Provide a way to draw an unfilled box of a certain width. This is useful
for grouping menu items together.

Add a comment showing how to see the copy-framebuffer, for testing.

Signed-off-by: Simon Glass <sjg@chromium.org>

When using expo we want to be able to control the information on the
display and avoid other messages (such as USB scanning) appearing.

Add a 'quiet' flag for the console, to help with this.

The test is a little messy since stdio is still using the original
vidconsole create on start-up. So take care to use the same.

Signed-off-by: Simon Glass <sjg@chromium.org>

We want to check the display contents in expo tests, so move the two
needed functions to a new header file.

Rename them to have a video_ prefix.

Signed-off-by: Simon Glass <sjg@chromium.org>

When writing multiple lines of text we need to be able to control which
text goes on each line. Add a new vidconsole_put_stringn() function to
help with this.

Signed-off-by: Simon Glass <sjg@chromium.org>

Expo needs to be able to word-wrap lines so that they are displayed as
the user expects. Add a limit on the width of each line and support this
in the measurement algorithm.

Add a log category to truetype while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>

It is useful to be able to embed newline characters in the string and
have the text measured into multiple lines. Add support for this.

Signed-off-by: Simon Glass <sjg@chromium.org>

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

Signed-off-by: Simon Glass <sjg@chromium.org>

Update the vidconsole API so that measure() can measure multiple lines
of text. This will make it easier to implement multi-line fields in
expo.

Tidy up the function comments while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a simple test which measures a line of text using a Truetype font.

Signed-off-by: Simon Glass <sjg@chromium.org>

CONFIG_VIDEO_COPY implemented a range-based copying mechanism: If we
print a single character, it will always copy the full range of bytes
from the top left corner of the character to the lower right onto the
uncached frame buffer. This includes pretty much the full line contents
of the printed character.

Since we now have proper damage tracking, let's make use of that to reduce
the amount of data we need to copy. With this patch applied, we will only
copy the tiny rectangle surrounding characters when we print them,
speeding up the video console.

After this, changes to the main frame buffer are not immediately copied
to the copy frame buffer, but postponed until the next video device
sync. So issue an explicit sync before inspecting the copy frame buffer
contents for the video tests.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
[Alper: Rebase for fontdata->height/w, fill_part(), fix memmove(dev),
        drop from defconfig, use damage.xstart/yend, use IS_ENABLED(),
        call video_sync() before copy_fb check, update video_copy test]
Co-developed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>
Link: https://lore.kernel.org/u-boot/20230821135111.3558478-12-alpernebiyasak@gmail.com/