749 lines
20 KiB
C++
749 lines
20 KiB
C++
/*
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* \brief Terminal service
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* \author Norman Feske
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* \date 2011-08-11
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*/
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/*
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* Copyright (C) 2011-2017 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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*/
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/* Genode includes */
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#include <base/component.h>
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#include <base/log.h>
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#include <base/heap.h>
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#include <framebuffer_session/connection.h>
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#include <input_session/connection.h>
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#include <timer_session/connection.h>
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#include <root/component.h>
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#include <base/attached_rom_dataspace.h>
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#include <base/attached_ram_dataspace.h>
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#include <input/event.h>
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#include <util/color.h>
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#include <os/pixel_rgb565.h>
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/* terminal includes */
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#include <terminal/decoder.h>
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#include <terminal/types.h>
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#include <terminal/scancode_tracker.h>
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#include <terminal/keymaps.h>
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#include <terminal/char_cell_array_character_screen.h>
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#include <terminal_session/terminal_session.h>
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/* nitpicker graphic back end */
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#include <nitpicker_gfx/text_painter.h>
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namespace Terminal {
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using namespace Genode;
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struct Main;
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}
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using Genode::Pixel_rgb565;
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typedef Text_painter::Font Font;
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static bool const verbose = false;
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inline Pixel_rgb565 blend(Pixel_rgb565 src, int alpha)
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{
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Pixel_rgb565 res;
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res.pixel = ((((alpha >> 3) * (src.pixel & 0xf81f)) >> 5) & 0xf81f)
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| ((( alpha * (src.pixel & 0x07c0)) >> 8) & 0x07c0);
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return res;
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}
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inline Pixel_rgb565 mix(Pixel_rgb565 p1, Pixel_rgb565 p2, int alpha)
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{
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Pixel_rgb565 res;
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/*
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* We substract the alpha from 264 instead of 255 to
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* compensate the brightness loss caused by the rounding
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* error of the blend function when having only 5 bits
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* per channel.
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*/
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res.pixel = blend(p1, 264 - alpha).pixel + blend(p2, alpha).pixel;
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return res;
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}
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using Genode::Color;
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static Color color_palette[2*8];
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static Color foreground_color(Char_cell const &cell)
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{
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Color col = color_palette[cell.colidx_fg() + (cell.highlight() ? 8 : 0)];
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if (cell.inverse())
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col = Color(col.r/2, col.g/2, col.b/2);
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return col;
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}
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static Color background_color(Char_cell const &cell)
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{
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Color col = color_palette[cell.colidx_bg() + (cell.highlight() ? 8 : 0)];
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if (cell.inverse())
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return Color((col.r + 255)/2, (col.g + 255)/2, (col.b + 255)/2);
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return col;
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}
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class Font_family
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{
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private:
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Font const &_regular;
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public:
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Font_family(Font const ®ular /* ...to be extended */ )
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: _regular(regular) { }
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/**
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* Return font for specified face
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*
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* For now, we do not support font faces other than regular.
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*/
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Font const *font(Font_face) const { return &_regular; }
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unsigned cell_width() const { return _regular.str_w("m"); }
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unsigned cell_height() const { return _regular.str_h("m"); }
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};
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template <typename PT>
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inline void draw_glyph(Color fg_color,
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Color bg_color,
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const unsigned char *glyph_base,
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unsigned glyph_width,
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unsigned glyph_img_width,
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unsigned glyph_img_height,
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unsigned cell_width,
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PT *fb_base,
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unsigned fb_width)
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{
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PT fg_pixel(fg_color.r, fg_color.g, fg_color.b);
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PT bg_pixel(bg_color.r, bg_color.g, bg_color.b);
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unsigned const horizontal_gap = cell_width
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- Genode::min(glyph_width, cell_width);
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unsigned const left_gap = horizontal_gap / 2;
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unsigned const right_gap = horizontal_gap - left_gap;
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/*
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* Clear gaps to the left and right of the character if the character's
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* with is smaller than the cell width.
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*/
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if (horizontal_gap) {
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PT *line = fb_base;
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for (unsigned y = 0 ; y < glyph_img_height; y++, line += fb_width) {
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for (unsigned x = 0; x < left_gap; x++)
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line[x] = bg_pixel;
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for (unsigned x = cell_width - right_gap; x < cell_width; x++)
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line[x] = bg_pixel;
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}
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}
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/* center glyph horizontally within its cell */
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fb_base += left_gap;
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for (unsigned y = 0 ; y < glyph_img_height; y++) {
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for (unsigned x = 0; x < glyph_width; x++)
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fb_base[x] = mix(bg_pixel, fg_pixel, glyph_base[x]);
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fb_base += fb_width;
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glyph_base += glyph_img_width;
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}
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}
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template <typename PT>
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static void convert_char_array_to_pixels(Cell_array<Char_cell> *cell_array,
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PT *fb_base,
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unsigned fb_width,
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unsigned fb_height,
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Font_family const &font_family)
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{
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Font const ®ular_font = *font_family.font(Font_face::REGULAR);
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unsigned glyph_height = regular_font.img_h,
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glyph_step_x = regular_font.wtab['m'];
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unsigned y = 0;
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for (unsigned line = 0; line < cell_array->num_lines(); line++) {
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if (cell_array->line_dirty(line)) {
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if (verbose)
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Genode::log("convert line ", line);
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unsigned x = 0;
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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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Font const *font = font_family.font(cell.font_face());
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unsigned char ascii = cell.ascii;
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if (ascii == 0)
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ascii = ' ';
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unsigned char const *glyph_base = font->img + font->otab[ascii];
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unsigned glyph_width = regular_font.wtab[ascii];
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if (x + glyph_width > fb_width) break;
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Color fg_color = foreground_color(cell);
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Color bg_color = background_color(cell);
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if (cell.has_cursor()) {
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fg_color = Color( 63, 63, 63);
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bg_color = Color(255, 255, 255);
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}
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draw_glyph<PT>(fg_color, bg_color,
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glyph_base, glyph_width,
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(unsigned)font->img_w, (unsigned)font->img_h,
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glyph_step_x, fb_base + x, fb_width);
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x += glyph_step_x;
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}
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}
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y += glyph_height;
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fb_base += fb_width*glyph_height;
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if (y + glyph_height > fb_height) break;
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}
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}
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namespace Terminal {
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struct Flush_callback : Genode::List<Flush_callback>::Element
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{
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virtual void flush() = 0;
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};
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struct Flush_callback_registry
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{
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Genode::List<Flush_callback> _list;
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Genode::Lock _lock;
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void add(Flush_callback *flush_callback)
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{
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Genode::Lock::Guard guard(_lock);
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_list.insert(flush_callback);
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}
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void remove(Flush_callback *flush_callback)
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{
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Genode::Lock::Guard guard(_lock);
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_list.remove(flush_callback);
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}
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void flush()
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{
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Genode::Lock::Guard guard(_lock);
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Flush_callback *curr = _list.first();
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for (; curr; curr = curr->next())
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curr->flush();
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}
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};
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struct Trigger_flush_callback
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{
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virtual void trigger_flush() = 0;
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};
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class Session_component : public Genode::Rpc_object<Session, Session_component>,
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public Flush_callback
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{
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private:
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Read_buffer &_read_buffer;
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Framebuffer::Session &_framebuffer;
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Flush_callback_registry &_flush_callback_registry;
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Trigger_flush_callback &_trigger_flush_callback;
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Genode::Attached_ram_dataspace _io_buffer;
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Framebuffer::Mode _fb_mode;
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Genode::Dataspace_capability _fb_ds_cap;
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unsigned _char_width;
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unsigned _char_height;
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unsigned _columns;
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unsigned _lines;
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void *_fb_addr;
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/**
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* Protect '_char_cell_array'
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*/
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Genode::Lock _lock;
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Cell_array<Char_cell> _char_cell_array;
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Char_cell_array_character_screen _char_cell_array_character_screen;
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Terminal::Decoder _decoder;
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Terminal::Position _last_cursor_pos;
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Font_family const &_font_family;
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/**
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* Initialize framebuffer-related attributes
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*/
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Genode::Dataspace_capability _init_fb()
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{
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if (_fb_mode.format() != Framebuffer::Mode::RGB565) {
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Genode::error("color mode ", _fb_mode, " not supported");
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return Genode::Dataspace_capability();
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}
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return _framebuffer.dataspace();
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}
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public:
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/**
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* Constructor
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*/
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Session_component(Genode::Env &env,
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Genode::Allocator &alloc,
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Read_buffer &read_buffer,
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Framebuffer::Session &framebuffer,
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Genode::size_t io_buffer_size,
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Flush_callback_registry &flush_callback_registry,
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Trigger_flush_callback &trigger_flush_callback,
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Font_family const &font_family)
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:
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_read_buffer(read_buffer), _framebuffer(framebuffer),
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_flush_callback_registry(flush_callback_registry),
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_trigger_flush_callback(trigger_flush_callback),
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_io_buffer(env.ram(), env.rm(), io_buffer_size),
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_fb_mode(_framebuffer.mode()),
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_fb_ds_cap(_init_fb()),
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/* take size of space character as character cell size */
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_char_width(font_family.cell_width()),
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_char_height(font_family.cell_height()),
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/* compute number of characters fitting on the framebuffer */
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_columns(_fb_mode.width()/_char_width),
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_lines(_fb_mode.height()/_char_height),
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_fb_addr(env.rm().attach(_fb_ds_cap)),
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_char_cell_array(_columns, _lines, &alloc),
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_char_cell_array_character_screen(_char_cell_array),
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_decoder(_char_cell_array_character_screen),
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_font_family(font_family)
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{
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using namespace Genode;
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log("new terminal session:");
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log(" framebuffer has mode ", _fb_mode);
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log(" character size is ", _char_width, "x", _char_height, " pixels");
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log(" terminal size is ", _columns, "x", _lines, " characters");
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framebuffer.refresh(0, 0, _fb_mode.width(), _fb_mode.height());
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_flush_callback_registry.add(this);
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}
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~Session_component()
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{
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_flush_callback_registry.remove(this);
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}
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void flush()
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{
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Genode::Lock::Guard guard(_lock);
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convert_char_array_to_pixels<Pixel_rgb565>(&_char_cell_array,
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(Pixel_rgb565 *)_fb_addr,
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_fb_mode.width(),
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_fb_mode.height(),
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_font_family);
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int first_dirty_line = 10000,
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last_dirty_line = -10000;
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for (int line = 0; line < (int)_char_cell_array.num_lines(); line++) {
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if (!_char_cell_array.line_dirty(line)) continue;
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first_dirty_line = Genode::min(line, first_dirty_line);
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last_dirty_line = Genode::max(line, last_dirty_line);
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_char_cell_array.mark_line_as_clean(line);
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}
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int num_dirty_lines = last_dirty_line - first_dirty_line + 1;
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if (num_dirty_lines > 0)
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_framebuffer.refresh(0, first_dirty_line*_char_height,
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_fb_mode.width(),
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num_dirty_lines*_char_height);
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}
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/********************************
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** Terminal session interface **
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********************************/
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Size size() { return Size(_columns, _lines); }
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bool avail() { return !_read_buffer.empty(); }
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Genode::size_t _read(Genode::size_t dst_len)
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{
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/* read data, block on first byte if needed */
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unsigned num_bytes = 0;
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unsigned char *dst = _io_buffer.local_addr<unsigned char>();
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Genode::size_t dst_size = Genode::min(_io_buffer.size(), dst_len);
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while (!_read_buffer.empty() && num_bytes < dst_size)
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dst[num_bytes++] = _read_buffer.get();
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return num_bytes;
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}
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Genode::size_t _write(Genode::size_t num_bytes)
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{
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Genode::Lock::Guard guard(_lock);
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unsigned char *src = _io_buffer.local_addr<unsigned char>();
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for (unsigned i = 0; i < num_bytes; i++) {
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/* submit character to sequence decoder */
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_decoder.insert(src[i]);
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}
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_trigger_flush_callback.trigger_flush();
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return num_bytes;
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}
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Genode::Dataspace_capability _dataspace()
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{
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return _io_buffer.cap();
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}
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void connected_sigh(Genode::Signal_context_capability sigh)
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{
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/*
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* Immediately reflect connection-established signal to the
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* client because the session is ready to use immediately after
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* creation.
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*/
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Genode::Signal_transmitter(sigh).submit();
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}
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void read_avail_sigh(Genode::Signal_context_capability cap)
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{
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_read_buffer.sigh(cap);
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}
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Genode::size_t read(void *buf, Genode::size_t) { return 0; }
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Genode::size_t write(void const *buf, Genode::size_t) { return 0; }
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};
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class Root_component : public Genode::Root_component<Session_component>
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{
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private:
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Genode::Env &_env;
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Read_buffer &_read_buffer;
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Framebuffer::Session &_framebuffer;
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Flush_callback_registry &_flush_callback_registry;
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Trigger_flush_callback &_trigger_flush_callback;
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Font_family const &_font_family;
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protected:
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Session_component *_create_session(const char *args)
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{
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Genode::log("create terminal session");
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/*
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* XXX read I/O buffer size from args
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*/
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Genode::size_t io_buffer_size = 4096;
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return new (md_alloc())
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Session_component(_env, *md_alloc(),
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_read_buffer,
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_framebuffer,
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io_buffer_size,
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_flush_callback_registry,
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_trigger_flush_callback,
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_font_family);
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}
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public:
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/**
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* Constructor
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*/
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Root_component(Genode::Env &env,
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Genode::Allocator &md_alloc,
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Read_buffer &read_buffer,
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Framebuffer::Session &framebuffer,
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Flush_callback_registry &flush_callback_registry,
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Trigger_flush_callback &trigger_flush_callback,
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Font_family const &font_family)
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:
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Genode::Root_component<Session_component>(env.ep(), md_alloc),
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_env(env),
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_read_buffer(read_buffer), _framebuffer(framebuffer),
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_flush_callback_registry(flush_callback_registry),
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_trigger_flush_callback(trigger_flush_callback),
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_font_family(font_family)
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{ }
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};
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}
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struct Terminal::Main
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{
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Genode::Env &_env;
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Framebuffer::Connection _framebuffer { _env, Framebuffer::Mode() };
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Input::Connection _input { _env };
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Timer::Connection _timer { _env };
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Heap _heap { _env.ram(), _env.rm() };
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/* input read buffer */
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Read_buffer _read_buffer;
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Terminal::Flush_callback_registry _flush_callback_registry;
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/* create root interface for service */
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Terminal::Root_component _root;
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Terminal::Scancode_tracker _scancode_tracker;
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/* state needed for key-repeat handling */
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unsigned const _repeat_delay = 250;
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unsigned const _repeat_rate = 25;
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unsigned _repeat_next = 0;
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void _handle_input();
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Signal_handler<Main> _input_handler {
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_env.ep(), *this, &Main::_handle_input };
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void _handle_key_repeat(Duration);
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Timer::One_shot_timeout<Main> _key_repeat_timeout {
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_timer, *this, &Main::_handle_key_repeat };
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|
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void _handle_flush(Duration);
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|
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/*
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* Time in milliseconds between a change of the terminal content and the
|
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* update of the pixels. By delaying the update, multiple intermediate
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* changes result in only one rendering step.
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*/
|
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unsigned const _flush_delay = 5;
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|
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bool _flush_scheduled = false;
|
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|
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void _trigger_flush()
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{
|
|
if (!_flush_scheduled) {
|
|
_flush_timeout.schedule(Microseconds{1000*_flush_delay});
|
|
_flush_scheduled = true;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Callback invoked if new terminal content appears
|
|
*/
|
|
struct Trigger_flush : Trigger_flush_callback
|
|
{
|
|
Main &_main;
|
|
void trigger_flush() override { _main._trigger_flush(); }
|
|
Trigger_flush(Main &main) : _main(main) { }
|
|
} _trigger_flush_callback { *this };
|
|
|
|
Timer::One_shot_timeout<Main> _flush_timeout {
|
|
_timer, *this, &Main::_handle_flush };
|
|
|
|
Main(Genode::Env &env,
|
|
Font_family &font_family,
|
|
unsigned char const *keymap,
|
|
unsigned char const *shift,
|
|
unsigned char const *altgr,
|
|
unsigned char const *control)
|
|
:
|
|
_env(env),
|
|
_root(_env, _heap,
|
|
_read_buffer, _framebuffer,
|
|
_flush_callback_registry,
|
|
_trigger_flush_callback,
|
|
font_family),
|
|
_scancode_tracker(keymap, shift, altgr, Terminal::control)
|
|
{
|
|
_input.sigh(_input_handler);
|
|
|
|
/* announce service at our parent */
|
|
_env.parent().announce(_env.ep().manage(_root));
|
|
}
|
|
};
|
|
|
|
|
|
void Terminal::Main::_handle_input()
|
|
{
|
|
_input.for_each_event([&] (Input::Event const &event) {
|
|
|
|
if (event.type() == Input::Event::CHARACTER) {
|
|
Input::Event::Utf8 const utf8 = event.utf8();
|
|
_read_buffer.add(utf8.b0);
|
|
if (utf8.b1) _read_buffer.add(utf8.b1);
|
|
if (utf8.b2) _read_buffer.add(utf8.b2);
|
|
if (utf8.b3) _read_buffer.add(utf8.b3);
|
|
}
|
|
|
|
bool press = (event.type() == Input::Event::PRESS ? true : false);
|
|
bool release = (event.type() == Input::Event::RELEASE ? true : false);
|
|
int keycode = event.code();
|
|
|
|
if (press || release)
|
|
_scancode_tracker.submit(keycode, press);
|
|
|
|
if (press) {
|
|
_scancode_tracker.emit_current_character(_read_buffer);
|
|
|
|
/* setup first key repeat */
|
|
_repeat_next = _repeat_delay;
|
|
}
|
|
|
|
if (release)
|
|
_repeat_next = 0;
|
|
});
|
|
|
|
if (_repeat_next)
|
|
_key_repeat_timeout.schedule(Microseconds{1000*_repeat_next});
|
|
}
|
|
|
|
|
|
void Terminal::Main::_handle_key_repeat(Duration)
|
|
{
|
|
if (_repeat_next) {
|
|
|
|
/* repeat current character or sequence */
|
|
_scancode_tracker.emit_current_character(_read_buffer);
|
|
|
|
_repeat_next = _repeat_rate;
|
|
}
|
|
|
|
_handle_input();
|
|
}
|
|
|
|
|
|
void Terminal::Main::_handle_flush(Duration)
|
|
{
|
|
_flush_scheduled = false;
|
|
_flush_callback_registry.flush();
|
|
}
|
|
|
|
|
|
/* built-in fonts */
|
|
extern char _binary_notix_8_tff_start;
|
|
extern char _binary_terminus_12_tff_start;
|
|
extern char _binary_terminus_16_tff_start;
|
|
|
|
|
|
void Component::construct(Genode::Env &env)
|
|
{
|
|
/* XXX execute constructors of global statics */
|
|
env.exec_static_constructors();
|
|
|
|
using namespace Genode;
|
|
|
|
Attached_rom_dataspace config(env, "config");
|
|
|
|
/* initialize color palette */
|
|
color_palette[0] = Color( 0, 0, 0); /* black */
|
|
color_palette[1] = Color(255, 128, 128); /* red */
|
|
color_palette[2] = Color(128, 255, 128); /* green */
|
|
color_palette[3] = Color(255, 255, 0); /* yellow */
|
|
color_palette[4] = Color(128, 128, 255); /* blue */
|
|
color_palette[5] = Color(255, 0, 255); /* magenta */
|
|
color_palette[6] = Color( 0, 255, 255); /* cyan */
|
|
color_palette[7] = Color(255, 255, 255); /* white */
|
|
|
|
/* the upper portion of the palette contains highlight colors */
|
|
for (int i = 0; i < 8; i++) {
|
|
Color col = color_palette[i];
|
|
col = Color((col.r*2)/3, (col.g*2)/3, (col.b*2)/3);
|
|
color_palette[i + 8] = col;
|
|
}
|
|
|
|
/* pick font according to config file */
|
|
char const *font_data = &_binary_terminus_16_tff_start;
|
|
try {
|
|
size_t font_size = 16;
|
|
config.xml().sub_node("font").attribute("size").value(&font_size);
|
|
|
|
switch (font_size) {
|
|
case 8: font_data = &_binary_notix_8_tff_start; break;
|
|
case 12: font_data = &_binary_terminus_12_tff_start; break;
|
|
case 16: font_data = &_binary_terminus_16_tff_start; break;
|
|
default: break;
|
|
}
|
|
} catch (...) { }
|
|
|
|
static Font font(font_data);
|
|
static Font_family font_family(font);
|
|
|
|
log("cell size is ", (int)font_family.cell_width(),
|
|
"x", (int)font_family.cell_height());
|
|
|
|
unsigned char *keymap = Terminal::usenglish_keymap;
|
|
unsigned char *shift = Terminal::usenglish_shift;
|
|
unsigned char *altgr = 0;
|
|
|
|
/*
|
|
* Read keyboard layout from config file
|
|
*/
|
|
try {
|
|
if (config.xml().sub_node("keyboard")
|
|
.attribute("layout").has_value("de")) {
|
|
keymap = Terminal::german_keymap;
|
|
shift = Terminal::german_shift;
|
|
altgr = Terminal::german_altgr;
|
|
}
|
|
} catch (...) { }
|
|
|
|
try {
|
|
if (config.xml().sub_node("keyboard")
|
|
.attribute("layout").has_value("none")) {
|
|
keymap = nullptr;
|
|
shift = nullptr;
|
|
altgr = nullptr;
|
|
}
|
|
} catch (...) { }
|
|
|
|
static Terminal::Main main(env, font_family, keymap, shift, altgr, Terminal::control);
|
|
}
|