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swhardenswharden
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bitmap scroll/roll example
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13 files changed

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‎projects/18-01-10_fast_pixel_bitmap/WindowsFormsApp1/02 bitmap scroll/02 bitmap scroll.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{22482F88-CE61-47F9-B216-45A67AAB62E7}</ProjectGuid>
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<OutputType>WinExe</OutputType>
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<RootNamespace>_02_bitmap_scroll</RootNamespace>
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<AssemblyName>02 bitmap scroll</AssemblyName>
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<TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Deployment" />
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<Reference Include="System.Drawing" />
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<Reference Include="System.Net.Http" />
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<Reference Include="System.Windows.Forms" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="Form1.cs">
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<SubType>Form</SubType>
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</Compile>
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<Compile Include="Form1.Designer.cs">
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<DependentUpon>Form1.cs</DependentUpon>
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</Compile>
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<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<EmbeddedResource Include="Form1.resx">
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<DependentUpon>Form1.cs</DependentUpon>
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</EmbeddedResource>
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<EmbeddedResource Include="Properties\Resources.resx">
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<Generator>ResXFileCodeGenerator</Generator>
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<LastGenOutput>Resources.Designer.cs</LastGenOutput>
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<SubType>Designer</SubType>
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</EmbeddedResource>
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<Compile Include="Properties\Resources.Designer.cs">
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<AutoGen>True</AutoGen>
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<DependentUpon>Resources.resx</DependentUpon>
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</Compile>
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<None Include="Properties\Settings.settings">
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<Generator>SettingsSingleFileGenerator</Generator>
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<LastGenOutput>Settings.Designer.cs</LastGenOutput>
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</None>
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<Compile Include="Properties\Settings.Designer.cs">
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<AutoGen>True</AutoGen>
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<DependentUpon>Settings.settings</DependentUpon>
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<DesignTimeSharedInput>True</DesignTimeSharedInput>
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</Compile>
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</ItemGroup>
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<ItemGroup>
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<None Include="App.config" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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</Project>

‎projects/18-01-10_fast_pixel_bitmap/WindowsFormsApp1/02 bitmap scroll/App.config‎

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<?xml version="1.0" encoding="utf-8" ?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
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</startup>
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</configuration>

‎projects/18-01-10_fast_pixel_bitmap/WindowsFormsApp1/02 bitmap scroll/Form1.Designer.cs‎

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‎projects/18-01-10_fast_pixel_bitmap/WindowsFormsApp1/02 bitmap scroll/Form1.cs‎

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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using System.Drawing.Imaging; // for ImageLockMode
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using System.Runtime.InteropServices; // for Marshal
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namespace _02_bitmap_scroll
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{
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public partial class Form1 : Form
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{
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private static int update_count = 0;
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private static Random rand = new Random();
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private static List<List<double>> data; // a list of column pixel values
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public Form1()
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{
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InitializeComponent();
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Data_init();
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}
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/// <summary>
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/// return a list of random doubles from 0.0 to 1.0
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/// </summary>
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private List<double> Generate_list_random(int itemCount) {
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List<double> list = new List<double>(itemCount);
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for (int i=0; i< itemCount; i++)
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{
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list.Add(rand.NextDouble());
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}
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return list;
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}
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/// <summary>
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/// fill "data" with 2d random data
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/// </summary>
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private void Data_init()
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{
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int data_samples = pictureBox1.Width;
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int data_size = pictureBox1.Height;
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data = new List<List<double>>();
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for (int i=0; i<data_samples; i++)
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{
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data.Add(Generate_list_random(data_size));
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}
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System.Console.WriteLine("generated random data");
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}
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private void Bitmap_from_data()
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{
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// create a bitmap we will work with
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Bitmap bitmap = new Bitmap(data.Count, data[0].Count, PixelFormat.Format8bppIndexed);
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// modify the indexed palette to make it grayscale
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ColorPalette pal = bitmap.Palette;
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for (int i = 0; i < 256; i++)
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pal.Entries[i] = Color.FromArgb(255, i, i, i);
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bitmap.Palette = pal;
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// prepare to access data via the bitmapdata object
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BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
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ImageLockMode.ReadOnly, bitmap.PixelFormat);
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// create a byte array to reflect each pixel in the image
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byte[] pixels = new byte[bitmapData.Stride * bitmap.Height];
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// fill pixel array with data
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for (int col=0; col<data.Count; col++)
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{
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for (int row=0; row<data[col].Count; row++)
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{
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int bytePosition = row * bitmapData.Stride + col;
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pixels[bytePosition] = (byte)(255 * data[col][row]);
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}
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}
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// turn the byte array back into a bitmap
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Marshal.Copy(pixels, 0, bitmapData.Scan0, pixels.Length);
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bitmap.UnlockBits(bitmapData);
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// apply the bitmap to the picturebox
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pictureBox1.Image = bitmap;
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}
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private void Bitmap_roll()
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{
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data.Insert(data.Count, data[0]);
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data.RemoveAt(0);
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}
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private void timer1_Tick(object sender, EventArgs e)
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{
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for (int i=0; i<5; i++)
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{
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Bitmap_roll();
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}
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Bitmap_from_data();
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update_count += 1;
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label4.Text = string.Format("Update count: {0}", update_count);
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}
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}
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}

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