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import gg
import time
const pwidth = 800
const pheight = 600
const pbytes = 4
struct AppState {
mut:
gg &gg.Context = 0
istream_idx int
pixels [pheight][pwidth]u32
}
[direct_array_access]
fn (mut state AppState) update() {
mut rcolor := u64(state.gg.frame)
for {
for y in 0 .. pheight {
for x in 0 .. pwidth {
rcolor = rcolor * 1664525 + 1013904223
state.pixels[y][x] = u32(rcolor & 0x0000_0000_FFFF_FFFF) | 0x1010AFFF
}
}
time.sleep(33 * time.millisecond)
}
}
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)
}
// gg callbacks:
fn graphics_init(mut state AppState) {
state.istream_idx = state.gg.new_streaming_image(pwidth, pheight, pbytes, pixel_format: .rgba8)
}
fn graphics_frame(mut state AppState) {
state.gg.begin()
state.draw()
state.gg.end()
}
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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