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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright 2017 Toomas Soome <tsoome@me.com>
*/
/*
* Generic font related data and functions shared by early boot console
* in dboot, kernel startup and full kernel.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/font.h>
#include <sys/sysmacros.h>
/*
* Fonts are statically linked with this module. At some point an
* RFE might be desireable to allow dynamic font loading. The
* original intention to facilitate dynamic fonts can be seen
* by examining the data structures and set_font(). As much of
* the original code is retained but modified to be suited for
* traversing a list of static fonts.
*/
/*
* Must be sorted by font size in descending order
*/
struct fontlist fonts[] = {
{ &font_data_12x22, NULL },
{ &font_data_8x16, NULL },
{ &font_data_7x14, NULL },
{ &font_data_6x10, NULL },
{ NULL, NULL }
};
void
set_font(struct font *f, short *rows, short *cols, short height, short width)
{
bitmap_data_t *font_selected = NULL;
struct fontlist *fl;
int i;
/*
* Find best font for these dimensions, or use default
*
* A 1 pixel border is the absolute minimum we could have
* as a border around the text window (BORDER_PIXELS = 2),
* however a slightly larger border not only looks better
* but for the fonts currently statically built into the
* emulator causes much better font selection for the
* normal range of screen resolutions.
*/
for (fl = fonts; fl->data; fl++) {
if ((((*rows * fl->data->height) + BORDER_PIXELS) <= height) &&
(((*cols * fl->data->width) + BORDER_PIXELS) <= width)) {
font_selected = fl->data;
break;
}
}
/*
* The minus 2 is to make sure we have at least a 1 pixel
* border around the entire screen.
*/
if (font_selected == NULL) {
if (((*rows * DEFAULT_FONT_DATA.height) > height) ||
((*cols * DEFAULT_FONT_DATA.width) > width)) {
*rows = (height - 2) / DEFAULT_FONT_DATA.height;
*cols = (width - 2) / DEFAULT_FONT_DATA.width;
}
font_selected = &DEFAULT_FONT_DATA;
}
f->width = font_selected->width;
f->height = font_selected->height;
for (i = 0; i < ENCODED_CHARS; i++)
f->char_ptr[i] = font_selected->encoding[i];
f->image_data = font_selected->image;
}
/*
* bit_to_pix4 is for 4-bit frame buffers. It will write one output byte
* for each 2 bits of input bitmap. It inverts the input bits before
* doing the output translation, for reverse video.
*
* Assuming foreground is 0001 and background is 0000...
* An input data byte of 0x53 will output the bit pattern
* 00000001 00000001 00000000 00010001.
*/
void
font_bit_to_pix4(
struct font *f,
uint8_t *dest,
uint8_t c,
uint8_t fg_color,
uint8_t bg_color)
{
int row;
int byte;
int i;
uint8_t *cp;
uint8_t data;
uint8_t nibblett;
int bytes_wide;
cp = f->char_ptr[c];
bytes_wide = (f->width + 7) / 8;
for (row = 0; row < f->height; row++) {
for (byte = 0; byte < bytes_wide; byte++) {
data = *cp++;
for (i = 0; i < 4; i++) {
nibblett = (data >> ((3-i) * 2)) & 0x3;
switch (nibblett) {
case 0x0:
*dest++ = bg_color << 4 | bg_color;
break;
case 0x1:
*dest++ = bg_color << 4 | fg_color;
break;
case 0x2:
*dest++ = fg_color << 4 | bg_color;
break;
case 0x3:
*dest++ = fg_color << 4 | fg_color;
break;
}
}
}
}
}
/*
* bit_to_pix8 is for 8-bit frame buffers. It will write one output byte
* for each bit of input bitmap. It inverts the input bits before
* doing the output translation, for reverse video.
*
* Assuming foreground is 00000001 and background is 00000000...
* An input data byte of 0x53 will output the bit pattern
* 0000000 000000001 00000000 00000001 00000000 00000000 00000001 00000001.
*/
void
font_bit_to_pix8(
struct font *f,
uint8_t *dest,
uint8_t c,
uint8_t fg_color,
uint8_t bg_color)
{
int row;
int byte;
int i;
uint8_t *cp;
uint8_t data;
int bytes_wide;
uint8_t mask;
int bitsleft, nbits;
cp = f->char_ptr[c];
bytes_wide = (f->width + 7) / 8;
for (row = 0; row < f->height; row++) {
bitsleft = f->width;
for (byte = 0; byte < bytes_wide; byte++) {
data = *cp++;
mask = 0x80;
nbits = MIN(8, bitsleft);
bitsleft -= nbits;
for (i = 0; i < nbits; i++) {
*dest++ = (data & mask ? fg_color: bg_color);
mask = mask >> 1;
}
}
}
}
/*
* bit_to_pix24 is for 24-bit frame buffers. It will write four output bytes
* for each bit of input bitmap. It inverts the input bits before
* doing the output translation, for reverse video. Note that each
* 24-bit RGB value is finally stored in a 32-bit unsigned int, with the
* high-order byte set to zero.
*
* Assuming foreground is 00000000 11111111 11111111 11111111
* and background is 00000000 00000000 00000000 00000000
* An input data byte of 0x53 will output the bit pattern
*
* 00000000 00000000 00000000 00000000
* 00000000 11111111 11111111 11111111
* 00000000 00000000 00000000 00000000
* 00000000 11111111 11111111 11111111
* 00000000 00000000 00000000 00000000
* 00000000 00000000 00000000 00000000
* 00000000 11111111 11111111 11111111
* 00000000 11111111 11111111 11111111
*
*/
void
font_bit_to_pix24(
struct font *f,
uint32_t *dest,
uint8_t c,
uint32_t fg_color32,
uint32_t bg_color32)
{
int row;
int byte;
int i;
uint8_t *cp;
uint32_t data;
int bytes_wide;
int bitsleft, nbits;
cp = f->char_ptr[c];
bytes_wide = (f->width + 7) / 8;
for (row = 0; row < f->height; row++) {
bitsleft = f->width;
for (byte = 0; byte < bytes_wide; byte++) {
data = *cp++;
nbits = MIN(8, bitsleft);
bitsleft -= nbits;
for (i = 0; i < nbits; i++) {
*dest++ = ((data << i) & 0x80 ?
fg_color32 : bg_color32);
}
}
}
}
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