mirror of
https://github.com/AsahiLinux/u-boot
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b828ed7d79
For laying out text accurately it is necessary to know the width and height of the text. Add a measure() method to the console API, so this can be supported. Add an implementation for truetype and a base implementation for the normal console. Signed-off-by: Simon Glass <sjg@chromium.org>
459 lines
14 KiB
C
459 lines
14 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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*/
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#ifndef __video_console_h
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#define __video_console_h
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#include <video.h>
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struct video_priv;
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#define VID_FRAC_DIV 256
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#define VID_TO_PIXEL(x) ((x) / VID_FRAC_DIV)
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#define VID_TO_POS(x) ((x) * VID_FRAC_DIV)
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/**
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* struct vidconsole_priv - uclass-private data about a console device
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*
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* Drivers must set up @rows, @cols, @x_charsize, @y_charsize in their probe()
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* method. Drivers may set up @xstart_frac if desired.
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*
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* @sdev: stdio device, acting as an output sink
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* @xcur_frac: Current X position, in fractional units (VID_TO_POS(x))
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* @ycur: Current Y position in pixels (0=top)
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* @rows: Number of text rows
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* @cols: Number of text columns
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* @x_charsize: Character width in pixels
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* @y_charsize: Character height in pixels
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* @tab_width_frac: Tab width in fractional units
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* @xsize_frac: Width of the display in fractional units
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* @xstart_frac: Left margin for the text console in fractional units
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* @last_ch: Last character written to the text console on this line
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* @escape: TRUE if currently accumulating an ANSI escape sequence
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* @escape_len: Length of accumulated escape sequence so far
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* @col_saved: Saved X position, in fractional units (VID_TO_POS(x))
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* @row_saved: Saved Y position in pixels (0=top)
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* @escape_buf: Buffer to accumulate escape sequence
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*/
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struct vidconsole_priv {
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struct stdio_dev sdev;
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int xcur_frac;
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int ycur;
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int rows;
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int cols;
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int x_charsize;
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int y_charsize;
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int tab_width_frac;
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int xsize_frac;
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int xstart_frac;
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int last_ch;
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/*
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* ANSI escape sequences are accumulated character by character,
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* starting after the ESC char (0x1b) until the entire sequence
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* is consumed at which point it is acted upon.
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*/
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int escape;
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int escape_len;
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int row_saved;
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int col_saved;
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char escape_buf[32];
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};
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/**
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* struct vidfont_info - information about a font
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*
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* @name: Font name, e.g. nimbus_sans_l_regular
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*/
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struct vidfont_info {
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const char *name;
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};
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/**
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* struct vidconsole_colour - Holds colour information
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*
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* @colour_fg: Foreground colour (pixel value)
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* @colour_bg: Background colour (pixel value)
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*/
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struct vidconsole_colour {
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u32 colour_fg;
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u32 colour_bg;
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};
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/**
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* struct vidconsole_bbox - Bounding box of text
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*
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* This describes the bounding box of something, measured in pixels. The x0/y0
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* pair is inclusive; the x1/y2 pair is exclusive, meaning that it is one pixel
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* beyond the extent of the object
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*
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* @valid: Values are valid (bounding box is known)
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* @x0: left x position, in pixels from left side
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* @y0: top y position, in pixels from top
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* @x1: right x position + 1
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* @y1: botton y position + 1
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*/
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struct vidconsole_bbox {
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bool valid;
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int x0;
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int y0;
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int x1;
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int y1;
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};
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/**
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* struct vidconsole_ops - Video console operations
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*
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* These operations work on either an absolute console position (measured
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* in pixels) or a text row number (measured in rows, where each row consists
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* of an entire line of text - typically 16 pixels).
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*/
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struct vidconsole_ops {
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/**
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* putc_xy() - write a single character to a position
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*
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* @dev: Device to write to
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* @x_frac: Fractional pixel X position (0=left-most pixel) which
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* is the X position multipled by VID_FRAC_DIV.
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* @y: Pixel Y position (0=top-most pixel)
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* @ch: Character to write
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* @return number of fractional pixels that the cursor should move,
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* if all is OK, -EAGAIN if we ran out of space on this line, other -ve
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* on error
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*/
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int (*putc_xy)(struct udevice *dev, uint x_frac, uint y, char ch);
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/**
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* move_rows() - Move text rows from one place to another
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*
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* @dev: Device to adjust
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* @rowdst: Destination text row (0=top)
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* @rowsrc: Source start text row
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* @count: Number of text rows to move
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* @return 0 if OK, -ve on error
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*/
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int (*move_rows)(struct udevice *dev, uint rowdst, uint rowsrc,
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uint count);
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/**
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* set_row() - Set the colour of a text row
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*
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* Every pixel contained within the text row is adjusted
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*
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* @dev: Device to adjust
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* @row: Text row to adjust (0=top)
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* @clr: Raw colour (pixel value) to write to each pixel
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* @return 0 if OK, -ve on error
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*/
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int (*set_row)(struct udevice *dev, uint row, int clr);
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/**
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* entry_start() - Indicate that text entry is starting afresh
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*
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* @dev: Device to adjust
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* Returns: 0 on success, -ve on error
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*
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* Consoles which use proportional fonts need to track the position of
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* each character output so that backspace will return to the correct
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* place. This method signals to the console driver that a new entry
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* line is being start (e.g. the user pressed return to start a new
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* command). The driver can use this signal to empty its list of
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* positions.
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*/
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int (*entry_start)(struct udevice *dev);
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/**
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* backspace() - Handle erasing the last character
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*
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* @dev: Device to adjust
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* Returns: 0 on success, -ve on error
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*
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* With proportional fonts the vidconsole uclass cannot itself erase
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* the previous character. This optional method will be called when
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* a backspace is needed. The driver should erase the previous
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* character and update the cursor position (xcur_frac, ycur) to the
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* start of the previous character.
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*
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* If not implement, default behaviour will work for fixed-width
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* characters.
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*/
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int (*backspace)(struct udevice *dev);
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/**
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* get_font() - Obtain information about a font (optional)
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*
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* @dev: Device to check
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* @seq: Font number to query (0=first, 1=second, etc.)
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* @info: Returns font information on success
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* Returns: 0 on success, -ENOENT if no such font
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*/
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int (*get_font)(struct udevice *dev, int seq,
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struct vidfont_info *info);
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/**
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* get_font_size() - get the current font name and size
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*
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* @dev: vidconsole device
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* @sizep: Place to put the font size (nominal height in pixels)
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* Returns: Current font name
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*/
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const char *(*get_font_size)(struct udevice *dev, uint *sizep);
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/**
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* select_font() - Select a particular font by name / size
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*
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* @dev: Device to adjust
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* @name: Font name to use (NULL to use default)
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* @size: Font size to use (0 to use default)
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* Returns: 0 on success, -ENOENT if no such font
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*/
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int (*select_font)(struct udevice *dev, const char *name, uint size);
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/**
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* measure() - Measure the bounds of some text
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*
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* @dev: Device to adjust
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* @name: Font name to use (NULL to use default)
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* @size: Font size to use (0 to use default)
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* @text: Text to measure
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* @bbox: Returns bounding box of text, assuming it is positioned
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* at 0,0
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* Returns: 0 on success, -ENOENT if no such font
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*/
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int (*measure)(struct udevice *dev, const char *name, uint size,
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const char *text, struct vidconsole_bbox *bbox);
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};
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/* Get a pointer to the driver operations for a video console device */
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#define vidconsole_get_ops(dev) ((struct vidconsole_ops *)(dev)->driver->ops)
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/**
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* vidconsole_get_font() - Obtain information about a font
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*
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* @dev: Device to check
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* @seq: Font number to query (0=first, 1=second, etc.)
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* @info: Returns font information on success
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* Returns: 0 on success, -ENOENT if no such font, -ENOSYS if there is no such
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* method
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*/
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int vidconsole_get_font(struct udevice *dev, int seq,
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struct vidfont_info *info);
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/**
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* vidconsole_select_font() - Select a particular font by name / size
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*
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* @dev: Device to adjust
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* @name: Font name to use (NULL to use default)
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* @size: Font size to use (0 to use default)
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*/
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int vidconsole_select_font(struct udevice *dev, const char *name, uint size);
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/*
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* vidconsole_measure() - Measuring the bounding box of some text
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*
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* @dev: Console device to use
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* @name: Font name, NULL for default
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* @size: Font size, ignored if @name is NULL
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* @text: Text to measure
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* @bbox: Returns nounding box of text
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* Returns: 0 if OK, -ve on error
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*/
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int vidconsole_measure(struct udevice *dev, const char *name, uint size,
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const char *text, struct vidconsole_bbox *bbox);
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/**
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* vidconsole_push_colour() - Temporarily change the font colour
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*
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* @dev: Device to adjust
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* @fg: Foreground colour to select
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* @bg: Background colour to select
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* @old: Place to store the current colour, so it can be restored
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*/
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void vidconsole_push_colour(struct udevice *dev, enum colour_idx fg,
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enum colour_idx bg, struct vidconsole_colour *old);
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/**
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* vidconsole_pop_colour() - Restore the original colour
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*
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* @dev: Device to adjust
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* @old: Old colour to be restored
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*/
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void vidconsole_pop_colour(struct udevice *dev, struct vidconsole_colour *old);
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/**
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* vidconsole_putc_xy() - write a single character to a position
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*
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* @dev: Device to write to
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* @x_frac: Fractional pixel X position (0=left-most pixel) which
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* is the X position multipled by VID_FRAC_DIV.
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* @y: Pixel Y position (0=top-most pixel)
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* @ch: Character to write
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* Return: number of fractional pixels that the cursor should move,
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* if all is OK, -EAGAIN if we ran out of space on this line, other -ve
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* on error
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*/
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int vidconsole_putc_xy(struct udevice *dev, uint x, uint y, char ch);
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/**
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* vidconsole_move_rows() - Move text rows from one place to another
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*
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* @dev: Device to adjust
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* @rowdst: Destination text row (0=top)
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* @rowsrc: Source start text row
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* @count: Number of text rows to move
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* Return: 0 if OK, -ve on error
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*/
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int vidconsole_move_rows(struct udevice *dev, uint rowdst, uint rowsrc,
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uint count);
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/**
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* vidconsole_set_row() - Set the colour of a text row
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*
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* Every pixel contained within the text row is adjusted
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*
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* @dev: Device to adjust
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* @row: Text row to adjust (0=top)
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* @clr: Raw colour (pixel value) to write to each pixel
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* Return: 0 if OK, -ve on error
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*/
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int vidconsole_set_row(struct udevice *dev, uint row, int clr);
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/**
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* vidconsole_put_char() - Output a character to the current console position
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*
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* Outputs a character to the console and advances the cursor. This function
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* handles wrapping to new lines and scrolling the console. Special
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* characters are handled also: \n, \r, \b and \t.
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*
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* The device always starts with the cursor at position 0,0 (top left). It
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* can be adjusted manually using vidconsole_position_cursor().
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*
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* @dev: Device to adjust
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* @ch: Character to write
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* Return: 0 if OK, -ve on error
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*/
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int vidconsole_put_char(struct udevice *dev, char ch);
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/**
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* vidconsole_put_string() - Output a string to the current console position
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*
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* Outputs a string to the console and advances the cursor. This function
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* handles wrapping to new lines and scrolling the console. Special
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* characters are handled also: \n, \r, \b and \t.
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*
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* The device always starts with the cursor at position 0,0 (top left). It
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* can be adjusted manually using vidconsole_position_cursor().
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*
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* @dev: Device to adjust
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* @str: String to write
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* Return: 0 if OK, -ve on error
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*/
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int vidconsole_put_string(struct udevice *dev, const char *str);
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/**
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* vidconsole_position_cursor() - Move the text cursor
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*
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* @dev: Device to adjust
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* @col: New cursor text column
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* @row: New cursor text row
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* Return: 0 if OK, -ve on error
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*/
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void vidconsole_position_cursor(struct udevice *dev, unsigned col,
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unsigned row);
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/**
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* vidconsole_clear_and_reset() - Clear the console and reset the cursor
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*
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* The cursor is placed at the start of the console
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*
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* @dev: vidconsole device to adjust
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*/
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int vidconsole_clear_and_reset(struct udevice *dev);
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/**
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* vidconsole_set_cursor_pos() - set cursor position
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*
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* The cursor is set to the new position and the start-of-line information is
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* updated to the same position, so that a newline will return to @x
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*
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* @dev: video console device to update
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* @x: x position from left in pixels
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* @y: y position from top in pixels
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*/
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void vidconsole_set_cursor_pos(struct udevice *dev, int x, int y);
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/**
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* vidconsole_list_fonts() - List the available fonts
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*
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* @dev: vidconsole device to check
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*
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* This shows a list of fonts known by this vidconsole. The list is displayed on
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* the console (not necessarily @dev but probably)
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*/
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void vidconsole_list_fonts(struct udevice *dev);
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/**
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* vidconsole_get_font_size() - get the current font name and size
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*
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* @dev: vidconsole device
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* @sizep: Place to put the font size (nominal height in pixels)
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* @name: pointer to font name, a placeholder for result
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* Return: 0 if OK, -ENOSYS if not implemented in driver
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*/
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int vidconsole_get_font_size(struct udevice *dev, const char **name, uint *sizep);
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#ifdef CONFIG_VIDEO_COPY
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/**
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* vidconsole_sync_copy() - Sync back to the copy framebuffer
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*
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* This ensures that the copy framebuffer has the same data as the framebuffer
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* for a particular region. It should be called after the framebuffer is updated
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*
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* @from and @to can be in either order. The region between them is synced.
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*
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* @dev: Vidconsole device being updated
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* @from: Start/end address within the framebuffer (->fb)
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* @to: Other address within the frame buffer
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* Return: 0 if OK, -EFAULT if the start address is before the start of the
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* frame buffer start
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*/
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int vidconsole_sync_copy(struct udevice *dev, void *from, void *to);
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/**
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* vidconsole_memmove() - Perform a memmove() within the frame buffer
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*
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* This handles a memmove(), e.g. for scrolling. It also updates the copy
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* framebuffer.
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*
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* @dev: Vidconsole device being updated
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* @dst: Destination address within the framebuffer (->fb)
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* @src: Source address within the framebuffer (->fb)
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* @size: Number of bytes to transfer
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* Return: 0 if OK, -EFAULT if the start address is before the start of the
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* frame buffer start
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*/
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int vidconsole_memmove(struct udevice *dev, void *dst, const void *src,
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int size);
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#else
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#include <string.h>
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static inline int vidconsole_sync_copy(struct udevice *dev, void *from,
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void *to)
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{
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return 0;
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}
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static inline int vidconsole_memmove(struct udevice *dev, void *dst,
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const void *src, int size)
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{
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memmove(dst, src, size);
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return 0;
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}
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#endif
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#endif
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