mirror of
https://github.com/fadden/6502bench.git
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308 lines
13 KiB
C#
308 lines
13 KiB
C#
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/*
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* Copyright 2020 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using PluginCommon;
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namespace RuntimeData.Nintendo {
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/// <summary>
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/// Visualization generators for Nintendo Entertainment System graphics.
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///
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/// The full PPU pattern table grid is pretty straightforward. The way the tiles are
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/// combined into sprites and background is not. This presents a "tile grid" that
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/// shows a simple MxN grid of tiles in row-major order, but reality seems to be
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/// more complex than that and may be game-specific.
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///
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/// To simplify things, the CHR ROM section must be labeled "CHR_ROM", and should have
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/// a unique address.
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/// </summary>
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public class VisNES : MarshalByRefObject, IPlugin, IPlugin_SymbolList, IPlugin_Visualizer {
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// IPlugin
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public string Identifier {
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get { return "Nintendo Entertainment System Graphic Visualizer"; }
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}
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private IApplication mAppRef;
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private byte[] mFileData;
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private AddressTranslate mAddrTrans;
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private const string CHR_ROM = "CHR_ROM";
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private int mChrRomOffset = -1;
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// Visualization identifiers; DO NOT change or projects that use them will break.
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private const string VIS_CHR_ROM = "nes-chr-rom";
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private const string VIS_TILE_GRID = "nes-tile-grid";
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private const string P_OFFSET = "offset";
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private const string P_WIDTH = "width";
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private const string P_HEIGHT = "height";
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private const string P_COLOR_PALETTE = "colorPalette";
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private const string P_SHOW_LABELS = "showLabels";
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private const string P_FLIP_RIGHT = "flipRight";
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private const string P_RIGHT_TABLE = "useRightTable";
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private const int TileWidth = 8;
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private const int TileHeight = 8;
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private const int BytesPerTile = 16;
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// Visualization descriptors.
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private VisDescr[] mDescriptors = new VisDescr[] {
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new VisDescr(VIS_CHR_ROM, "NES CHR ROM Pattern Tables", VisDescr.VisType.Bitmap,
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new VisParamDescr[] {
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//new VisParamDescr("File offset (hex)",
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// P_OFFSET, typeof(int), 0, 0x00ffffff, VisParamDescr.SpecialMode.Offset, 0),
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// TODO: either make this an enum, or just provide 4 slots that take a color
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// (add a SpecialMode.Color and accept six-digit #123456 inputs;
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// no need to restrict to NES limitations)
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new VisParamDescr("Color palette",
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P_COLOR_PALETTE, typeof(int), 0, 2, 0, 0),
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new VisParamDescr("Show labels",
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P_SHOW_LABELS, typeof(bool), 0, 0, 0, true),
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}),
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new VisDescr(VIS_TILE_GRID, "NES Tile Grid", VisDescr.VisType.Bitmap,
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new VisParamDescr[] {
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new VisParamDescr("File offset (hex)",
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P_OFFSET, typeof(int), 0, 0x00ffffff, VisParamDescr.SpecialMode.Offset, 0),
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new VisParamDescr("Color palette",
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P_COLOR_PALETTE, typeof(int), 0, 2, 0, 0),
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new VisParamDescr("Width (in tiles)",
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P_WIDTH, typeof(int), 1, 256, 0, 1),
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new VisParamDescr("Height (in tiles)",
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P_HEIGHT, typeof(int), 1, 256, 0, 1),
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// Flips the pixels of the tiles on the right side. This handles a common
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// case, but in practice a sprite can be an arbitrary mix of flipped and
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// normal tiles.
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new VisParamDescr("Horiz-flip right side",
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P_FLIP_RIGHT, typeof(bool), 0, 0, 0, false),
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new VisParamDescr("Use right table",
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P_RIGHT_TABLE, typeof(bool), 0, 0, 0, false),
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}),
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};
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// IPlugin
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public void Prepare(IApplication appRef, byte[] fileData, AddressTranslate addrTrans) {
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mAppRef = appRef;
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mFileData = fileData;
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mAddrTrans = addrTrans;
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}
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// IPlugin
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public void Unprepare() {
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mAppRef = null;
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mFileData = null;
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mAddrTrans = null;
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}
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// IPlugin_SymbolList
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public void UpdateSymbolList(List<PlSymbol> plSyms) {
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// reset this every time, in case they remove the symbol
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mChrRomOffset = -1;
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foreach (PlSymbol sym in plSyms) {
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if (sym.Label == CHR_ROM) {
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int addr = sym.Value;
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mChrRomOffset = mAddrTrans.AddressToOffset(0, addr);
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break;
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}
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}
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mAppRef.DebugLog(CHR_ROM + " @ +" + mChrRomOffset.ToString("x6"));
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}
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// IPlugin_SymbolList
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public bool IsLabelSignificant(string beforeLabel, string afterLabel) {
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return beforeLabel == CHR_ROM || afterLabel == CHR_ROM;
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}
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// IPlugin_Visualizer
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public VisDescr[] GetVisGenDescrs() {
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// We're using a static set, but it could be generated based on file contents.
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// Confirm that we're prepared.
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if (mFileData == null) {
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return null;
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}
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return mDescriptors;
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}
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// IPlugin_Visualizer
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public IVisualization2d Generate2d(VisDescr descr,
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ReadOnlyDictionary<string, object> parms) {
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switch (descr.Ident) {
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case VIS_CHR_ROM:
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return GenerateRomChart(parms);
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case VIS_TILE_GRID:
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return GenerateTileGrid(parms);
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default:
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mAppRef.ReportError("Unknown ident " + descr.Ident);
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return null;
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}
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}
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private IVisualization2d GenerateRomChart(ReadOnlyDictionary<string, object> parms) {
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int paletteNum = Util.GetFromObjDict(parms, P_COLOR_PALETTE, 0);
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bool showLabels = Util.GetFromObjDict(parms, P_SHOW_LABELS, true);
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if (mChrRomOffset < 0) {
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mAppRef.ReportError("CHR_ROM symbol not found");
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return null;
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}
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if (mChrRomOffset + 8192 > mFileData.Length) {
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mAppRef.ReportError("8KB CHR ROM runs off end of file");
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return null;
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}
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const int spacing = 1;
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const int tWidth = TileWidth + spacing;
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const int tHeight = TileHeight + spacing;
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const int gap = 4 + spacing * 2;
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int labelSpacing = showLabels ? 9 : 0;
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VisBitmap8 vb = new VisBitmap8(tWidth * 16 * 2 + gap + labelSpacing * 2 + 1,
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tHeight * 16 + labelSpacing + 1);
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SetPalette(vb, (Palette)paletteNum);
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if (showLabels) {
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for (int i = 0; i < 16; i++) {
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char ch = (i < 10) ? (char)('0' + i) : (char)('A' + i - 10);
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VisBitmap8.DrawChar(vb, ch, (i + 1) * tWidth + 1, 1,
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(byte)Color.Black, (byte)Color.White);
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VisBitmap8.DrawChar(vb, ch, (i + 16 + 1) * tWidth + gap + 1, 1,
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(byte)Color.Black, (byte)Color.White);
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VisBitmap8.DrawChar(vb, ch, 1, (i + 1) * tHeight + 1,
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(byte)Color.Black, (byte)Color.White);
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VisBitmap8.DrawChar(vb, ch, (1 + 16 + 16) * tWidth + gap + 1,
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(i + 1) * tHeight + 1, (byte)Color.Black, (byte)Color.White);
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}
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}
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for (int idx = 0; idx < 512; idx++) {
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int xshift = idx < 256 ? 0 : tWidth * 16 + gap;
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int xc = (idx & 0x0f) * tWidth + xshift + labelSpacing + 1;
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int yc = ((idx & 0xff) >> 4) * tHeight + labelSpacing + 1;
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RenderTile(idx, vb, xc, yc, false);
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}
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return vb;
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}
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private IVisualization2d GenerateTileGrid(ReadOnlyDictionary<string, object> parms) {
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int offset = Util.GetFromObjDict(parms, P_OFFSET, 0);
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int paletteNum = Util.GetFromObjDict(parms, P_COLOR_PALETTE, 0);
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int width = Util.GetFromObjDict(parms, P_WIDTH, 1);
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int height = Util.GetFromObjDict(parms, P_HEIGHT, 1);
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bool flipRight = Util.GetFromObjDict(parms, P_FLIP_RIGHT, false);
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bool useRightTable = Util.GetFromObjDict(parms, P_RIGHT_TABLE, false);
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if (mChrRomOffset < 0) {
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mAppRef.ReportError("CHR_ROM symbol not found");
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return null;
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}
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if (offset < 0 || offset >= mFileData.Length) {
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mAppRef.ReportError("Invalid parameter");
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return null;
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}
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if (offset + width * height > mFileData.Length) {
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mAppRef.ReportError("Data runs off end of file");
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return null;
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}
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VisBitmap8 vb = new VisBitmap8(TileWidth * width, TileHeight * height);
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SetPalette(vb, (Palette)paletteNum);
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for (int row = 0; row < height; row++) {
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for (int col = 0; col < width; col++) {
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int tileNum = mFileData[offset + row * width + col] +
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(useRightTable ? 256 : 0);
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RenderTile(tileNum, vb, TileWidth * col, TileHeight * row,
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flipRight && col >= (width + 1) / 2);
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}
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}
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return vb;
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}
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/// <summary>
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/// Renders a tile from the PPU pattern table.
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/// </summary>
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/// <param name="tileNum">Tile number (0-511).</param>
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/// <param name="vb">Bitmap to render to.</param>
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/// <param name="xc">X coordinate for upper-left coordinate.</param>
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/// <param name="yc">Y coordinate for upper-left coordinate.</param>
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/// <param name="flipHoriz">Flip pixels horizontally</param>
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private void RenderTile(int tileNum, VisBitmap8 vb, int xc, int yc, bool flipHoriz) {
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int tileOff = mChrRomOffset + tileNum * BytesPerTile;
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for (int row = 0; row < 8; row++) {
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byte part0 = mFileData[tileOff];
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byte part1 = mFileData[tileOff + 8];
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for (int bit = 7; bit >= 0; bit--) {
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int val = ((part0 >> bit) & 0x01) | (((part1 >> bit) & 0x01) << 1);
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vb.SetPixelIndex(xc + (flipHoriz ? bit : 7 - bit), yc,
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(byte)((byte)Color.Color0 + val));
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}
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tileOff++;
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yc++;
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}
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}
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private enum Color : byte {
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Transparent = 0,
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Black = 1,
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White = 2,
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Color0 = 3,
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Color1 = 4,
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Color2 = 5,
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Color3 = 6
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}
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private enum Palette : int {
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Greyscale = 0,
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Pinkish = 1,
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Greenish = 2,
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}
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private void SetPalette(VisBitmap8 vb, Palette pal) {
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vb.AddColor(0, 0, 0, 0); // 0=transparent
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vb.AddColor(0xff, 0x01, 0x01, 0x01); // 1=near black (so VB doesn't uniquify)
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vb.AddColor(0xff, 0xfe, 0xfe, 0xfe); // 2=near white
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switch (pal) {
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case Palette.Greyscale:
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default:
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vb.AddColor(0xff, 0x00, 0x00, 0x00); // black
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vb.AddColor(0xff, 0x80, 0x80, 0x80); // dark grey
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vb.AddColor(0xff, 0xb0, 0xb0, 0xb0); // medium grey
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vb.AddColor(0xff, 0xe0, 0xe0, 0xe0); // light grey
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break;
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case Palette.Pinkish:
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vb.AddColor(0xff, 0x49, 0x99, 0xfe); // sky blue
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vb.AddColor(0xff, 0xff, 0xbd, 0xaf); // pinkish
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vb.AddColor(0xff, 0xcd, 0x50, 0x00); // dark orange
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vb.AddColor(0xff, 0x00, 0x00, 0x00); // black
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break;
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case Palette.Greenish:
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vb.AddColor(0xff, 0x49, 0x99, 0xfe); // sky blue
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vb.AddColor(0xff, 0x00, 0xa4, 0x00); // medium green
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vb.AddColor(0xff, 0xfc, 0xfc, 0xfc); // near white
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vb.AddColor(0xff, 0xff, 0x99, 0x2b); // orange
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break;
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}
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}
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}
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}
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