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https://github.com/ipxe/ipxe
synced 2025-12-29 11:03:15 +03:00
[fbcon] Add generic concept of a frame buffer console
Add support for a simple frame buffer console, using single buffering and a fixed-width bitmap font. Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
@@ -62,7 +62,7 @@ struct ansiesc_handler {
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};
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/** Maximum number of parameters within a single escape sequence */
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#define ANSIESC_MAX_PARAMS 4
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#define ANSIESC_MAX_PARAMS 5
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/**
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* ANSI escape sequence context
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@@ -65,6 +65,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
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#define ERRFILE_pending ( ERRFILE_CORE | 0x00190000 )
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#define ERRFILE_null_reboot ( ERRFILE_CORE | 0x001a0000 )
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#define ERRFILE_pinger ( ERRFILE_CORE | 0x001b0000 )
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#define ERRFILE_fbcon ( ERRFILE_CORE | 0x001c0000 )
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#define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 )
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#define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 )
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160
src/include/ipxe/fbcon.h
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160
src/include/ipxe/fbcon.h
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@@ -0,0 +1,160 @@
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#ifndef _IPXE_FBCON_H
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#define _IPXE_FBCON_H
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/** @file
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*
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* Frame buffer console
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <ipxe/ansiesc.h>
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#include <ipxe/uaccess.h>
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struct pixel_buffer;
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/** Character width, in pixels */
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#define FBCON_CHAR_WIDTH 9
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/** Character height, in pixels */
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#define FBCON_CHAR_HEIGHT 16
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/** Bold colour modifier (RGB value) */
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#define FBCON_BOLD 0x555555
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/** Transparent background magic colour (raw colour value) */
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#define FBCON_TRANSPARENT 0xffffffff
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/** A font glyph */
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struct fbcon_font_glyph {
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/** Row bitmask */
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uint8_t bitmask[FBCON_CHAR_HEIGHT];
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} __attribute__ (( packed ));
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/** A font definition */
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struct fbcon_font {
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/** Character glyphs */
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userptr_t start;
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} __attribute__ (( packed ));
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/** A frame buffer geometry
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*
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* The geometry is defined in terms of "entities" (which can be either
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* pixels or characters).
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*/
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struct fbcon_geometry {
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/** Width (number of entities per displayed row) */
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unsigned int width;
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/** Height (number of entities per displayed column) */
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unsigned int height;
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/** Length of a single entity */
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size_t len;
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/** Stride (offset between vertically adjacent entities) */
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size_t stride;
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};
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/** A frame buffer margin */
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struct fbcon_margin {
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/** Left margin */
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unsigned int left;
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/** Right margin */
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unsigned int right;
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/** Top margin */
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unsigned int top;
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/** Bottom margin */
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unsigned int bottom;
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};
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/** A frame buffer colour mapping */
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struct fbcon_colour_map {
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/** Red scale (right shift amount from 24-bit RGB) */
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uint8_t red_scale;
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/** Green scale (right shift amount from 24-bit RGB) */
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uint8_t green_scale;
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/** Blue scale (right shift amount from 24-bit RGB) */
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uint8_t blue_scale;
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/** Red LSB */
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uint8_t red_lsb;
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/** Green LSB */
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uint8_t green_lsb;
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/** Blue LSB */
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uint8_t blue_lsb;
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};
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/** A frame buffer text cell */
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struct fbcon_text_cell {
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/** Foreground colour */
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uint32_t foreground;
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/** Background colour */
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uint32_t background;
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/** Character */
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unsigned int character;
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};
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/** A frame buffer text array */
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struct fbcon_text {
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/** Stored text cells */
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userptr_t start;
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};
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/** A frame buffer background picture */
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struct fbcon_picture {
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/** Start address */
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userptr_t start;
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/** Pixel geometry */
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struct fbcon_geometry pixel;
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/** Character geometry */
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struct fbcon_geometry character;
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/** Margin */
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struct fbcon_margin margin;
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/** Indent to first character (in bytes) */
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size_t indent;
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};
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/** A frame buffer console */
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struct fbcon {
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/** Start address */
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userptr_t start;
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/** Length of one complete displayed screen */
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size_t len;
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/** Pixel geometry */
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struct fbcon_geometry *pixel;
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/** Character geometry */
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struct fbcon_geometry character;
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/** Margin */
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struct fbcon_margin margin;
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/** Indent to first character (in bytes) */
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size_t indent;
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/** Colour mapping */
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struct fbcon_colour_map *map;
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/** Font definition */
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struct fbcon_font *font;
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/** Text foreground raw colour */
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uint32_t foreground;
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/** Text background raw colour */
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uint32_t background;
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/** Bold colour modifier raw colour */
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uint32_t bold;
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/** Text cursor X position */
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unsigned int xpos;
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/** Text cursor Y position */
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unsigned int ypos;
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/** ANSI escape sequence context */
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struct ansiesc_context ctx;
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/** Text array */
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struct fbcon_text text;
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/** Background picture */
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struct fbcon_picture picture;
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};
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extern int fbcon_init ( struct fbcon *fbcon, userptr_t start,
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struct fbcon_geometry *pixel,
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struct fbcon_colour_map *map,
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struct fbcon_font *font,
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struct pixel_buffer *pixbuf );
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extern void fbcon_fini ( struct fbcon *fbcon );
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extern void fbcon_putchar ( struct fbcon *fbcon, int character );
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#endif /* _IPXE_FBCON_H */
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