more code cleanup

internal/graphics/graphics.go

@@ -12,17 +12,63 @@ type Graphics struct {
 	Bounds Rect
 }
 
+func CreateGraphics(bounds Rect) *Graphics {
+	return &Graphics {
+		Bounds: bounds,
+		Style: Style {
+			Fill:         false,
+			FillColor:    rl.RayWhite,
+			Stroke:       true,
+			StrokeColor:  rl.Black,
+			StrokeWeight: 1.0,
+		},
+	}
+}
+
 type Style struct {
 	StrokeColor, FillColor color.RGBA
 	StrokeWeight float32
 	Stroke, Fill bool
 }
 
-func (g *Graphics) GetGraphicsWidth() int32 {
+func (g *Graphics) Center() Point {
+	return g.Bounds.Center()
+}
+
+func (g *Graphics) Begin() {
+	rl.BeginBlendMode(rl.BlendAlphaPremultiply)
+	g.PushMatrix()
+	g.Translate(g.Bounds.UL())
+	g.BeginClip(g.Bounds)
+}
+
+func (g *Graphics) Clear() {
+	rl.ClearBackground(rl.Blank)
+}
+
+func (g *Graphics) Background(c color.RGBA) {
+	rl.ClearBackground(c)
+}
+
+func (g *Graphics) End() {
+	g.EndBlend()
+	g.EndClip()
+	g.PopMatrix()
+}
+
+func (g *Graphics) Width() float32 {
+	return g.Bounds.Width
+}
+
+func (g *Graphics) Height() float32 {
+	return g.Bounds.Height
+}
+
+func (g *Graphics) WidthInt32() int32 {
 	return int32(g.Bounds.Width)
 }
 
-func (g *Graphics) GetGraphicsHeight() int32 {
+func (g *Graphics) HeightInt32() int32 {
 	return int32(g.Bounds.Height)
 }
 
@@ -33,11 +79,11 @@ func (g *Graphics) PushStyle() {
 func (g *Graphics) PopStyle() {
 }
 
-func (g *Graphics) SetStrokeColor(c Color) {
+func (g *Graphics) SetStrokeColor(c color.RGBA) {
 	g.Style.StrokeColor = color.RGBA { R: c.R, G: c.G, B: c.B, A: c.A }
 }
 
-func (g *Graphics) SetFillColor(c Color) {
+func (g *Graphics) SetFillColor(c color.RGBA) {
 	g.Style.FillColor = color.RGBA { R: c.R, G: c.G, B: c.B, A: c.A }
 }
 
@@ -87,6 +133,16 @@ func (g *Graphics) BeginTexture(t rl.RenderTexture2D) {
 	rl.BeginTextureMode(t)
 }
 
+
+func (g *Graphics) DrawTexture(t rl.Texture2D, p Point, c color.RGBA) {
+	rl.DrawTexture(t, int32(p.X), int32(p.Y), c)
+}
+
+
+func (g *Graphics) TransferTexture(t rl.Texture2D, src Rect, dst Rect, tint color.RGBA) {
+	rl.DrawTexturePro(t, src.ToRL(), dst.ToRL(), rl.Vector2{}, 0, tint)
+}
+
 func (g *Graphics) EndTexture() {
 	rl.EndTextureMode()
 }
@@ -114,22 +170,25 @@ func (g *Graphics) DrawLine(a, b Point) {
 	rl.SetLineWidth(saveLineWidth)
 }
 
-type Color color.RGBA
-
-func RGBA(r, g, b, a uint8) Color {
-	return Color { R: r, G: g, B: b, A: a }
-}
-
 type HSBA struct {
 	H uint
 	S, B float32
 	A uint8
 }
 
+var Origin = Point { X: 0, Y: 0, Z: 0 }
+
 type Point rl.Vector3
 type Vec rl.Vector3
 type Rect rl.Rectangle
 
+func (r *Rect) Center() Point {
+	return Point {
+		X: r.X + r.Width / 2,
+		Y: r.X + r.Height / 2,
+	}
+}
+
 func (p *Point) Add(v Vec) Point {
 	return Point { X: p.X + v.X, Y: p.Y + v.Y, Z: p.Z + v.Z }
 }