cell/scripts/graphics.js

var graphics = {}
var os = use('os')
var io = use('io')
var res = use('resources')

function calc_image_size(img)
{
  if (!img.texture || !img.rect) return;
  return [img.texture.width*img.rect.width, img.texture.height*img.rect.height];
}

function create_image(path)
{
  var data = io.slurpbytes(path);
  var newimg;
  switch(path.ext()) {
    case 'gif':
      newimg = os.make_gif(data);
      if (newimg.surface)
        newimg.texture = prosperon.gpu.load_texture(newimg.surface);
      else
        for (var frame of newimg.frames)
          frame.texture = prosperon.gpu.load_texture(frame.surface);
      break;
    case 'ase':
    case 'aseprite':
      newimg = os.make_aseprite(data);
      if (newimg.surface)
        newimg.texture = prosperon.gpu.load_texture(newimg.surface);
      else {
        for (var anim in newimg) {
          var a = newimg[anim];
          for (var frame of a.frames)
            frame.texture = prosperon.gpu.load_texture(frame.surface);
        }
      }
      break;
    default:
      newimg = {
        surface: os.make_texture(data)
      };
      newimg.texture = prosperon.gpu.load_texture(newimg.surface);
      break;
  }
  return newimg;
}

var image = {};
image.dimensions = function()
{
  return [this.texture.width, this.texture.height].scale([this.rect[2], this.rect[3]]);
}

var spritesheet;
var sheet_frames = [];
var sheetsize = 1024;

function pack_into_sheet(images)
{
  return;
  if (!Array.isArray(images)) images = [images];
  if (images[0].texture.width > 300 && images[0].texture.height > 300) return;
  sheet_frames = sheet_frames.concat(images);
  var sizes = sheet_frames.map(x => [x.rect.width*x.texture.width, x.rect.height*x.texture.height]);
  var pos = os.rectpack(sheetsize, sheetsize, sizes);
  if (!pos) {
    console.error(`did not make spritesheet properly from images ${images}`);
    console.info(sizes);
    return;
  }

  var newsheet = os.make_tex_data(sheetsize,sheetsize);

  for (var i = 0; i < pos.length; i++) {
    // Copy the texture to the new sheet
    newsheet.copy(sheet_frames[i].texture, pos[i], sheet_frames[i].rect);
    
    // Update the frame's rect to the new position in normalized coordinates
    sheet_frames[i].rect.x = pos[i][0] / newsheet.width;
    sheet_frames[i].rect.y = pos[i][1] / newsheet.height;
    sheet_frames[i].rect.width = sizes[i][0] / newsheet.width;
    sheet_frames[i].rect.height = sizes[i][1] / newsheet.height;
    sheet_frames[i].texture = newsheet;
  }

  newsheet.load_gpu();
  spritesheet = newsheet;
  return spritesheet;
}

graphics.is_image = function(obj)
{
  if (obj.texture && obj.rect) return true;
}

// Any request to it returns an image, which is a texture and rect.
graphics.texture = function texture(path) {
  if (typeof path !== 'string') {
    return path;
    throw new Error('need a string for graphics.texture')
  }
  var parts = path.split(':');
  var ipath = res.find_image(parts[0]);

  graphics.texture.cache[ipath] ??= create_image(ipath);
  return graphics.texture.cache[ipath];
}

graphics.texture.cache = {};
graphics.texture.time_cache = {};

graphics.texture.total_size = function()
{
  var size = 0;
//  Object.values(graphics.texture.cache).forEach(x => size += x.texture.inram() ? x..texture.width*x.texture.height*4 : 0);
  return size;
}

graphics.texture.total_vram = function()
{
  var vram = 0;
//  Object.values(graphics.texture.cache).forEach(x => vram += x.vram);
  return vram;
}

function merge_objects(ov,nv,arr)
{
  arr.forEach(x => ov[x] = nv[x])
}

graphics.tex_hotreload = function tex_hotreload(file) {
  console.log(`hot reloading ${file}`)
  if (!(file in graphics.texture.cache)) return;
  console.log('really doing it')

  var img = create_image(file);
  var oldimg = graphics.texture.cache[file];
  console.log(`new image:${json.encode(img)}`)
  console.log(`old image: ${json.encode(oldimg)}`)
  
  merge_objects(oldimg,img, ['surface', 'texture', 'loop', 'time']);
//  graphics.texture.cache[file] = img;
};

function make_spritesheet(paths, width, height)
{
  return
  var textures = paths.map(path => graphics.texture(path));
  var sizes = textures.map(tex => [tex.width, tex.height]);
  var pos = os.rectpack(width, height, sizes);
  if (!pos) return;
  
  var sheet = os.make_tex_data(width,height);

  var st = profile.now();
  for (var i = 0; i < pos.length; i++)
    sheet.copy(textures[i], pos[i].x, pos[i].y);

  sheet.save("spritesheet.qoi");

  sheet.load_gpu();
}

var fontcache = {};
var datas= [];
graphics.get_font = function get_font(path,size)
{
  var parts = path.split('.');
  if (!isNaN(parts[1])) {
    path = parts[0];
    size = Number(parts[1]);
  }
  var fullpath = res.find_font(path);
  if (!fullpath) throw new Error(`Cannot load font ${path}`)
  
  var fontstr = `${fullpath}.${size}`;
  if (fontcache[fontstr]) return fontcache[fontstr];
  
  var data = io.slurpbytes(fullpath);
  fontcache[fontstr] = os.make_font(data,size);
  fontcache[fontstr].texture = prosperon.gpu.load_texture(fontcache[fontstr].surface);
  return fontcache[fontstr];
}

graphics.semver = {};
graphics.semver.valid = function (v, range) {
  v = v.split(".");
  range = range.split(".");
  if (v.length !== 3) return undefined;
  if (range.length !== 3) return undefined;

  if (range[0][0] === "^") {
    range[0] = range[0].slice(1);
    if (parseInt(v[0]) >= parseInt(range[0])) return true;

    return false;
  }

  if (range[0] === "~") {
    range[0] = range[0].slice(1);
    for (var i = 0; i < 2; i++) if (parseInt(v[i]) < parseInt(range[i])) return false;
    return true;
  }

  return graphics.semver.cmp(v.join("."), range.join(".")) === 0;
};

graphics.semver.cmp = function (v1, v2) {
  var ver1 = v1.split(".");
  var ver2 = v2.split(".");

  for (var i = 0; i < 3; i++) {
    var n1 = parseInt(ver1[i]);
    var n2 = parseInt(ver2[i]);
    if (n1 > n2) return 1;
    else if (n1 < n2) return -1;
  }

  return 0;
};

graphics.semver.cmp.doc = "Compare two semantic version numbers, given like X.X.X.";
graphics.semver.valid.doc = `Test if semantic version v is valid, given a range.
Range is given by a semantic versioning number, prefixed with nothing, a ~, or a ^.
~ means that MAJOR and MINOR must match exactly, but any PATCH greater or equal is valid.
^ means that MAJOR must match exactly, but any MINOR and PATCH greater or equal is valid.`;

return graphics