Source reference
examples/resources/graphics/luau/main.luau
--!strict
local byt = require("@bytorio")
local gfx, data = byt.gfx, byt.data
local scene: byt.Target
local indexed: byt.Target
local tex: byt.Texture
local full: byt.Texture
local palette: byt.Palette
local bands: byt.RowTable
local mask: byt.Pipeline
local overlay: byt.Pipeline
local additive: byt.Pipeline
local tablePipe: byt.Pipeline
local ticket: byt.Readback? = nil
local rows: { { palette: byt.Palette, x: number, y: number } } = {}
local framePixels: byt.PixelBuffer
local bench = false
return {
init = function()
local caps = byt.capabilities()
assert(caps.profile == 2 and caps.abi == 2 and caps.sdk == 512)
assert(caps.features == 7 and caps.protocol == 4)
assert(caps.resource_bytes == 67108864 and caps.slots == 1024)
assert(caps.payload_bytes == 1048576 and caps.audio_rate == 48000)
assert(caps.audio_lead_frames == 2400)
byt.display(320, 180)
local stencil = gfx.target({ format = "stencil8", width = 320, height = 180 })
scene = gfx.target({ format = "rgba8", width = 320, height = 180, stencil = stencil })
indexed = gfx.target({ format = "index8", width = 320, height = 180 })
local pixels = data.pixels("index8", 2, 2)
for i, value in { 1, 2, 3, 0 } do
buffer.writeu8(pixels.bytes, i - 1, value)
end
tex = gfx.texture({ format = "index8", width = 2, height = 2 })
gfx.upload(tex, { x = 0, y = 0, width = 2, height = 2 }, pixels)
framePixels = data.pixels("rgba8", 640, 360)
buffer.fill(framePixels.bytes, 0, 255)
full = gfx.texture({ format = "rgba8", width = 640, height = 360 })
gfx.upload(full, { x = 0, y = 0, width = 640, height = 360 }, framePixels)
local colors = buffer.create(1024)
buffer.writeu32(colors, 4, gfx.rgba(255, 0, 0, 255))
buffer.writeu32(colors, 8, gfx.rgba(0, 255, 0, 255))
buffer.writeu32(colors, 12, gfx.rgba(0, 0, 255, 255))
palette = gfx.palette(colors)
buffer.writeu32(colors, 12, gfx.rgba(255, 255, 0, 255))
local alternate = gfx.palette(colors)
local lut = buffer.create(65536)
for src = 0, 255 do
for dst = 0, 255 do
buffer.writeu8(lut, src * 256 + dst, (src + dst) % 256)
end
end
local table = gfx.color_table(lut)
tablePipe = gfx.pipeline({
format = "index8",
blend = "table",
color_table = table,
write_mask = 15,
})
mask = gfx.pipeline({
format = "rgba8",
write_mask = 0,
stencil = {
reference = 1,
replace_pass = true,
},
})
overlay = gfx.pipeline({
format = "rgba8",
blend = "over",
stencil = { compare = "equal", reference = 1, write_mask = 0 },
})
additive = gfx.pipeline({ format = "rgba8", blend = "add" })
bands = gfx.row_table(180)
for y = 0, 179 do
rows[y + 1] = { palette = if y % 2 == 0 then palette else alternate, x = y % 3, y = 0 }
end
gfx.write_rows(bands, 0, rows)
end,
update = function(_dt: number)
if ticket then
local result = gfx.poll(ticket)
if result then
assert(
data.get_pixel(result, 0, 0) == gfx.rgba(133, 10, 15, 255),
"readback lost submission version"
)
ticket = nil
end
end
bench = byt.button("down")
if bench then
byt.display(640, 360)
buffer.fill(framePixels.bytes, 0, byt.ticks() % 256)
gfx.upload(full, { x = 0, y = 0, width = 640, height = 360 }, framePixels)
return
end
byt.display(if byt.ticks() >= 10 then 640 else 320, if byt.ticks() >= 10 then 360 else 180)
if byt.ticks() == 10 then
local active = byt.pointer()
assert(not active, "mode switch changed the sampled pointer")
end
local color = buffer.create(4)
buffer.writeu32(color, 0, gfx.rgba(0, 0, (byt.ticks() * 13) % 256, 255))
gfx.write(palette, 12, color)
for y = 0, 179 do
rows[y + 1].x = (y + byt.ticks()) % 3
end
gfx.write_rows(bands, 0, rows)
end,
draw = function()
if bench then
gfx.present(full)
return
end
local p = gfx.begin_pass(indexed, { clear = true, color = 1 })
gfx.bind(p, tablePipe)
gfx.rect(p, 0, 0, 16, 16, 2)
gfx.bind(p, gfx.default_pipeline("index8"))
gfx.draw(
p,
tex,
{ x = -1, y = -1, width = 4, height = 4 },
{ x = 16, y = 0, width = 8, height = 8 },
{ flip_x = true, repeat_image = true }
)
gfx.end_pass(p)
p = gfx.begin_pass(
scene,
{ clear = true, color = gfx.rgba(10, 20, 30, 255), clear_stencil = true }
)
gfx.bind(p, mask)
gfx.rect(p, 10, 10, 40, 40, gfx.rgba(255, 255, 255, 255))
gfx.bind(p, overlay)
gfx.rect(p, 0, 0, 80, 80, gfx.rgba(255, 0, 0, 128))
gfx.bind(p, gfx.default_pipeline("rgba8"))
gfx.clip(p, 20, 20, 2, 2)
gfx.rect(p, 0, 0, 80, 80, gfx.rgba(0, 255, 0, 255))
gfx.clip(p, 0, 0, 320, 180)
gfx.transform(p, { 0, 1, -1, 0, 60, 0 })
gfx.rect(p, 0, 0, 10, 10, gfx.rgba(0, 0, 255, 255))
gfx.transform(p, { 1, 0, 0, 1, 0, 0 })
gfx.draw(
p,
indexed,
{ x = 0, y = 0, width = 24, height = 24 },
{ x = 120, y = 0, width = 48, height = 48 },
{ palette = palette }
)
gfx.bind(p, additive)
gfx.rect(p, 80, 0, 8, 8, gfx.rgba(0, 0, 255, 64))
gfx.bind(p, gfx.default_pipeline("rgba8"))
byt.sprite(0, 180, 20)
byt.text("PASS", 180, 45, byt.rgb(255, 255, 255))
if byt.button("up") then
gfx.draw(
p,
scene,
{ x = 0, y = 0, width = 1, height = 1 },
{ x = 0, y = 0, width = 1, height = 1 }
)
end
gfx.end_pass(p)
if not ticket then
ticket = gfx.readback(scene, { x = 10, y = 10, width = 2, height = 2 })
end
p = gfx.begin_pass(scene)
gfx.rect(p, 10, 10, 2, 2, gfx.rgba(0, 255, 0, 255))
gfx.end_pass(p)
if byt.ticks() % 8 >= 4 and byt.ticks() < 10 then
gfx.present(indexed, { rows = bands, repeat_image = true })
elseif byt.ticks() >= 10 then
local screen = gfx.screen()
p = gfx.begin_pass(screen, { clear = true, color = byt.rgb(0, 0, 0) })
gfx.draw(
p,
scene,
{ x = 0, y = 0, width = 320, height = 180 },
{ x = 0, y = 0, width = 640, height = 360 }
)
gfx.end_pass(p)
gfx.present(screen)
else
gfx.present(scene)
end
end,
}