Move all engine stuff to GoRetro. Still many interactions between game and engine code that there should not be.

component_sprite_renderer.go

@@ -0,0 +1,57 @@
+package GoRetro
+
+/*
+ * --------------------
+ * spriteRenderer
+ * --------------------
+ * Loads a BMP into a texture and stores dimensions
+ */
+
+import (
+	"fmt"
+
+	"github.com/veandco/go-sdl2/sdl"
+)
+
+type spriteRenderer struct {
+	container     *Element
+	tex           *sdl.Texture
+	width, height int
+}
+
+func NewSpriteRenderer(container *Element, renderer *sdl.Renderer, filename string) *spriteRenderer {
+	sr := &spriteRenderer{}
+	var err error
+
+	sr.tex, err = loadTextureFromBMP(filename, renderer)
+	if err != nil {
+		panic(err)
+	}
+
+	_, _, width, height, err := sr.tex.Query()
+	if err != nil {
+		panic(fmt.Errorf("querying texture: %v", err))
+	}
+	sr.width = int(width)
+	sr.height = int(height)
+
+	sr.container = container
+
+	return sr
+}
+
+func (sr *spriteRenderer) onUpdate() error {
+	return nil
+}
+
+func (sr *spriteRenderer) onDraw() error {
+	return drawTexture(
+		sr.tex,
+		sr.container.Position,
+		sr.container.Rotation,
+		sr.container.Renderer)
+}
+
+func (sr *spriteRenderer) onCollision(other *Element) error {
+	return nil
+}