120 lines
3.2 KiB
C#
120 lines
3.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Mesen.GUI.Debugger.PpuViewer
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{
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public class SpriteInfo
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{
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public int Index;
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public int X;
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public int Y;
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public int Width;
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public int Height;
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public int TileIndex;
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public int Palette;
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public int Priority;
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public int Flags;
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public bool LargeSprite;
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public bool HorizontalMirror;
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public bool VerticalMirror;
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public bool UseSecondTable;
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private bool GameboyMode;
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public Rectangle GetBounds()
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{
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return new Rectangle(X, Y, Width, Height);
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}
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public bool IsVisible()
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{
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if(GameboyMode) {
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return !(X == 0 || X >= 168 || Y+Height <= 16 || Y >= 160);
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}
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if(X + Width <= 0 || X > 255) {
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return false;
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}
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int endY = (Y + Height) & 0xFF;
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if(Y > 239 && endY > Y) {
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return false;
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}
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return true;
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}
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public static SpriteInfo GetGbSpriteInfo(byte[] oamRam, int spriteIndex, bool largeSprite, bool cgbEnabled)
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{
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SpriteInfo sprite = new SpriteInfo();
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int addr = spriteIndex << 2;
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sprite.Index = spriteIndex;
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sprite.Y = oamRam[addr];
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sprite.LargeSprite = largeSprite;
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sprite.Height = largeSprite ? 16 : 8;
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sprite.Width = 8;
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sprite.X = oamRam[addr + 1];
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sprite.TileIndex = oamRam[addr + 2];
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byte attributes = oamRam[addr + 3];
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sprite.Flags = attributes;
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sprite.UseSecondTable = cgbEnabled ? ((attributes & 0x08) != 0) : false;
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sprite.Palette = cgbEnabled ? (attributes & 0x07) : ((attributes & 0x10) >> 4);
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sprite.Priority = (attributes & 0x80) != 0 ? 1 : 0;
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sprite.HorizontalMirror = (attributes & 0x20) != 0;
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sprite.VerticalMirror = (attributes & 0x40) != 0;
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sprite.GameboyMode = true;
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return sprite;
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}
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public static SpriteInfo GetSpriteInfo(byte[] oamRam, int oamMode, int spriteIndex)
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{
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SpriteInfo sprite = new SpriteInfo();
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int addr = spriteIndex << 2;
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sprite.Index = spriteIndex;
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sprite.Y = oamRam[addr + 1];
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int highTableOffset = addr >> 4;
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int shift = ((addr >> 2) & 0x03) << 1;
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byte highTableValue = (byte)(oamRam[0x200 | highTableOffset] >> shift);
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sprite.LargeSprite = ((highTableValue & 0x02) >> 1) != 0;
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sprite.Height = _oamSizes[oamMode, sprite.LargeSprite ? 1 : 0, 1] << 3;
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sprite.Width = _oamSizes[oamMode, sprite.LargeSprite ? 1 : 0, 0] << 3;
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int sign = (highTableValue & 0x01) << 8;
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sprite.X = ((sign | oamRam[addr]) << 23) >> 23;
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sprite.TileIndex = oamRam[addr + 2];
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byte flags = oamRam[addr + 3];
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sprite.Flags = flags;
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sprite.UseSecondTable = (flags & 0x01) != 0;
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sprite.Palette = (flags >> 1) & 0x07;
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sprite.Priority = (flags >> 4) & 0x03;
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sprite.HorizontalMirror = (flags & 0x40) != 0;
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sprite.VerticalMirror = (flags & 0x80) != 0;
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return sprite;
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}
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private static byte[,,] _oamSizes = new byte[8, 2, 2] {
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{ { 1, 1 }, { 2, 2 } }, //8x8 + 16x16
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{ { 1, 1 }, { 4, 4 } }, //8x8 + 32x32
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{ { 1, 1 }, { 8, 8 } }, //8x8 + 64x64
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{ { 2, 2 }, { 4, 4 } }, //16x16 + 32x32
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{ { 2, 2 }, { 8, 8 } }, //16x16 + 64x64
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{ { 4, 4 }, { 8, 8 } }, //32x32 + 64x64
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{ { 2, 4 }, { 4, 8 } }, //16x32 + 32x64
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{ { 2, 4 }, { 4, 4 } } //16x32 + 32x32
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};
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}
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}
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