rect_s *rect)
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{
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FAR struct rfb_framebufferupdate_s *rre;
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FAR struct rfb_rectangle_s *rrect;
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lfb_color_t bgcolor;
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nxgl_coord_t width;
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nxgl_coord_t height;
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size_t nbytes;
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ssize_t nsent;
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int ret;
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/* Check if the client supports the RRE encoding */
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if (session->rre)
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{
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/* Check if the update region contains only a single color */
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ret = vnc_colors(session, rect, 1, &bgcolor);
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if (ret == 1)
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{
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width = rect->pt2.x - rect->pt1.x + 1;
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height = rect->pt2.y - rect->pt1.y + 1;
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/* Format the FrameBuffer Update with a single RRE encoded
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* rectangle.
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*/
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rre = (FAR struct rfb_framebufferupdate_s *)session->outbuf;
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rre->msgtype = RFB_FBUPDATE_MSG;
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rre->padding = 0;
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rfb_putbe16(rre->nrect, 1);
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rrect = (FAR struct rfb_rectangle_s *)&rre->rect;
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rfb_putbe16(rrect->xpos, rect->pt1.x);
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rfb_putbe16(rrect->ypos, rect->pt1.y);
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rfb_putbe16(rrect->width, width);
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rfb_putbe16(rrect->height, height);
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rfb_putbe32(rrect->encoding, RFB_ENCODING_RRE);
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/* The sub-rectangle encoding depends of the remote pixel width */
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nbytes = SIZEOF_RFB_FRAMEBUFFERUPDATE_S(SIZEOF_RFB_RECTANGE_S(0));
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switch (session->colorfmt)
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{
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case FB_FMT_RGB8_222:
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nbytes += vnc_rre8(session,
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(FAR struct rre_encode8_s *)rrect->data,
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rect, vnc_convert_rgb8_222(bgcolor));
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break;
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case FB_FMT_RGB8_332:
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nbytes += vnc_rre8(session,
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(FAR struct rre_encode8_s *)rrect->data,
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rect, vnc_convert_rgb8_332(bgcolor));
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break;
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case FB_FMT_RGB16_555:
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nbytes += vnc_rre16(session,
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(FAR struct rre_encode16_s *)rrect->data,
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rect, vnc_convert_rgb16_555(bgcolor));
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break;
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case FB_FMT_RGB16_565:
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nbytes += vnc_rre16(session,
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(FAR struct rre_encode16_s *)rrect->data,
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rect, vnc_convert_rgb16_565(bgcolor));
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break;
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case FB_FMT_RGB32:
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nbytes += vnc_rre32(session,
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(FAR struct rre_encode32_s *)rrect->data,
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rect, vnc_convert_rgb32_888(bgcolor));
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break;
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default:
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gdbg("ERROR: Unrecognized color format: %d\n",
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session->colorfmt);
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return -EINVAL;
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}
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/* At the very last most, make certain that the supported encoding
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* has not changed asynchronously.
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*/
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if (session->rre)
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{
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/* Okay send until all of the bytes are out. This may
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* loop for the case where TCP write buffering is enabled
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* and there are a limited number of IOBs available.
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*/
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nsent = psock_send(&session->connect, rre, nbytes, 0);
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if (nsent < 0)
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{
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int errcode = get_errno();
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gdbg("ERROR: Send RRE FrameBufferUpdate failed: %d\n",
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errcode);
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DEBUGASSERT(errcode > 0);
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return -errcode;
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}
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DEBUGASSERT(nsent == nbytes);
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updvdbg("Sent {(%d, %d),(%d, %d)}\n",
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rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y);
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return nbytes;
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}
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return -EINVAL;
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}
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}
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return 0;
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} |