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220 lines
7.9 KiB
C#
220 lines
7.9 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.Diagnostics;
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using CommonUtil;
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namespace PluginCommon {
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/// <summary>
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/// Bitmap with 8-bit palette indices, for use with visualization generators.
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/// </summary>
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/// <remarks>
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/// The bitmap is initially filled with color index 0.
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/// </remarks>
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[Serializable]
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public class VisBitmap8 : IVisualization2d {
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public const int MAX_DIMENSION = 4096;
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// IVisualization2d
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public int Width { get; private set; }
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// IVisualization2d
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public int Height { get; private set; }
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private byte[] mData;
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private int[] mPalette;
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private int mMaxColorIndex;
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/// <summary>
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/// Constructor.
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/// </summary>
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/// <param name="width">Bitmap width, in pixels.</param>
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/// <param name="height">Bitmap height, in pixels.</param>
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public VisBitmap8(int width, int height) {
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if (width <= 0 || width > MAX_DIMENSION || height <= 0 || height > MAX_DIMENSION) {
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throw new ArgumentException("Bad bitmap width/height " + width + "," + height);
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}
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Width = width;
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Height = height;
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mData = new byte[width * height];
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mPalette = new int[256]; // entries initialize to 0, i.e. transparent black
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mMaxColorIndex = 0;
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}
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//[Obsolete("use GetPixelIndex()")]
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public int GetPixel(int x, int y) {
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byte pix = mData[x + y * Width];
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return mPalette[pix];
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}
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/// <summary>
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/// Gets the color index for a single pixel.
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/// </summary>
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/// <param name="x">X coordinate.</param>
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/// <param name="y">Y coordinate.</param>
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/// <returns>Color index.</returns>
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public byte GetPixelIndex(int x, int y) {
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return mData[x + y * Width];
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}
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/// <summary>
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/// Sets the color for a single pixel.
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/// </summary>
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/// <param name="x">X coordinate.</param>
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/// <param name="y">Y coordinate.</param>
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/// <param name="colorIndex">Color index.</param>
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public void SetPixelIndex(int x, int y, byte colorIndex) {
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if (x < 0 || x >= Width || y < 0 || y >= Height) {
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throw new ArgumentException("Bad x/y: " + x + "," + y + " (width=" + Width +
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" height=" + Height + ")");
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}
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if (colorIndex < 0 || colorIndex >= mMaxColorIndex) {
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throw new ArgumentException("Bad color: " + colorIndex + " (nextCol=" +
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mMaxColorIndex + ")");
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}
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mData[x + y * Width] = colorIndex;
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}
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/// <summary>
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/// Sets the color for all pixels.
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/// </summary>
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/// <param name="colorIndex">Color index.</param>
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public void SetAllPixelIndices(byte colorIndex) {
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if (colorIndex < 0 || colorIndex >= mMaxColorIndex) {
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throw new ArgumentException("Bad color: " + colorIndex + " (nextCol=" +
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mMaxColorIndex + ")");
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}
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for (int i = 0; i < mData.Length; i++) {
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mData[i] = colorIndex;
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}
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}
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// IVisualization2d
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public byte[] GetPixels() {
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// TODO: remap any duplicate colors to reduce size of GIF
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return mData;
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}
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// IVisualization2d
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public int[] GetPalette() {
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// TODO: remove any duplicate colors to reduce size of GIF
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int[] pal = new int[mMaxColorIndex];
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for (int i = 0; i < mMaxColorIndex; i++) {
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pal[i] = mPalette[i];
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}
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return pal;
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}
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/// <summary>
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/// Adds a new color to the palette. If the color already exists, the call has no
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/// effect.
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/// </summary>
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/// <param name="color">32-bit ARGB color value.</param>
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//[Obsolete("use SetColor()")]
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public void AddColor(int color) {
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if (mMaxColorIndex == 256) {
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Debug.WriteLine("Palette is full");
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return;
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}
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// I'm expecting palettes to only have a few colors, so O(n^2) is fine for now.
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for (int i = 0; i < mMaxColorIndex; i++) {
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if (mPalette[i] == color) {
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Debug.WriteLine("Color " + color.ToString("x6") +
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" already exists in palette (" + i + ")");
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return;
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}
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}
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mPalette[mMaxColorIndex++] = color;
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}
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/// <summary>
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/// Adds a new color to the palette. If the color already exists, the call has no
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/// effect.
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/// </summary>
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/// <param name="a">Alpha value.</param>
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/// <param name="r">Red value.</param>
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/// <param name="g">Green value.</param>
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/// <param name="b">Blue value.</param>
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//[Obsolete("use SetColor()")]
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public void AddColor(byte a, byte r, byte g, byte b) {
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AddColor(Util.MakeARGB(a, r, g, b));
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}
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/// <summary>
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/// Sets the Nth entry in the color palette.
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/// </summary>
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/// <remarks>
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/// The size of the color palette will expand to hold the largest index. For best
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/// results, start with index 0 and count up, avoiding duplicates.
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/// </remarks>
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/// <param name="index">Palette index, 0-255.</param>
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/// <param name="a">Alpha value.</param>
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/// <param name="r">Red value.</param>
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/// <param name="g">Green value.</param>
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/// <param name="b">Blue value.</param>
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public void SetColor(int index, byte a, byte r, byte g, byte b) {
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if (index < 0 || index > 255) {
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throw new ArgumentException("Invalid index: " + index);
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}
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mPalette[index] = Util.MakeARGB(a, r, g, b);
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if (index >= mMaxColorIndex) {
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mMaxColorIndex = index + 1;
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}
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}
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/// <summary>
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/// Draws an 8x8 character cell on the bitmap.
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/// </summary>
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/// <remarks>
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/// Might want a way to specify that the background shouldn't be drawn at all.
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/// </remarks>
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/// <param name="vb">Bitmap to draw on.</param>
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/// <param name="ch">Character to draw.</param>
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/// <param name="xc">X coord of upper-left pixel.</param>
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/// <param name="yc">Y coord of upper-left pixel.</param>
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/// <param name="foreColor">Foreground color index.</param>
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/// <param name="backColor">Background color index.</param>
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public static void DrawChar(VisBitmap8 vb, char ch, int xc, int yc,
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byte foreColor, byte backColor) {
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int origXc = xc;
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int[] charBits = Font8x8.GetBitData(ch);
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for (int row = 0; row < 8; row++) {
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int rowBits = charBits[row];
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for (int col = 7; col >= 0; col--) {
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if ((rowBits & (1 << col)) != 0) {
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vb.SetPixelIndex(xc, yc, foreColor);
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} else {
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vb.SetPixelIndex(xc, yc, backColor);
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}
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xc++;
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}
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xc = origXc;
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yc++;
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}
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}
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// Character cell dimensions.
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public static int CharWidth { get { return 8; } }
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public static int CharHeight { get { return 8; } }
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}
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}
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