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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Examples/Core/TextFileLoading.cs
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Examples/Core/TextFileLoading.cs
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/*******************************************************************************************
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*
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* raylib [core] example - text file loading
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*
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* Example complexity rating: [★☆☆☆] 1/4
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*
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* Example originally created with raylib 5.5, last time updated with raylib 5.6
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*
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* Example contributed by Aanjishnu Bhattacharyya (@NimComPoo-04) and reviewed by Ramon Santamaria (@raysan5)
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*
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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) 0 Aanjishnu Bhattacharyya (@NimComPoo-04)
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*
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********************************************************************************************/
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using static Raylib_cs.Raymath;
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namespace Examples.Core;
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// NOTE: The upstream C code mutates the raw char buffers returned by LoadTextLines() in place,
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// temporarily null-terminating to reuse MeasureText for word wrapping. This C# port keeps the
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// same algorithm but works on managed char arrays: LoadFileText + split on '\n' reproduces
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// raylib's LoadTextLines('\n') behaviour, and '\n' characters are inserted where lines wrap.
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public partial class TextFileLoading : IExample
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{
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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 => "Core / Text File Loading";
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public string Title => "raylib [core] example - text file loading";
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private Camera2D cam;
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private string fileName;
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private string[] lines;
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private int lineCount;
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private int fontSize;
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private int textTop;
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private int wrapWidth;
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private int textHeight;
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private Rectangle scrollBar;
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public void Init()
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{
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// Setting up the camera
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cam = new Camera2D();
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cam.Offset = new Vector2(0, 0);
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cam.Target = new Vector2(0, 0);
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cam.Rotation = 0;
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cam.Zoom = 1;
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// Loading text file from resources/text_file.txt
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fileName = "resources/text_file.txt";
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string text = LoadFileText(fileName);
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// Loading all the text lines (raylib's LoadTextLines splits on '\n')
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lines = text.Split('\n');
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lineCount = lines.Length;
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// Stylistic choises
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fontSize = 20;
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textTop = 25 + fontSize; // Top of the screen from where the text is rendered
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wrapWidth = screenWidth - 20;
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// Wrap the lines as needed
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for (int i = 0; i < lineCount; i++)
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{
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char[] chars = lines[i].ToCharArray();
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int len = chars.Length;
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int j = 0;
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int lastSpace = 0; // Keeping track of last valid space to insert '\n'
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int lastWrapStart = 0; // Keeping track of the start of this wrapped line.
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while (j <= len)
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{
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char cur = (j < len) ? chars[j] : '\0';
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if (cur == ' ' || cur == '\0')
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{
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// Making a C style string by "cutting" at the required location so that we can use MeasureText
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string sub = new string(chars, lastWrapStart, j - lastWrapStart);
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// Checking if the text has crossed the wrapWidth, then going back and inserting a newline
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if (MeasureText(sub, fontSize) > wrapWidth)
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{
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chars[lastSpace] = '\n';
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// Since we added a newline the place of wrap changed so we update our lastWrapStart
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lastWrapStart = lastSpace + 1;
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}
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lastSpace = j; // Since we encountered a new space we update our last encountered space location
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}
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j++;
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}
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lines[i] = new string(chars);
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}
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// Calculating the total height so that we can show a scrollbar
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textHeight = 0;
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for (int i = 0; i < lineCount; i++)
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{
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Vector2 size = MeasureTextEx(GetFontDefault(), lines[i], (float)fontSize, 2);
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textHeight += (int)size.Y + 10;
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}
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// A simple scrollbar on the side to show how far we have read into the file
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scrollBar = new Rectangle(
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(float)screenWidth - 5,
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0,
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5,
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screenHeight * 100.0f / (textHeight - screenHeight)); // Scrollbar height is just a percentage
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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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float scroll = GetMouseWheelMove();
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cam.Target.Y -= scroll * fontSize * 1.5f; // Choosing an arbitrary speed for scroll
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if (cam.Target.Y < 0)
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{
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cam.Target.Y = 0; // Snapping to 0 if we go too far back
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}
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// Ensuring that the camera does not scroll past all text
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if (cam.Target.Y > textHeight - screenHeight + textTop)
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{
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cam.Target.Y = (float)textHeight - screenHeight + textTop;
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}
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// Computing the position of the scrollBar depending on the percentage of text covered
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scrollBar.Y = Lerp((float)textTop, (float)screenHeight - scrollBar.Height, (float)(cam.Target.Y - textTop) / (textHeight - screenHeight));
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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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BeginMode2D(cam);
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// Going through all the read lines
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for (int i = 0, t = textTop; i < lineCount; i++)
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{
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// Each time we go through and calculate the height of the text to move the cursor appropriately
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Vector2 size;
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if (lines[i] != "")
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{
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size = MeasureTextEx(GetFontDefault(), lines[i], (float)fontSize, 2);
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}
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else
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{
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// Fix for empty line in the text file
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size = MeasureTextEx(GetFontDefault(), " ", (float)fontSize, 2);
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}
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DrawText(lines[i], 10, t, fontSize, Color.Red);
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// Inserting extra space for real newlines,
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// wrapped lines are rendered closer together
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t += (int)size.Y + 10;
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}
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EndMode2D();
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// Header displaying which file is being read currently
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DrawRectangle(0, 0, screenWidth, textTop - 10, Color.Beige);
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DrawText($"File: {fileName}", 10, 10, fontSize, Color.Maroon);
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DrawRectangleRec(scrollBar, Color.Maroon);
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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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}
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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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InitWindow(screenWidth, screenHeight, "raylib [core] example - text file loading");
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var game = new TextFileLoading();
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game.Init();
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SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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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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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}
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