gg/img.go

package gg

import (
	"github.com/hajimehoshi/ebiten/v2"
	"image"
	_ "image/png"
	"io"
	"math"
)
import "surdeus.su/core/gg/mx"

type Image = ebiten.Image
type ImageRect = image.Rectangle
type ImagePoint = image.Point

type ColorValue uint32
type ColorMode = ebiten.ColorM
type Color struct {
	R, G, B, A ColorValue
}

const (
	MaxColorValue = math.MaxUint32
)

// The wrapper to make RGBA color via
// values from 0 to 1 (no value at all and the max value).
func RGBA(r, g, b, a mx.Float) Color {
	return Color {
		ColorValue(r*MaxColorValue),
		ColorValue(g*MaxColorValue),
		ColorValue(b*MaxColorValue),
		ColorValue(a*MaxColorValue),
	}
}

// Read an image from Reader and return
// a new *Image.
func LoadImage(input io.Reader) (*Image, error) {
	img, _, err := image.Decode(input)
	if err != nil {
		return nil, err
	}

	ret := ebiten.NewImageFromImage(img)
	return ret, nil
}

// Returns a new empty image
// with specified with and height.
func NewImage(w, h int) (*Image) {
	return ebiten.NewImage(w, h)
}

func NewImageFromImage(img image.Image) *Image {
	return ebiten.NewImageFromImage(img)
}

func (c Color) RGBA() (r, g, b, a uint32) {
	return uint32(c.R), uint32(c.G), uint32(c.B), uint32(c.A)
	
}