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Defined a simple monochrome bitmap format, and created some pieces for a Tic-Tac-Toe game. Wrote a tutorial that explains how to visualize them. Also, updated some comments.
156 lines
5.6 KiB
C#
156 lines
5.6 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 Tutorial {
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public class VisTutorial5 : MarshalByRefObject, IPlugin, IPlugin_Visualizer {
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// IPlugin
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public string Identifier {
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get { return "Tutorial Visualizer"; }
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}
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private IApplication mAppRef;
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private byte[] mFileData;
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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_BITMAP = "tutorial-bitmap";
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private const string P_OFFSET = "offset";
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private const string P_BYTE_WIDTH = "byteWidth";
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private const string P_HEIGHT = "height";
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private const string P_ROW_STRIDE = "rowStride";
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private const int MAX_DIM = 4096;
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// Visualization descriptors.
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private VisDescr[] mDescriptors = new VisDescr[] {
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new VisDescr(VIS_GEN_BITMAP, "Tutorial Bitmap", 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("Width (in bytes)",
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P_BYTE_WIDTH, typeof(int), 1, 64, 0, 1),
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new VisParamDescr("Height",
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P_HEIGHT, typeof(int), 1, 512, 0, 1),
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new VisParamDescr("Row stride (bytes)",
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P_ROW_STRIDE, typeof(int), 0, 256, 0, 0),
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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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}
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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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}
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// IPlugin_Visualizer
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public VisDescr[] GetVisGenDescrs() {
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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_BITMAP:
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return GenerateBitmap(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 GenerateBitmap(ReadOnlyDictionary<string, object> parms) {
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int offset = Util.GetFromObjDict(parms, P_OFFSET, 0);
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int byteWidth = Util.GetFromObjDict(parms, P_BYTE_WIDTH, 1);
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int height = Util.GetFromObjDict(parms, P_HEIGHT, 1);
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int rowStride = Util.GetFromObjDict(parms, P_ROW_STRIDE, 0);
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if (rowStride == 0) {
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rowStride = byteWidth; // provide nice default when stride==0
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}
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if (offset < 0 || offset >= mFileData.Length ||
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byteWidth <= 0 || byteWidth > MAX_DIM ||
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height <= 0 || height > MAX_DIM) {
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mAppRef.ReportError("Invalid parameter");
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return null;
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}
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if (rowStride < byteWidth || rowStride > MAX_DIM) {
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mAppRef.ReportError("Invalid row stride");
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return null;
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}
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int lastOffset = offset + rowStride * height - 1;
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if (lastOffset >= mFileData.Length) {
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mAppRef.ReportError("Bitmap 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(byteWidth * 8, height);
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SetPalette(vb);
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// Convert bits to pixels.
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for (int row = 0; row < height; row++) {
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for (int byteCol = 0; byteCol < byteWidth; byteCol++) {
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byte val = mFileData[offset + row * rowStride + byteCol];
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for (int bit = 0; bit < 8; bit++) {
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if ((val & 0x80) != 0) {
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vb.SetPixelIndex(byteCol * 8 + bit, row, (byte)Color.Solid);
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} else {
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vb.SetPixelIndex(byteCol * 8 + bit, 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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}
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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 enum Color : byte {
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Transparent = 0,
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Solid = 1,
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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, 0xff); // 1=solid
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}
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}
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}
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