105 lines
3.6 KiB
C#
105 lines
3.6 KiB
C#
using System;
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using BizHawk.Common;
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namespace BizHawk.Emulation.Cores.Consoles.Vectrex
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{
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public class PPU
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{
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public VectrexHawk Core { get; set; }
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public bool zero_sig, ramp_sig, blank_sig, off_screen;
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public byte vec_scale, x_vel, y_vel, bright;
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public double x_pos, y_pos;
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public int skip;
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public uint bright_int_1, bright_int_2, bright_int_3;
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public static uint br = 0xFFFFFFFF;
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public void tick()
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{
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//Console.WriteLine(ramp_sig + " " + zero_sig + " " + blank_sig + " " + Core.cpu.TotalExecutedCycles + " " + (x_vel - 128.0) + " " + x_pos
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//+ " " + (y_vel - 128.0) + " " + y_pos + " " + Core.t1_counter + " " + vec_scale);
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if (ramp_sig && !zero_sig)
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{
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if (skip == 0)
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{
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x_pos = x_pos + (x_vel - 128.0) / 256.0 * (vec_scale + 2);
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y_pos = y_pos - (y_vel - 128.0) / 256.0 * (vec_scale + 2);
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}
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else
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{
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skip--;
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}
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off_screen = false;
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if (x_pos > 257) { off_screen = true; if (x_pos > (257 + 256)) { x_pos = (257 + 256); } }
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if (x_pos < 2) { off_screen = true; if (x_pos < (2 - 256)) { x_pos = (2 - 256); } }
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if (y_pos > 385) { off_screen = true; if (y_pos > (385 + 256)) { y_pos = (385 + 256); } }
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if (y_pos < 2) { off_screen = true; if (y_pos < (2 - 256)) { y_pos = (2 - 256); } }
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}
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else if (zero_sig)
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{
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x_pos = 128 + 2;
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y_pos = 192 + 2;
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}
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if (!blank_sig && !off_screen)
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{
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Core._vidbuffer[(int)(Math.Round(x_pos) + 260 * Math.Round(y_pos))] |= (int)(br & bright_int_1);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 1 + 260 * Math.Round(y_pos))] |= (int)(br & bright_int_2);
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Core._vidbuffer[(int)(Math.Round(x_pos) - 1 + 260 * Math.Round(y_pos))] |= (int)(br & bright_int_2);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 260 * (Math.Round(y_pos) + 1))] |= (int)(br & bright_int_2);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 260 * (Math.Round(y_pos) - 1))] |= (int)(br & bright_int_2);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 2 + 260 * Math.Round(y_pos))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) - 2 + 260 * Math.Round(y_pos))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 260 * (Math.Round(y_pos) + 2))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 260 * (Math.Round(y_pos) - 2))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 1 + 260 * (Math.Round(y_pos) + 1))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) + 1 + 260 * (Math.Round(y_pos) - 1))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) - 1 + 260 * (Math.Round(y_pos) + 1))] |= (int)(br & bright_int_3);
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Core._vidbuffer[(int)(Math.Round(x_pos) - 1 + 260 * (Math.Round(y_pos) - 1))] |= (int)(br & bright_int_3);
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}
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}
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public void Reset()
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{
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zero_sig = true;
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blank_sig = true;
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ramp_sig = false;
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vec_scale = x_vel = y_vel = bright = 0;
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x_pos = 128 + 2;
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y_pos = 192 + 2;
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}
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public void SyncState(Serializer ser)
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{
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ser.Sync(nameof(zero_sig), ref zero_sig);
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ser.Sync(nameof(blank_sig), ref blank_sig);
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ser.Sync(nameof(ramp_sig), ref ramp_sig);
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ser.Sync(nameof(off_screen), ref off_screen);
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ser.Sync(nameof(vec_scale), ref vec_scale);
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ser.Sync(nameof(x_vel), ref x_vel);
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ser.Sync(nameof(y_vel), ref y_vel);
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ser.Sync(nameof(bright), ref bright);
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ser.Sync(nameof(x_pos), ref x_pos);
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ser.Sync(nameof(y_pos), ref y_pos);
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ser.Sync(nameof(skip), ref skip);
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ser.Sync(nameof(bright_int_1), ref bright_int_1);
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ser.Sync(nameof(bright_int_2), ref bright_int_2);
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ser.Sync(nameof(bright_int_3), ref bright_int_3);
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}
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}
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}
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