gpu 'draw call bytecode' implementation WIP

tsvm_core/src/net/torvald/tsvm/peripheral/DrawCall.kt

@@ -0,0 +1,98 @@
+package net.torvald.tsvm.peripheral
+
+/**
+ * VLIW-style of Draw Call bytecodes
+ *
+ * Created by minjaesong on 2022-11-29.
+ */
+internal interface DrawCall {
+    fun execute(gpu: GraphicsAdapter)
+}
+
+internal class DrawCallCompound(val call1: DrawCall, val call2: DrawCall, val call3: DrawCall) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        call1.execute(gpu)
+        call2.execute(gpu)
+        call3.execute(gpu)
+    }
+}
+
+internal object DrawCallNop : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {}
+}
+
+internal object DrawCallEnd : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {}
+}
+
+internal class GotoScanline(val line: Int) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        gpu.drawCallRscanline = line
+    }
+}
+
+internal class JumpIfScanline(
+    val compare: Int,
+    val whenLessThan: Int,
+    val whenEqualTo: Int,
+    val whenGreaterThan: Int
+) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        if (gpu.drawCallRscanline < compare) {
+            if (whenLessThan != 65535) gpu.drawCallRscanline = whenLessThan - 1
+        }
+        else if (gpu.drawCallRscanline == compare) {
+            if (whenEqualTo != 65535) gpu.drawCallRscanline = whenEqualTo - 1
+        }
+        else {
+            if (whenGreaterThan != 65535) gpu.drawCallRscanline = whenGreaterThan - 1
+        }
+    }
+}
+
+internal class DrawCallDrawLines(
+    val opCount: Int, val colour: Int,
+    val xposLen1: Int,
+    val xposLen2: Int = 0,
+    val xposLen3: Int = 0,
+    val xposLen4: Int = 0,
+    val xposLen5: Int = 0,
+    val xposLen6: Int = 0,
+    val xposLen7: Int = 0,
+    val xposLen8: Int = 0
+) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        TODO("Not yet implemented")
+    }
+}
+
+internal class DrawCallDrawDoubleLines(
+    val opCount: Int, val colour: Int,
+    val xposLen1: Int,
+    val xposLen2: Int = 0,
+    val xposLen3: Int = 0,
+    val xposLen4: Int = 0,
+    val xposLen5: Int = 0,
+    val xposLen6: Int = 0,
+    val xposLen7: Int = 0,
+    val xposLen8: Int = 0
+) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        TODO("Not yet implemented")
+    }
+}
+
+internal class DrawCallCopyPixels(
+    val opCount: Int,
+    val xPos: Int,
+    val lineLength: Int,
+    val stride1: Int,
+    val stride2: Int = 0,
+    val stride3: Int = 0,
+    val stride4: Int = 0,
+    val stride5: Int = 0,
+) : DrawCall {
+    override fun execute(gpu: GraphicsAdapter) {
+        TODO("Not yet implemented")
+    }
+}

tsvm_core/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt

@@ -123,6 +123,8 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
 
 //    override var halfrowMode = false
 
+    private val instArea = UnsafeHelper.allocate(65536L)
+
     override var rawCursorPos: Int
         get() = textArea.getShortFree(memTextCursorPosOffset).toInt()
         set(value) { textArea.setShortFree(memTextCursorPosOffset, value.toShort()) }
@@ -287,6 +289,8 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
 
             in 1024L..2047L -> scanlineOffsets[addr - 1024]
 
+            in 65536L..131071L -> instArea[addr - 65536]
+
             in 0 until VM.MMIO_SIZE -> -1
             else -> null
         }
@@ -308,6 +312,8 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
 
             in 1024L..2047L -> { scanlineOffsets[addr - 1024] = byte }
 
+            in 65536L..131071L -> instArea[addr - 65536] = byte
+
             else -> null
         }
     }
@@ -345,6 +351,11 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
         }
     }
 
+    private var drawCallSize = 0
+    private val drawCallBuffer = Array<DrawCall>(3640) { DrawCallEnd }
+    internal var drawCallProgramCounter = 0
+    internal var drawCallRscanline = 0
+
     /**
      * @param mode 0-Low, 1-High
      */
@@ -744,6 +755,7 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
         chrrom.dispose()
         unusedArea.destroy()
         scanlineOffsets.destroy()
+        instArea.destroy()
     }
 
     private var textCursorBlinkTimer = 0f