local imageUtils = {}

-- module code

local function foreach(table_, fun_)
    for _, tab in pairs(table_) do fun_(tab) end
    return table_
end

function imageUtils.create_burnt_patch_pictures()
    local base = {
	filename = "__base__/graphics/entity/fire-flame/burnt-patch.png",
	line_length = 3,
	width = 115,
	height = 56,
	frame_count = 9,
	axially_symmetrical = false,
	direction_count = 1,
	shift = {-0.09375, 0.125},
    }
    
    local variations = {}
    
    for y=1,(base.frame_count / base.line_length) do
	for x=1,base.line_length do
	    table.insert(variations, 
			 { 
			     filename = base.filename,
			     width = base.width,
			     height = base.height,
			     tint = base.tint,
			     shift = base.shift,
			     x = (x-1) * base.width,
			     y = (y-1) * base.height,
	    })
	end
    end

    return variations
end


function imageUtils.create_small_tree_flame_animations(opts)
    local fire_blend_mode = opts.blend_mode or "additive"
    local fire_animation_speed = opts.animation_speed or 0.5
    local fire_scale =  opts.scale or 1
    local fire_tint = opts.smallTreeFlameTint
    local fire_flags = { "compressed" }
    local retval = {
	{
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-01-a.png",
	    line_length = 8,
	    width = 38,
	    height = 110,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.03125, -1.5},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	},
	{
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-01-b.png",
	    line_length = 8,
	    width = 39,
	    height = 111,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.078125, -1.51562},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	},
	{
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-01-c.png",
	    line_length = 8,
	    width = 44,
	    height = 108,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.15625, -1.5},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-03-a.png",
	    line_length = 8,
	    width = 38,
	    height = 110,
	    frame_count = 23,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.03125, -1.5},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-03-b.png",
	    line_length = 8,
	    width = 34,
	    height = 98,
	    frame_count = 23,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.03125, -1.34375},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/tree-fire-flame-03-c.png",
	    line_length = 8,
	    width = 39,
	    height = 111,
	    frame_count = 23,
	    axially_symmetrical = false,
	    direction_count = 1,
	    shift = {-0.078125, -1.51562},
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags
	}
    }
    
    return foreach(retval, function(tab)
				     if tab.shift and tab.scale then tab.shift = { tab.shift[1] * tab.scale, tab.shift[2] * tab.scale } end
    end)
end

function imageUtils.create_fire_pictures(opts)
    local fire_blend_mode = opts.blend_mode or "additive"
    local fire_animation_speed = opts.animation_speed or 0.5
    local fire_scale =  opts.scale or 1
    local fire_tint = opts.firePictureTint
    local fire_flags = { "compressed" }
    local retval = {
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-13.png",
	    line_length = 8,
	    width = 60,
	    height = 118,
	    frame_count = 25,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.0390625, -0.90625 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-12.png",
	    line_length = 8,
	    width = 63,
	    height = 116,
	    frame_count = 25,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.015625, -0.914065 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-11.png",
	    line_length = 8,
	    width = 61,
	    height = 122,
	    frame_count = 25,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.0078125, -0.90625 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-10.png",
	    line_length = 8,
	    width = 65,
	    height = 108,
	    frame_count = 25,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.0625, -0.64844 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-09.png",
	    line_length = 8,
	    width = 64,
	    height = 101,
	    frame_count = 25,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.03125, -0.695315 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-08.png",
	    line_length = 8,
	    width = 50,
	    height = 98,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.0546875, -0.77344 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-07.png",
	    line_length = 8,
	    width = 54,
	    height = 84,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0.015625, -0.640625 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-06.png",
	    line_length = 8,
	    width = 65,
	    height = 92,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0, -0.83594 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-05.png",
	    line_length = 8,
	    width = 59,
	    height = 103,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0.03125, -0.882815 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-04.png",
	    line_length = 8,
	    width = 67,
	    height = 130,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0.015625, -1.109375 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-03.png",
	    line_length = 8,
	    width = 74,
	    height = 117,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0.046875, -0.984375 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-02.png",
	    line_length = 8,
	    width = 74,
	    height = 114,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { 0.0078125, -0.96875 }
	},
	{ 
	    filename = "__base__/graphics/entity/fire-flame/fire-flame-01.png",
	    line_length = 8,
	    width = 66,
	    height = 119,
	    frame_count = 32,
	    axially_symmetrical = false,
	    direction_count = 1,
	    blend_mode = fire_blend_mode,
	    animation_speed = fire_animation_speed,
	    scale = fire_scale,
	    tint = fire_tint,
	    flags = fire_flags,
	    shift = { -0.0703125, -1.039065 }
	},
    }
    return foreach(retval, function(tab)
				     if tab.shift and tab.scale then tab.shift = { tab.shift[1] * tab.scale, tab.shift[2] * tab.scale } end
    end)
end

return imageUtils