/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2012 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 of the License, or (at your option) any later version.

This library 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

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

#include "SDL_config.h"

/*

* GEM SDL video driver implementation

* inspired from the Dummy SDL driver

*

* Patrice Mandin

* and work from

* Olivier Landemarre, Johan Klockars, Xavier Joubert, Claude Attard

*/

#include <gem.h>

#include "SDL_timer.h"

#include "../../events/SDL_sysevents.h"

#include "../../events/SDL_events_c.h"

#include "SDL_gemvideo.h"

#include "SDL_gemevents_c.h"

#include "SDL_gemmouse_c.h"

#include "../ataricommon/SDL_atarikeys.h" /* for keyboard scancodes */

#include "../ataricommon/SDL_atarievents_c.h"

#include "../ataricommon/SDL_xbiosevents_c.h"

#include "../ataricommon/SDL_ataridevmouse_c.h"

/* Duration after which we consider key released */

#define KEY_PRESS_DURATION 100

#define MSG_SDL_ID (('S'<<8)|'D')

/* Variables */

static unsigned char gem_currentkeyboard[ATARIBIOS_MAXKEYS];

static unsigned char gem_previouskeyboard[ATARIBIOS_MAXKEYS];

static Uint32 keyboard_ticks[ATARIBIOS_MAXKEYS];

static short prevmx=0,prevmy=0,prevmb=0;

static short dummy_msgbuf[8] = {MSG_SDL_ID,0,0,0, 0,0,0,0};

/* Functions prototypes */

static int do_messages(_THIS, short *message, short latest_msg_id);

static void do_keyboard(short kc, Uint32 tick);

static void do_keyboard_special(short ks, Uint32 tick);

static void do_mouse_motion(_THIS, short mx, short my);

static void do_mouse_buttons(_THIS, short mb);

static int mouse_in_work_area(int winhandle, short mx, short my);

static void clearKeyboardState(Uint32 tick);

/* Functions */

void GEM_InitOSKeymap(_THIS)

{

SDL_memset(gem_currentkeyboard, 0, sizeof(gem_currentkeyboard));

SDL_memset(gem_previouskeyboard, 0, sizeof(gem_previouskeyboard));

SDL_memset(keyboard_ticks, 0, sizeof(keyboard_ticks));

/* Mouse init */

GEM_mouse_relative = SDL_FALSE;

SDL_Atari_InitInternalKeymap(this);

}

void GEM_PumpEvents(_THIS)

{

short prevkc=0, mousex, mousey, mouseb, kstate;

int i, quit = 0;

SDL_keysym keysym;

Uint32 cur_tick;

static Uint32 prev_now = 0, prev_msg = 0;

static short latest_msg_id = 0;

cur_tick = SDL_GetTicks();

if (prev_now == cur_tick) {

return;

}

prev_now = cur_tick;

SDL_AtariMint_BackgroundTasks();

clearKeyboardState(cur_tick);

if (prev_msg) {

/* Wait at least 20ms before each event processing loop */

if (cur_tick-prev_msg < 20) {

return;

}

}

prev_msg = cur_tick;

dummy_msgbuf[1] = ++latest_msg_id;

if (appl_write(GEM_ap_id, sizeof(dummy_msgbuf), dummy_msgbuf) == 0) {

/* If it fails, wait for previous id */

--latest_msg_id;

}

while (!quit) {

int resultat;

short buffer[8], kc, dummy;

resultat = evnt_multi(

MU_MESAG|MU_TIMER|MU_KEYBD,

0,0,0,

0,0,0,0,0,

0,0,0,0,0,

buffer,

1000,

&dummy,&dummy,&dummy,&kstate,&kc,&dummy

);

/* Message event ? */

if (resultat & MU_MESAG)

quit = do_messages(this, buffer, latest_msg_id);

/* Keyboard event ? */

if (resultat & MU_KEYBD) {

do_keyboard_special(kstate, cur_tick);

if (prevkc != kc) {

do_keyboard(kc, cur_tick);

prevkc = kc;

}

}

/* Timer event ? Just used as a safeguard */

if (resultat & MU_TIMER) {

quit = 1;

}

}

GEM_CheckMouseMode(this);

/* Update mouse state */

graf_mkstate(&mousex, &mousey, &mouseb, &kstate);

do_keyboard_special(kstate, cur_tick);

do_mouse_motion(this, mousex, mousey);

do_mouse_buttons(this, mouseb);

/* Now generate keyboard events */

for (i=0; i<ATARIBIOS_MAXKEYS; i++) {

/* Key pressed ? */

if (gem_currentkeyboard[i] && !gem_previouskeyboard[i])

SDL_PrivateKeyboard(SDL_PRESSED,

SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));

/* Key unpressed ? */

if (gem_previouskeyboard[i] && !gem_currentkeyboard[i])

SDL_PrivateKeyboard(SDL_RELEASED,

SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));

}

SDL_memcpy(gem_previouskeyboard,gem_currentkeyboard,sizeof(gem_previouskeyboard));

/* Refresh window name ? */

if (GEM_refresh_name) {

const char *window_name =

(SDL_GetAppState() & SDL_APPACTIVE)

? GEM_title_name : GEM_icon_name;

if (window_name) {

wind_set(GEM_handle,WF_NAME,

(short)(((unsigned long)window_name)>>16),

(short)(((unsigned long)window_name) & 0xffff),

0,0);

}

GEM_refresh_name = SDL_FALSE;

}

}

static int do_messages(_THIS, short *message, short latest_msg_id)

{

int quit, update_work_area, align_work_area, sdl_resize;

quit = update_work_area = align_work_area = sdl_resize = 0;

switch (message[0]) {

case MSG_SDL_ID:

quit=(message[1] == latest_msg_id);

break;

case WM_CLOSED:

case AP_TERM:

SDL_PrivateQuit();

quit=1;

break;

case WM_MOVED:

wind_set(message[3],WF_CURRXYWH,message[4],message[5],message[6],message[7]);

update_work_area = align_work_area = 1;

break;

case WM_TOPPED:

wind_set(message[3],WF_TOP,message[4],0,0,0);

/* Continue with TOP event processing */

case WM_ONTOP:

SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);

if (VDI_setpalette) {

VDI_setpalette(this, VDI_curpalette);

}

break;

case WM_REDRAW:

if (!GEM_lock_redraw) {

GEM_wind_redraw(this, message[3],&message[4]);

}

break;

case WM_ICONIFY:

case WM_ALLICONIFY:

wind_set (message[3],WF_ICONIFY,message[4],message[5],message[6],message[7]);

/* If we're active, make ourselves inactive */

if ( SDL_GetAppState() & SDL_APPACTIVE ) {

/* Send an internal deactivate event */

SDL_PrivateAppActive(0, SDL_APPACTIVE);

}

/* Update window title */

if (GEM_refresh_name && GEM_icon_name) {

wind_set(GEM_handle,WF_NAME,

(short)(((unsigned long)GEM_icon_name)>>16),

(short)(((unsigned long)GEM_icon_name) & 0xffff),

0,0);

GEM_refresh_name = SDL_FALSE;

}

update_work_area = 1;

break;

case WM_UNICONIFY:

wind_set (message[3],WF_UNICONIFY,message[4],message[5],message[6],message[7]);

/* If we're not active, make ourselves active */

if ( !(SDL_GetAppState() & SDL_APPACTIVE) ) {

/* Send an internal activate event */

SDL_PrivateAppActive(1, SDL_APPACTIVE);

}

if (GEM_refresh_name && GEM_title_name) {

wind_set(GEM_handle,WF_NAME,

(short)(((unsigned long)GEM_title_name)>>16),

(short)(((unsigned long)GEM_title_name) & 0xffff),

0,0);

GEM_refresh_name = SDL_FALSE;

}

update_work_area = align_work_area = 1;

break;

case WM_SIZED:

wind_set (message[3], WF_CURRXYWH, message[4], message[5], message[6], message[7]);

update_work_area = align_work_area = sdl_resize = 1;

GEM_win_fulled = SDL_FALSE; /* Cancel maximized flag */

GEM_lock_redraw = SDL_TRUE; /* Prevent redraw till buffers resized */

break;

case WM_FULLED:

{

short x,y,w,h;

if (GEM_win_fulled) {

wind_get (message[3], WF_PREVXYWH, &x, &y, &w, &h);

GEM_win_fulled = SDL_FALSE;

} else {

x = GEM_desk_x;

y = GEM_desk_y;

w = GEM_desk_w;

h = GEM_desk_h;

GEM_win_fulled = SDL_TRUE;

}

wind_set (message[3], WF_CURRXYWH, x, y, w, h);

update_work_area = align_work_area = sdl_resize = 1;

GEM_lock_redraw = SDL_TRUE; /* Prevent redraw till buffers resized */

}

break;

case WM_BOTTOMED:

wind_set(message[3],WF_BOTTOM,0,0,0,0);

/* Continue with BOTTOM event processing */

case WM_UNTOPPED:

SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);

if (VDI_setpalette) {

VDI_setpalette(this, VDI_oldpalette);

}

break;

}

if (update_work_area) {

GEM_align_work_area(this, message[3], 1);

if (sdl_resize) {

SDL_PrivateResize(GEM_work_w, GEM_work_h);

}

}

return quit;

}

static void do_keyboard(short kc, Uint32 tick)

{

int scancode;

if (kc) {

scancode=(kc>>8) & (ATARIBIOS_MAXKEYS-1);

gem_currentkeyboard[scancode]=0xFF;

keyboard_ticks[scancode]=tick;

}

}

static void do_keyboard_special(short ks, Uint32 tick)

{

int scancode=0;

/* Read special keys */

if (ks & K_RSHIFT)

scancode=SCANCODE_RIGHTSHIFT;

if (ks & K_LSHIFT)

scancode=SCANCODE_LEFTSHIFT;

if (ks & K_CTRL)

scancode=SCANCODE_LEFTCONTROL;

if (ks & K_ALT)

scancode=SCANCODE_LEFTALT;

if (scancode) {

gem_currentkeyboard[scancode]=0xFF;

keyboard_ticks[scancode]=tick;

}

}

static void do_mouse_motion(_THIS, short mx, short my)

{

short x2, y2, w2, h2;

if (this->input_grab == SDL_GRAB_OFF) {

/* Switch mouse focus state */

if (!GEM_fullscreen && (GEM_handle>=0)) {

SDL_PrivateAppActive(

mouse_in_work_area(GEM_handle, mx,my),

SDL_APPMOUSEFOCUS);

}

}

GEM_CheckMouseMode(this);

/* Don't return mouse events if out of window */

if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS)==0) {

return;

}

/* Relative mouse motion ? */

if (GEM_mouse_relative) {

if (GEM_usedevmouse) {

SDL_AtariDevMouse_PostMouseEvents(this, SDL_FALSE);

} else {

SDL_AtariXbios_PostMouseEvents(this, SDL_FALSE);

}

return;

}

/* Retrieve window coords, and generate mouse events accordingly */

x2 = y2 = 0;

w2 = VDI_w;

h2 = VDI_h;

if ((!GEM_fullscreen) && (GEM_handle>=0)) {

x2 = GEM_work_x;

y2 = GEM_work_y;

w2 = GEM_work_w;

h2 = GEM_work_h;

}

if ((prevmx!=mx) || (prevmy!=my)) {

int posx, posy;

/* Give mouse position relative to window position */

posx = mx - x2;

if (posx<0) posx = 0;

if (posx>w2) posx = w2-1;

posy = my - y2;

if (posy<0) posy = 0;

if (posy>h2) posy = h2-1;

SDL_PrivateMouseMotion(0, 0, posx, posy);

}

prevmx = mx;

prevmy = my;

}

static void do_mouse_buttons(_THIS, short mb)

{

int i;

/* Don't return mouse events if out of window */

if ((SDL_GetAppState() & SDL_APPMOUSEFOCUS)==0)

return;

if (prevmb==mb)

return;

for (i=0;i<3;i++) {

int curbutton, prevbutton;

curbutton = mb & (1<<i);

prevbutton = prevmb & (1<<i);

if (curbutton && !prevbutton) {

SDL_PrivateMouseButton(SDL_PRESSED, i+1, 0, 0);

}

if (!curbutton && prevbutton) {

SDL_PrivateMouseButton(SDL_RELEASED, i+1, 0, 0);

}

}

prevmb = mb;

}

/* Check if mouse in visible area of the window */

static int mouse_in_work_area(int winhandle, short mx, short my)

{

short todo[4];

short inside[4] = {mx,my,1,1};

/* Browse the rectangle list */

if (wind_get(winhandle, WF_FIRSTXYWH, &todo[0], &todo[1], &todo[2], &todo[3])!=0) {

while (todo[2] && todo[3]) {

if (rc_intersect((GRECT *)inside,(GRECT *)todo)) {

return 1;

}

if (wind_get(winhandle, WF_NEXTXYWH, &todo[0], &todo[1], &todo[2], &todo[3])==0) {

break;

}

}

}

return 0;

}

/* Clear key state for which we did not receive events for a while */

static void clearKeyboardState(Uint32 tick)

{

int i;

for (i=0; i<ATARIBIOS_MAXKEYS; i++) {

if (keyboard_ticks[i]) {

if (tick-keyboard_ticks[i] > KEY_PRESS_DURATION) {

gem_currentkeyboard[i]=0;

keyboard_ticks[i]=0;

}

}

}

}