Add example to wasm paths

Author: jkisor

index.html

@@ -47,7 +47,8 @@
         const wasmPaths = {
             "tsoding": ["game",],
             "core": ["core_basic_window", "core_basic_screen_manager", "core_input_keys", "core_input_mouse_wheel",],
-            "shapes": ["shapes_colors_palette"]
+            "shapes": ["shapes_colors_palette"],
+            "textures": ["textures_logo_raylib"]
         }
 
         const raylibExampleSelect = document.getElementById("raylib-example-select");

raylib.js

@@ -32,6 +32,7 @@ class RaylibJs {
         this.currentPressedKeyState = new Set();
         this.currentMouseWheelMoveState = 0;
         this.currentMousePosition = {x: 0, y: 0};
+        this.images = [];
         this.quit = false;
     }
 
@@ -235,6 +236,36 @@ class RaylibJs {
         return this.ctx.measureText(text).width;
     }
 
+    // RLAPI Texture2D LoadTexture(const char *fileName);
+    async LoadTexture(result_ptr, filename_ptr) {
+        const buffer = this.wasm.instance.exports.memory.buffer;
+        const filename = cstr_by_ptr(buffer, filename_ptr);
+
+        var result = new Uint32Array(buffer, result_ptr, 5)
+        var img = new Image();
+        img.src = filename;
+        this.images.push(img);
+
+        result[0] = this.images.indexOf(img);
+        result[1] = 256; // width
+        result[2] = 256; // height
+        result[3] = 1; // mipmaps
+        result[4] = 7; // format PIXELFORMAT_UNCOMPRESSED_R8G8B8A8
+
+        return result;
+    }
+
+    // RLAPI void DrawTexture(Texture2D texture, int posX, int posY, Color tint);
+    DrawTexture(texture_ptr, posX, posY, color_ptr) {
+        const buffer = this.wasm.instance.exports.memory.buffer;
+        const [id, width, height, mipmaps, format] = new Uint32Array(buffer, texture_ptr, 5);
+        // const tint = getColorFromMemory(buffer, color_ptr);
+
+        if(this.images[id]) {
+            this.ctx.drawImage(this.images[id], posX, posY);
+        }
+    }
+
     raylib_js_set_entry(entry) {
         this.entryFunction = this.wasm.instance.exports.__indirect_function_table.get(entry);
     }