video: Use fractional units for X coordinates
With anti-aliased fonts we need a more fine-grained horizontal position
than a single pixel. Characters can be positioned to start part-way through
a pixel, with anti-aliasing (greyscale edges) taking care of the visual
effect.
To cope with this, use fractional units (1/256 pixel) for horizontal
positions in the text console.
Signed-off-by: Simon Glass <sjg@chromium.org>
[agust: rebased]
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/drivers/video/console_normal.c b/drivers/video/console_normal.c
index d1031c8..89a55dd 100644
--- a/drivers/video/console_normal.c
+++ b/drivers/video/console_normal.c
@@ -71,13 +71,18 @@
return 0;
}
-static int console_normal_putc_xy(struct udevice *dev, uint x, uint y, char ch)
+static int console_normal_putc_xy(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 i, row;
void *line = vid_priv->fb + y * vid_priv->line_length +
- x * VNBYTES(vid_priv->bpix);
+ VID_TO_PIXEL(x_frac) * VNBYTES(vid_priv->bpix);
+
+ if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
+ return -EAGAIN;
for (row = 0; row < VIDEO_FONT_HEIGHT; row++) {
uchar bits = video_fontdata[ch * VIDEO_FONT_HEIGHT + row];
@@ -125,6 +130,20 @@
line += vid_priv->line_length;
}
+ return VID_TO_POS(VIDEO_FONT_WIDTH);
+}
+
+static int console_normal_probe(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;
}
@@ -138,4 +157,5 @@
.name = "vidconsole0",
.id = UCLASS_VIDEO_CONSOLE,
.ops = &console_normal_ops,
+ .probe = console_normal_probe,
};
diff --git a/drivers/video/console_rotate.c b/drivers/video/console_rotate.c
index ebb31d8..227141d 100644
--- a/drivers/video/console_rotate.c
+++ b/drivers/video/console_rotate.c
@@ -82,17 +82,22 @@
return 0;
}
-static int console_putc_xy_1(struct udevice *dev, uint x, uint y, char ch)
+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);
int pbytes = VNBYTES(vid_priv->bpix);
int i, col;
int mask = 0x80;
- void *line = vid_priv->fb + (x + 1) * vid_priv->line_length -
- (y + 1) * pbytes;
+ void *line;
uchar *pfont = video_fontdata + ch * VIDEO_FONT_HEIGHT;
+ line = vid_priv->fb + (VID_TO_PIXEL(x_frac) + 1) *
+ vid_priv->line_length - (y + 1) * 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) {
#ifdef CONFIG_VIDEO_BPP8
@@ -135,7 +140,7 @@
mask >>= 1;
}
- return 0;
+ return VID_TO_POS(VIDEO_FONT_WIDTH);
}
@@ -201,17 +206,21 @@
return 0;
}
-static int console_putc_xy_2(struct udevice *dev, uint x, uint y, char ch)
+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 i, row;
void *line;
+ if (x_frac + VID_TO_POS(vc_priv->x_charsize) > vc_priv->xsize_frac)
+ return -EAGAIN;
+
line = vid_priv->fb + (vid_priv->ysize - y - 1) *
- vid_priv->line_length +
- (vid_priv->xsize - x - VIDEO_FONT_WIDTH - 1) *
- VNBYTES(vid_priv->bpix);
+ vid_priv->line_length +
+ (vid_priv->xsize - VID_TO_PIXEL(x_frac) -
+ VIDEO_FONT_WIDTH - 1) * VNBYTES(vid_priv->bpix);
for (row = 0; row < VIDEO_FONT_HEIGHT; row++) {
uchar bits = video_fontdata[ch * VIDEO_FONT_HEIGHT + row];
@@ -259,7 +268,7 @@
line -= vid_priv->line_length;
}
- return 0;
+ return VID_TO_POS(VIDEO_FONT_WIDTH);
}
static int console_set_row_3(struct udevice *dev, uint row, int clr)
@@ -329,17 +338,22 @@
return 0;
}
-static int console_putc_xy_3(struct udevice *dev, uint x, uint y, char ch)
+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);
int pbytes = VNBYTES(vid_priv->bpix);
int i, col;
int mask = 0x80;
- void *line = vid_priv->fb + (vid_priv->ysize - x - 1) *
+ void *line = vid_priv->fb +
+ (vid_priv->ysize - VID_TO_PIXEL(x_frac) - 1) *
vid_priv->line_length + y * pbytes;
uchar *pfont = video_fontdata + ch * VIDEO_FONT_HEIGHT;
+ 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) {
#ifdef CONFIG_VIDEO_BPP8
@@ -382,17 +396,35 @@
mask >>= 1;
}
- return 0;
+ 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 *priv = dev_get_uclass_priv(dev);
- struct video_priv *vid_priv = dev_get_uclass_priv(dev->parent);
+ 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);
- priv->cols = vid_priv->ysize / VIDEO_FONT_WIDTH;
- priv->rows = vid_priv->xsize / VIDEO_FONT_HEIGHT;
+ 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;
}
@@ -426,6 +458,7 @@
.name = "vidconsole2",
.id = UCLASS_VIDEO_CONSOLE,
.ops = &console_ops_2,
+ .probe = console_probe_2,
};
U_BOOT_DRIVER(vidconsole_3) = {
diff --git a/drivers/video/vidconsole-uclass.c b/drivers/video/vidconsole-uclass.c
index 706a189..3145fd8 100644
--- a/drivers/video/vidconsole-uclass.c
+++ b/drivers/video/vidconsole-uclass.c
@@ -52,14 +52,14 @@
{
struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
- if (--priv->curr_col < 0) {
- priv->curr_col = priv->cols - 1;
- if (--priv->curr_row < 0)
- priv->curr_row = 0;
+ priv->xcur_frac -= VID_TO_POS(priv->x_charsize);
+ if (priv->xcur_frac < 0) {
+ priv->xcur_frac = (priv->cols - 1) *
+ VID_TO_POS(priv->x_charsize);
+ priv->ycur -= priv->y_charsize;
+ if (priv->ycur < 0)
+ priv->ycur = 0;
}
-
- vidconsole_putc_xy(dev, priv->curr_col * VIDEO_FONT_WIDTH,
- priv->curr_row * VIDEO_FONT_HEIGHT, ' ');
}
/* Move to a newline, scrolling the display if necessary */
@@ -71,15 +71,16 @@
const int rows = CONFIG_CONSOLE_SCROLL_LINES;
int i;
- priv->curr_col = 0;
+ priv->xcur_frac = 0;
+ priv->ycur += priv->y_charsize;
/* Check if we need to scroll the terminal */
- if (++priv->curr_row >= priv->rows) {
+ if ((priv->ycur + priv->y_charsize) / priv->y_charsize > priv->rows) {
vidconsole_move_rows(dev, 0, rows, priv->rows - rows);
for (i = 0; i < rows; i++)
vidconsole_set_row(dev, priv->rows - i - 1,
vid_priv->colour_bg);
- priv->curr_row -= rows;
+ priv->ycur -= rows * priv->y_charsize;
}
video_sync(dev->parent);
}
@@ -91,16 +92,16 @@
switch (ch) {
case '\r':
- priv->curr_col = 0;
+ priv->xcur_frac = 0;
break;
case '\n':
vidconsole_newline(dev);
break;
case '\t': /* Tab (8 chars alignment) */
- priv->curr_col += 8;
- priv->curr_col &= ~7;
+ priv->xcur_frac = ((priv->xcur_frac / priv->tab_width_frac)
+ + 1) * priv->tab_width_frac;
- if (priv->curr_col >= priv->cols)
+ if (priv->xcur_frac >= priv->xsize_frac)
vidconsole_newline(dev);
break;
case '\b':
@@ -112,13 +113,16 @@
* colour depth. Check this and return an error to help with
* diagnosis.
*/
- ret = vidconsole_putc_xy(dev,
- priv->curr_col * VIDEO_FONT_WIDTH,
- priv->curr_row * VIDEO_FONT_HEIGHT,
- ch);
- if (ret)
+ ret = vidconsole_putc_xy(dev, priv->xcur_frac, priv->ycur, ch);
+ if (ret == -EAGAIN) {
+ vidconsole_newline(dev);
+ ret = vidconsole_putc_xy(dev, priv->xcur_frac,
+ priv->ycur, ch);
+ }
+ if (ret < 0)
return ret;
- if (++priv->curr_col >= priv->cols)
+ priv->xcur_frac += ret;
+ if (priv->xcur_frac >= priv->xsize_frac)
vidconsole_newline(dev);
break;
}
@@ -148,8 +152,7 @@
struct udevice *vid = dev->parent;
struct video_priv *vid_priv = dev_get_uclass_priv(vid);
- priv->rows = vid_priv->ysize / VIDEO_FONT_HEIGHT;
- priv->cols = vid_priv->xsize / VIDEO_FONT_WIDTH;
+ priv->xsize_frac = VID_TO_POS(vid_priv->xsize);
return 0;
}
@@ -161,12 +164,16 @@
struct stdio_dev *sdev = &priv->sdev;
int ret;
+ if (!priv->tab_width_frac)
+ priv->tab_width_frac = VID_TO_POS(priv->x_charsize) * 8;
+
if (dev->seq) {
snprintf(sdev->name, sizeof(sdev->name), "vidconsole%d",
dev->seq);
} else {
strcpy(sdev->name, "vidconsole");
}
+
sdev->flags = DEV_FLAGS_OUTPUT;
sdev->putc = vidconsole_putc;
sdev->puts = vidconsole_puts;
@@ -189,9 +196,11 @@
void vidconsole_position_cursor(struct udevice *dev, unsigned col, unsigned row)
{
struct vidconsole_priv *priv = dev_get_uclass_priv(dev);
+ struct udevice *vid_dev = dev->parent;
+ struct video_priv *vid_priv = dev_get_uclass_priv(vid_dev);
- priv->curr_col = min_t(short, col, priv->cols - 1);
- priv->curr_row = min_t(short, row, priv->rows - 1);
+ priv->xcur_frac = VID_TO_POS(min_t(short, col, vid_priv->xsize - 1));
+ priv->ycur = min_t(short, row, vid_priv->ysize - 1);
}
static int do_video_setcursor(cmd_tbl_t *cmdtp, int flag, int argc,