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examples: add examples/gg/random.v demonstrating how to stream images…
…/pixels
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Original file line number | Diff line number | Diff line change |
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import gg | ||
import time | ||
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const pwidth = 800 | ||
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const pheight = 600 | ||
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const pbytes = 4 | ||
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struct AppState { | ||
mut: | ||
gg &gg.Context = 0 | ||
istream_idx int | ||
pixels [pwidth][pheight]u32 | ||
} | ||
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[direct_array_access] | ||
fn (mut state AppState) update() { | ||
mut rcolor := u64(state.gg.frame) | ||
for { | ||
for x in 0 .. pwidth { | ||
for y in 0 .. pheight { | ||
rcolor = rcolor * 1664525 + 1013904223 | ||
state.pixels[x][y] = u32(rcolor & 0x0000_0000_FFFF_FFFF) | 0x1010AFFF | ||
} | ||
} | ||
time.sleep(33 * time.millisecond) | ||
} | ||
} | ||
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fn (mut state AppState) draw() { | ||
mut istream_image := state.gg.get_cached_image_by_idx(state.istream_idx) | ||
istream_image.update_pixel_data(&state.pixels) | ||
size := gg.window_size() | ||
state.gg.draw_image(0, 0, size.width, size.height, istream_image) | ||
} | ||
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// gg callbacks: | ||
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fn graphics_init(mut state AppState) { | ||
state.istream_idx = state.gg.new_streaming_image(pwidth, pheight, pbytes) | ||
} | ||
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fn graphics_frame(mut state AppState) { | ||
state.gg.begin() | ||
state.draw() | ||
state.gg.end() | ||
} | ||
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fn main() { | ||
mut state := &AppState{} | ||
state.gg = gg.new_context( | ||
width: 800 | ||
height: 600 | ||
create_window: true | ||
window_title: 'Random Static' | ||
init_fn: graphics_init | ||
frame_fn: graphics_frame | ||
user_data: state | ||
) | ||
go state.update() | ||
state.gg.run() | ||
} |
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b239142
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Cool example! Why are there no locks? Is access to the image array atomic?