77 lines
1.9 KiB
Kotlin
77 lines
1.9 KiB
Kotlin
package android.emu6502
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.Paint
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import android.util.AttributeSet
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import android.view.View
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open class Display(context: Context, attrs: AttributeSet) : View(context, attrs) {
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private val numX = 32
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private val numY = 32
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private val matrix = Array(32, { IntArray(32) })
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private val palette = arrayOf(
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"#000000", "#ffffff", "#880000", "#aaffee",
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"#cc44cc", "#00cc55", "#0000aa", "#eeee77",
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"#dd8855", "#664400", "#ff7777", "#333333",
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"#777777", "#aaff66", "#0088ff", "#bbbbbb")
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private val paint: Paint = Paint()
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private val bgPaint: Paint = Paint()
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private var listener: Callbacks? = null
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fun setOnDisplayCallback(callback: Callbacks) {
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listener = callback
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}
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open fun updatePixel(addr: Int, value: Int) {
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val offsetAddr = addr - 0x200
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val x = offsetAddr % 32
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val y = Math.floor((offsetAddr / 32).toDouble()).toInt()
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val color = palette[value]
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matrix[x][y] = Color.parseColor(color)
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postInvalidate()
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listener?.onUpdate()
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}
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override fun onDraw(canvas: Canvas) {
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val pixelSizeX = width / numX
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val pixelSizeY = height / numX
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matrix.forEachIndexed { i, _ ->
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matrix[i].forEachIndexed { j, _ ->
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val color = matrix[i][j]
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val right = (i * pixelSizeX).toFloat()
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val top = (j * pixelSizeY).toFloat()
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if (color != 0) {
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paint.color = color
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canvas.drawRect(right, top, right + pixelSizeX, top + pixelSizeY, paint)
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} else {
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canvas.drawRect(right, top, right + pixelSizeX, top + pixelSizeY, bgPaint)
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}
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}
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}
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listener?.onDraw()
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}
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interface Callbacks {
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fun onUpdate()
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fun onDraw()
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}
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fun reset() {
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matrix.forEachIndexed { i, _ ->
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matrix[i].forEachIndexed { j, _ ->
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matrix[i][j] = 0
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}
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}
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postInvalidate()
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}
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init {
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bgPaint.color = Color.BLACK
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}
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}
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