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62f3d37041
Add a minimal VNC viewer application that connects to a VNC server and renders the remote desktop on a local LCD. Features: - RFB 3.8 protocol with VNC Authentication (DES, pure software) - Raw encoding with pixel format auto-detected from LCD driver - Row-by-row rendering via LCDDEVIO_PUTAREA (minimal RAM usage) - LCD resolution and format queried at runtime via LCDDEVIO_GETVIDEOINFO - Auto-reconnect on connection loss with 2-second retry Usage: vncviewer <host> [port] vncviewer -p <password> <host> [port] vncviewer -p <password> -d <lcd_devno> <host> [port] Assisted-by: GitHubCopilot:claude-4.6-opus Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
/****************************************************************************
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* apps/system/vncviewer/lcd_render.h
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __APPS_SYSTEM_VNCVIEWER_LCD_RENDER_H
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#define __APPS_SYSTEM_VNCVIEWER_LCD_RENDER_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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/****************************************************************************
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* Public Types
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****************************************************************************/
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struct lcd_ctx_s
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{
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int fd; /* File descriptor for /dev/lcdN */
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uint16_t xres; /* LCD horizontal resolution */
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uint16_t yres; /* LCD vertical resolution */
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uint8_t fmt; /* Pixel format (FB_FMT_*) */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: lcd_init
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*
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* Description:
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* Open and initialize the LCD device.
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*
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* Input Parameters:
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* ctx - LCD context to initialize
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* devno - LCD device number (0 for /dev/lcd0)
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*
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* Returned Value:
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* OK on success, negative errno on failure.
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*
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****************************************************************************/
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int lcd_init(struct lcd_ctx_s *ctx, int devno);
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/****************************************************************************
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* Name: lcd_put_row
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*
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* Description:
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* Write a single row of pixels to the LCD.
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*
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* Input Parameters:
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* ctx - LCD context
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* x - Starting X coordinate
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* y - Y coordinate (row)
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* w - Width in pixels
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* pixels - Pixel data matching LCD native format
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*
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* Returned Value:
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* OK on success, negative errno on failure.
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*
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****************************************************************************/
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int lcd_put_row(struct lcd_ctx_s *ctx, uint16_t x, uint16_t y,
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uint16_t w, const uint16_t *pixels);
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/****************************************************************************
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* Name: lcd_fill
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*
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* Description:
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* Fill the entire LCD with a solid color.
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*
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****************************************************************************/
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int lcd_fill(struct lcd_ctx_s *ctx, uint16_t color);
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/****************************************************************************
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* Name: lcd_uninit
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*
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* Description:
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* Close the LCD device.
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*
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****************************************************************************/
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void lcd_uninit(struct lcd_ctx_s *ctx);
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#endif /* __APPS_SYSTEM_VNCVIEWER_LCD_RENDER_H */
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