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video: truetype: Fill in the measured line

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Create a measured line for the (single) line of text.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2025-04-02 06:29:37 +13:00
committed by Tom Rini
parent 236ae39fb0
commit a7bbc59c31
2 changed files with 38 additions and 11 deletions
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36
drivers/video/console_truetype.c
View File

@@ -737,11 +737,13 @@ static int truetype_measure(struct udevice *dev, const char *name, uint size,
struct alist *lines)
{
struct console_tt_metrics *met;
struct vidconsole_mline mline;
const char *s;
stbtt_fontinfo *font;
int lsb, advance;
const char *s;
int width;
int last;
int start;
int lastch;
int ret;
ret = get_metrics(dev, name, size, &met);
@@ -754,25 +756,39 @@ static int truetype_measure(struct udevice *dev, const char *name, uint size,
font = &met->font;
width = 0;
for (last = 0, s = text; *s; s++) {
bbox->y1 = 0;
start = 0;
for (lastch = 0, s = text; *s; s++) {
int neww;
int ch = *s;
/* Used kerning to fine-tune the position of this character */
if (last)
width += stbtt_GetCodepointKernAdvance(font, last, ch);
/* First get some basic metrics about this character */
stbtt_GetCodepointHMetrics(font, ch, &advance, &lsb);
neww = width + advance;
width += advance;
last = ch;
/* Use kerning to fine-tune the position of this character */
if (lastch)
neww += stbtt_GetCodepointKernAdvance(font, lastch, ch);
lastch = ch;
width = neww;
}
/* add the line */
mline.bbox.x0 = 0;
mline.bbox.y0 = bbox->y1;
mline.bbox.x1 = tt_ceil((double)width * met->scale);
bbox->y1 += met->font_size;
mline.bbox.y1 = bbox->y1;
mline.start = start;
mline.len = (s - text) - start;
if (lines && !alist_add(lines, mline))
return log_msg_ret("ttM", -ENOMEM);
bbox->valid = true;
bbox->x0 = 0;
bbox->y0 = 0;
bbox->x1 = tt_ceil((double)width * met->scale);
bbox->y1 = met->font_size;
return 0;
}

13
test/dm/video.c
View File

@@ -785,6 +785,7 @@ static int dm_test_font_measure(struct unit_test_state *uts)
"attempting more than you can do and for making a certainty of "
"what you try. But this principle, like others in life and "
"war, has its exceptions.";
const struct vidconsole_mline *line;
struct vidconsole_bbox bbox;
struct video_priv *priv;
struct udevice *dev, *con;
@@ -798,13 +799,23 @@ static int dm_test_font_measure(struct unit_test_state *uts)
/* this is using the Nimbus font with size of 18 pixels */
ut_assertok(uclass_get_device(UCLASS_VIDEO_CONSOLE, 0, &con));
vidconsole_position_cursor(con, 0, 0);
alist_init_struct(&lines, struct vidconsole_mline);
ut_assertok(vidconsole_measure(con, NULL, 0, test_string, &bbox,
&lines));
ut_asserteq(0, bbox.x0);
ut_asserteq(0, bbox.y0);
ut_asserteq(0x47a, bbox.x1);
ut_asserteq(0x12, bbox.y1);
ut_asserteq(0, lines.count);
ut_asserteq(1, lines.count);
line = alist_get(&lines, 0, struct vidconsole_mline);
ut_assertnonnull(line);
ut_asserteq(0, line->bbox.x0);
ut_asserteq(0, line->bbox.y0);
ut_asserteq(0x47a, line->bbox.x1);
ut_asserteq(0x12, line->bbox.y1);
ut_asserteq(0, line->start);
ut_asserteq(strlen(test_string), line->len);
return 0;
}