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

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tiger tiger tiger 2026-07-17 08:22:54 +02:00
commit 732b7aa346
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126
Examples/Textures/ImageDrawing.cs
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@ -1,13 +1,17 @@
/*******************************************************************************************
*
* raylib [textures] example - Image loading and drawing on it
* raylib [textures] example - image drawing
*
* Example complexity rating: [★★☆☆] 2/4
*
* NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
*
* This example has been created using raylib 1.4 (www.raylib.com)
* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
* Example originally created with raylib 1.4, last time updated with raylib 1.4
*
* Copyright (c) 2016 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) 2016-2025 Ramon Santamaria (@raysan5)
*
********************************************************************************************/
@ -16,85 +20,99 @@ using static Raylib_cs.Raylib;
namespace Examples.Textures;
public class ImageDrawing
public partial class ImageDrawing : IExample
{
public static int Main()
private const int screenWidth = 800;
private const int screenHeight = 450;
public string Name => "Textures / Image Drawing";
public string Title => "raylib [textures] example - image drawing";
private Texture2D texture;
public void Init()
{
// Initialization
//--------------------------------------------------------------------------------------
const int screenWidth = 800;
const int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [textures] example - image drawing");
// NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
Image cat = LoadImage("resources/cat.png");
ImageCrop(ref cat, new Rectangle(100, 10, 280, 380));
ImageFlipHorizontal(ref cat);
ImageResize(ref cat, 150, 200);
var cat = LoadImage("resources/cat.png"); // Load image in CPU memory (RAM)
ImageCrop(ref cat, new Rectangle(100, 10, 280, 380)); // Crop an image piece
ImageFlipHorizontal(ref cat); // Flip cropped image horizontally
ImageResize(ref cat, 150, 200); // Resize flipped-cropped image
Image parrots = LoadImage("resources/parrots.png");
var parrots = LoadImage("resources/parrots.png"); // Load image in CPU memory (RAM)
// Draw one image over the other with a scaling of 1.5f
Rectangle src = new(0, 0, cat.Width, cat.Height);
ImageDraw(ref parrots, cat, src, new Rectangle(30, 40, cat.Width * 1.5f, cat.Height * 1.5f), Color.White);
ImageCrop(ref parrots, new Rectangle(0, 50, parrots.Width, parrots.Height - 100));
ImageCrop(ref parrots, new Rectangle(0, 50, parrots.Width, parrots.Height - 100)); // Crop resulting image
// Draw on the image with a few image draw methods
ImageDrawPixel(ref parrots, 10, 10, Color.RayWhite);
ImageDrawCircle(ref parrots, 10, 10, 5, Color.RayWhite);
ImageDrawCircleLines(ref parrots, 10, 10, 5, Color.RayWhite);
ImageDrawRectangle(ref parrots, 5, 20, 10, 10, Color.RayWhite);
UnloadImage(cat);
UnloadImage(cat); // Unload image from RAM
// Load custom font for frawing on image
Font font = LoadFont("resources/fonts/custom_jupiter_crash.png");
// Load custom font for drawing on image
var font = LoadFont("resources/custom_jupiter_crash.png");
// Draw over image using custom font
ImageDrawTextEx(ref parrots, font, "PARROTS & CAT", new Vector2(300, 230), font.BaseSize, -2, Color.White);
// Unload custom spritefont (already drawn used on image)
UnloadFont(font);
UnloadFont(font); // Unload custom font (already drawn used on image)
Texture2D texture = LoadTextureFromImage(parrots);
UnloadImage(parrots);
texture = LoadTextureFromImage(parrots); // Image converted to texture, uploaded to GPU memory (VRAM)
UnloadImage(parrots); // Once image has been converted to texture and uploaded to VRAM, it can be unloaded from RAM
}
public void Update()
{
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
var x = screenWidth / 2 - texture.Width / 2;
var y = screenHeight / 2 - texture.Height / 2;
DrawTexture(texture, x, y - 40, Color.White);
DrawRectangleLines(x, y - 40, texture.Width, texture.Height, Color.DarkGray);
DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, Color.DarkGray);
DrawText("Source images have been cropped, scaled, flipped and copied one over the other.", 190, 370, 10, Color.DarkGray);
EndDrawing();
//----------------------------------------------------------------------------------
}
public void Unload()
{
UnloadTexture(texture); // Texture unloading
}
public static int Main()
{
// Initialization
//--------------------------------------------------------------------------------------
InitWindow(screenWidth, screenHeight, "raylib [textures] example - image drawing");
SetTargetFPS(60);
//---------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------
var game = new ImageDrawing();
game.Init();
// Main game loop
while (!WindowShouldClose())
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
// TODO: Update your variables here
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(Color.RayWhite);
int x = screenWidth / 2 - texture.Width / 2;
int y = screenHeight / 2 - texture.Height / 2;
DrawTexture(texture, x, y - 40, Color.White);
DrawRectangleLines(x, y - 40, texture.Width, texture.Height, Color.DarkGray);
DrawText("We are drawing only one texture from various images composed!", 240, 350, 10, Color.DarkGray);
string text = "Source images have been cropped, scaled, flipped and copied one over the other.";
DrawText(text, 90, 370, 10, Color.DarkGray);
EndDrawing();
//----------------------------------------------------------------------------------
game.Update();
}
game.Unload();
// De-Initialization
//--------------------------------------------------------------------------------------
UnloadTexture(texture);
CloseWindow();
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;