WASM examples (+ backports of new official examples) (#344)
* 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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/*******************************************************************************************
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*
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* raylib [shaders] example - Sieve of Eratosthenes
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* raylib [shaders] example - eratosthenes sieve
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*
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* Sieve of Eratosthenes, the earliest known (ancient Greek) prime number sieve.
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* Example complexity rating: [★★★☆] 3/4
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*
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* "Sift the twos and sift the threes,
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* The Sieve of Eratosthenes.
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* When the multiples sublime,
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* the numbers that are left are prime."
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* NOTE: Sieve of Eratosthenes, the earliest known (ancient Greek) prime number sieve
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*
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* "Sift the twos and sift the threes,
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* The Sieve of Eratosthenes.
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* When the multiples sublime,
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* the numbers that are left are prime."
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*
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* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
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* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
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* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version
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*
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* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3).
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* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3)
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*
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* This example has been created using raylib 2.5 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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* Example originally created with raylib 2.5, last time updated with raylib 4.0
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*
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* Example contributed by ProfJski and reviewed by Ramon Santamaria (@raysan5)
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* Example contributed by ProfJski (@ProfJski) and reviewed by Ramon Santamaria (@raysan5)
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*
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* Copyright (c) 2019 ProfJski and Ramon Santamaria (@raysan5)
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2019-2025 ProfJski (@ProfJski) and Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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using System.Numerics;
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using static Raylib_cs.Raylib;
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namespace Examples.Shaders;
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public class Eratosthenes
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public class Eratosthenes : IExample
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{
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const int GlslVersion = 330;
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#if BROWSER
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const int GlslVersion = 100; // WebGL1 needs GLSL ES 100
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#else
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private const int GlslVersion = 330;
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#endif
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private const int screenWidth = 800;
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private const int screenHeight = 450;
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public string Name => "Shaders / Eratosthenes";
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public string Title => "raylib [shaders] example - eratosthenes sieve";
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private RenderTexture2D target;
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private Shader shader;
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public void Init()
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{
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target = LoadRenderTexture(screenWidth, screenHeight);
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// Load Eratosthenes shader
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// NOTE: Defining 0 (NULL) for vertex shader forces usage of internal default vertex shader
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shader = LoadShader(null, $"resources/shaders/glsl{GlslVersion}/eratosthenes.fs");
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}
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public void Update()
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{
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// Update
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//----------------------------------------------------------------------------------
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// Nothing to do here, everything is happening in the shader
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginTextureMode(target); // Enable drawing to texture
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ClearBackground(Color.Black); // Clear the render texture
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// Draw a rectangle in shader mode to be used as shader canvas
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// NOTE: Rectangle uses font white character texture coordinates,
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// so shader can not be applied here directly because input vertexTexCoord
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// do not represent full screen coordinates (space where want to apply shader)
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DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), Color.Black);
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EndTextureMode(); // End drawing to texture (now we have a blank texture available for the shader)
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BeginDrawing();
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ClearBackground(Color.RayWhite); // Clear screen background
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BeginShaderMode(shader);
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// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
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DrawTextureRec(
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target.Texture,
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new Rectangle(0, 0, target.Texture.Width, -target.Texture.Height),
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new Vector2(0.0f, 0.0f),
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Color.White
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);
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EndShaderMode();
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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public void Unload()
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{
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UnloadShader(shader);
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UnloadRenderTexture(target);
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}
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public static int Main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [shaders] example - Sieve of Eratosthenes");
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RenderTexture2D target = LoadRenderTexture(screenWidth, screenHeight);
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// Load Eratosthenes shader
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// NOTE: Defining 0 (NULL) for vertex shader forces usage of internal default vertex shader
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Shader shader = LoadShader(null, $"resources/shaders/glsl{GlslVersion}/eratosthenes.fs");
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InitWindow(screenWidth, screenHeight, "raylib [shaders] example - eratosthenes sieve");
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SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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var game = new Eratosthenes();
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game.Init();
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// Main game loop
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while (!WindowShouldClose())
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{
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// Update
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//----------------------------------------------------------------------------------
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// Nothing to do here, everything is happening in the shader
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(Color.RayWhite);
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// Enable drawing to texture
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BeginTextureMode(target);
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ClearBackground(Color.Black);
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// Draw a rectangle in shader mode to be used as shader canvas
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// NOTE: Rectangle uses font white character texture coordinates,
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// so shader can not be applied here directly because input vertexTexCoord
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// do not represent full screen coordinates (space where want to apply shader)
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DrawRectangle(0, 0, GetScreenWidth(), GetScreenHeight(), Color.Black);
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// End drawing to texture (now we have a blank texture available for the shader)
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EndTextureMode();
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BeginShaderMode(shader);
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// NOTE: Render texture must be y-flipped due to default OpenGL coordinates (left-bottom)
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DrawTextureRec(
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target.Texture,
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new Rectangle(0, 0, target.Texture.Width, -target.Texture.Height),
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new Vector2(0.0f, 0.0f),
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Color.White
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);
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EndShaderMode();
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EndDrawing();
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//----------------------------------------------------------------------------------
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game.Update();
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}
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game.Unload();
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// De-Initialization
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//--------------------------------------------------------------------------------------
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UnloadShader(shader);
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UnloadRenderTexture(target);
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CloseWindow();
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//--------------------------------------------------------------------------------------
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