162 lines
4.3 KiB
C
162 lines
4.3 KiB
C
/*
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* Copyright (c) 2008-2010, 2015 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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/**
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* @file
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* @brief Manage graphics console
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*
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* This file contains functions to provide stdout to the graphics console.
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*
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* @ingroup graphics
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*/
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#include <lk/debug.h>
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#include <assert.h>
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#include <lib/io.h>
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#include <lk/init.h>
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#include <lib/gfx.h>
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#include <lib/gfxconsole.h>
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#include <lib/font.h>
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#include <dev/display.h>
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/** @addtogroup graphics
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* @{
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*/
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/**
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* @brief Represent state of graphics console
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*/
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static struct {
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gfx_surface *surface;
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uint rows, columns;
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uint extray; // extra pixels left over if the rows doesn't fit precisely
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uint x, y;
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uint32_t front_color;
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uint32_t back_color;
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} gfxconsole;
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static void gfxconsole_putc(char c) {
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static enum { NORMAL, ESCAPE } state = NORMAL;
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static uint32_t p_num = 0;
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switch (state) {
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case NORMAL: {
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if (c == '\n' || c == '\r') {
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gfxconsole.x = 0;
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gfxconsole.y++;
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} else if (c == 0x1b) {
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p_num = 0;
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state = ESCAPE;
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} else {
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font_draw_char(gfxconsole.surface, c, gfxconsole.x * FONT_X, gfxconsole.y * FONT_Y, gfxconsole.front_color);
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gfxconsole.x++;
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}
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break;
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}
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case ESCAPE: {
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if (c >= '0' && c <= '9') {
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p_num = (p_num * 10) + (c - '0');
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} else if (c == 'D') {
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if (p_num <= gfxconsole.x)
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gfxconsole.x -= p_num;
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state = NORMAL;
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} else if (c == '[') {
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// eat this character
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} else {
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font_draw_char(gfxconsole.surface, c, gfxconsole.x * FONT_X, gfxconsole.y * FONT_Y, gfxconsole.front_color);
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gfxconsole.x++;
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state = NORMAL;
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}
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break;
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}
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}
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if (gfxconsole.x >= gfxconsole.columns) {
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gfxconsole.x = 0;
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gfxconsole.y++;
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}
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if (gfxconsole.y >= gfxconsole.rows) {
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// scroll up
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gfx_copyrect(gfxconsole.surface, 0, FONT_Y, gfxconsole.surface->width, gfxconsole.surface->height - FONT_Y - gfxconsole.extray, 0, 0);
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gfxconsole.y--;
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gfx_fillrect(gfxconsole.surface, 0, gfxconsole.surface->height - FONT_Y - gfxconsole.extray, gfxconsole.surface->width, FONT_Y, gfxconsole.back_color);
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gfx_flush(gfxconsole.surface);
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}
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}
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void gfxconsole_print_callback(print_callback_t *cb, const char *str, size_t len) {
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for (size_t i = 0; i < len; i++) {
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gfxconsole_putc(str[i]);
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}
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}
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static print_callback_t cb = {
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.entry = { 0 },
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.print = gfxconsole_print_callback,
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.context = NULL
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};
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/**
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* @brief Initialize graphics console on given drawing surface.
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*
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* The graphics console subsystem is initialized, and registered as
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* an output device for debug output.
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*/
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void gfxconsole_start(gfx_surface *surface) {
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DEBUG_ASSERT(gfxconsole.surface == NULL);
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// set up the surface
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gfxconsole.surface = surface;
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// calculate how many rows/columns we have
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gfxconsole.rows = surface->height / FONT_Y;
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gfxconsole.columns = surface->width / FONT_X;
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gfxconsole.extray = surface->height - (gfxconsole.rows * FONT_Y);
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dprintf(SPEW, "gfxconsole: rows %d, columns %d, extray %d\n", gfxconsole.rows, gfxconsole.columns, gfxconsole.extray);
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// start in the upper left
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gfxconsole.x = 0;
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gfxconsole.y = 0;
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// colors are white and black for now
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gfxconsole.front_color = 0xffffffff;
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gfxconsole.back_color = 0;
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// register for debug callbacks
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register_print_callback(&cb);
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}
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/**
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* @brief Initialize graphics console on default display
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*/
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void gfxconsole_start_on_display(void) {
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static bool started = false;
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if (started)
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return;
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/* pop up the console */
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struct display_framebuffer fb;
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if (display_get_framebuffer(&fb) < 0)
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return;
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gfx_surface *s = gfx_create_surface_from_display(&fb);
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gfxconsole_start(s);
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started = true;
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}
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static void gfxconsole_init_hook(uint level) {
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gfxconsole_start_on_display();
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}
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LK_INIT_HOOK(gfxconsole, &gfxconsole_init_hook, LK_INIT_LEVEL_PLATFORM);
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