gsplus/src/paddles.c

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/*
GSPLUS - Advanced Apple IIGS Emulator Environment
Based on the KEGS emulator written by Kent Dickey
See COPYRIGHT.txt for Copyright information
See LICENSE.txt for license (GPL v2)
*/
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#include "defc.h"
extern int g_mouse_raw_x; /* from adb.c */
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extern int g_mouse_raw_y;
double g_paddle_trig_dcycs = 0.0;
int g_swap_paddles = 0;
int g_invert_paddles = 0;
int g_joystick_scale_factor_x = 0x100;
int g_joystick_scale_factor_y = 0x100;
int g_joystick_trim_amount_x = 0;
int g_joystick_trim_amount_y = 0;
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int g_joystick_type = JOYSTICK_TYPE_NATIVE_1; // OG Trying to set native joystick as default
int g_joystick_native_type1 = -1;
int g_joystick_native_type2 = -1;
int g_joystick_native_type = -1;
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extern int g_paddle_buttons;
int g_paddle_val[4] = { 0, 0, 0, 0 };
/* g_paddle_val[0]: Joystick X coord, [1]:Y coord */
double g_paddle_dcycs[4] = { 0.0, 0.0, 0.0, 0.0 };
/* g_paddle_dcycs are the dcycs the paddle goes to 0 */
void paddle_fixup_joystick_type() {
/* If g_joystick_type points to an illegal value, change it */
if(g_joystick_type == JOYSTICK_TYPE_NATIVE_1) {
g_joystick_native_type = g_joystick_native_type1;
if(g_joystick_native_type1 < 0) {
g_joystick_type = JOYSTICK_TYPE_KEYPAD;
printf("no joy 1 --- switching to keypad\n");
}
}
if(g_joystick_type == JOYSTICK_TYPE_NATIVE_2) {
g_joystick_native_type = g_joystick_native_type2;
if(g_joystick_native_type2 < 0) {
g_joystick_type = JOYSTICK_TYPE_KEYPAD;
printf("no joy 2 --- switching to keypad\n");
}
}
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}
void paddle_trigger(double dcycs) {
/* Called by read/write to $c070 */
g_paddle_trig_dcycs = dcycs;
/* Determine what all the paddle values are right now */
paddle_fixup_joystick_type();
switch(g_joystick_type) {
case JOYSTICK_TYPE_KEYPAD: /* Keypad Joystick */
paddle_trigger_keypad(dcycs);
break;
case JOYSTICK_TYPE_MOUSE: /* Mouse Joystick */
paddle_trigger_mouse(dcycs);
break;
case JOYSTICK_TYPE_NONE: /* Mouse Joystick */
paddle_trigger_mouse(dcycs);
break;
default:
joystick_update(dcycs);
}
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}
void paddle_trigger_mouse(double dcycs) {
int val_x, val_y;
int mouse_x, mouse_y;
val_x = 0;
mouse_x = g_mouse_raw_x;
mouse_y = g_mouse_raw_y;
/* mous_phys_x is 0->560, convert that to -32768 to + 32767 cyc */
/* So subtract 280 then mult by 117 */
val_x = (mouse_x - 280) * 117;
/* mous_phys_y is 0->384, convert that to -32768 to + 32767 cyc */
/* so subtract 192 then mult by 180 to overscale it a bit */
val_y = (mouse_y - 192) * 180;
g_paddle_val[0] = val_x;
g_paddle_val[1] = val_y;
g_paddle_val[2] = 32767;
g_paddle_val[3] = 32767;
g_paddle_buttons |= 0xc;
paddle_update_trigger_dcycs(dcycs);
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}
void paddle_trigger_keypad(double dcycs) {
int get_y;
int val_x, val_y;
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val_x = adb_get_keypad_xy(get_y=0);
val_y = adb_get_keypad_xy(get_y=1);
/* val_x and val_y are already scale -32768 to +32768 */
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g_paddle_val[0] = val_x;
g_paddle_val[1] = val_y;
g_paddle_val[2] = 32767;
g_paddle_val[3] = 32767;
g_paddle_buttons |= 0xc;
paddle_update_trigger_dcycs(dcycs);
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}
void paddle_update_trigger_dcycs(double dcycs) {
double trig_dcycs;
int val;
int paddle_num;
int scale, trim;
int i;
for(i = 0; i < 4; i++) {
paddle_num = i;
if(g_swap_paddles) {
paddle_num = i ^ 1;
}
val = g_paddle_val[paddle_num];
if(g_invert_paddles) {
val = -val;
}
/* convert -32768 to +32768 into 0->2816.0 cycles (the */
/* paddle delay const) */
/* First multiply by the scale factor to adjust range */
if(paddle_num & 1) {
scale = g_joystick_scale_factor_y;
trim = g_joystick_trim_amount_y;
} else {
scale = g_joystick_scale_factor_x;
trim = g_joystick_trim_amount_x;
}
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#if 0
if(i == 0) {
printf("val was %04x(%d) * scale %03x = %d\n",
val, val, scale, (val*scale)>>16);
}
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#endif
val = val * scale >> 16;
/* Val is now from -128 to + 128 since scale is */
/* 256=1.0, 128 = 0.5 */
val = val + 128 + trim;
if(val >= 255) {
val = 280; /* increase range */
}
trig_dcycs = dcycs + (val * 11.04);
g_paddle_dcycs[i] = trig_dcycs;
}
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}
int read_paddles(double dcycs, int paddle) {
double trig_dcycs;
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trig_dcycs = g_paddle_dcycs[paddle & 3];
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if(dcycs < trig_dcycs) {
return 0x80;
} else {
return 0x00;
}
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}
void paddle_update_buttons() {
paddle_fixup_joystick_type();
joystick_update_buttons();
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}