64 lines
1.2 KiB
V
64 lines
1.2 KiB
V
import gg
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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 {
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mut:
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gg &gg.Context = 0
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istream_idx int
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pixels [pheight][pwidth]u32
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}
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[direct_array_access]
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fn (mut state AppState) update() {
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mut rcolor := u64(state.gg.frame)
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for {
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for y in 0 .. pheight {
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for x in 0 .. pwidth {
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rcolor = rcolor * 1664525 + 1013904223
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state.pixels[y][x] = u32(rcolor & 0x0000_0000_FFFF_FFFF) | 0x1010AFFF
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}
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}
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time.sleep(33 * time.millisecond)
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}
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}
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fn (mut state AppState) draw() {
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mut istream_image := state.gg.get_cached_image_by_idx(state.istream_idx)
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istream_image.update_pixel_data(&state.pixels)
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size := gg.window_size()
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state.gg.draw_image(0, 0, size.width, size.height, istream_image)
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}
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// gg callbacks:
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fn graphics_init(mut state AppState) {
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state.istream_idx = state.gg.new_streaming_image(pwidth, pheight, pbytes, pixel_format: .rgba8)
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}
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fn graphics_frame(mut state AppState) {
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state.gg.begin()
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state.draw()
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state.gg.end()
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}
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fn main() {
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mut state := &AppState{}
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state.gg = gg.new_context(
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width: 800
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height: 600
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create_window: true
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window_title: 'Random Static'
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init_fn: graphics_init
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frame_fn: graphics_frame
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user_data: state
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)
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go state.update()
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state.gg.run()
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}
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