mirror of
https://github.com/fadden/6502bench.git
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676ab2554d
Should be solid/transparent not white/black. Added a blue color to the palette to use for sprites, as white + transparent disappears completely on web pages with a white background. Black + white + grey seems fine for playfields.
230 lines
8.8 KiB
C#
230 lines
8.8 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.Solid);
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} else {
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vb.SetPixelIndex(col, row, (byte)Color.Transparent);
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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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Solid = 1,
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Black = 2,
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White = 3,
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Grey = 4
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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, 0x20, 0x20, 0xe0); // 1=solid (mostly blue)
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vb.AddColor(0xff, 0x00, 0x00, 0x00); // 2=black
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vb.AddColor(0xff, 0xff, 0xff, 0xff); // 3=white
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vb.AddColor(0xff, 0xd0, 0xd0, 0xd0); // 4=grey
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}
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}
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}
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