This fixes the console and terminal layer to use the new text renderer
instead of the old one.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Xterm supports CSIs which simply move the visible buffer up/down so we
need these helpers to perform such operations from the VTE layer.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
If the background color is identical to the background-color of the glyph
to be drawn, then we can skip drawing the background. This increases
performance a _lot_.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Implement left and right tab movement in console backend. This is used by
the VTE layer to interpret different VT escape sequences and the tabulator
character.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Protected erase means erasing parts of the screen but preventing protected
characters from being erase. Protecting a character is done by setting
character attributes similarly to colors and backgrounds. Both are reset
on hard erase, soft-reset or screen clearance.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
ICH is used to insert characters into the current line. DCH is used to
delete characters from the current line. They act as described in vt220
manual.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add three helpers to set and reset tab-stops. They will be used by the VTE
layer to add and remove tab-stops when requested by the application.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This adds two functions to retrieve x/y positions of the cursor. This can
be used to save and restore cursor positions.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The 'M' CSI mode is used to delete lines. This implements this mode
similar to the "INSERT LINES" CSI.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The IL CSI ('L') is used to insert a given number of lines at the current
cursor position. All lines below are moved down.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This is a rewrite of the whole console layer so we can remove the
kmscon_buffer object to speed up the console.
This removes the split between the scroll region and the two margins so we
can resize margins in O(1). This also correctly merges the remaining
console modes so vte does not have to track them.
Btw. vim runs smoothly on kmscon with this console layer now (finally!).
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
In inverse screen mode we switch background and foreground colors. As our
console layer supports transparent backgrounds, we have to do this in the
terminal layer.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This adds a new function that allows external subsystems to retrieve the
current flags of the console.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Instead of writing a function for each mode we now accept flags for the
console object. For now the flags are unused but other flags will be
added.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
VT510 manual says auto-wrap is disabled by default but most applications
(including bash) expect it to be on, therefore we enable it by default.
The console layer already supported it but the vte layer wasn't hooked up.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
When INSERT mode is enabled, we move all following characters to the right
and drop all characters that are moved beyond the margin.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This dummy is supposed to hard-reset the console. As the console is far
from finished, we keep it as dummy and implement this later.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This function is not needed at all. Instead, we should simply move one
character to the left on incoming backspace. There is no need to handle
auto-wrap on backspace.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This adds support for colored and bold characters. This also adds the
infrastrucure for background colors and underlined characters, however,
these are not properly implemented, yet.
The color codes are similar to xterm and optimized on black backgrounds.
So they are not too bright or shiny.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Instead of using the slow old font-factory we now use the new font_screen
object which allows faster software rendering with pango/cairo.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The buffer should not be accessed from code outside of console.c so make
it private. This includes some code-moving but no bigger changes. The diff
might look scary, though.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add new helper to console subsystem which performs a backspace
operation. We must take care of auto-wrap mode so we cannot simply use
the *_move_left() function.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add functions to move the cursor up/down/left/right. We must take care
of integer overflows here as the application may send us arbitrarily big
numbers.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
*_move_to() can be used to position the pointer at an arbitrary position
inside the buffer. If in relative-addressing mode, you cannot position
it outside the scroll-region, though.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This function is no longer needed as we now have proper scrolling
functions. This also adjusts the buffer tests to be more appropriate.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Add two new functions to rotate the scroll-area of the buffer. We push
lines to the scroll-back buffer if they are pushed out to the top. Lines
pushed out to the bottom are simply freed.
We never take back lines from the scrollback buffer as applications
expect the new lines to be empty.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Allow external subsystems to modify the margin sizes. When setting the
margins we must take care to first perform the shrink operation and then
the grow operations. For instance, if our current top margin is 10 and
the bottom margin is 0 and the application requests to swap the margin
sizes, we should *first* shrink the top margin to 0 and then grow the
bottom margin to 10. Otherwise, we might end up with garbled margins on
a buffer which is smaller than 20 lines.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We do no rotation so rename the function to the more appropriate name
kmscon_console_newline.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The new function can be used by the UI to clear the current scrollback
buffer to free resources or whatever. It will also be used by the CSI
handler to reset the console.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
The maximum scrollback-buffer size can now be changed on the fly. We
also reduce the current buffer size to the new size so we do not need to
clear the console to flush the scrollback buffer.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
We now properly draw fonts with OpenGL. We now use FreeType2 instead of
pango to avoid big dependencies.
We also add a DejaVu font so we currently don't have to deal with font
selection.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
To switch to the new drawing subsystem we need a reference to a valid
compositor object so we can retrieve the GL context.
This also applies to the terminal object.
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
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>
