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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,159 +1,15 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "image/color" | ||
| "math/rand" | ||
| "os" | ||
| "time" | ||
|
|
||
| "github.com/veandco/go-sdl2/sdl" | ||
| "github.com/xyproto/pixelpusher" | ||
| "github.com/xyproto/sdl2utils" | ||
| ) | ||
|
|
||
| const ( | ||
| // Size of "worldspace pixels", measured in "screenspace pixels" | ||
| pixelscale = 4 | ||
|
|
||
| // The resolution (worldspace) | ||
| width = 320 | ||
| height = 200 | ||
|
|
||
| // The width of the pixel buffer, used when calculating where to place pixels (y*pitch+x) | ||
| pitch = width | ||
|
|
||
| // Target framerate | ||
| frameRate = 60 | ||
|
|
||
| // Alpha value for opaque colors | ||
| opaque = 255 | ||
| ) | ||
|
|
||
| func run() int { | ||
|
|
||
| sdl.Init(uint32(sdl.INIT_VIDEO)) | ||
| defer sdl.Quit() | ||
|
|
||
| var ( | ||
| window *sdl.Window | ||
| renderer *sdl.Renderer | ||
| err error | ||
| ) | ||
|
|
||
| window, err = sdl.CreateWindow("Red Pixel", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, int32(width*pixelscale), int32(height*pixelscale), sdl.WINDOW_SHOWN) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err) | ||
| return 1 | ||
| } | ||
| defer window.Destroy() | ||
|
|
||
| renderer, err = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err) | ||
| return 1 | ||
| } | ||
| defer renderer.Destroy() | ||
|
|
||
| // Fill the render buffer with black | ||
| renderer.SetDrawColor(0, 0, 0, opaque) | ||
| renderer.Clear() | ||
|
|
||
| texture, err := renderer.CreateTexture(sdl.PIXELFORMAT_ARGB8888, sdl.TEXTUREACCESS_STREAMING, width, height) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Failed to create texture: %s\n", err) | ||
| return 1 | ||
| } | ||
|
|
||
| rand.Seed(time.Now().UnixNano()) | ||
|
|
||
| var ( | ||
| pixels = make([]uint32, width*height) | ||
| event sdl.Event | ||
|
|
||
| pause, recording, quit bool | ||
|
|
||
| loopCounter uint64 | ||
| frameCounter uint64 | ||
| ) | ||
|
|
||
| // Innerloop | ||
| for !quit { | ||
|
|
||
| if !pause { | ||
|
|
||
| // Draw a red pixel at 0,0 | ||
| pixelpusher.Pixel(pixels, 0, 0, color.RGBA{255, 0, 0, 255}, pitch) | ||
|
|
||
| // Draw a red pixel at 0,0 | ||
| //pixels[0] = 0xffff0000 | ||
|
|
||
| texture.UpdateRGBA(nil, pixels, pitch) | ||
|
|
||
| renderer.Copy(texture, nil, nil) | ||
| renderer.Present() | ||
|
|
||
| if recording { | ||
| filename := fmt.Sprintf("frame%05d.png", frameCounter) | ||
| pixelpusher.SavePixelsToPNG(pixels, pitch, filename, true) | ||
| frameCounter++ | ||
| } | ||
|
|
||
| } | ||
|
|
||
| // Check for events | ||
| for event = sdl.PollEvent(); event != nil; event = sdl.PollEvent() { | ||
| switch event.(type) { | ||
| case *sdl.QuitEvent: | ||
| quit = true | ||
| case *sdl.KeyboardEvent: | ||
| ke := event.(*sdl.KeyboardEvent) | ||
| if ke.Type == sdl.KEYDOWN { | ||
| ks := ke.Keysym | ||
| switch ks.Sym { | ||
| case sdl.K_ESCAPE: | ||
| quit = true | ||
| case sdl.K_q: | ||
| quit = true | ||
| case sdl.K_RETURN: | ||
| altHeldDown := ks.Mod == sdl.KMOD_LALT || ks.Mod == sdl.KMOD_RALT | ||
| if !altHeldDown { | ||
| // alt+enter is not pressed | ||
| break | ||
| } | ||
| // alt+enter is pressed | ||
| fallthrough | ||
| case sdl.K_f, sdl.K_F11: | ||
| sdl2utils.ToggleFullscreen(window) | ||
| case sdl.K_p, sdl.K_SPACE: | ||
| // pause toggle | ||
| pause = !pause | ||
| case sdl.K_s: | ||
| ctrlHeldDown := ks.Mod == sdl.KMOD_LCTRL || ks.Mod == sdl.KMOD_RCTRL | ||
| if !ctrlHeldDown { | ||
| // ctrl+s is not pressed | ||
| break | ||
| } | ||
| // ctrl+s is pressed | ||
| fallthrough | ||
| case sdl.K_F12: | ||
| // screenshot | ||
| sdl2utils.Screenshot(renderer, "screenshot.png", true) | ||
| case sdl.K_r: | ||
| // recording | ||
| recording = !recording | ||
| frameCounter = 0 | ||
| } | ||
| } | ||
| } | ||
| } | ||
| sdl.Delay(1000 / frameRate) | ||
| loopCounter++ | ||
| } | ||
| return 0 | ||
| func onDraw(gfx *pixelpusher.Config) error { | ||
| // x, y, r, g, b | ||
| return pixelpusher.Plot(gfx, 0, 0, 255, 0, 0) | ||
| } | ||
|
|
||
| func main() { | ||
| // This is to allow the deferred functions in run() to kick in at exit | ||
| os.Exit(run()) | ||
| gfx := pixelpusher.New("Red Pixel") | ||
| gfx.Run(onDraw, nil, nil, nil) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "errors" | ||
|
|
||
| "github.com/xyproto/pixelpusher" | ||
| ) | ||
|
|
||
| var x, y = 160, 100 | ||
|
|
||
| func onDraw(gfx *pixelpusher.Config) error { | ||
| return pixelpusher.Plot(gfx, x, y, 255, 0, 0) | ||
| } | ||
|
|
||
| func onPress(left, right, up, down, space, enter, esc bool) error { | ||
| if up { | ||
| y-- | ||
| } else if down { | ||
| y++ | ||
| } | ||
| if left { | ||
| x-- | ||
| } else if right { | ||
| x++ | ||
| } | ||
| if esc { | ||
| return errors.New("quit") | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func main() { | ||
| pixelpusher.New("Simple Draw").Run(onDraw, onPress, nil, nil) | ||
| } |
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