SameBoy/Cocoa/GBView.m

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#import <Carbon/Carbon.h>
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#import "GBView.h"
#import "GBViewGL.h"
#import "GBViewMetal.h"
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#import "GBButtons.h"
#import "NSString+StringForKey.h"
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#define JOYSTICK_HIGH 0x4000
#define JOYSTICK_LOW 0x3800
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@implementation GBView
{
uint32_t *image_buffers[3];
unsigned char current_buffer;
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BOOL mouse_hidden;
NSTrackingArea *tracking_area;
BOOL _mouseHidingEnabled;
bool axisActive[2];
bool underclockKeyDown;
double clockMultiplier;
NSEventModifierFlags previousModifiers;
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}
+ (instancetype)alloc
{
return [self allocWithZone:NULL];
}
+ (instancetype)allocWithZone:(struct _NSZone *)zone
{
if (self == [GBView class]) {
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if ([GBViewMetal isSupported]) {
return [GBViewMetal allocWithZone: zone];
}
return [GBViewGL allocWithZone: zone];
}
return [super allocWithZone:zone];
}
- (void) createInternalView
{
assert(false && "createInternalView must not be inherited");
}
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- (void) _init
{
image_buffers[0] = malloc(160 * 144 * 4);
image_buffers[1] = malloc(160 * 144 * 4);
image_buffers[2] = malloc(160 * 144 * 4);
_shouldBlendFrameWithPrevious = 1;
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(ratioKeepingChanged) name:@"GBAspectChanged" object:nil];
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tracking_area = [ [NSTrackingArea alloc] initWithRect:(NSRect){}
options:NSTrackingMouseEnteredAndExited | NSTrackingActiveAlways | NSTrackingInVisibleRect
owner:self
userInfo:nil];
[self addTrackingArea:tracking_area];
clockMultiplier = 1.0;
[self createInternalView];
[self addSubview:self.internalView];
self.internalView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable;
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}
- (void) ratioKeepingChanged
{
[self setFrame:self.superview.frame];
}
- (void) setShouldBlendFrameWithPrevious:(BOOL)shouldBlendFrameWithPrevious
{
_shouldBlendFrameWithPrevious = shouldBlendFrameWithPrevious;
[self setNeedsDisplay:YES];
}
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- (unsigned char) numberOfBuffers
{
return _shouldBlendFrameWithPrevious? 3 : 2;
}
- (void)dealloc
{
free(image_buffers[0]);
free(image_buffers[1]);
free(image_buffers[2]);
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if (mouse_hidden) {
mouse_hidden = false;
[NSCursor unhide];
}
[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
- (instancetype)initWithCoder:(NSCoder *)coder
{
if (!(self = [super initWithCoder:coder]))
{
return self;
}
[self _init];
return self;
}
- (instancetype)initWithFrame:(NSRect)frameRect
{
if (!(self = [super initWithFrame:frameRect]))
{
return self;
}
[self _init];
return self;
}
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- (void)setFrame:(NSRect)frame
{
frame = self.superview.frame;
if (![[NSUserDefaults standardUserDefaults] boolForKey:@"GBAspectRatioUnkept"]) {
double ratio = frame.size.width / frame.size.height;
if (ratio >= 160.0/144.0) {
double new_width = round(frame.size.height / 144.0 * 160.0);
frame.origin.x = floor((frame.size.width - new_width) / 2);
frame.size.width = new_width;
frame.origin.y = 0;
}
else {
double new_height = round(frame.size.width / 160.0 * 144.0);
frame.origin.y = floor((frame.size.height - new_height) / 2);
frame.size.height = new_height;
frame.origin.x = 0;
}
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}
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[super setFrame:frame];
}
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- (void) flip
{
if (underclockKeyDown && clockMultiplier > 0.5) {
clockMultiplier -= 0.1;
GB_set_clock_multiplier(_gb, clockMultiplier);
}
if (!underclockKeyDown && clockMultiplier < 1.0) {
clockMultiplier += 0.1;
GB_set_clock_multiplier(_gb, clockMultiplier);
}
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current_buffer = (current_buffer + 1) % self.numberOfBuffers;
}
- (uint32_t *) pixels
{
return image_buffers[(current_buffer + 1) % self.numberOfBuffers];
}
-(void)keyDown:(NSEvent *)theEvent
{
unsigned short keyCode = theEvent.keyCode;
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bool handled = false;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
for (GBButton i = 0; i < GBButtonCount; i++) {
if ([defaults integerForKey:button_to_preference_name(i)] == keyCode) {
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handled = true;
switch (i) {
case GBTurbo:
GB_set_turbo_mode(_gb, true, self.isRewinding);
break;
case GBRewind:
self.isRewinding = true;
GB_set_turbo_mode(_gb, false, false);
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break;
case GBUnderclock:
underclockKeyDown = true;
break;
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default:
GB_set_key_state(_gb, (GB_key_t)i, true);
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break;
}
}
}
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if (!handled && [theEvent type] != NSEventTypeFlagsChanged) {
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[super keyDown:theEvent];
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}
}
-(void)keyUp:(NSEvent *)theEvent
{
unsigned short keyCode = theEvent.keyCode;
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bool handled = false;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
for (GBButton i = 0; i < GBButtonCount; i++) {
if ([defaults integerForKey:button_to_preference_name(i)] == keyCode) {
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handled = true;
switch (i) {
case GBTurbo:
GB_set_turbo_mode(_gb, false, false);
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break;
case GBRewind:
self.isRewinding = false;
break;
case GBUnderclock:
underclockKeyDown = false;
break;
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default:
GB_set_key_state(_gb, (GB_key_t)i, false);
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break;
}
}
}
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if (!handled && [theEvent type] != NSEventTypeFlagsChanged) {
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[super keyUp:theEvent];
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}
}
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- (void) joystick:(NSString *)joystick_name button: (unsigned)button changedState: (bool) state
{
UpdateSystemActivity(UsrActivity);
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NSDictionary *mapping = [[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBJoypadMappings"][joystick_name];
for (GBButton i = 0; i < GBButtonCount; i++) {
NSNumber *mapped_button = [mapping objectForKey:GBButtonNames[i]];
if (mapped_button && [mapped_button integerValue] == button) {
switch (i) {
case GBTurbo:
GB_set_turbo_mode(_gb, state, state && self.isRewinding);
break;
case GBRewind:
self.isRewinding = state;
if (state) {
GB_set_turbo_mode(_gb, false, false);
}
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break;
case GBUnderclock:
underclockKeyDown = state;
break;
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default:
GB_set_key_state(_gb, (GB_key_t)i, state);
break;
}
}
}
}
- (void) joystick:(NSString *)joystick_name axis: (unsigned)axis movedTo: (signed) value
{
UpdateSystemActivity(UsrActivity);
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NSDictionary *mapping = [[NSUserDefaults standardUserDefaults] dictionaryForKey:@"GBJoypadMappings"][joystick_name];
NSNumber *x_axis = [mapping objectForKey:@"XAxis"];
NSNumber *y_axis = [mapping objectForKey:@"YAxis"];
if (axis == [x_axis integerValue]) {
if (value > JOYSTICK_HIGH) {
axisActive[0] = true;
GB_set_key_state(_gb, GB_KEY_RIGHT, true);
GB_set_key_state(_gb, GB_KEY_LEFT, false);
}
else if (value < -JOYSTICK_HIGH) {
axisActive[0] = true;
GB_set_key_state(_gb, GB_KEY_RIGHT, false);
GB_set_key_state(_gb, GB_KEY_LEFT, true);
}
else if (axisActive[0] && value < JOYSTICK_LOW && value > -JOYSTICK_LOW) {
axisActive[0] = false;
GB_set_key_state(_gb, GB_KEY_RIGHT, false);
GB_set_key_state(_gb, GB_KEY_LEFT, false);
}
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}
else if (axis == [y_axis integerValue]) {
if (value > JOYSTICK_HIGH) {
axisActive[1] = true;
GB_set_key_state(_gb, GB_KEY_DOWN, true);
GB_set_key_state(_gb, GB_KEY_UP, false);
}
else if (value < -JOYSTICK_HIGH) {
axisActive[1] = true;
GB_set_key_state(_gb, GB_KEY_DOWN, false);
GB_set_key_state(_gb, GB_KEY_UP, true);
}
else if (axisActive[1] && value < JOYSTICK_LOW && value > -JOYSTICK_LOW) {
axisActive[1] = false;
GB_set_key_state(_gb, GB_KEY_DOWN, false);
GB_set_key_state(_gb, GB_KEY_UP, false);
}
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}
}
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- (BOOL)acceptsFirstResponder
{
return YES;
}
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- (void)mouseEntered:(NSEvent *)theEvent
{
if (!mouse_hidden) {
mouse_hidden = true;
if (_mouseHidingEnabled) {
[NSCursor hide];
}
}
[super mouseEntered:theEvent];
}
- (void)mouseExited:(NSEvent *)theEvent
{
if (mouse_hidden) {
mouse_hidden = false;
if (_mouseHidingEnabled) {
[NSCursor unhide];
}
}
[super mouseExited:theEvent];
}
- (void)setMouseHidingEnabled:(BOOL)mouseHidingEnabled
{
if (mouseHidingEnabled == _mouseHidingEnabled) return;
_mouseHidingEnabled = mouseHidingEnabled;
if (mouse_hidden && _mouseHidingEnabled) {
[NSCursor hide];
}
if (mouse_hidden && !_mouseHidingEnabled) {
[NSCursor unhide];
}
}
- (BOOL)isMouseHidingEnabled
{
return _mouseHidingEnabled;
}
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- (void) flagsChanged:(NSEvent *)event
{
if (event.modifierFlags > previousModifiers) {
[self keyDown:event];
}
else {
[self keyUp:event];
}
previousModifiers = event.modifierFlags;
}
- (uint32_t *)currentBuffer
{
return image_buffers[current_buffer];
}
- (uint32_t *)previousBuffer
{
return image_buffers[(current_buffer + 2) % self.numberOfBuffers];
}
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@end