sprite.js

/*
Problem: Defining an API for sprite drawing calls

Some parameters of sprites:
- The bitmap with the sprite sheet
- Width and height
- Position X, Y
- Scale
- Rotation angle
- Flips (vertical, horizontal)

A batch version also to be available
*/

// Most basic way
MaskedBlit(screen, bmp, frame * frame_w, 0, frame_w, frame_h, x, y);

// Basic optimisation
var b = new Int32Array(6);
b[0] = frame_w;
b[1] = frame_h;
b[2] = frame * frame_w;
b[3] = 0;
b[4] = x;
b[5] = y;
BatchMaskedBlit(screen, bmp, b);

// Fancier way #1
SetSpriteSheet(bmp, frame_w, frame_h);
DrawSprite(screen, frame, x, y);

// Fancier way #2
DrawSprite(screen, {bitmap: bmp, width: frame_w, height: frame_h, x: x, y: y});

// Basic optimisation
var b = new Int32Array(4);
b[0] = x;
b[1] = y;
b[3] = frame;
BatchDrawSprite(screen, {bitmap: bmp, width: frame_w, height: frame_h}, b);

// Fancier way #3
var s = CreateSpriteSheet(bmp, frame_w, frame_h);
DrawSprite(screen, s, x, y, frame);

// The above with the extra parameters, a varadic function:
DrawTransformSprite(screen, s, SPRITE_ROTATE | SPRITE_SCALE | SPRITE_FLIP, x, y, frame, angle, scale, FLIP_V | FLIP_H);