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Image width and height #37

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Image width and height #37

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35 changes: 23 additions & 12 deletions raylib.js
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,8 @@ class RaylibJs {
this.currentPressedKeyState = new Set();
this.currentMouseWheelMoveState = 0;
this.currentMousePosition = {x: 0, y: 0};
this.images = [];
this.images = {};
this.nextTextureId = 0;
this.quit = false;
}

Expand Down Expand Up @@ -285,29 +286,39 @@ class RaylibJs {
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);
// TODO: get the true width and height of the image
result[1] = 256; // width
result[2] = 256; // height
result[3] = 1; // mipmaps
result[4] = 7; // format PIXELFORMAT_UNCOMPRESSED_R8G8B8A8
const id = this.nextTextureId++;
img.dataset.textureId = id;

img.addEventListener("load", () => {
this.images[img.dataset.textureId] = img;
});
img.src = filename;

var result = new Uint32Array(buffer, result_ptr, 1)
result[0] = id;
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 [id] = new Uint32Array(buffer, texture_ptr, 1);

// // TODO: implement tinting for DrawTexture
// const tint = getColorFromMemory(buffer, color_ptr);

this.ctx.drawImage(this.images[id], posX, posY);
const image = this.images[id];
if(image) {
this.ctx.drawImage(
image,
posX - (image.naturalWidth / 2),
posY - (image.naturalHeight / 2),
image.naturalWidth,
image.naturalHeight
);
}
}

// TODO: codepoints are not implemented
Expand Down