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#import "GBVisualizerView.h"
#import "GBPaletteEditorController.h"
#import <Core/gb.h>
#define SAMPLE_COUNT 1024
static NSColor *color_to_effect_color(typeof(GB_PALETTE_DMG.colors[0]) color)
{
if (@available(macOS 10.10, *)) {
double tint = MAX(color.r, MAX(color.g, color.b)) + 64;
return [NSColor colorWithRed:color.r / tint
green:color.g / tint
blue:color.b / tint
alpha:tint/(255 + 64)];
}
return [NSColor colorWithRed:color.r / 255.0
green:color.g / 255.0
blue:color.b / 255.0
alpha:1.0];
}
@implementation GBVisualizerView
{
GB_sample_t _samples[SAMPLE_COUNT];
size_t _position;
}
- (void)drawRect:(NSRect)dirtyRect
{
const GB_palette_t *palette = [GBPaletteEditorController userPalette];
NSSize size = self.bounds.size;
[color_to_effect_color(palette->colors[0]) setFill];
NSRectFill(self.bounds);
NSBezierPath *line = [NSBezierPath bezierPath];
[line moveToPoint:NSMakePoint(0, size.height / 2)];
for (unsigned i = 0; i < SAMPLE_COUNT; i++) {
GB_sample_t *sample = _samples + ((i + _position) % SAMPLE_COUNT);
double volume = ((signed)sample->left + (signed)sample->right) / 32768.0;
[line lineToPoint:NSMakePoint(size.width * (i + 0.5) / SAMPLE_COUNT,
(volume + 1) * size.height / 2)];
}
[line lineToPoint:NSMakePoint(size.width, size.height / 2)];
[line setLineWidth:1.0];
[color_to_effect_color(palette->colors[2]) setFill];
[line fill];
[color_to_effect_color(palette->colors[1]) setFill];
NSRectFill(NSMakeRect(0, size.height / 2 - 0.5, size.width, 1));
[color_to_effect_color(palette->colors[3]) setStroke];
[line stroke];
[super drawRect:dirtyRect];
}
- (void)addSample:(GB_sample_t *)sample
{
_samples[_position++] = *sample;
if (_position == SAMPLE_COUNT) {
_position = 0;
}
}
@end
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