package sdl import ( "fmt" "git.kirsle.net/apps/doodle/render" "github.com/veandco/go-sdl2/sdl" ) // Copy a texture into the renderer. func (r *Renderer) Copy(t render.Texturer, src, dst render.Rect) { if tex, ok := t.(*Texture); ok { var ( a = RectToSDL(src) b = RectToSDL(dst) ) r.renderer.Copy(tex.tex, &a, &b) } } // Texture can hold on to SDL textures for caching and optimization. type Texture struct { tex *sdl.Texture width int32 height int32 } // Size returns the dimensions of the texture. func (t *Texture) Size() render.Rect { return render.NewRect(t.width, t.height) } // NewBitmap initializes a texture from a bitmap image. func (r *Renderer) NewBitmap(filename string) (render.Texturer, error) { surface, err := sdl.LoadBMP(filename) if err != nil { return nil, fmt.Errorf("NewBitmap: LoadBMP: %s", err) } defer surface.Free() // TODO: chroma key color hardcoded to white here key := sdl.MapRGB(surface.Format, 255, 255, 255) surface.SetColorKey(true, key) tex, err := r.renderer.CreateTextureFromSurface(surface) if err != nil { return nil, fmt.Errorf("NewBitmap: create texture: %s", err) } return &Texture{ width: surface.W, height: surface.H, tex: tex, }, nil }