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examples: use double buffering for mandelbrot.v, to remove flickering on m1

pull/11467/head
Delyan Angelov 2021-09-10 19:46:10 +03:00
parent fa0983128f
commit 5010d18f27
1 changed files with 8 additions and 6 deletions
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14
examples/gg/mandelbrot.v
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@ -19,11 +19,12 @@ mut:
struct AppState {
mut:
gg &gg.Context = 0
iidx int
pixels [pheight][pwidth]u32
view ViewRect = ViewRect{-2.1320316, 0.55896836, -1.2200283, 1.47097206}
ntasks int = runtime.nr_jobs()
gg &gg.Context = 0
iidx int
pixels [pheight][pwidth]u32
npixels [pheight][pwidth]u32 // all drawing happens here, results are copied with vmemcpy to pixels at the end
view ViewRect = ViewRect{-2.7610033817025625, 1.1788897130338223, -1.824584023871934, 2.1153096311072788}
ntasks int = runtime.nr_jobs()
}
const colors = [gx.black, gx.blue, gx.red, gx.green, gx.yellow, gx.orange, gx.purple, gx.white,
@ -45,6 +46,7 @@ fn (mut state AppState) update() {
threads << go state.recalc_lines(cview, start, start + sheight)
}
threads.wait()
unsafe { vmemcpy(&state.pixels[0], &state.npixels[0], int(sizeof(state.pixels))) }
println('$state.ntasks threads; $sw.elapsed().milliseconds() ms / frame')
oview = cview
}
@ -63,7 +65,7 @@ fn (mut state AppState) recalc_lines(cview ViewRect, ymin f64, ymax f64) {
break
}
}
state.pixels[int(y_pixel)][int(x_pixel)] = u32(colors[iter % 8].abgr8())
state.npixels[int(y_pixel)][int(x_pixel)] = u32(colors[iter % 8].abgr8())
}
}
}