193 lines
6.8 KiB
C
193 lines
6.8 KiB
C
/****************************************************************************
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* include/nuttx/nx/nxcursor.h
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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 __INCLUDE_NUTTX_NX_NXCURSOR_H
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#define __INCLUDE_NUTTX_NX_NXCURSOR_H
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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 <stdbool.h>
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#include <nuttx/nx/nx.h>
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#include <nuttx/nx/nxtypes.h>
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#if defined(CONFIG_NX_SWCURSOR) || defined(CONFIG_NX_HWCURSOR)
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Functions Definitions
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****************************************************************************/
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/* The current software cursor implementation is only available under the
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* following conditions:
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*
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* 1. Using a framebuffer hardware interface. This is because the logic to
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* implement this feature on top of the LCD interface has not been
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* implemented.
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* 2. Pixel depth is greater then or equal to 8-bits (8-bpp, 16-bpp,
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* 24/32/-bpp). This is because the logic to handle pixels smaller than
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* 1-byte has not been implemented,
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* 3. For FLAT and PROTECTED builds only. In those builds, the cursor
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* image resides in the common application space and is assumed to pesist
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* as long as needed. But with the KERNEL build, the image will lie in
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* a process space and will not be generally available. In that case,
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* we could keep the image in a shared memory region or perhaps copy the
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* image into a kernel internal buffer. Neither of those are implemented.
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*/
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#if (defined(CONFIG_NX_SWCURSOR) && \
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(defined(CONFIG_NX_LCDDRIVER) || !defined(CONFIG_NX_DISABLE_1BPP) || \
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!defined(CONFIG_NX_DISABLE_2BPP) || !defined(CONFIG_NX_DISABLE_4BPP) || \
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defined(CONFIG_BUILD_KERNEL)))
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# undef CONFIG_NX_NOCURSOR
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# undef CONFIG_NX_SWCURSOR
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# define CONFIG_NX_NOCURSOR 1
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#endif
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/* For cursor controllers that support custem cursor images, this structure
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* is used to provide the cursor image.
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*
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* The image is provided a a 2-bits-per-pixel image. The two bit incoding
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* is as following:
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*
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* 00 - The transparent background
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* 01 - Color1: The main color of the cursor
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* 10 - Color2: The color of any border
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* 11 - Color3: A blend color for better imaging (fake anti-aliasing).
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*/
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struct nx_cursorimage_s
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{
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struct nxgl_size_s size; /* The size of the cursor image */
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nxgl_mxpixel_t color1[CONFIG_NX_NPLANES]; /* Color1 is main color of the cursor */
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nxgl_mxpixel_t color2[CONFIG_NX_NPLANES]; /* Color2 is color of any border */
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nxgl_mxpixel_t color3[CONFIG_NX_NPLANES]; /* Color3 is the blended color */
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FAR const uint8_t *image; /* Pointer to bitmap image data */
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};
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/****************************************************************************
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* Name: nxcursor_enable
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*
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* Description:
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* Enable/disable presentation of the cursor.
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*
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* Input Parameters:
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* hnd - The server handle returned by nx_connect()
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* enable - True: show the cursor, false: hide the cursor.
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nxcursor_enable(NXHANDLE hnd, bool enable);
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/****************************************************************************
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* Name: nxcursor_setimage
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*
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* Description:
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* Set the cursor image.
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*
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* The image is provided a a 2-bits-per-pixel image. The two bit encoding
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* is as follows:
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*
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* 00 - The transparent background.
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* 01 - Color1: The main color of the cursor.
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* 10 - Color2: The color of any border.
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* 11 - Color3: A blend color for better imaging (fake anti-aliasing).
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*
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* NOTE: The NX logic will reference the user image buffer repeatedly.
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* That image buffer must persist for as long as the NX server connection
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* persists.
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*
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* Input Parameters:
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* hnd - The server handle returned by nx_connect()
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* image - Describes the cursor image in the expected format.
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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#if defined(CONFIG_NX_HWCURSORIMAGE) || defined(CONFIG_NX_SWCURSOR)
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int nxcursor_setimage(NXHANDLE hnd,
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FAR const struct nx_cursorimage_s *image);
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#endif
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/****************************************************************************
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* Name: nxcursor_setposition
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*
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* Description:
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* Move the cursor to the specified position
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*
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* Input Parameters:
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* hnd - The server handle returned by nx_connect()
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* pos - The new cursor position
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately.
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*
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****************************************************************************/
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int nxcursor_setposition(NXHANDLE hnd, FAR const struct nxgl_point_s *pos);
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/****************************************************************************
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* Name: nxcursor_get_position
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*
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* Description:
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* Return the current cursor position.
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*
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* CAUTION: The current cursor position is not updated until the display
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* is actually changed. Due to asynchronies caused by queue, the new
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* current cursor position may not match the cursor position set until
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* the client and server are synchronized.
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*
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* Input Parameters:
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* hnd - The server handle returned by nx_connect()
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* pos - The location to return the cursor position
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nxcursor_get_position(NXHANDLE hnd, FAR struct nxgl_point_s *pos);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* CONFIG_NX_SWCURSOR || CONFIG_NX_HWCURSOR */
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#endif /* __INCLUDE_NUTTX_NX_NXCURSOR_H */
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