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WASM examples (+ backports of new official examples) (#344)

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* chg: New build system that uses the officially distributed binaries, bumped version to 8.0.0, simplified git workflow, removed deprecated OpenGL 1.1 functionality.

* chg: Modernize CI workflow, enable SourceLink

- Bump workflow actions to latest majors (Node 24); drop deprecated softprops/action-gh-release@v1
- Trigger push builds on main instead of master
- Create local nuget feed dir before pack (fixes NU1301)
- Enable Microsoft.SourceLink.GitHub for debugging symbols (ref PR #340)

* fix: centralized version data in Directory.build.props, and fixed various interop details that had incorrect function signatures

* chore: updated readme

* fix: version the native extract marker and chain download via DependsOnTargets

The .extracted marker now includes the raylib package name, so bumping
TargetRaylibTag re-extracts the new archive instead of silently keeping
(and packing/copying) the previous version's files.

_PrepareNativeLibrary and _StageWasmNative now depend directly on
_DownloadAndExtractInternal instead of CallTarget-ing it; dependency
targets run in the same project instance, so the resolved properties
(RaylibPackageName etc.) propagate naturally.

* fix: let the binding build for browser-wasm on both net8.0 and net10.0

The net8-era wasm workload (Microsoft.NET.Runtime.WebAssembly.Sdk 8.0.x,
auto-imported for RID browser-wasm) treats every browser-wasm project as
a wasm app: it forces OutputType=Exe after project evaluation (CS5001
for a classlib) and hooks its app-bundle build after Build, which errors
because a library has no assemblies to bundle. Opt Raylib-cs out via
DisableAutoWasmBuildApp (props time, before the workload defaults its
trigger) and pin OutputType back to Library in Directory.Build.targets
(evaluated after the workload props, so the assignment wins). net10's
wasm SDK needs neither workaround.

* chore: readme updated

* chg: simplifying build logic - a simple line in the documentation should save us the code here

* fix: Wrong signature of FrameBufferComplete

* chore: readme update

* feat: samples default to local project reference, and can optionally use the nuget package

* feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style

* chore: readme, gitignore, and targets backport.

* fix: Examples.csproj runs the download task when building locally

* feat: backporting existing raylib-cs examples and new official raylib examples to WASM, adopting raylib's original code style

* chore: readme, gitignore, and targets backport.

* chore: clean up linter warnings

* feat: html harness focuses the example and allows quick navigation with J/K instead.

* chore: readme mentions the property to use nuget vs. the local project reference

* feat: replaced the J/K navigation with good old HTML buttons

* chore: run dotnet format scoped default (was previously scoped to just 'style')
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Examples/Textures/CellularAutomata.cs Normal file
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/*******************************************************************************************
*
* raylib [textures] example - cellular automata
*
* Example complexity rating: [★★☆☆] 2/4
*
* Example originally created with raylib 5.6, last time updated with raylib 5.6
*
* Example contributed by Jordi Santonja (@JordSant) and reviewed by Ramon Santamaria (@raysan5)
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2025 Jordi Santonja (@JordSant)
*
********************************************************************************************/
namespace Examples.Textures;
public partial class CellularAutomata : IExample
{
// Initialization constants
//--------------------------------------------------------------------------------------
private const int screenWidth = 800;
private const int screenHeight = 450;
private const int imageWidth = 800;
private const int imageHeight = 800 / 2;
// Rule button sizes and positions
private const int drawRuleStartX = 585;
private const int drawRuleStartY = 10;
private const int drawRuleSpacing = 15;
private const int drawRuleGroupSpacing = 50;
private const int drawRuleSize = 14;
private const int drawRuleInnerSize = 10;
// Preset button sizes
private const int presetsSizeX = 42;
private const int presetsSizeY = 22;
private const int linesUpdatedPerFrame = 4;
public string Name => "Textures / Cellular Automata";
public string Title => "raylib [textures] example - cellular automata";
// Some interesting rules
private static readonly int[] presetValues = { 18, 30, 60, 86, 102, 124, 126, 150, 182, 225 };
private const int presetsCount = 10;
private Image image;
private Texture2D texture;
private int rule;
private int line;
private static void ComputeLine(ref Image image, int line, int rule)
{
// Compute next line pixels. Boundaries are not computed, always 0
for (var i = 1; i < imageWidth - 1; i++)
{
// Get, from the previous line, the 3 pixels states as a binary value
var prevValue = ((GetImageColor(image, i - 1, line - 1).R < 5) ? 4 : 0) + // Left pixel
((GetImageColor(image, i, line - 1).R < 5) ? 2 : 0) + // Center pixel
((GetImageColor(image, i + 1, line - 1).R < 5) ? 1 : 0); // Right pixel
// Get next value from rule bitmask
var currValue = (rule & (1 << prevValue)) != 0;
// Update pixel color
ImageDrawPixel(ref image, i, line, currValue ? Color.Black : Color.RayWhite);
}
}
public void Init()
{
// Image that contains the cellular automaton
image = GenImageColor(imageWidth, imageHeight, Color.RayWhite);
// The top central pixel set as black
ImageDrawPixel(ref image, imageWidth / 2, 0, Color.Black);
texture = LoadTextureFromImage(image);
// Variables
rule = 30; // Starting rule
line = 1; // Line to compute, starting from line 1. One point in line 0 is already set
}
public unsafe void Update()
{
// Update
//----------------------------------------------------------------------------------
// Handle mouse
var mouse = GetMousePosition();
var mouseInCell = -1; // -1: outside any button; 0-7: rule cells; 8+: preset cells
// Check mouse on rule cells
for (var i = 0; i < 8; i++)
{
var cellX = drawRuleStartX - drawRuleGroupSpacing * i + drawRuleSpacing;
var cellY = drawRuleStartY + drawRuleSpacing;
if ((mouse.X >= cellX) && (mouse.X <= cellX + drawRuleSize) &&
(mouse.Y >= cellY) && (mouse.Y <= cellY + drawRuleSize))
{
mouseInCell = i; // 0-7: rule cells
break;
}
}
// Check mouse on preset cells
if (mouseInCell < 0)
{
for (var i = 0; i < presetsCount; i++)
{
var cellX = 4 + (presetsSizeX + 2) * (i / 2);
var cellY = 2 + (presetsSizeY + 2) * (i % 2);
if ((mouse.X >= cellX) && (mouse.X <= cellX + presetsSizeX) &&
(mouse.Y >= cellY) && (mouse.Y <= cellY + presetsSizeY))
{
mouseInCell = i + 8; // 8+: preset cells
break;
}
}
}
if (IsMouseButtonPressed(MouseButton.Left) && (mouseInCell >= 0))
{
// Rule changed both by selecting a preset or toggling a bit
if (mouseInCell < 8)
{
rule ^= (1 << mouseInCell);
}
else
{
rule = presetValues[mouseInCell - 8];
}
// Reset image
ImageClearBackground(ref image, Color.RayWhite);
ImageDrawPixel(ref image, imageWidth / 2, 0, Color.Black);
line = 1;
}
// Compute next lines
//----------------------------------------------------------------------------------
if (line < imageHeight)
{
for (var i = 0; (i < linesUpdatedPerFrame) && (line + i < imageHeight); i++)
{
ComputeLine(ref image, line + i, rule);
}
line += linesUpdatedPerFrame;
UpdateTexture(texture, image.Data);
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
// Draw cellular automaton texture
DrawTexture(texture, 0, screenHeight - imageHeight, Color.White);
// Draw preset values
for (var i = 0; i < presetsCount; i++)
{
DrawText($"{presetValues[i]}", 8 + (presetsSizeX + 2) * (i / 2), 4 + (presetsSizeY + 2) * (i % 2), 20, Color.Gray);
DrawRectangleLines(4 + (presetsSizeX + 2) * (i / 2), 2 + (presetsSizeY + 2) * (i % 2), presetsSizeX, presetsSizeY, Color.Blue);
// If the mouse is on this preset, highlight it
if (mouseInCell == i + 8)
{
DrawRectangleLinesEx(new Rectangle(2 + (presetsSizeX + 2.0f) * (i / 2),
(presetsSizeY + 2.0f) * (i % 2),
presetsSizeX + 4.0f, presetsSizeY + 4.0f), 3, Color.Red);
}
}
// Draw rule bits
for (var i = 0; i < 8; i++)
{
// The three input bits
for (var j = 0; j < 3; j++)
{
DrawRectangleLines(drawRuleStartX - drawRuleGroupSpacing * i + drawRuleSpacing * j, drawRuleStartY, drawRuleSize, drawRuleSize, Color.Gray);
if ((i & (4 >> j)) != 0)
{
DrawRectangle(drawRuleStartX + 2 - drawRuleGroupSpacing * i + drawRuleSpacing * j, drawRuleStartY + 2, drawRuleInnerSize, drawRuleInnerSize, Color.Black);
}
}
// The output bit
DrawRectangleLines(drawRuleStartX - drawRuleGroupSpacing * i + drawRuleSpacing, drawRuleStartY + drawRuleSpacing, drawRuleSize, drawRuleSize, Color.Blue);
if ((rule & (1 << i)) != 0)
{
DrawRectangle(drawRuleStartX + 2 - drawRuleGroupSpacing * i + drawRuleSpacing, drawRuleStartY + 2 + drawRuleSpacing, drawRuleInnerSize, drawRuleInnerSize, Color.Black);
}
// If the mouse is on this rule bit, highlight it
if (mouseInCell == i)
{
DrawRectangleLinesEx(new Rectangle(drawRuleStartX - drawRuleGroupSpacing * i + drawRuleSpacing - 2.0f,
drawRuleStartY + drawRuleSpacing - 2.0f,
drawRuleSize + 4.0f, drawRuleSize + 4.0f), 3, Color.Red);
}
}
DrawText($"RULE: {rule}", drawRuleStartX + drawRuleSpacing * 4, drawRuleStartY + 1, 30, Color.Gray);
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
UnloadImage(image);
UnloadTexture(texture);
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] example - cellular automata");
SetTargetFPS(60);
//--------------------------------------------------------------------------------------
var game = new CellularAutomata();
game.Init();
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
game.Update();
}
game.Unload();
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
}