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https://github.com/fadden/6502bench.git
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e82678126f
Added comments, renamed files, removed cruft. Stop showing the visualization tag name in the code list. It's often redundant with the code label, and it's distracting. (We may want to make this an option so you can Ctrl+F to find a tag.)
228 lines
8.7 KiB
C#
228 lines
8.7 KiB
C#
/*
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* Copyright 2019 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.ObjectModel;
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using PluginCommon;
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namespace RuntimeData.Atari {
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public class Vis2600 : MarshalByRefObject, IPlugin, IPlugin_Visualizer {
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// IPlugin
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public string Identifier {
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get { return "Atari 2600 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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// Visualization identifiers; DO NOT change or projects that use them will break.
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private const string VIS_GEN_SPRITE = "atari2600-sprite";
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private const string VIS_GEN_PLAYFIELD = "atari2600-playfield";
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private const string P_OFFSET = "offset";
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private const string P_HEIGHT = "height";
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private const string P_ROW_THICKNESS = "rowThickness";
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private const string P_REFLECTED = "reflected";
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private const int MAX_HEIGHT = 192;
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private const int HALF_WIDTH = 20;
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// Visualization descriptors.
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private VisDescr[] mDescriptors = new VisDescr[] {
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new VisDescr(VIS_GEN_SPRITE, "Atari 2600 Sprite", 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("Height",
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P_HEIGHT, typeof(int), 1, 192, 0, 1),
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}),
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new VisDescr(VIS_GEN_PLAYFIELD, "Atari 2600 Playfield", 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("Height",
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P_HEIGHT, typeof(int), 1, 192, 0, 1),
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new VisParamDescr("Row thickness",
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P_ROW_THICKNESS, typeof(int), 1, 20, 0, 4),
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new VisParamDescr("Reflected",
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P_REFLECTED, 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_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_GEN_SPRITE:
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return GenerateSprite(parms);
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case VIS_GEN_PLAYFIELD:
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return GeneratePlayfield(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 GenerateSprite(ReadOnlyDictionary<string, object> parms) {
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int offset = Util.GetFromObjDict(parms, P_OFFSET, 0);
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int height = Util.GetFromObjDict(parms, P_HEIGHT, 1);
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if (offset < 0 || offset >= mFileData.Length ||
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height <= 0 || height > MAX_HEIGHT) {
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// the UI should flag these based on range (and ideally wouldn't have called us)
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mAppRef.ReportError("Invalid parameter");
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return null;
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}
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int lastOffset = offset + height - 1;
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if (lastOffset >= mFileData.Length) {
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mAppRef.ReportError("Sprite runs off end of file (last offset +" +
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lastOffset.ToString("x6") + ")");
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return null;
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}
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VisBitmap8 vb = new VisBitmap8(8, height);
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SetPalette(vb);
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for (int row = 0; row < height; row++) {
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byte val = mFileData[offset + row];
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for (int col = 0; col < 8; col++) {
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if ((val & 0x80) != 0) {
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vb.SetPixelIndex(col, row, (byte)Color.White);
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} else {
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vb.SetPixelIndex(col, row, (byte)Color.Black);
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}
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val <<= 1;
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}
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}
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return vb;
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}
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private IVisualization2d GeneratePlayfield(ReadOnlyDictionary<string, object> parms) {
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const int BYTE_WIDTH = 3;
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int offset = Util.GetFromObjDict(parms, P_OFFSET, 0);
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int height = Util.GetFromObjDict(parms, P_HEIGHT, 1);
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int rowThick = Util.GetFromObjDict(parms, P_ROW_THICKNESS, 4);
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bool isReflected = Util.GetFromObjDict(parms, P_REFLECTED, false);
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if (offset < 0 || offset >= mFileData.Length ||
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height <= 0 || height > MAX_HEIGHT ||
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rowThick <= 0 || rowThick > MAX_HEIGHT) {
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// the UI should flag these based on range (and ideally wouldn't have called us)
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mAppRef.ReportError("Invalid parameter");
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return null;
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}
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int lastOffset = offset + BYTE_WIDTH * height - 1;
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if (lastOffset >= mFileData.Length) {
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mAppRef.ReportError("Playfield runs off end of file (last offset +" +
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lastOffset.ToString("x6") + ")");
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return null;
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}
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// Each half of the playfield is 20 bits wide.
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VisBitmap8 vb = new VisBitmap8(40, height * rowThick);
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SetPalette(vb);
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for (int row = 0; row < height; row++) {
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// Assume data is stored as PF0,PF1,PF2. PF0/PF2 are in reverse order, so
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// start by assembling them as a reversed 20-bit word.
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int srcOff = offset + row * BYTE_WIDTH;
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int rev = (mFileData[srcOff] >> 4) | (RevBits(mFileData[srcOff + 1], 8) << 4) |
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(mFileData[srcOff + 2] << 12);
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// Now generate the forward order.
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int fwd = RevBits(rev, 20);
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// Render the first part of the line forward.
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RenderHalfField(vb, row * rowThick, rowThick, 0,
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fwd, Color.White);
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// Render the second half forward or reversed, in grey.
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RenderHalfField(vb, row * rowThick, rowThick, HALF_WIDTH,
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isReflected ? rev : fwd, Color.Grey);
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}
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return vb;
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}
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private int RevBits(int val, int count) {
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int result = 0;
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for (int i = 0; i < count; i++) {
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result <<= 1;
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result |= val & 0x01;
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val >>= 1;
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}
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return result;
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}
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private void RenderHalfField(VisBitmap8 vb, int row, int rowDup, int startCol, int val,
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Color setColor) {
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for (int col = startCol; col < startCol + HALF_WIDTH; col++) {
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val <<= 1;
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byte colorIdx;
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if ((val & (1 << HALF_WIDTH)) != 0) {
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colorIdx = (byte)setColor;
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} else {
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colorIdx = (byte)Color.Black;
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}
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for (int r = row; r < row + rowDup; r++) {
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vb.SetPixelIndex(col, r, colorIdx);
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}
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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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Grey = 3
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}
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private void SetPalette(VisBitmap8 vb) {
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vb.AddColor(0, 0, 0, 0); // 0=transparent
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vb.AddColor(0xff, 0x00, 0x00, 0x00); // 1=black
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vb.AddColor(0xff, 0xff, 0xff, 0xff); // 2=white
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vb.AddColor(0xff, 0xd0, 0xd0, 0xd0); // 3=grey
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}
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}
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}
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