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a254d11dda
u-boot-brain/drivers/video/console_rotate.c
Simon Glass a254d11dda video: Split out expression parts into variables 
The functions in this file do similar things but not always in the same
way. To make the code easier to read and compare, use a separate 'linenum'
variable in every function. This is then multiplied by the line length to
get the offset within the frame buffer to modify. Also use an 'x' variable
to hold the pixel position within that line. This is multipled by the
pixel size and added to the offset.

Also move the pbytes declaration up a little with the other long lines.

A side effect of splitting out these variables is that they are promoted
to int, i.e. a signed type, from the unsigned short used in the
vidconsole_priv struct. This would be necessary should any of the
variables go negative. At present this can actually happen in
console_putc_xy_2(), if the display width is not a multiple of the
character size (see next patch).

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
2020-07-09 12:33:24 +08:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2015 Google, Inc
* (C) Copyright 2015
* Bernecker & Rainer Industrieelektronik GmbH - http://www.br-automation.com
*/
#include <common.h>
#include <dm.h>
#include <video.h>
#include <video_console.h>
#include <video_font.h> /* Get font data, width and height */
static int console_set_row_1(struct udevice *dev, uint row, int clr)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
int pbytes = VNBYTES(vid_priv->bpix);
void *line;
int i, j;
line = vid_priv->fb + vid_priv->line_length -
(row + 1) * VIDEO_FONT_HEIGHT * pbytes;
for (j = 0; j < vid_priv->ysize; j++) {
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
default:
return -ENOSYS;
}
line += vid_priv->line_length;
}
return 0;
}
static int console_move_rows_1(struct udevice *dev, uint rowdst, uint rowsrc,
uint count)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
int pbytes = VNBYTES(vid_priv->bpix);
void *dst;
void *src;
int j;
dst = vid_priv->fb + vid_priv->line_length -
(rowdst + count) * VIDEO_FONT_HEIGHT * pbytes;
src = vid_priv->fb + vid_priv->line_length -
(rowsrc + count) * VIDEO_FONT_HEIGHT * pbytes;
for (j = 0; j < vid_priv->ysize; j++) {
memmove(dst, src, VIDEO_FONT_HEIGHT * pbytes * count);
src += vid_priv->line_length;
dst += vid_priv->line_length;
}
return 0;
}
static int console_putc_xy_1(struct udevice *dev, uint x_frac, uint y, char ch)
{
struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
struct udevice *vid = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid);
uchar *pfont = video_fontdata + (u8)ch * VIDEO_FONT_HEIGHT;
int pbytes = VNBYTES(vid_priv->bpix);
int i, col, x, linenum;
int mask = 0x80;
void *line;
linenum = VID_TO_PIXEL(x_frac) + 1;
x = y + 1;
line = vid_priv->fb + linenum * vid_priv->line_length - x * pbytes;
if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
return -EAGAIN;
for (col = 0; col < VIDEO_FONT_HEIGHT; col++) {
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst-- = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst-- = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst-- = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
default:
return -ENOSYS;
}
line += vid_priv->line_length;
mask >>= 1;
}
return VID_TO_POS(VIDEO_FONT_WIDTH);
}
static int console_set_row_2(struct udevice *dev, uint row, int clr)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
void *line;
int pixels = VIDEO_FONT_HEIGHT * vid_priv->xsize;
int i;
line = vid_priv->fb + vid_priv->ysize * vid_priv->line_length -
(row + 1) * VIDEO_FONT_HEIGHT * vid_priv->line_length;
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < pixels; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < pixels; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < pixels; i++)
*dst++ = clr;
break;
}
default:
return -ENOSYS;
}
return 0;
}
static int console_move_rows_2(struct udevice *dev, uint rowdst, uint rowsrc,
uint count)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
void *dst;
void *src;
void *end;
end = vid_priv->fb + vid_priv->ysize * vid_priv->line_length;
dst = end - (rowdst + count) * VIDEO_FONT_HEIGHT *
vid_priv->line_length;
src = end - (rowsrc + count) * VIDEO_FONT_HEIGHT *
vid_priv->line_length;
memmove(dst, src, VIDEO_FONT_HEIGHT * vid_priv->line_length * count);
return 0;
}
static int console_putc_xy_2(struct udevice *dev, uint x_frac, uint y, char ch)
{
struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
struct udevice *vid = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid);
int pbytes = VNBYTES(vid_priv->bpix);
int i, row, x, linenum;
void *line;
if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
return -EAGAIN;
linenum = vid_priv->ysize - y - 1;
x = vid_priv->xsize - VID_TO_PIXEL(x_frac) - VIDEO_FONT_WIDTH - 1;
line = vid_priv->fb + linenum * vid_priv->line_length + x * pbytes;
for (row = 0; row < VIDEO_FONT_HEIGHT; row++) {
unsigned int idx = (u8)ch * VIDEO_FONT_HEIGHT + row;
uchar bits = video_fontdata[idx];
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
*dst-- = (bits & 0x80) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
bits <<= 1;
}
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
*dst-- = (bits & 0x80) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
bits <<= 1;
}
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < VIDEO_FONT_WIDTH; i++) {
*dst-- = (bits & 0x80) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
bits <<= 1;
}
break;
}
default:
return -ENOSYS;
}
line -= vid_priv->line_length;
}
return VID_TO_POS(VIDEO_FONT_WIDTH);
}
static int console_set_row_3(struct udevice *dev, uint row, int clr)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
int pbytes = VNBYTES(vid_priv->bpix);
void *line;
int i, j;
line = vid_priv->fb + row * VIDEO_FONT_HEIGHT * pbytes;
for (j = 0; j < vid_priv->ysize; j++) {
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++)
*dst++ = clr;
break;
}
default:
return -ENOSYS;
}
line += vid_priv->line_length;
}
return 0;
}
static int console_move_rows_3(struct udevice *dev, uint rowdst, uint rowsrc,
uint count)
{
struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
int pbytes = VNBYTES(vid_priv->bpix);
void *dst;
void *src;
int j;
dst = vid_priv->fb + rowdst * VIDEO_FONT_HEIGHT * pbytes;
src = vid_priv->fb + rowsrc * VIDEO_FONT_HEIGHT * pbytes;
for (j = 0; j < vid_priv->ysize; j++) {
memmove(dst, src, VIDEO_FONT_HEIGHT * pbytes * count);
src += vid_priv->line_length;
dst += vid_priv->line_length;
}
return 0;
}
static int console_putc_xy_3(struct udevice *dev, uint x_frac, uint y, char ch)
{
struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
struct udevice *vid = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid);
uchar *pfont = video_fontdata + (u8)ch * VIDEO_FONT_HEIGHT;
int pbytes = VNBYTES(vid_priv->bpix);
int i, col, x;
int mask = 0x80;
void *line;
if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
return -EAGAIN;
x = vid_priv->ysize - VID_TO_PIXEL(x_frac) - 1;
line = vid_priv->fb + x * vid_priv->line_length + y * pbytes;
for (col = 0; col < VIDEO_FONT_HEIGHT; col++) {
switch (vid_priv->bpix) {
case VIDEO_BPP8:
if (IS_ENABLED(CONFIG_VIDEO_BPP8)) {
uint8_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst++ = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
case VIDEO_BPP16:
if (IS_ENABLED(CONFIG_VIDEO_BPP16)) {
uint16_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst++ = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
case VIDEO_BPP32:
if (IS_ENABLED(CONFIG_VIDEO_BPP32)) {
uint32_t *dst = line;
for (i = 0; i < VIDEO_FONT_HEIGHT; i++) {
*dst++ = (pfont[i] & mask) ?
vid_priv->colour_fg :
vid_priv->colour_bg;
}
break;
}
default:
return -ENOSYS;
}
line -= vid_priv->line_length;
mask >>= 1;
}
return VID_TO_POS(VIDEO_FONT_WIDTH);
}
static int console_probe_2(struct udevice *dev)
{
struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
struct udevice *vid_dev = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
vc_priv->x_charsize = VIDEO_FONT_WIDTH;
vc_priv->y_charsize = VIDEO_FONT_HEIGHT;
vc_priv->cols = vid_priv->xsize / VIDEO_FONT_WIDTH;
vc_priv->rows = vid_priv->ysize / VIDEO_FONT_HEIGHT;
return 0;
}
static int console_probe_1_3(struct udevice *dev)
{
struct vidconsole_priv *vc_priv = dev_get_uclass_priv(dev);
struct udevice *vid_dev = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
vc_priv->x_charsize = VIDEO_FONT_WIDTH;
vc_priv->y_charsize = VIDEO_FONT_HEIGHT;
vc_priv->cols = vid_priv->ysize / VIDEO_FONT_WIDTH;
vc_priv->rows = vid_priv->xsize / VIDEO_FONT_HEIGHT;
vc_priv->xsize_frac = VID_TO_POS(vid_priv->ysize);
return 0;
}
struct vidconsole_ops console_ops_1 = {
.putc_xy = console_putc_xy_1,
.move_rows = console_move_rows_1,
.set_row = console_set_row_1,
};
struct vidconsole_ops console_ops_2 = {
.putc_xy = console_putc_xy_2,
.move_rows = console_move_rows_2,
.set_row = console_set_row_2,
};
struct vidconsole_ops console_ops_3 = {
.putc_xy = console_putc_xy_3,
.move_rows = console_move_rows_3,
.set_row = console_set_row_3,
};
U_BOOT_DRIVER(vidconsole_1) = {
.name = "vidconsole1",
.id = UCLASS_VIDEO_CONSOLE,
.ops = &console_ops_1,
.probe = console_probe_1_3,
};
U_BOOT_DRIVER(vidconsole_2) = {
.name = "vidconsole2",
.id = UCLASS_VIDEO_CONSOLE,
.ops = &console_ops_2,
.probe = console_probe_2,
};
U_BOOT_DRIVER(vidconsole_3) = {
.name = "vidconsole3",
.id = UCLASS_VIDEO_CONSOLE,
.ops = &console_ops_3,
.probe = console_probe_1_3,
};
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