8962a5fbe2
Save the pixels overwritten by the cursor into the save area. Signed-off-by: Simon Glass <sjg@chromium.org>
225 lines
7.4 KiB
C
225 lines
7.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (c) 2015 Google, Inc
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* (C) Copyright 2015
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* Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
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* (C) Copyright 2023 Dzmitry Sankouski <dsankouski@gmail.com>
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*/
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#include <charset.h>
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#include <config.h>
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struct udevice;
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struct vidconsole_cursor;
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struct video_priv;
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#define FLIPPED_DIRECTION 1
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#define NORMAL_DIRECTION 0
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/**
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* struct console_simple_priv - Private data for this driver
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*
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* @video_fontdata font graphical representation data
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*/
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struct console_simple_priv {
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struct video_fontdata *fontdata;
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};
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/**
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* Checks if bits per pixel supported.
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*
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* @param bpix framebuffer bits per pixel.
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*
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* @returns 0, if supported, or else -ENOSYS.
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*/
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int check_bpix_support(int bpix);
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/**
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* Fill 1 pixel in framebuffer, and go to next one.
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*
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* @param dstp a pointer to pointer to framebuffer.
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* @param value value to write to framebuffer.
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* @param pbytes framebuffer bytes per pixel.
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* @param step framebuffer pointer increment. Usually is equal to pbytes,
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* and may be negative to control filling direction.
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*/
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void fill_pixel_and_goto_next(void **dstp, u32 value, int pbytes, int step);
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/**
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* swap_pixel_and_goto_next() - Swap 1 pixel in framebuffer, and go to next one
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*
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* @param dstp a pointer to pointer to framebuffer.
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* @param value value to write to framebuffer.
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* @param pbytes framebuffer bytes per pixel.
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* @param step framebuffer pointer increment. Usually is equal to pbytes,
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* and may be negative to control filling direction.
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* Return: old value of the pixel
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*/
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u32 swap_pixel_and_goto_next(void **dstp, u32 value, int pbytes, int step);
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/**
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* Fills 1 character in framebuffer vertically. Vertically means we're filling char font data rows
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* across the lines.
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*
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* @param pfont a pointer to character font data.
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* @param line a pointer to pointer to framebuffer. It's a point for upper left char corner
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* @param vid_priv driver private data.
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* @fontdata font graphical representation data
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* @param direction controls character orientation. Can be normal or flipped.
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* When normal: When flipped:
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*|-----------------------------------------------|
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*| line stepping | |
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*| | | stepping -> |
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*| * | | * * * |
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*| * * v | * |
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*| * | * |
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*| * | * * ^ |
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*| * * * | * | |
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*| | | |
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*| stepping -> | line stepping |
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*|---!!we're starting from upper left char corner|
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*|-----------------------------------------------|
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*
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* @returns 0, if success, or else error code.
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*/
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int fill_char_vertically(uchar *pfont, void **line, struct video_priv *vid_priv,
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struct video_fontdata *fontdata, bool direction);
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/**
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* Fills 1 character in framebuffer horizontally.
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* Horizontally means we're filling char font data columns across the lines.
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*
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* @param pfont a pointer to character font data.
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* @param line a pointer to pointer to framebuffer. It's a point for upper left char corner
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* @param vid_priv driver private data.
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* @fontdata font graphical representation data
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* @param direction controls character orientation. Can be normal or flipped.
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* When normal: When flipped:
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*|-----------------------------------------------|
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*| * | line stepping |
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*| ^ * * * * * | | |
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*| | * * | v * * |
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*| | | * * * * * |
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*| line stepping | * |
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*| | |
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*| stepping -> | <- stepping |
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*|---!!we're starting from upper left char corner|
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*|-----------------------------------------------|
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*
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* @returns 0, if success, or else error code.
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*/
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int fill_char_horizontally(uchar *pfont, void **line, struct video_priv *vid_priv,
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struct video_fontdata *fontdata, bool direction);
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/**
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* cursor_show() - Show cursor by saving and drawing pixels
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*
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* @curs: cursor information
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* @vid_priv: video-device info
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* @direction: controls cursor orientation (normal or flipped)
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*
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* When normal: When flipped:
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*|-----------------------------------------------|
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*| * | line stepping |
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*| ^ * * * * * | | |
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*| | * * | v * * |
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*| | | * * * * * |
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*| line stepping | * |
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*| | |
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*| stepping -> | <<- stepping |
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*|---!!we're starting from upper left char corner|
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*|-----------------------------------------------|
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*
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* Return: 0 on success, -EINVAL if cursor data already saved
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*/
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int cursor_show(struct vidconsole_cursor *curs, struct video_priv *vid_priv,
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bool direction);
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/**
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* cursor_hide() - Hide cursor by restoring saved pixels
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*
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* @curs: cursor information
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* @vid_priv: video-device info
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* @direction: controls cursor orientation (normal or flipped)
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* Return: 0 if success, -EINVAL if no cursor data was saved
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*/
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int cursor_hide(struct vidconsole_cursor *curs, struct video_priv *vid_priv,
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bool direction);
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/**
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* console_alloc_cursor() - Allocate cursor save buffer
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*
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* Allocates memory for saving pixels under the cursor
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*
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* @dev: vidconsole device
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* Return: 0 if success, -ENOMEM if allocation fails
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*/
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int console_alloc_cursor(struct udevice *dev);
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/**
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* console probe function.
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*
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* @param dev a pointer to device.
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*
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* @returns 0, if success, or else error code.
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*/
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int console_probe(struct udevice *dev);
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/**
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* Internal function to be used in as ops.
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* See details in video_console.h get_font_size function
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**/
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const char *console_simple_get_font_size(struct udevice *dev, uint *sizep);
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/**
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* Internal function to be used in as ops.
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* See details in video_console.h get_font function
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**/
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int console_simple_get_font(struct udevice *dev, int seq, struct vidfont_info *info);
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/**
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* Internal function to be used in as ops.
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* See details in video_console.h select_font function
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**/
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int console_simple_select_font(struct udevice *dev, const char *name, uint size);
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/**
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* Normal console putc_xy function that can be called by other console drivers
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*
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* @param dev console device
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* @param x_frac fractional X position
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* @param y Y position in pixels
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* @param cp Unicode code point
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* @returns width in fractional pixels, or -ve on error
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*/
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int console_normal_putc_xy(struct udevice *dev, uint x_frac, uint y, int cp);
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/**
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* Fixed font putc_xy function that can be called with explicit font data
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*
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* @param dev console device
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* @param x_frac fractional X position
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* @param y Y position in pixels
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* @param cp Unicode code point
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* @param fontdata font data to use for rendering
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* @returns width in fractional pixels, or -ve on error
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*/
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int console_fixed_putc_xy(struct udevice *dev, uint x_frac, uint y, int cp,
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struct video_fontdata *fontdata);
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/**
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* Internal function to convert Unicode code points to code page 437.
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* Used by video consoles using bitmap fonts.
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*
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* @param codepoint Unicode code point
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* @returns code page 437 character.
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*/
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static inline u8 console_utf_to_cp437(int codepoint)
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{
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if (CONFIG_IS_ENABLED(CHARSET)) {
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utf_to_cp(&codepoint, codepage_437);
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return codepoint;
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}
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return codepoint;
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}
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