We use a new font factory which is used to create a new font. It will later also
be used to cache fonts and select proper system fonts.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
kmscon_console_newline() can be used to produce a newline. Writing \n doesn't
work as this would write \n as character into the cell and not produce a
newline.
The console does not perform any parsing so we provide a separate function.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Remove the *_set_res() function entirely. Instead, the *_resize() function now
accepts a height argument which is used as quality hint. Internally, we compute
the texture width by the selected font plus the given height. This simplifies
the API and the internal handling and improves output on non-standard
resolutions or with non-standard fonts.
Until now it was only optimized for my 16x9 output but 5x4 output was quite
garbled.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
When creating a new font we automatically measure the average width of a
character. This allows us to draw fonts even on weird resolutions.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Forward resizing requests to the buffer but correctly update our size cache and
the cursor position.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add kmscon_console_write() to write a character to the current position of the
cursor. The cursor is automatically moved to the next cell.
Also extend the test_console example to use this new function.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We now use a proper cache for the current screen and a linked list for the
scrollback buffer. This allows fast rotations and fast access.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
There is no reason to make all tests/* apps need cairo dependencies. We pass
this parameter internally so we can safely use void*.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Resetting a char should never fail so we provide a separate function that sets a
char to its default value.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The buffer object manages the cells and scrollback buffer. It is optimized for
speed: fast rotations, fast resize, etc.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We add a new helper to initialize a new character directly to avoid two
allocations. This also refactors the character code and simplifies it alot.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Further commits will need a Signed-off-by line, otherwise I cannot accept them.
MIT license is compatible with GPL so we still can switch to GPL in the future
if we want.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This function can be used to change the content of the current cell. It
automatically moves the cursor to the next cell.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We set the font size to the absolute size we have per cell instead of using a
fixed font-size.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
A kmscon_font object is used to store the current font information. It allows to
draw any kind of UTF-8 string to the screen. Internally, it uses kmscon_glyph to
store glyph information for every character that has been drawn so redrawing it
is much faster.
Currently, we only support GLYPH_LAYOUT as caching method which is quite slow.
However, it supports any kind of input and always works. Better and faster
caching algorithms like cairo_scaled_font_t will be added later.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
A console has a fixed line and column count. Each entry is represented by a
kmscon_cell object. The console can be resized on the fly.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
A console may be displayed on multiple outputs. We allow different screen
resolutions on these outputs so we need a way to map the console image onto
different outputs.
We simply render the console image into a cairo surface with a user-given
resolution. This should be set to the highest resultion of the used outputs. The
application can now map this image onto the different framebuffers. This will
scale the image if the target framebuffer is smaller than the cairo surface.
We also do not clear the framebuffer. This should be done by the user. This
allows us to draw with alpha values and blend the console on top of the current
framebuffer. We do not have to care for background images and the application
has full control of where the console is shown.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Every cell of the console contains one single printable character. We want to be
Unicode compatible so we must support combined characters. Hence, each cell
consists of a UTF-8 string that can be drawn by pango as a single glyph.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add dummy files for the console subsystem. This subsystem will be used to draw a
console to a framebuffer. It uses pango and cairo for text-rendering and will
provide all required modification functions that the terminal emulation will
require.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
