virtual console

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1024 c046a42c-6fe2-441c-8c8c-71466251a162

console.c

+/*
+ * QEMU graphical console
+ * 
+ * Copyright (c) 2004 Fabrice Bellard
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "vl.h"
+
+#define DEFAULT_BACKSCROLL 512
+#define MAX_CONSOLES 12
+
+#define RGBA(r, g, b, a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
+#define RGB(r, g, b) RGBA(r, g, b, 0xff)
+
+typedef struct TextCell {
+    uint8_t ch;
+    uint8_t bgcol:4;
+    uint8_t fgcol:4;
+} TextCell;
+
+#define MAX_ESC_PARAMS 3
+
+enum TTYState {
+    TTY_STATE_NORM,
+    TTY_STATE_ESC,
+    TTY_STATE_CSI,
+};
+
+struct TextConsole {
+    int text_console; /* true if text console */
+    DisplayState *ds;
+    int g_width, g_height;
+    int width;
+    int height;
+    int total_height;
+    int backscroll_height;
+    int fgcol;
+    int bgcol;
+    int x, y;
+    int y_displayed;
+    int y_base;
+    TextCell *cells;
+
+    enum TTYState state;
+    int esc_params[MAX_ESC_PARAMS];
+    int nb_esc_params;
+
+    /* kbd read handler */
+    IOReadHandler *fd_read;
+    void *fd_opaque;
+};
+
+static TextConsole *active_console;
+static TextConsole *consoles[MAX_CONSOLES];
+static int nb_consoles = 0;
+
+/* convert a RGBA color to a color index usable in graphic primitives */
+static unsigned int vga_get_color(DisplayState *ds, unsigned int rgba)
+{
+    unsigned int r, g, b, color;
+
+    switch(ds->depth) {
+#if 0
+    case 8:
+        r = (rgba >> 16) & 0xff;
+        g = (rgba >> 8) & 0xff;
+        b = (rgba) & 0xff;
+        color = (rgb_to_index[r] * 6 * 6) + 
+            (rgb_to_index[g] * 6) + 
+            (rgb_to_index[b]);
+        break;
+#endif
+    case 15:
+        r = (rgba >> 16) & 0xff;
+        g = (rgba >> 8) & 0xff;
+        b = (rgba) & 0xff;
+        color = ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3);
+        break;
+    case 16:
+        r = (rgba >> 16) & 0xff;
+        g = (rgba >> 8) & 0xff;
+        b = (rgba) & 0xff;
+        color = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
+        break;
+    case 32:
+    default:
+        color = rgba;
+        break;
+    }
+    return color;
+}
+
+static void vga_fill_rect (DisplayState *ds, 
+                           int posx, int posy, int width, int height, uint32_t color)
+{
+    uint8_t *d, *d1;
+    int x, y, bpp;
+    
+    bpp = (ds->depth + 7) >> 3;
+    d1 = ds->data + 
+        ds->linesize * posy + bpp * posx;
+    for (y = 0; y < height; y++) {
+        d = d1;
+        switch(bpp) {
+        case 1:
+            for (x = 0; x < width; x++) {
+                *((uint8_t *)d) = color;
+                d++;
+            }
+            break;
+        case 2:
+            for (x = 0; x < width; x++) {
+                *((uint16_t *)d) = color;
+                d += 2;
+            }
+            break;
+        case 4:
+            for (x = 0; x < width; x++) {
+                *((uint32_t *)d) = color;
+                d += 4;
+            }
+            break;
+        }
+        d1 += ds->linesize;
+    }
+}
+
+/* copy from (xs, ys) to (xd, yd) a rectangle of size (w, h) */
+static void vga_bitblt(DisplayState *ds, int xs, int ys, int xd, int yd, int w, int h)
+{
+    const uint8_t *s;
+    uint8_t *d;
+    int wb, y, bpp;
+
+    bpp = (ds->depth + 7) >> 3;
+    wb = w * bpp;
+    if (yd <= ys) {
+        s = ds->data + 
+            ds->linesize * ys + bpp * xs;
+        d = ds->data + 
+            ds->linesize * yd + bpp * xd;
+        for (y = 0; y < h; y++) {
+            memmove(d, s, wb);
+            d += ds->linesize;
+            s += ds->linesize;
+        }
+    } else {
+        s = ds->data + 
+            ds->linesize * (ys + h - 1) + bpp * xs;
+        d = ds->data + 
+            ds->linesize * (yd + h - 1) + bpp * xd;
+       for (y = 0; y < h; y++) {
+            memmove(d, s, wb);
+            d -= ds->linesize;
+            s -= ds->linesize;
+        }
+    }
+}
+
+/***********************************************************/
+/* basic char display */
+
+#define FONT_HEIGHT 16
+#define FONT_WIDTH 8
+
+#include "vgafont.h"
+
+#define cbswap_32(__x) \
+((uint32_t)( \
+		(((uint32_t)(__x) & (uint32_t)0x000000ffUL) << 24) | \
+		(((uint32_t)(__x) & (uint32_t)0x0000ff00UL) <<  8) | \
+		(((uint32_t)(__x) & (uint32_t)0x00ff0000UL) >>  8) | \
+		(((uint32_t)(__x) & (uint32_t)0xff000000UL) >> 24) ))
+
+#ifdef WORDS_BIGENDIAN
+#define PAT(x) x
+#else
+#define PAT(x) cbswap_32(x)
+#endif
+
+static const uint32_t dmask16[16] = {
+    PAT(0x00000000),
+    PAT(0x000000ff),
+    PAT(0x0000ff00),
+    PAT(0x0000ffff),
+    PAT(0x00ff0000),
+    PAT(0x00ff00ff),
+    PAT(0x00ffff00),
+    PAT(0x00ffffff),
+    PAT(0xff000000),
+    PAT(0xff0000ff),
+    PAT(0xff00ff00),
+    PAT(0xff00ffff),
+    PAT(0xffff0000),
+    PAT(0xffff00ff),
+    PAT(0xffffff00),
+    PAT(0xffffffff),
+};
+
+static const uint32_t dmask4[4] = {
+    PAT(0x00000000),
+    PAT(0x0000ffff),
+    PAT(0xffff0000),
+    PAT(0xffffffff),
+};
+
+static uint32_t color_table[8];
+
+static const uint32_t color_table_rgb[8] = {
+    RGB(0x00, 0x00, 0x00),
+    RGB(0xff, 0x00, 0x00),
+    RGB(0x00, 0xff, 0x00),
+    RGB(0xff, 0xff, 0x00),
+    RGB(0x00, 0x00, 0xff),
+    RGB(0xff, 0x00, 0xff),
+    RGB(0x00, 0xff, 0xff),
+    RGB(0xff, 0xff, 0xff),
+};
+
+static inline unsigned int col_expand(DisplayState *ds, unsigned int col)
+{
+    switch(ds->depth) {
+    case 8:
+        col |= col << 8;
+        col |= col << 16;
+        break;
+    case 15:
+    case 16:
+        col |= col << 16;
+        break;
+    default:
+        break;
+    }
+
+    return col;
+}
+
+static void vga_putcharxy(DisplayState *ds, int x, int y, int ch, 
+                          unsigned int fgcol, unsigned int bgcol)
+{
+    uint8_t *d;
+    const uint8_t *font_ptr;
+    unsigned int font_data, linesize, xorcol, bpp;
+    int i;
+
+    bpp = (ds->depth + 7) >> 3;
+    d = ds->data + 
+        ds->linesize * y * FONT_HEIGHT + bpp * x * FONT_WIDTH;
+    linesize = ds->linesize;
+    font_ptr = vgafont16 + FONT_HEIGHT * ch;
+    xorcol = bgcol ^ fgcol;
+    switch(ds->depth) {
+    case 8:
+        for(i = 0; i < FONT_HEIGHT; i++) {
+            font_data = *font_ptr++;
+            ((uint32_t *)d)[0] = (dmask16[(font_data >> 4)] & xorcol) ^ bgcol;
+            ((uint32_t *)d)[1] = (dmask16[(font_data >> 0) & 0xf] & xorcol) ^ bgcol;
+            d += linesize;
+        }
+        break;
+    case 16:
+    case 15:
+        for(i = 0; i < FONT_HEIGHT; i++) {
+            font_data = *font_ptr++;
+            ((uint32_t *)d)[0] = (dmask4[(font_data >> 6)] & xorcol) ^ bgcol;
+            ((uint32_t *)d)[1] = (dmask4[(font_data >> 4) & 3] & xorcol) ^ bgcol;
+            ((uint32_t *)d)[2] = (dmask4[(font_data >> 2) & 3] & xorcol) ^ bgcol;
+            ((uint32_t *)d)[3] = (dmask4[(font_data >> 0) & 3] & xorcol) ^ bgcol;
+            d += linesize;
+        }
+        break;
+    case 32:
+        for(i = 0; i < FONT_HEIGHT; i++) {
+            font_data = *font_ptr++;
+            ((uint32_t *)d)[0] = (-((font_data >> 7)) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[1] = (-((font_data >> 6) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[2] = (-((font_data >> 5) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[3] = (-((font_data >> 4) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[4] = (-((font_data >> 3) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[5] = (-((font_data >> 2) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[6] = (-((font_data >> 1) & 1) & xorcol) ^ bgcol;
+            ((uint32_t *)d)[7] = (-((font_data >> 0) & 1) & xorcol) ^ bgcol;
+            d += linesize;
+        }
+        break;
+    }
+}
+
+static void text_console_resize(TextConsole *s)
+{
+    TextCell *cells, *c, *c1;
+    int w1, x, y, last_width;
+
+    last_width = s->width;
+    s->width = s->g_width / FONT_WIDTH;
+    s->height = s->g_height / FONT_HEIGHT;
+
+    w1 = last_width;
+    if (s->width < w1)
+        w1 = s->width;
+
+    cells = qemu_malloc(s->width * s->total_height * sizeof(TextCell));
+    for(y = 0; y < s->total_height; y++) {
+        c = &cells[y * s->width];
+        if (w1 > 0) {
+            c1 = &s->cells[y * last_width];
+            for(x = 0; x < w1; x++) {
+                *c++ = *c1++;
+            }
+        }
+        for(x = w1; x < s->width; x++) {
+            c->ch = ' ';
+            c->fgcol = 7;
+            c->bgcol = 0;
+            c++;
+        }
+    }
+    free(s->cells);
+    s->cells = cells;
+}
+
+static void update_xy(TextConsole *s, int x, int y)
+{
+    TextCell *c;
+    int y1, y2;
+
+    if (s == active_console) {
+        y1 = (s->y_base + y) % s->total_height;
+        y2 = y1 - s->y_displayed;
+        if (y2 < 0)
+            y2 += s->total_height;
+        if (y2 < s->height) {
+            c = &s->cells[y1 * s->width + x];
+            vga_putcharxy(s->ds, x, y2, c->ch, 
+                          color_table[c->fgcol], color_table[c->bgcol]);
+            dpy_update(s->ds, x * FONT_WIDTH, y2 * FONT_HEIGHT, 
+                       FONT_WIDTH, FONT_HEIGHT);
+        }
+    }
+}
+
+static void console_show_cursor(TextConsole *s, int show)
+{
+    TextCell *c;
+    int y, y1;
+
+    if (s == active_console) {
+        y1 = (s->y_base + s->y) % s->total_height;
+        y = y1 - s->y_displayed;
+        if (y < 0)
+            y += s->total_height;
+        if (y < s->height) {
+            c = &s->cells[y1 * s->width + s->x];
+            if (show) {
+                vga_putcharxy(s->ds, s->x, y, c->ch, 
+                              color_table[0], color_table[7]);
+            } else {
+                vga_putcharxy(s->ds, s->x, y, c->ch, 
+                              color_table[c->fgcol], color_table[c->bgcol]);
+            }
+            dpy_update(s->ds, s->x * FONT_WIDTH, y * FONT_HEIGHT, 
+                       FONT_WIDTH, FONT_HEIGHT);
+        }
+    }
+}
+
+static void console_refresh(TextConsole *s)
+{
+    TextCell *c;
+    int x, y, y1;
+
+    if (s != active_console) 
+        return;
+
+    vga_fill_rect(s->ds, 0, 0, s->ds->width, s->ds->height,
+                  color_table[0]);
+    y1 = s->y_displayed;
+    for(y = 0; y < s->height; y++) {
+        c = s->cells + y1 * s->width;
+        for(x = 0; x < s->width; x++) {
+            vga_putcharxy(s->ds, x, y, c->ch, 
+                          color_table[c->fgcol], color_table[c->bgcol]);
+            c++;
+        }
+        if (++y1 == s->total_height)
+            y1 = 0;
+    }
+    dpy_update(s->ds, 0, 0, s->ds->width, s->ds->height);
+    console_show_cursor(s, 1);
+}
+
+static void console_scroll(int ydelta)
+{
+    TextConsole *s;
+    int i, y1;
+    
+    s = active_console;
+    if (!s || !s->text_console)
+        return;
+
+    if (ydelta > 0) {
+        for(i = 0; i < ydelta; i++) {
+            if (s->y_displayed == s->y_base)
+                break;
+            if (++s->y_displayed == s->total_height)
+                s->y_displayed = 0;
+        }
+    } else {
+        ydelta = -ydelta;
+        i = s->backscroll_height;
+        if (i > s->total_height - s->height)
+            i = s->total_height - s->height;
+        y1 = s->y_base - i;
+        if (y1 < 0)
+            y1 += s->total_height;
+        for(i = 0; i < ydelta; i++) {
+            if (s->y_displayed == y1)
+                break;
+            if (--s->y_displayed < 0)
+                s->y_displayed = s->total_height - 1;
+        }
+    }
+    console_refresh(s);
+}
+
+static void console_put_lf(TextConsole *s)
+{
+    TextCell *c;
+    int x, y1;
+
+    s->x = 0;
+    s->y++;
+    if (s->y >= s->height) {
+        s->y = s->height - 1;
+        
+        if (s->y_displayed == s->y_base) {
+            if (++s->y_displayed == s->total_height)
+                s->y_displayed = 0;
+        }
+        if (++s->y_base == s->total_height)
+            s->y_base = 0;
+        if (s->backscroll_height < s->total_height)
+            s->backscroll_height++;
+        y1 = (s->y_base + s->height - 1) % s->total_height;
+        c = &s->cells[y1 * s->width];
+        for(x = 0; x < s->width; x++) {
+            c->ch = ' ';
+            c->fgcol = s->fgcol;
+            c->bgcol = s->bgcol;
+            c++;
+        }
+        if (s == active_console && s->y_displayed == s->y_base) {
+            vga_bitblt(s->ds, 0, FONT_HEIGHT, 0, 0, 
+                       s->width * FONT_WIDTH, 
+                       (s->height - 1) * FONT_HEIGHT);
+            vga_fill_rect(s->ds, 0, (s->height - 1) * FONT_HEIGHT,
+                          s->width * FONT_WIDTH, FONT_HEIGHT, 
+                          color_table[s->bgcol]);
+            dpy_update(s->ds, 0, 0, 
+                       s->width * FONT_WIDTH, s->height * FONT_HEIGHT);
+        }
+    }
+}
+
+static void console_putchar(TextConsole *s, int ch)
+{
+    TextCell *c;
+    int y1, i, x;
+
+    switch(s->state) {
+    case TTY_STATE_NORM:
+        switch(ch) {
+        case '\r':
+            s->x = 0;
+            break;
+        case '\n':
+            console_put_lf(s);
+            break;
+        case 27:
+            s->state = TTY_STATE_ESC;
+            break;
+        default:
+            y1 = (s->y_base + s->y) % s->total_height;
+            c = &s->cells[y1 * s->width + s->x];
+            c->ch = ch;
+            c->fgcol = s->fgcol;
+            c->bgcol = s->bgcol;
+            update_xy(s, s->x, s->y);
+            s->x++;
+            if (s->x >= s->width)
+                console_put_lf(s);
+            break;
+        }
+        break;
+    case TTY_STATE_ESC:
+        if (ch == '[') {
+            for(i=0;i<MAX_ESC_PARAMS;i++)
+                s->esc_params[i] = 0;
+            s->nb_esc_params = 0;
+            s->state = TTY_STATE_CSI;
+        } else {
+            s->state = TTY_STATE_NORM;
+        }
+        break;
+    case TTY_STATE_CSI:
+        if (ch >= '0' && ch <= '9') {
+            if (s->nb_esc_params < MAX_ESC_PARAMS) {
+                s->esc_params[s->nb_esc_params] = 
+                    s->esc_params[s->nb_esc_params] * 10 + ch - '0';
+            }
+        } else {
+            s->nb_esc_params++;
+            if (ch == ';')
+                break;
+            s->state = TTY_STATE_NORM;
+            switch(ch) {
+            case 'D':
+                if (s->x > 0)
+                    s->x--;
+                break;
+            case 'C':
+                if (s->x < (s->width - 1))
+                    s->x++;
+                break;
+            case 'K':
+                /* clear to eol */
+                y1 = (s->y_base + s->y) % s->total_height;
+                for(x = s->x; x < s->width; x++) {
+                    c = &s->cells[y1 * s->width + x];
+                    c->ch = ' ';
+                    c->fgcol = s->fgcol;
+                    c->bgcol = s->bgcol;
+                    c++;
+                    update_xy(s, x, s->y);
+                }
+                break;
+            default:
+                break;
+            }
+            break;
+        }
+    }
+}
+
+void console_select(unsigned int index)
+{
+    TextConsole *s;
+    
+    if (index >= MAX_CONSOLES)
+        return;
+    s = consoles[index];
+    if (s) {
+        active_console = s;
+        if (s->text_console) {
+            if (s->g_width != s->ds->width ||
+                s->g_height != s->ds->height)
+                text_console_resize(s);
+            console_refresh(s);
+        }
+    }
+}
+
+static int console_puts(CharDriverState *chr, const uint8_t *buf, int len)
+{
+    TextConsole *s = chr->opaque;
+    int i;
+
+    console_show_cursor(s, 0);
+    for(i = 0; i < len; i++) {
+        console_putchar(s, buf[i]);
+    }
+    console_show_cursor(s, 1);
+    return len;
+}
+
+static void console_chr_add_read_handler(CharDriverState *chr, 
+                                         IOCanRWHandler *fd_can_read, 
+                                         IOReadHandler *fd_read, void *opaque)
+{
+    TextConsole *s = chr->opaque;
+    s->fd_read = fd_read;
+    s->fd_opaque = opaque;
+}
+
+/* called when an ascii key is pressed */
+void kbd_put_keysym(int keysym)
+{
+    TextConsole *s;
+    uint8_t buf[16], *q;
+    int c;
+
+    s = active_console;
+    if (!s || !s->text_console)
+        return;
+
+    switch(keysym) {
+    case QEMU_KEY_CTRL_UP:
+        console_scroll(-1);
+        break;
+    case QEMU_KEY_CTRL_DOWN:
+        console_scroll(1);
+        break;
+    case QEMU_KEY_CTRL_PAGEUP:
+        console_scroll(-10);
+        break;
+    case QEMU_KEY_CTRL_PAGEDOWN:
+        console_scroll(10);
+        break;
+    default:
+        if (s->fd_read) {
+            /* convert the QEMU keysym to VT100 key string */
+            q = buf;
+            if (keysym >= 0xe100 && keysym <= 0xe11f) {
+                *q++ = '\033';
+                *q++ = '[';
+                c = keysym - 0xe100;
+                if (c >= 10)
+                    *q++ = '0' + (c / 10);
+                *q++ = '0' + (c % 10);
+                *q++ = '~';
+            } else if (keysym >= 0xe120 && keysym <= 0xe17f) {
+                *q++ = '\033';
+                *q++ = '[';
+                *q++ = keysym & 0xff;
+            } else {
+                *q++ = keysym;
+            }
+            s->fd_read(s->fd_opaque, buf, q - buf);
+        }
+        break;
+    }
+}
+
+TextConsole *graphic_console_init(DisplayState *ds)
+{
+    TextConsole *s;
+
+    if (nb_consoles >= MAX_CONSOLES)
+        return NULL;
+    s = qemu_mallocz(sizeof(TextConsole));
+    if (!s) {
+        return NULL;
+    }
+    if (!active_console)
+        active_console = s;
+    s->ds = ds;
+    consoles[nb_consoles++] = s;
+    return s;
+}
+
+int is_active_console(TextConsole *s)
+{
+    return s == active_console;
+}
+
+CharDriverState *text_console_init(DisplayState *ds)
+{
+    CharDriverState *chr;
+    TextConsole *s;
+    int i;
+    static int color_inited;
+    
+    chr = qemu_mallocz(sizeof(CharDriverState));
+    if (!chr)
+        return NULL;
+    s = graphic_console_init(ds);
+    if (!s) {
+        free(chr);
+        return NULL;
+    }
+    s->text_console = 1;
+    chr->opaque = s;
+    chr->chr_write = console_puts;
+    chr->chr_add_read_handler = console_chr_add_read_handler;
+    if (!color_inited) {
+        color_inited = 1;
+        for(i = 0; i < 8; i++) {
+            color_table[i] = col_expand(s->ds, 
+                                        vga_get_color(s->ds, color_table_rgb[i]));
+        }
+    }
+    s->y_displayed = 0;
+    s->y_base = 0;
+    s->total_height = DEFAULT_BACKSCROLL;
+    s->x = 0;
+    s->y = 0;
+    s->fgcol = 7;
+    s->bgcol = 0;
+    s->g_width = s->ds->width;
+    s->g_height = s->ds->height;
+    text_console_resize(s);
+
+    return chr;
+}