mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 00:18:51 +09:00
![Simon Glass](/assets/img/avatar_default.png)
With proportional fonts the vidconsole uclass cannot itself erase the previous character. Provide an optional method so that the driver can handle this operation. Signed-off-by: Simon Glass <sjg@chromium.org>
189 lines
5.8 KiB
C
189 lines
5.8 KiB
C
/*
|
|
* Copyright (c) 2015 Google, Inc
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __video_console_h
|
|
#define __video_console_h
|
|
|
|
#define VID_FRAC_DIV 256
|
|
|
|
#define VID_TO_PIXEL(x) ((x) / VID_FRAC_DIV)
|
|
#define VID_TO_POS(x) ((x) * VID_FRAC_DIV)
|
|
|
|
/**
|
|
* struct vidconsole_priv - uclass-private data about a console device
|
|
*
|
|
* Drivers must set up @rows, @cols, @x_charsize, @y_charsize in their probe()
|
|
* method. Drivers may set up @xstart_frac if desired.
|
|
*
|
|
* @sdev: stdio device, acting as an output sink
|
|
* @xcur_frac: Current X position, in fractional units (VID_TO_POS(x))
|
|
* @curr_row: Current Y position in pixels (0=top)
|
|
* @rows: Number of text rows
|
|
* @cols: Number of text columns
|
|
* @x_charsize: Character width in pixels
|
|
* @y_charsize: Character height in pixels
|
|
* @tab_width_frac: Tab width in fractional units
|
|
* @xsize_frac: Width of the display in fractional units
|
|
* @xstart_frac: Left margin for the text console in fractional units
|
|
* @last_ch: Last character written to the text console on this line
|
|
*/
|
|
struct vidconsole_priv {
|
|
struct stdio_dev sdev;
|
|
int xcur_frac;
|
|
int ycur;
|
|
int rows;
|
|
int cols;
|
|
int x_charsize;
|
|
int y_charsize;
|
|
int tab_width_frac;
|
|
int xsize_frac;
|
|
int xstart_frac;
|
|
int last_ch;
|
|
};
|
|
|
|
/**
|
|
* struct vidconsole_ops - Video console operations
|
|
*
|
|
* These operations work on either an absolute console position (measured
|
|
* in pixels) or a text row number (measured in rows, where each row consists
|
|
* of an entire line of text - typically 16 pixels).
|
|
*/
|
|
struct vidconsole_ops {
|
|
/**
|
|
* putc_xy() - write a single character to a position
|
|
*
|
|
* @dev: Device to write to
|
|
* @x_frac: Fractional pixel X position (0=left-most pixel) which
|
|
* is the X position multipled by VID_FRAC_DIV.
|
|
* @y: Pixel Y position (0=top-most pixel)
|
|
* @ch: Character to write
|
|
* @return number of fractional pixels that the cursor should move,
|
|
* if all is OK, -EAGAIN if we ran out of space on this line, other -ve
|
|
* on error
|
|
*/
|
|
int (*putc_xy)(struct udevice *dev, uint x_frac, uint y, char ch);
|
|
|
|
/**
|
|
* move_rows() - Move text rows from one place to another
|
|
*
|
|
* @dev: Device to adjust
|
|
* @rowdst: Destination text row (0=top)
|
|
* @rowsrc: Source start text row
|
|
* @count: Number of text rows to move
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*move_rows)(struct udevice *dev, uint rowdst, uint rowsrc,
|
|
uint count);
|
|
|
|
/**
|
|
* set_row() - Set the colour of a text row
|
|
*
|
|
* Every pixel contained within the text row is adjusted
|
|
*
|
|
* @dev: Device to adjust
|
|
* @row: Text row to adjust (0=top)
|
|
* @clr: Raw colour (pixel value) to write to each pixel
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*set_row)(struct udevice *dev, uint row, int clr);
|
|
|
|
/**
|
|
* entry_start() - Indicate that text entry is starting afresh
|
|
*
|
|
* Consoles which use proportional fonts need to track the position of
|
|
* each character output so that backspace will return to the correct
|
|
* place. This method signals to the console driver that a new entry
|
|
* line is being start (e.g. the user pressed return to start a new
|
|
* command). The driver can use this signal to empty its list of
|
|
* positions.
|
|
*/
|
|
int (*entry_start)(struct udevice *dev);
|
|
|
|
/**
|
|
* backspace() - Handle erasing the last character
|
|
*
|
|
* With proportional fonts the vidconsole uclass cannot itself erase
|
|
* the previous character. This optional method will be called when
|
|
* a backspace is needed. The driver should erase the previous
|
|
* character and update the cursor position (xcur_frac, ycur) to the
|
|
* start of the previous character.
|
|
*
|
|
* If not implement, default behaviour will work for fixed-width
|
|
* characters.
|
|
*/
|
|
int (*backspace)(struct udevice *dev);
|
|
};
|
|
|
|
/* Get a pointer to the driver operations for a video console device */
|
|
#define vidconsole_get_ops(dev) ((struct vidconsole_ops *)(dev)->driver->ops)
|
|
|
|
/**
|
|
* vidconsole_putc_xy() - write a single character to a position
|
|
*
|
|
* @dev: Device to write to
|
|
* @x_frac: Fractional pixel X position (0=left-most pixel) which
|
|
* is the X position multipled by VID_FRAC_DIV.
|
|
* @y: Pixel Y position (0=top-most pixel)
|
|
* @ch: Character to write
|
|
* @return number of fractional pixels that the cursor should move,
|
|
* if all is OK, -EAGAIN if we ran out of space on this line, other -ve
|
|
* on error
|
|
*/
|
|
int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch);
|
|
|
|
/**
|
|
* vidconsole_move_rows() - Move text rows from one place to another
|
|
*
|
|
* @dev: Device to adjust
|
|
* @rowdst: Destination text row (0=top)
|
|
* @rowsrc: Source start text row
|
|
* @count: Number of text rows to move
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
|
|
uint count);
|
|
|
|
/**
|
|
* vidconsole_set_row() - Set the colour of a text row
|
|
*
|
|
* Every pixel contained within the text row is adjusted
|
|
*
|
|
* @dev: Device to adjust
|
|
* @row: Text row to adjust (0=top)
|
|
* @clr: Raw colour (pixel value) to write to each pixel
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int vidconsole_set_row(struct udevice *dev, uint row, int clr);
|
|
|
|
/**
|
|
* vidconsole_put_char() - Output a character to the current console position
|
|
*
|
|
* Outputs a character to the console and advances the cursor. This function
|
|
* handles wrapping to new lines and scrolling the console. Special
|
|
* characters are handled also: \n, \r, \b and \t.
|
|
*
|
|
* The device always starts with the cursor at position 0,0 (top left). It
|
|
* can be adjusted manually using vidconsole_position_cursor().
|
|
*
|
|
* @dev: Device to adjust
|
|
* @ch: Character to write
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int vidconsole_put_char(struct udevice *dev, char ch);
|
|
|
|
/**
|
|
* vidconsole_position_cursor() - Move the text cursor
|
|
*
|
|
* @dev: Device to adjust
|
|
* @col: New cursor text column
|
|
* @row: New cursor text row
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
void vidconsole_position_cursor(struct udevice *dev, unsigned col,
|
|
unsigned row);
|
|
|
|
#endif
|