From f09d855593cc5405937d20571526f81583f0cb8b Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Thu, 21 Mar 2024 21:35:15 +0000
Subject: the

---
 main.ha  | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 main.lua | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 spec     |  8 ++++++++
 3 files changed, 125 insertions(+)
 create mode 100644 main.ha
 create mode 100644 main.lua
 create mode 100644 spec

diff --git a/main.ha b/main.ha
new file mode 100644
index 0000000..42d42cf
--- /dev/null
+++ b/main.ha
@@ -0,0 +1,62 @@
+use fmt;
+use sdl2;
+
+export fn main() void = {
+	sdl2::SDL_Init(sdl2::SDL_INIT_VIDEO)!;
+	defer sdl2::SDL_Quit();
+
+	const win = sdl2::SDL_CreateWindow("hi", sdl2::SDL_WINDOWPOS_UNDEFINED, sdl2::SDL_WINDOWPOS_UNDEFINED, 640, 480, sdl2::SDL_WindowFlags::NONE)!;
+	defer sdl2::SDL_DestroyWindow(win);
+
+	const wsurf = sdl2::SDL_GetWindowSurface(win)!;
+	const format = wsurf.format;
+	assert(format.bytesperpixel == 4, "can only work with u32 pixels");
+	fmt::printfln("got format {}. bytes per pixel {}. r{:x} g{:x} b{:x} a{:x}",
+		format.format, format.bytesperpixel, format.rmask, format.gmask, format.bmask, format.amask)!;
+	fmt::printfln("red: {:x} green {:x} blue {:x}",
+		sdl2::SDL_MapRGB(format, 255, 0, 0),
+		sdl2::SDL_MapRGB(format, 0, 255, 0),
+		sdl2::SDL_MapRGB(format, 0, 0, 255))!;
+	fmt::println(wsurf.w * wsurf.h)!;
+
+	const pixels = (wsurf.pixels as *opaque: *[*]u32)[..wsurf.w * wsurf.h];
+
+
+	let quit = false;
+	let n = 0z;
+	for (!quit) {
+		let ev = sdl2::event { ... };
+		for (sdl2::SDL_PollEvent(&ev)! == 1) switch (ev.event_type) {
+			case sdl2::SDL_EventType::QUIT => quit = true;
+			case sdl2::SDL_EventType::KEYDOWN => {
+				const keysym = ev.key.keysym.sym;
+				if (keysym == sdl2::SDL_Keycode::ESCAPE) quit = true;
+				fmt::println("got key", keysym: int)!;
+			};
+			case => void;
+		};
+
+		for (let i = 0z; i < 100; i+=1) {
+			pixels[n] = sdl2::SDL_MapRGB(format, 0, 255, 0);
+			n += 1;
+		};
+
+
+		sdl2::SDL_UpdateWindowSurface(win)!;
+		sdl2::SDL_Delay(1000 / 60);
+
+		// sdl2::SDL_SetRenderDrawColor(render, 50, 50, 50, 255)!;
+		// sdl2::SDL_RenderClear(render)!;
+
+		// rect.x = (sdl2::SDL_GetTicks(): int)/100;
+		// sdl2::SDL_SetRenderDrawColor(render, 255, 0, 0, 0)!;
+		// sdl2::SDL_RenderFillRect(render, &rect)!;
+
+		// sdl2::SDL_RenderPresent(render);
+		// sdl2::SDL_Delay(1000 / 60);
+	};
+
+
+
+
+};
diff --git a/main.lua b/main.lua
new file mode 100644
index 0000000..b03306a
--- /dev/null
+++ b/main.lua
@@ -0,0 +1,55 @@
+local L = love
+local G = L.graphics
+
+local R = 10
+
+local canv
+function L.load()
+	canv = G.newCanvas()
+	canv:renderTo(function()
+		G.clear(1,1,1)
+	end)
+	G.setLineWidth(R)
+end
+
+local T = 0
+function L.update(dt)
+	T = T + dt
+end
+
+
+local function line_between(x0,y0,x1,y1)
+	canv:renderTo(function()
+		G.line(x0,y0,x1,y1)
+	end)
+end
+local function circle(x,y)
+	canv:renderTo(function()
+		G.circle('fill',x,y,R/2)
+	end)
+end
+
+
+local last = nil
+function L.draw()
+	G.setColor(0,0,0)
+	local x,y = L.mouse.getPosition()
+	if L.mouse.isDown(1) then
+		if last == nil then
+			circle(x,y)
+			last = {x,y}
+		else
+			circle(x,y)
+			line_between(last[1],last[2],x,y)
+			last[1],last[2] = x,y
+		end
+	elseif last ~= nil then
+		circle(x,y)
+		line_between(last[1],last[2],x,y)
+		last=nil
+	end
+
+	G.setColor(1,1,1)
+	G.draw(canv)
+
+end
diff --git a/spec b/spec
new file mode 100644
index 0000000..eef1146
--- /dev/null
+++ b/spec
@@ -0,0 +1,8 @@
+program where you can draw with the mouse
+program where you can draw with the mouse and it draws lines between the points
+program where you can draw with the mouse and it interpolates nicely with beziers
+program where you can do that multiplayerly
+	hard!
+program where you can switch between drawing and moving around
+program where you can do that and also see each other's positions
+
-- 
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