pixie/examples/realtime_wnim.nim
Ryan Oldenburg 4a0d9c29b8 morepretty
2021-10-27 16:44:22 -05:00

73 lines
2 KiB
Nim

import pixie, wNim/wApp, wNim/wFrame, wNim/wImage, wNim/wPaintDC
let
w = 256
h = 256
var
screen = newImage(w, h)
ctx = newContext(screen)
frameCount = 0
image = Image(w, h)
app = App()
frame = Frame(title = "wNim/Pixie")
proc draw() =
# draw shiny sphere on gradient background
let linerGradient = newPaint(pkGradientLinear)
linerGradient.gradientHandlePositions.add(vec2(0, 0))
linerGradient.gradientHandlePositions.add(vec2(0, 256))
linerGradient.gradientStops.add(
ColorStop(color: color(0, 0, 0, 1), position: 0))
linerGradient.gradientStops.add(
ColorStop(color: color(1, 1, 1, 1), position: 1))
ctx.fillStyle = linerGradient
ctx.fillRect(0, 0, 256, 256)
let radialGradient = newPaint(pkGradientRadial)
radialGradient.gradientHandlePositions.add(vec2(128, 128))
radialGradient.gradientHandlePositions.add(vec2(256, 128))
radialGradient.gradientHandlePositions.add(vec2(128, 256))
radialGradient.gradientStops.add(
ColorStop(color: color(1, 1, 1, 1), position: 0))
radialGradient.gradientStops.add(
ColorStop(color: color(0, 0, 0, 1), position: 1))
ctx.fillStyle = radialGradient
ctx.fillCircle(circle(
vec2(128.0, 128.0 + sin(float32(frameCount)/10.0) * 20),
76.8
))
inc frameCount
proc render() =
proc GdipCreateBitmapFromScan0(width: cint, height: cint, stride: cint,
format: cint, scan0: pointer, bitmap: pointer): cint
{.stdcall, discardable, dynlib: "gdiplus", importc.}
proc GdipDisposeImage(image: pointer): cint
{.stdcall, discardable, dynlib: "gdiplus", importc.}
const PixelFormat32bppARGB = 2498570
GdipDisposeImage(image.mGdipBmp)
GdipCreateBitmapFromScan0(cint w, cint h, cint w * 4,
PixelFormat32bppARGB, ctx.image.data[0].addr, addr image.mGdipBmp)
frame.clientSize = (w, h)
frame.startTimer(0.01)
frame.wEvent_Timer do ():
draw()
render()
frame.refresh(false)
frame.wEvent_Paint do ():
var dc = PaintDC(frame)
dc.drawImage(image)
frame.show()
app.mainLoop()