blooblib/draw_image.go

package bloob

func (image *Image) Draw(other *Image, dst Vec2i) {
	image.DrawSub(other, dst, Recti{Size: other.Size})
}

func (image *Image) DrawSub(other *Image, pos Vec2i, rect Recti) {
	start, end, dst := CropToArea(image.Size, rect, pos)
	//println(start.X, "|", end.X, "|", dst.X, "|", pos.X)
	//println(end.Y)
	if other.Alpha {
		for y := start.Y; y < end.Y; y += 1 {
			for x := start.X; x < end.X; x += 1 {
				//println(y)
				val := other.Data[x+y*other.Size.X]
				if val&0xff000000 > 0 {
					image.Data[(x+dst.X)+(y+dst.Y)*image.Size.X] = val
				}
			}
		}
	} else {
		for y := start.Y; y < end.Y; y += 1 {
			for x := start.X; x < end.X; x += 1 {
				image.Data[(x+dst.X)+(y+dst.Y)*image.Size.X] = other.Data[x+y*other.Size.X]
			}
		}
	}
}

func (image *Image) DrawColor(other *Image, dst Vec2i, color Color) {
	image.DrawSubColor(other, dst, Recti{Size: other.Size}, color)
}

func (image *Image) DrawSubColor(other *Image, pos Vec2i, rect Recti, color Color) {
	start, end, dst := CropToArea(image.Size, rect, pos)
	for y := start.Y; y < end.Y; y += 1 {
		for x := start.X; x < end.X; x += 1 {
			//println(y)
			val := other.Data[x+y*other.Size.X]
			if val&0xff000000 > 0 {
				image.Data[(x+dst.X)+(y+dst.Y)*image.Size.X] = color
			}
		}
	}
}

func (image *Image) DrawUpscale(other *Image) {
	var scale int
	if image.Size.X/other.Size.X < image.Size.Y/other.Size.Y {
		scale = image.Size.X / other.Size.X
	} else {
		scale = image.Size.Y / other.Size.Y
	}

	switch scale {
	case 1:
		wg.Add(other.Size.Y)
		for y := 0; y < other.Size.Y; y += 1 {
			go func(image, other *Image, y int) {
				defer wg.Done()
				for x := 0; x < other.Size.X; x += 1 {
					val := other.Data[x+y*other.Size.X]
					image.Data[(x*scale)+(y*scale)*image.Size.X] = val
				}
			}(image, other, y)
		}
		wg.Wait()
		break
	case 2:
		wg.Add(other.Size.Y)
		for y := 0; y < other.Size.Y; y += 1 {
			go func(image, other *Image, y int) {
				defer wg.Done()
				for x := 0; x < other.Size.X; x += 1 {
					val := other.Data[x+y*other.Size.X]
					val2 := (val & 0xfefefe) >> 1
					dx := x * 2
					dy := y * 2
					image.Data[(dx+0)+(dy+0)*image.Size.X] = val
					image.Data[(dx+1)+(dy+0)*image.Size.X] = val
					image.Data[(dx+0)+(dy+1)*image.Size.X] = val2
					image.Data[(dx+1)+(dy+1)*image.Size.X] = val2
				}
			}(image, other, y)
		}
		wg.Wait()
		break
	case 3:
		wg.Add(other.Size.Y)
		//println("Before thread count : ", threadProfile.Count())
		for y := 0; y < other.Size.Y; y += 1 {
			go func(image, other *Image, y int) {
				defer wg.Done()
				for x := 0; x < other.Size.X; x += 1 {
					val := other.Data[x+y*other.Size.X]
					val2 := (val & 0xfefefe) >> 1
					dx := x * 3
					dy := y * 3
					image.Data[(dx+0)+(dy+0)*image.Size.X] = val
					image.Data[(dx+1)+(dy+0)*image.Size.X] = val
					image.Data[(dx+2)+(dy+0)*image.Size.X] = val2
					image.Data[(dx+0)+(dy+1)*image.Size.X] = val
					image.Data[(dx+1)+(dy+1)*image.Size.X] = val
					image.Data[(dx+2)+(dy+1)*image.Size.X] = val2
					image.Data[(dx+0)+(dy+2)*image.Size.X] = val2
					image.Data[(dx+1)+(dy+2)*image.Size.X] = val2
					image.Data[(dx+2)+(dy+2)*image.Size.X] = val2
				}
			}(image, other, y)
		}
		//println("After thread count : ", threadProfile.Count())
		wg.Wait()
		break
	case 4:
		wg.Add(other.Size.Y)
		for y := 0; y < other.Size.Y; y += 1 {
			go func(image, other *Image, y int) {
				defer wg.Done()
				for x := 0; x < other.Size.X; x += 1 {
					val := other.Data[x+y*other.Size.X]
					dx := x * 4
					dy := y * 4
					image.Data[(dx+0)+(dy+0)*image.Size.X] = val
					image.Data[(dx+1)+(dy+0)*image.Size.X] = val
					image.Data[(dx+2)+(dy+0)*image.Size.X] = val
					image.Data[(dx+3)+(dy+0)*image.Size.X] = val
					image.Data[(dx+0)+(dy+1)*image.Size.X] = val
					image.Data[(dx+1)+(dy+1)*image.Size.X] = val
					image.Data[(dx+2)+(dy+1)*image.Size.X] = val
					image.Data[(dx+3)+(dy+1)*image.Size.X] = val
					image.Data[(dx+0)+(dy+2)*image.Size.X] = val
					image.Data[(dx+1)+(dy+2)*image.Size.X] = val
					image.Data[(dx+2)+(dy+2)*image.Size.X] = val
					image.Data[(dx+3)+(dy+2)*image.Size.X] = val
					image.Data[(dx+0)+(dy+3)*image.Size.X] = val
					image.Data[(dx+1)+(dy+3)*image.Size.X] = val
					image.Data[(dx+2)+(dy+3)*image.Size.X] = val
					image.Data[(dx+3)+(dy+3)*image.Size.X] = val
				}
			}(image, other, y)
		}
		wg.Wait()
		break
	default:
		wg.Add(other.Size.Y)
		for y := 0; y < other.Size.Y; y += 1 {
			go func(image, other *Image, y int) {
				defer wg.Done()
				for x := 0; x < other.Size.X; x += 1 {
					val := other.Data[x+y*other.Size.X]
					for sy := 0; sy < scale; sy += 1 {
						for sx := 0; sx < scale; sx += 1 {
							image.Data[(x*scale+sx)+(y*scale+sy)*image.Size.X] = val
						}
					}
				}
			}(image, other, y)
		}
		wg.Wait()
		break
	}
}