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terminal: modernize color palette
The terminal now got a configurable palette for 16 colors (8 normal, 8
bright/bold).
<config>
<palette>
<color index="0" value="#000000"/> <!-- black is real black -->
<color index="8" value="#101010"/> <!-- bright black stands out a bit -->
</palette>
</config>
Note, the old (undocumented) <color index="..." bg="..."> configuration
scheme is no longer supported.
Also, this commit adds a pleasing default palette that ensures
readability of ViM's standard hightlighting.
Fixes #3406
This commit is contained in:
Christian Helmuth
parent
72478a9e31
commit
ae7fbd6b1a
@ -22,5 +22,5 @@
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<default-policy root="/fonts" />
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<!-- color definition when this file is used as terminal config -->
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<color index="0" bg="#1c2232"/>
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<palette> <color index="0" value="#1c2232"/> </palette>
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</config>
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@ -244,8 +244,10 @@
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<resource name="RAM" quantum="4M"/>
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<provides> <service name="Terminal"/> </provides>
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<config>
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<color index="0" bg="#2f3953"/>
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<color index="8" bg="#2f3953"/>
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<palette>
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<color index="0" value="#2f3953"/>
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<color index="8" value="#2f3953"/>
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</palette>
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<vfs>
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<rom name="VeraMono.ttf"/>
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<dir name="fonts">
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@ -956,9 +956,11 @@ void Sculpt::Main::_handle_nitpicker_mode()
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xml.node("default-policy", [&] () { xml.attribute("root", "/fonts"); });
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auto gen_color = [&] (unsigned index, Color color) {
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xml.node("palette", [&] () {
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xml.node("color", [&] () {
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xml.attribute("index", index);
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xml.attribute("bg", String<16>(color));
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xml.attribute("value", String<16>(color));
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});
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});
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};
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19
repos/gems/src/server/terminal/README
Normal file
19
repos/gems/src/server/terminal/README
Normal file
@ -0,0 +1,19 @@
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This is a graphical terminal implementation. It provides the Terminal
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service and uses a nitpicker session for screen representation.
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Configuration
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~~~~~~~~~~~~~
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The default color palette can be configured via the <palette> XML
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configuration node like follows. There are 16 colors configurable -
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index 0-7 normal color and index 8-15 bright (bold) colors.
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! <config>
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! <palette>
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! <color index="0" value="#000000"/> <!-- black is real black -->
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! <color index="8" value="#101010"/> <!-- bright black stands out a bit -->
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! </palette>
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! ...
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! </config>
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@ -1,11 +1,12 @@
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/*
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* \brief Terminal color palette
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* \author Norman Feske
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* \author Christian Helmuth
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* \date 2018-02-06
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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* Copyright (C) 2018-2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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@ -16,6 +17,7 @@
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/* Genode includes */
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#include <util/color.h>
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#include <util/xml_node.h>
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/* local includes */
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#include "types.h"
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@ -33,44 +35,61 @@ class Terminal::Color_palette
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struct Highlighted { bool value; };
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struct Inverse { bool value; };
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private:
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enum { NUM_COLORS = 16U };
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Color _colors[NUM_COLORS];
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static constexpr char const * _default_palette {
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"<palette>"
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" <color index=\"0\" value=\"#000000\"/>" /* black */
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" <color index=\"1\" value=\"#AC4142\"/>" /* red */
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" <color index=\"2\" value=\"#90A959\"/>" /* green */
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" <color index=\"3\" value=\"#F4BF75\"/>" /* yellow */
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" <color index=\"4\" value=\"#6A9FB5\"/>" /* blue */
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" <color index=\"5\" value=\"#AA759F\"/>" /* magenta */
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" <color index=\"6\" value=\"#75B5AA\"/>" /* cyan */
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" <color index=\"7\" value=\"#D0D0D0\"/>" /* white */
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" <color index=\"8\" value=\"#101010\"/>" /* bright black */
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" <color index=\"9\" value=\"#AC4142\"/>" /* bright red */
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" <color index=\"10\" value=\"#90A959\"/>" /* bright green */
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" <color index=\"11\" value=\"#F4BF75\"/>" /* bright yellow */
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" <color index=\"12\" value=\"#6A9FB5\"/>" /* bright blue */
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" <color index=\"13\" value=\"#AA759F\"/>" /* bright magenta */
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" <color index=\"14\" value=\"#75B5AA\"/>" /* bright cyan */
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" <color index=\"15\" value=\"#F5F5F5\"/>" /* bright white */
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"</palette>" };
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Genode::Xml_node const _default { _default_palette };
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void _apply_palette(Xml_node palette)
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{
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palette.for_each_sub_node("color", [&] (Xml_node node) {
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if (!node.has_attribute("index")) return;
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if (!node.has_attribute("value")) return;
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unsigned const index = node.attribute_value("index", 0U);
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if (!(index <= NUM_COLORS)) return;
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_colors[index] = node.attribute_value("value", Color());
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});
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}
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public:
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Color_palette()
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{
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_colors[0] = Color( 0, 0, 0); /* black */
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_colors[1] = Color(255, 128, 128); /* red */
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_colors[2] = Color(128, 255, 128); /* green */
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_colors[3] = Color(255, 255, 0); /* yellow */
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_colors[4] = Color(128, 128, 255); /* blue */
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_colors[5] = Color(255, 0, 255); /* magenta */
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_colors[6] = Color( 0, 255, 255); /* cyan */
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_colors[7] = Color(255, 255, 255); /* white */
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/* the upper portion of the palette contains highlight colors */
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for (unsigned i = 0; i < NUM_COLORS/2; i++) {
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Color const col = _colors[i];
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_colors[i + NUM_COLORS/2] = Color((col.r*2)/3, (col.g*2)/3, (col.b*2)/3);
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}
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_apply_palette(_default);
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}
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void apply_config(Xml_node config)
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{
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config.for_each_sub_node("color", [&] (Xml_node color) {
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unsigned const index = min(color.attribute_value("index", 0U), 15U);
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Color const bg = color.attribute_value("bg", Color());
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_colors[index] = bg;
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});
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_apply_palette(_default);
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if (config.has_sub_node("palette"))
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_apply_palette(config.sub_node("palette"));
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}
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Color foreground(Index index, Highlighted highlighted, Inverse inverse) const
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Color foreground(Index index, Highlighted highlighted) const
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{
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if (index.value >= NUM_COLORS/2)
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return Color(0, 0, 0);
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@ -78,18 +97,15 @@ class Terminal::Color_palette
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Color const col =
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_colors[index.value + (highlighted.value ? NUM_COLORS/2 : 0)];
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return (inverse.value) ? Color(col.r/2, col.g/2, col.b/2) : col;
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return col;
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}
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Color background(Index index, Highlighted highlighted, Inverse inverse) const
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Color background(Index index, Highlighted highlighted) const
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{
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Color const color =
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_colors[index.value + (highlighted.value ? NUM_COLORS/2 : 0)];
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Color const color = foreground(index, highlighted);
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return (inverse.value) ? Color((color.r + 255)/2,
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(color.g + 255)/2,
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(color.b + 255)/2)
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: color;
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/* reduce the intensity of background colors */
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return Color(color.r*3/4, color.g*3/4, color.b*3/4);
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}
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};
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@ -1,6 +1,7 @@
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/*
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* \brief Terminal graphics backend for textual screen
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* \author Norman Feske
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* \author Christian Helmuth
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* \date 2018-02-06
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*/
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@ -177,8 +178,7 @@ class Terminal::Text_screen_surface
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{
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Color const bg_color =
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_palette.background(Color_palette::Index{0},
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Color_palette::Highlighted{false},
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Color_palette::Inverse{false});
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Color_palette::Highlighted{false});
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Rect r[4] { };
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Rect const all(Point(0, 0), _geometry.fb_size);
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_geometry.fb_rect().cut(_geometry.used_rect(), &r[0], &r[1], &r[2], &r[3]);
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@ -197,20 +197,24 @@ class Terminal::Text_screen_surface
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Fixpoint_number x { (int)_geometry.start().x() };
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for (unsigned column = 0; column < _cell_array.num_cols(); column++) {
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Char_cell cell = _cell_array.get_cell(column, line);
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Char_cell const cell = _cell_array.get_cell(column, line);
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_font.apply_glyph(cell.codepoint(), [&] (Glyph_painter::Glyph const &glyph) {
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Color_palette::Highlighted const highlighted { cell.highlight() };
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Color_palette::Inverse const inverse { cell.inverse() };
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Color fg_color =
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_palette.foreground(Color_palette::Index{cell.colidx_fg()},
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highlighted, inverse);
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Color_palette::Index fg_idx { cell.colidx_fg() };
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Color_palette::Index bg_idx { cell.colidx_bg() };
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Color bg_color =
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_palette.background(Color_palette::Index{cell.colidx_bg()},
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highlighted, inverse);
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/* swap color index for inverse cells */
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if (cell.inverse()) {
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Color_palette::Index tmp { fg_idx };
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fg_idx = bg_idx;
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bg_idx = tmp;
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}
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Color fg_color = _palette.foreground(fg_idx, highlighted);
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Color bg_color = _palette.background(bg_idx, highlighted);
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if (cell.has_cursor()) {
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fg_color = Color( 63, 63, 63);
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