Initial commit

graphics/sdl.go

@@ -0,0 +1,65 @@
+package graphics
+
+import (
+	"github.com/pnx/go-raytracer/math"
+	"github.com/veandco/go-sdl2/sdl"
+)
+
+type Context struct {
+	w, h     int32
+	window   *sdl.Window
+	renderer *sdl.Renderer
+}
+
+func (c Context) Width() int32 {
+	return c.w
+}
+
+func (c Context) Height() int32 {
+	return c.h
+}
+
+func (c Context) DrawLine(x1 int32, y1 int32, x2 int32, y2 int32, color math.Color) {
+	c.renderer.SetDrawColor(color.R, color.G, color.B, color.A)
+	c.renderer.DrawLine(x1, y1, x2, y2)
+}
+
+func (c Context) DrawRect(x, y, w, h int32, color math.Color) {
+	c.renderer.SetDrawColor(color.R, color.G, color.B, color.A)
+	c.renderer.FillRect(&sdl.Rect{
+		X: x,
+		Y: y,
+		W: w,
+		H: h,
+	})
+}
+
+func (c Context) Sync() {
+	c.renderer.Present()
+}
+
+func (c Context) Exit() {
+	c.window.Destroy()
+	c.renderer.Destroy()
+	sdl.Quit()
+}
+
+func Init(title string, w, h int32) (*Context, error) {
+	if err := sdl.Init(sdl.INIT_VIDEO); err != nil {
+		return nil, err
+	}
+	window, err := sdl.CreateWindow(title, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, w, h, sdl.WINDOW_SHOWN)
+	if err != nil {
+		return nil, err
+	}
+	renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_SOFTWARE)
+	if err != nil {
+		return nil, err
+	}
+	return &Context{
+		w:        w,
+		h:        h,
+		window:   window,
+		renderer: renderer,
+	}, nil
+}