Added files and got initial support working. ZX81 display needed.

1 files changed, 428 insertions, 0 deletions

diff --git a/source/keyboard.c b/source/keyboard.c
new file mode 100644
index 0000000..a08b72d
--- /dev/null
+++ b/source/keyboard.c
@@ -0,0 +1,428 @@
+/*
+   3ds81 - Nintendo 3DS ZX81 emulator.
+
+   Copyright (C) 2021  Ian Cowburn <ianc@noddybox.co.uk>
+   
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; either version 2
+   of the License, or (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>
+  
+   $Id: keyboard.c 64 2008-12-05 00:37:26Z ianc $
+*/
+
+#include <3ds.h>
+
+#include "keyboard.h"
+#include "framebuffer.h"
+#include "stream.h"
+
+/* ---------------------------------------- STATIC DATA
+*/
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+static int selection_on = COL_WHITE;
+static int selection_off = COL_BLACK;
+
+static struct
+{
+    int	state;
+    int	new_state;
+    int	handled;
+    int is_sticky;
+} key_state[NUM_SOFT_KEYS];
+
+static SoftKey	pad_left_key	= SK_5;
+static SoftKey	pad_right_key	= SK_8;
+static SoftKey	pad_up_key	= SK_7;
+static SoftKey	pad_down_key	= SK_6;
+static SoftKey	pad_A_key	= SK_0;
+static SoftKey	pad_B_key	= SK_NEWLINE;
+static SoftKey	pad_X_key	= NUM_SOFT_KEYS;
+static SoftKey	pad_Y_key	= NUM_SOFT_KEYS;
+static SoftKey	pad_R_key	= NUM_SOFT_KEYS;
+static SoftKey	pad_L_key	= NUM_SOFT_KEYS;
+static SoftKey	pad_start_key	= NUM_SOFT_KEYS;
+static SoftKey	pad_select_key	= NUM_SOFT_KEYS;
+
+#define CLEAR_STATE(SHORTCUT)					\
+	do							\
+	{							\
+	    if (SHORTCUT != NUM_SOFT_KEYS &&			\
+		!key_state[SHORTCUT].handled)			\
+	    {							\
+		key_state[SHORTCUT].new_state = FALSE;		\
+	    }							\
+	} while(0)
+
+#define CHECK_STATE(KEYS,BIT,CODE,SHORTCUT,USE_SHORTCUT)	\
+	do							\
+	{							\
+	    key_state[CODE].new_state = (KEYS & BIT);		\
+	    if (USE_SHORTCUT && SHORTCUT != NUM_SOFT_KEYS &&	\
+		!key_state[SHORTCUT].handled && (KEYS & BIT))	\
+	    {							\
+		key_state[SHORTCUT].new_state = TRUE;		\
+	    }							\
+	} while(0)
+
+#define CELL_WIDTH      32
+#define CELL_HEIGHT     48
+
+static const char *keynames[]=
+{
+    "1", "2", "3", "4", "5",
+    "6", "7", "8", "9", "0",
+    "Q", "W", "E", "R", "T",
+    "Y", "U", "I", "O", "P",
+    "A", "S", "D", "F", "G",
+    "H", "J", "K", "L", "NEWLINE",
+    "SHIFT", "Z", "X", "C", "V",
+    "B", "N", "M", "PERIOD", "SPACE",
+
+    "ABOUT",
+    "CONFIG",
+    "JOYPAD UP",
+    "JOYPAD DOWN",
+    "JOYPAD LEFT",
+    "JOYPAD RIGHT",
+    "A BUTTON",
+    "B BUTTON",
+    "X BUTTON",
+    "Y BUTTON",
+    "RIGHT SHOULDER BUTTON",
+    "LEFT SHOULDER BUTTON",
+    "START BUTTON",
+    "SELECT BUTTON"
+};
+
+/* ---------------------------------------- PRIVATE INTERFACES
+*/
+static SoftKey LocatePress(const touchPosition *p)
+{
+    int kx=0,ky=0;
+    int key = NUM_SOFT_KEYS;
+
+    kx = p->px / CELL_WIDTH;
+    ky = p->py / CELL_HEIGHT;
+
+    key = kx + ky * 10;
+
+    if (key>SK_SPACE)
+    {
+	key = NUM_SOFT_KEYS;
+    }
+
+    return key;
+}
+
+
+static void DrawSelect(Framebuffer *fb, int key, int selected)
+{
+    int x,y;
+
+    x = (key % 10) * CELL_WIDTH;
+    y = (key / 10) * CELL_HEIGHT;
+    
+    FB_Box(fb, x, fb->height - 1 - y, CELL_WIDTH, CELL_HEIGHT,
+                selected ? selection_on : selection_off);
+}
+
+
+static int GetEvent(SoftKeyEvent *ev, int map)
+{
+    static SoftKey last = NUM_SOFT_KEYS;
+    static int poll_index = -1;
+    Framebuffer lower;
+
+    FB_StartFrame(NULL, &lower);
+
+    /* Read the keys if this is a new loop
+    */
+    if (poll_index == -1)
+    {
+	int f;
+	u32 keys;
+
+	keys = keysHeld();
+
+	/* Clear the non-sticky keys
+	*/
+	for(f=SK_1; f<=SK_CONFIG; f++)
+	{
+	    key_state[f].handled = FALSE;
+
+	    if (key_state[f].is_sticky)
+	    {
+		key_state[f].new_state = key_state[f].state;
+	    }
+	    else
+	    {
+		key_state[f].new_state = FALSE;
+	    }
+	}
+
+	/* Check the soft keyboard
+	*/
+	if (keys & KEY_TOUCH)
+	{
+	    touchPosition tp;
+
+            hidTouchRead(&tp);
+
+            if (tp.py>192)
+            {
+                key_state[SK_CONFIG].new_state = TRUE;
+            }
+            else
+            {
+                SoftKey press;
+
+                press = LocatePress(&tp);
+
+                if (press != NUM_SOFT_KEYS)
+                {
+                    key_state[press].handled = TRUE;
+
+                    if (key_state[press].is_sticky)
+                    {
+                        if (last != press)
+                        {
+                            key_state[press].new_state =
+                                        !key_state[press].state;
+                        }
+                    }
+                    else
+                    {
+                        key_state[press].new_state = TRUE;
+                    }
+
+                    last = press;
+                }
+            }
+	}
+	else
+	{
+	    last = NUM_SOFT_KEYS;
+	}
+
+	/* Check non soft-keyboard controls
+	*/
+	CHECK_STATE(keys, KEY_A,	SK_PAD_A,	pad_A_key,	map);
+	CHECK_STATE(keys, KEY_B,	SK_PAD_B,	pad_B_key,	map);
+	CHECK_STATE(keys, KEY_X,	SK_PAD_X,	pad_X_key,	map);
+	CHECK_STATE(keys, KEY_Y,	SK_PAD_Y,	pad_Y_key,	map);
+	CHECK_STATE(keys, KEY_R,	SK_PAD_R,	pad_R_key,	map);
+	CHECK_STATE(keys, KEY_L,	SK_PAD_L,	pad_L_key,	map);
+	CHECK_STATE(keys, KEY_START,	SK_PAD_START,	pad_start_key,	map);
+	CHECK_STATE(keys, KEY_SELECT,	SK_PAD_SELECT,	pad_select_key,	map);
+	CHECK_STATE(keys, KEY_UP,	SK_PAD_UP,	pad_up_key,	map);
+	CHECK_STATE(keys, KEY_DOWN,	SK_PAD_DOWN,	pad_down_key,	map);
+	CHECK_STATE(keys, KEY_LEFT,	SK_PAD_LEFT,	pad_left_key,	map);
+	CHECK_STATE(keys, KEY_RIGHT,	SK_PAD_RIGHT,	pad_right_key,	map);
+
+	/* Reset key event poll index
+	*/
+	poll_index = 0;
+
+	/* Update any on-screen indicators
+	*/
+	for(f=SK_1; f<SK_CONFIG; f++)
+	{
+	    if (key_state[f].state != key_state[f].new_state)
+	    {
+                DrawSelect(&lower, f, key_state[f].new_state);
+	    }
+	}
+    }
+
+    while(poll_index < NUM_SOFT_KEYS &&
+    		key_state[poll_index].state == key_state[poll_index].new_state)
+    {
+    	poll_index++;
+    }
+
+    if (poll_index < NUM_SOFT_KEYS)
+    {
+	key_state[poll_index].state = key_state[poll_index].new_state;
+
+	ev->key = poll_index;
+	ev->pressed = key_state[poll_index].state;
+
+	return TRUE;
+    }
+    else
+    {
+    	poll_index = -1;
+	return FALSE;
+    }
+}
+
+
+/* ---------------------------------------- PUBLIC INTERFACES
+*/
+void SK_DisplayKeyboard(void)
+{
+    int f;
+    Framebuffer lower;
+
+    FB_StartFrame(NULL, &lower);
+
+    FB_Blit(&lower,IMG_KEYBOARD,0,0);
+
+    /* Update any on-screen indicators
+    */
+    for(f=SK_1; f<SK_CONFIG; f++)
+    {
+	if (key_state[f].state)
+	{
+            DrawSelect(&lower, f, key_state[f].state);
+	}
+    }
+}
+
+
+int SK_GetEvent(SoftKeyEvent *ev)
+{
+    return GetEvent(ev,TRUE);
+}
+
+
+int SK_GetBareEvent(SoftKeyEvent *ev)
+{
+    return GetEvent(ev,FALSE);
+}
+
+
+void SK_SetSticky(SoftKey key, int is_sticky)
+{
+    key_state[key].is_sticky = is_sticky;
+
+    if (!is_sticky)
+    {
+	key_state[key].new_state = FALSE;
+    }
+}
+
+
+void SK_DefinePad(SoftKey pad, SoftKey key)
+{
+    switch(pad)
+    {
+	case SK_PAD_LEFT:
+	    pad_left_key = key;
+	    break;
+	case SK_PAD_RIGHT:
+	    pad_right_key = key;
+	    break;
+	case SK_PAD_UP:
+	    pad_up_key = key;
+	    break;
+	case SK_PAD_DOWN:
+	    pad_down_key = key;
+	    break;
+	case SK_PAD_A:
+	    pad_A_key = key;
+	    break;
+	case SK_PAD_B:
+	    pad_B_key = key;
+	    break;
+	case SK_PAD_X:
+	    pad_X_key = key;
+	    break;
+	case SK_PAD_Y:
+	    pad_Y_key = key;
+	    break;
+	case SK_PAD_R:
+	    pad_R_key = key;
+	    break;
+	case SK_PAD_L:
+	    pad_L_key = key;
+	    break;
+	case SK_PAD_START:
+	    pad_start_key = key;
+	    break;
+	case SK_PAD_SELECT:
+	    pad_select_key = key;
+	    break;
+	default:
+	    break;
+    }
+}
+
+
+const char *SK_KeyName(SoftKey k)
+{
+    return keynames[k];
+}
+
+
+void SK_SaveSnapshot(FILE *fp)
+{
+    int f;
+
+    PUT_Long(fp, pad_left_key);
+    PUT_Long(fp, pad_right_key);
+    PUT_Long(fp, pad_up_key);
+    PUT_Long(fp, pad_down_key);
+    PUT_Long(fp, pad_A_key);
+    PUT_Long(fp, pad_B_key);
+    PUT_Long(fp, pad_X_key);
+    PUT_Long(fp, pad_Y_key);
+    PUT_Long(fp, pad_R_key);
+    PUT_Long(fp, pad_L_key);
+    PUT_Long(fp, pad_start_key);
+    PUT_Long(fp, pad_select_key);
+
+    for(f = 0; f < NUM_SOFT_KEYS; f++)
+    {
+    	PUT_Long(fp, key_state[f].state);
+    	PUT_Long(fp, key_state[f].new_state);
+    	PUT_Long(fp, key_state[f].handled);
+    	PUT_Long(fp, key_state[f].is_sticky);
+    }
+}
+
+
+void SK_LoadSnapshot(FILE *fp)
+{
+    int f;
+
+    pad_left_key = GET_Long(fp);
+    pad_right_key = GET_Long(fp);
+    pad_up_key = GET_Long(fp);
+    pad_down_key = GET_Long(fp);
+    pad_A_key = GET_Long(fp);
+    pad_B_key = GET_Long(fp);
+    pad_X_key = GET_Long(fp);
+    pad_Y_key = GET_Long(fp);
+    pad_R_key = GET_Long(fp);
+    pad_L_key = GET_Long(fp);
+    pad_start_key = GET_Long(fp);
+    pad_select_key = GET_Long(fp);
+
+    for(f = 0; f < NUM_SOFT_KEYS; f++)
+    {
+    	key_state[f].state = GET_Long(fp);
+    	key_state[f].new_state = GET_Long(fp);
+    	key_state[f].handled = GET_Long(fp);
+    	key_state[f].is_sticky = GET_Long(fp);
+    }
+}
+
+