50 lines
1.6 KiB
Swift
50 lines
1.6 KiB
Swift
//
|
|
// LoresMode.swift
|
|
// FruitMachine
|
|
//
|
|
// Created by Christopher Rohl on 8/2/17.
|
|
// Copyright © 2017 Christopher Rohl. All rights reserved.
|
|
//
|
|
|
|
import Cocoa
|
|
|
|
extension AppleIIBase {
|
|
|
|
class LoresMode: NSObject {
|
|
static func putLoresPixel(buffer: UnsafeMutablePointer<BitmapPixelsLE555.PixelData>?, pixel: UInt8, address: UInt16) {
|
|
|
|
let pageOffset = address - 0x400
|
|
let pixelPosition = VideoHelpers.getPixelOffset(memoryOffset: Int(pageOffset))
|
|
if(pixelPosition.x == -1 && pixelPosition.y == -1) {
|
|
return
|
|
}
|
|
|
|
let pixelNybbleHi = pixel & 0x0F
|
|
let pixelNybbleLo = (pixel & 0xF0) >> 4
|
|
|
|
let colorHi = AppleII.LoresColors.getColor(index: pixelNybbleHi)
|
|
let colorLo = LoresColors.getColor(index: pixelNybbleLo)
|
|
|
|
//One lores pixel is 7px wide and 4px tall for a resolution of 40x48.
|
|
let baseOffset = EmulatedSystemInstance!.emulatorViewDelegate.scanlineOffsets[Int(pixelPosition.y)] + Int(pixelPosition.x)
|
|
|
|
for charY in 0..<5 {
|
|
let offsetHi = baseOffset + (AppleII.ScreenDelegate.PIXEL_WIDTH * charY)
|
|
|
|
for charX in 0..<7 {
|
|
buffer![offsetHi + 6 - charX] = colorHi
|
|
}
|
|
}
|
|
for charY in 4..<8 {
|
|
let offsetLo = baseOffset + (AppleII.ScreenDelegate.PIXEL_WIDTH * charY)
|
|
|
|
for charX in 0..<7 {
|
|
buffer![offsetLo + 6 - charX] = colorLo
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
}
|