Rosetta Code

Draw pixel 2: Difference between revisions

Page Discussion

Draw pixel 2 (view source)

Revision as of 12:25, 28 November 2023

18,476 bytes added ,  5 months ago
m
→‎{{header|Wren}}: Changed to Wren S/H
(Add Factor example)
m (→‎{{header|Wren}}: Changed to Wren S/H)
 
(23 intermediate revisions by 16 users not shown)
Line 8:
::#  the position of the pixel is random
 
=={{header|Ada}}==
{{libheader|SDLAda}}
<syntaxhighlight lang="ada">with Ada.Numerics.Discrete_Random;
 
with SDL.Video.Windows.Makers;
with SDL.Video.Renderers.Makers;
with SDL.Events.Events;
 
procedure Draw_A_Pixel_2 is
 
Width : constant := 640;
Height : constant := 480;
 
use SDL.C;
subtype Width_Range is SDL.C.int range 0 .. Width - 1;
subtype Height_Range is SDL.C.int range 0 .. Height - 1;
package Random_Width is new Ada.Numerics.Discrete_Random (Width_Range);
package Random_Height is new Ada.Numerics.Discrete_Random (Height_Range);
 
Width_Gen : Random_Width.Generator;
Height_Gen : Random_Height.Generator;
Window : SDL.Video.Windows.Window;
Renderer : SDL.Video.Renderers.Renderer;
 
procedure Wait is
use type SDL.Events.Event_Types;
Event : SDL.Events.Events.Events;
begin
loop
while SDL.Events.Events.Poll (Event) loop
if Event.Common.Event_Type = SDL.Events.Quit then
return;
end if;
end loop;
delay 0.100;
end loop;
end Wait;
 
begin
if not SDL.Initialise (Flags => SDL.Enable_Screen) then
return;
end if;
Random_Width.Reset (Width_Gen);
Random_Height.Reset (Height_Gen);
 
SDL.Video.Windows.Makers.Create (Win => Window,
Title => "Draw a pixel 2",
Position => SDL.Natural_Coordinates'(X => 10, Y => 10),
Size => SDL.Positive_Sizes'(Width, Height),
Flags => 0);
SDL.Video.Renderers.Makers.Create (Renderer, Window.Get_Surface);
Renderer.Set_Draw_Colour ((0, 0, 0, 255));
Renderer.Fill (Rectangle => (0, 0, Width, Height));
Renderer.Set_Draw_Colour ((255, 255, 0, 255));
Renderer.Draw (Point => (X => Random_Width.Random (Width_Gen),
Y => Random_Height.Random (Height_Gen)));
Window.Update_Surface;
 
Wait;
Window.Finalize;
SDL.Finalise;
end Draw_A_Pixel_2;</syntaxhighlight>
 
=={{header|C}}==
Same as the [[Draw a pixelDraw_a_pixel]] task, uses the random number functions of stdlib.h to plot a random point. Requires the [http://www.cs.colorado.edu/~main/bgi/cs1300/ WinBGIm] library.
<syntaxhighlight lang="c">
<lang C>
#include<graphics.h>
#include<stdlib.h>
Line 28 ⟶ 90:
return 0;
}
</syntaxhighlight>
</lang>
=={{header|Delphi}}==
{{libheader| Windows}}
{{libheader| Messages}}
{{libheader| SysUtils}}
<syntaxhighlight lang="delphi">
program Draw_a_pixel2;
 
{$APPTYPE CONSOLE}
 
uses
Windows,
Messages,
SysUtils;
 
const
WIN_WIDTH = 640;
WIN_HEIGHT = 480;
 
var
Msg: TMSG;
LWndClass: TWndClass;
hMainHandle: HWND;
 
procedure Paint(Handle: hWnd); forward;
 
procedure ReleaseResources;
begin
PostQuitMessage(0);
end;
 
function WindowProc(hWnd, Msg: Longint; wParam: wParam; lParam: lParam): Longint; stdcall;
begin
case Msg of
WM_PAINT:
Paint(hWnd);
WM_DESTROY:
ReleaseResources;
end;
Result := DefWindowProc(hWnd, Msg, wParam, lParam);
end;
 
procedure CreateWin(W, H: Integer);
var
Title: string;
begin
LWndClass.hInstance := hInstance;
with LWndClass do
begin
lpszClassName := 'OneYellowPixel';
Style := CS_PARENTDC or CS_BYTEALIGNCLIENT;
hIcon := LoadIcon(hInstance, 'MAINICON');
lpfnWndProc := @WindowProc;
hbrBackground := COLOR_BTNFACE + 1;
hCursor := LoadCursor(0, IDC_ARROW);
end;
 
Title := Format('Draw a YELLOW pixel random position in [%d, %d] ', [WIN_WIDTH,
WIN_HEIGHT]);
 
RegisterClass(LWndClass);
hMainHandle := CreateWindow(LWndClass.lpszClassName, Pchar(Title), WS_CAPTION
or WS_MINIMIZEBOX or WS_SYSMENU or WS_VISIBLE, ((GetSystemMetrics(SM_CXSCREEN)
- W) div 2), ((GetSystemMetrics(SM_CYSCREEN) - H) div 2), W, H, 0, 0, hInstance, nil);
end;
 
procedure ShowModal;
begin
while GetMessage(Msg, 0, 0, 0) do
begin
TranslateMessage(Msg);
DispatchMessage(Msg);
end;
end;
 
procedure Paint(Handle: hWnd);
var
ps: PAINTSTRUCT;
Dc: HDC;
begin
Dc := BeginPaint(Handle, ps);
 
// Fill bg with black
FillRect(Dc, ps.rcPaint, CreateSolidBrush($0));
 
// Do the magic
SetPixel(Dc, Random(WIN_WIDTH), Random(WIN_HEIGHT), $FFFF);
 
EndPaint(Handle, ps);
end;
 
begin
Randomize;
CreateWin(WIN_WIDTH, WIN_HEIGHT);
ShowModal();
end.</syntaxhighlight>
=={{header|Factor}}==
{{works with|Factor|0.99 development release 2019-07-10}}
<syntaxhighlight lang ="factor">USING: classes.struct kernel random raylib.ffi ;
 
640 480 2dup "random yellow pixel" init-window [ random ] bi@
Line 39 ⟶ 195:
begin-drawing BLACK clear-background 2dup YELLOW draw-pixel
end-drawing
] until close-window</langsyntaxhighlight>
 
=={{header|FreeBASIC}}==
<langsyntaxhighlight lang="freebasic">' version 04-07-2018
' compile with: fbc -s console
' or: fbc -s gui
Line 63 ⟶ 219:
WindowTitle "0, 0 is top left, pixel is at " & x & ", " & y & " hit any key to end program"
Sleep
End</langsyntaxhighlight>
 
=={{header|Go}}==
<langsyntaxhighlight lang="go">package main
 
import (
Line 104 ⟶ 260:
}
}
}</langsyntaxhighlight>
 
{{out}}
Line 111 ⟶ 267:
The color of the pixel at (525, 163) is yellow
</pre>
 
=={{header|J}}==
See also [[Draw_a_pixel#J|Draw a pixel]]. Note that this pixel will be nearly invisible on most screens. There's very low contrast between yellow and white, and single pixels may be difficult to see on "modern" hardware. Remedying these visual problems would require going outside the requirements of the task. You might change the color, for example to black with <code>glrgb 0 0 0</code> and/or changing the radius to include more pixels, for example 8 with <code>glpen 8 1</code><syntaxhighlight lang="j">require 'gl2'
coinsert 'jgl2'
wd{{)n pc Rosetta closeok;cc task isidraw; set task wh 640 480;pshow}}
glpaint glpixel ?640 480 [ glpen 1 1 [ glrgb 255 255 0 [ glclear ''</syntaxhighlight>
=={{header|javascript}}==
<syntaxhighlight lang="javascript">let w = window.open("", "", "width=640,height=480");
let canvas = document.createElement("canvas");
canvas.width = 640;
canvas.height = 480;
w.document.body.appendChild(canvas);
w.document.body.style.margin = 0;
let ctx = canvas.getContext("2d");
ctx.fillStyle = "#FFFF00";
let x = Math.random() * 641;
let y = Math.random() * 481;
ctx.fillRect(x, y, 1, 1);
</syntaxhighlight>
 
=={{header|Julia}}==
<langsyntaxhighlight lang="julia">using Gtk, Graphics
 
const can = @GtkCanvas()
Line 135 ⟶ 310:
signal_connect(endit, win, :destroy)
wait(cond)
</syntaxhighlight>
</lang>
 
=={{header|Kotlin}}==
This is a variation of the [[Draw a pixel]] task and so therefore is the code to accomplish it.
<langsyntaxhighlight lang="scala">// Version 1.2.41
 
import java.awt.Color
Line 177 ⟶ 352:
}
}
}</langsyntaxhighlight>
 
{{output}}
Line 184 ⟶ 359:
The color of the pixel at (296, 15) is yellow
</pre>
 
=={{header|Nim}}==
{{libheader|SDL2}}
<syntaxhighlight lang="nim">import random
import sdl2
 
discard sdl2.init(INIT_EVERYTHING)
 
let window = createWindow("Pixel", 300, 300, 640, 480, SDL_WINDOW_SHOWN)
let renderer = createRenderer(window, -1, Renderer_Accelerated)
 
randomize()
renderer.clear()
renderer.setDrawColor((255u8, 255u8, 0u8, 0u8))
let x = rand(639)
let y = rand(479)
renderer.drawPoint(x.cint, y.cint)
renderer.present()
 
delay(5000)</syntaxhighlight>
 
=={{header|Objeck}}==
<syntaxhighlight lang="objeck">use Game.SDL2;
use Game.Framework;
 
class DrawPixel {
@framework : GameFramework;
function : Main(args : String[]) ~ Nil {
DrawPixel->New()->Run();
}
New() {
@framework := GameFramework->New(640, 480, "RGB");
@framework->SetClearColor(Color->New(0, 0, 0));
}
 
method : Run() ~ Nil {
if(@framework->IsOk()) {
e := @framework->GetEvent();
x := Int->Random(640);
y := Int->Random(480);
quit := false;
while(<>quit) {
@framework->FrameStart();
@framework->Clear();
 
# process input
while(e->Poll() <> 0) {
if(e->GetType() = EventType->SDL_QUIT) {
quit := true;
};
};
@framework->GetRenderer()->SetDrawColor(255, 255, 0, 0);
@framework->GetRenderer()->DrawPoint(x, y);
 
@framework->Show();
@framework->FrameEnd();
};
}
else {
"--- Error Initializing Game Environment ---"->ErrorLine();
return;
};
 
leaving {
@framework->Quit();
};
}
}</syntaxhighlight>
 
=={{header|Perl}}==
{{libheader|Gtk3}}
<langsyntaxhighlight lang="perl">use Gtk3 '-init';
 
my $width = 640;
Line 212 ⟶ 460:
$cr->rectangle( int rand $width , int rand $height, 1, 1);
$cr->stroke;
}</langsyntaxhighlight>
 
=={{header|Perl 6Phix}}==
{{libheader|Phix/pGUI}}
Pixel jumps around randomly, twice a second.
<!--<syntaxhighlight lang="phix">(phixonline)-->
<span style="color: #000080;font-style:italic;">--
-- demo\rosetta\Draw_pixel_2.exw
--</span>
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">pGUI</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">dlg</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">canvas</span>
<span style="color: #004080;">cdCanvas</span> <span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">redraw_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">atom</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">w</span><span style="color: #0000FF;">,</span><span style="color: #000000;">h</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupGetIntInt</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"DRAWSIZE"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasActivate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasClear</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasPixel</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">rand</span><span style="color: #0000FF;">(</span><span style="color: #000000;">w</span><span style="color: #0000FF;">),</span> <span style="color: #7060A8;">rand</span><span style="color: #0000FF;">(</span><span style="color: #000000;">h</span><span style="color: #0000FF;">),</span> <span style="color: #004600;">CD_YELLOW</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasFlush</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">map_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">cdcanvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_IUP</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">ih</span><span style="color: #0000FF;">)</span>
<span style="color: #000000;">cddbuffer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">cdCreateCanvas</span><span style="color: #0000FF;">(</span><span style="color: #004600;">CD_DBUFFER</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">cdcanvas</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">cdCanvasSetBackground</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cddbuffer</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">CD_BLACK</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_DEFAULT</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">timer_cb</span><span style="color: #0000FF;">(</span><span style="color: #004080;">Ihandle</span> <span style="color: #000080;font-style:italic;">/*ih*/</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupUpdate</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">return</span> <span style="color: #004600;">IUP_IGNORE</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #008080;">procedure</span> <span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupOpen</span><span style="color: #0000FF;">()</span>
<span style="color: #000000;">canvas</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupCanvas</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"RASTERSIZE=240x250"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetCallbacks</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #0000FF;">{</span><span style="color: #008000;">"MAP_CB"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"map_cb"</span><span style="color: #0000FF;">),</span>
<span style="color: #008000;">"ACTION"</span><span style="color: #0000FF;">,</span> <span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"redraw_cb"</span><span style="color: #0000FF;">)})</span>
<span style="color: #000000;">dlg</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupDialog</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span><span style="color: #008000;">`TITLE="Draw pixel"`</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupShow</span><span style="color: #0000FF;">(</span><span style="color: #000000;">dlg</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">IupSetAttribute</span><span style="color: #0000FF;">(</span><span style="color: #000000;">canvas</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">"RASTERSIZE"</span><span style="color: #0000FF;">,</span> <span style="color: #004600;">NULL</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">Ihandle</span> <span style="color: #000000;">timer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">IupTimer</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">Icallback</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"timer_cb"</span><span style="color: #0000FF;">),</span> <span style="color: #000000;">500</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (2 fps)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()!=</span><span style="color: #004600;">JS</span> <span style="color: #008080;">then</span>
<span style="color: #7060A8;">IupMainLoop</span><span style="color: #0000FF;">()</span>
<span style="color: #7060A8;">IupClose</span><span style="color: #0000FF;">()</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span>
<span style="color: #000000;">main</span><span style="color: #0000FF;">()</span>
<!--</syntaxhighlight>-->
 
=={{header|Processing}}==
<syntaxhighlight lang="java">
//Aamrun, 26th June 2022
 
size(640,480);
 
stroke(#ffff00);
 
ellipse(random(640),random(480),1,1);
</syntaxhighlight>
 
=={{header|Python}}==
{{works with|Python|2.7}}
{{libheader|Tkinter}}
{{libheader|random}}
<syntaxhighlight lang="python">import Tkinter,random
def draw_pixel_2 ( sizex=640,sizey=480 ):
pos = random.randint( 0,sizex-1 ),random.randint( 0,sizey-1 )
root = Tkinter.Tk()
can = Tkinter.Canvas( root,width=sizex,height=sizey,bg='black' )
can.create_rectangle( pos*2,outline='yellow' )
can.pack()
root.title('press ESCAPE to quit')
root.bind('<Escape>',lambda e : root.quit())
root.mainloop()
 
draw_pixel_2()</syntaxhighlight>
 
=={{header|Racket}}==
 
<syntaxhighlight lang="racket">#lang racket/gui
 
(define WIDTH 640)
(define HEIGHT 480)
(define COLOR (make-color 255 255 0))
(define BACKGROUND-COLOR (make-color 0 0 0))
 
(define frame (new frame%
[label "Draw Pixel"]
[width WIDTH]
[height HEIGHT]))
 
(new canvas% [parent frame]
[paint-callback
(λ (canvas dc)
(send dc set-background BACKGROUND-COLOR)
(send dc clear)
(send dc set-pen COLOR 1 'solid)
(send dc draw-point (random WIDTH) (random HEIGHT)))])
 
(send frame show #t)</syntaxhighlight>
 
=={{header|Raku}}==
(formerly Perl 6)
{{works with|Rakudo|2018.05}}
Coordinates of random pixel displayed in window title. To make the single pixel show up better I filled in the drawing area background with black to get better contrast.
 
<syntaxhighlight lang="raku" perl6line>use GTK::Simple;
use GTK::Simple::DrawingArea;
use Cairo;
Line 244 ⟶ 597:
 
my $ctx = $da.add-draw-handler( &rect-do );
$app.run;</langsyntaxhighlight>
 
=={{header|Phix}}==
{{libheader|pGUI}}
Resize the window to see the pixel jumping about.
<lang Phix>include pGUI.e
 
Ihandle dlg, canvas
cdCanvas cddbuffer, cdcanvas
 
function redraw_cb(Ihandle /*ih*/, integer /*posx*/, integer /*posy*/)
atom {w,h} = IupGetIntInt(canvas, "DRAWSIZE")
cdCanvasActivate(cddbuffer)
cdCanvasClear(cddbuffer)
cdCanvasPixel(cddbuffer, rand(w), rand(h), CD_YELLOW)
cdCanvasFlush(cddbuffer)
return IUP_DEFAULT
end function
 
function map_cb(Ihandle ih)
cdcanvas = cdCreateCanvas(CD_IUP, ih)
cddbuffer = cdCreateCanvas(CD_DBUFFER, cdcanvas)
cdCanvasSetBackground(cddbuffer, CD_BLACK)
return IUP_DEFAULT
end function
 
procedure main()
IupOpen()
 
canvas = IupCanvas(NULL)
IupSetAttribute(canvas, "RASTERSIZE", "240x50")
IupSetCallback(canvas, "MAP_CB", Icallback("map_cb"))
IupSetCallback(canvas, "ACTION", Icallback("redraw_cb"))
 
dlg = IupDialog(canvas)
IupSetAttribute(dlg, "TITLE", "Draw pixel")
IupCloseOnEscape(dlg)
 
IupShow(dlg)
IupSetAttribute(canvas, "RASTERSIZE", NULL)
IupMainLoop()
IupClose()
end procedure
 
main()</lang>
 
=={{header|Ring}}==
<syntaxhighlight lang="ring"># Project : Draw pixel 2
<lang ring>
# Project : Draw pixel 2
 
load "guilib.ring"
Line 352 ⟶ 660:
see "green : " + mycolor.green() + nl
see "blue : " + mycolor.blue() + nl
}</syntaxhighlight>
</lang>
Outputimage:
[https://www.dropbox.com/s/n31ppq8cu9ipru8/CalmoSoftPixelColor.jpg?dl=0 Draw pixel 2]
 
=={{header|Scala}}==
===Java Swing Interoperability===
{{Out}}See it yourself by running in your browser either by [https://scastie.scala-lang.org/9jfWoH2uRomUBKDBzFGzkw Scastie (remote JVM)].
{{libheader|Scala Java Swing interoperability}}
{{libheader|Scala Test provided}}
{{libheader|Scala Javanese style}}
{{libheader|Scastie qualified}}
{{works with|Scala|2.13}}
<syntaxhighlight lang="scala">import java.awt.image.BufferedImage
import java.awt.Color
import scala.language.reflectiveCalls
 
object RgbBitmap extends App {
// Even Javanese style testing is still possible.
private val img0 =
new RgbBitMap(50, 60) { // Wrappers to enable adhoc Javanese style
def getPixel(x: Int, y: Int) = this(x, y)
def setPixel(x: Int, y: Int, c: Color) = this(x, y) = c
}
 
class RgbBitMap(val dim: (Int, Int)) {
private val image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR)
 
def apply(x: Int, y: Int) = new Color(image.getRGB(x, y))
 
def update(x: Int, y: Int, c: Color) = image.setRGB(x, y, c.getRGB)
 
def fill(c: Color) = {
val g = image.getGraphics
g.setColor(c)
g.fillRect(0, 0, width, height)
}
 
def width = dim._1
def height = dim._2
}
 
private val (x,y) = (util.Random.nextInt(50), util.Random.nextInt(60))
 
img0.fill(Color.CYAN)
img0.setPixel(x, y, Color.BLUE)
// Testing in Java style
assert(img0.getPixel(x, y) == Color.BLUE)
assert(img0.width == 50)
assert(img0.height == 60)
println("Tests successfully completed with no errors found.")
 
}</syntaxhighlight>
 
=={{header|V (Vlang)}}==
<syntaxhighlight lang="Zig">
import gg
import gx
import rand
 
const (
win_width = 640
win_height = 480
x = rand.int_in_range(1, win_width) or {exit(-1)}
y = rand.int_in_range(1, win_height) or {exit(-1)}
)
 
fn main() {
mut app := gg.new_context(
width: win_width
height: win_height
frame_fn: frame
window_title: 'Pixel 2'
)
app.run()
}
 
fn frame(mut ctx gg.Context) {
ctx.begin()
ctx.draw_pixel(x, y, gx.yellow)
ctx.end()
}
</syntaxhighlight>
 
=={{header|Wren}}==
{{libheader|DOME}}
<syntaxhighlight lang="wren">import "dome" for Window
import "graphics" for Canvas, Color
import "random" for Random
 
class Game {
static init() {
Window.title = "Draw a pixel 2"
Window.resize(320, 240)
Canvas.resize(320, 240)
var yellow = Color.rgb(255, 255, 0)
var rand = Random.new()
var randX = rand.int(320)
var randY = rand.int(240)
Canvas.pset(randX, randY, yellow)
}
 
static update() {}
 
static draw(dt) {}
 
static getRGB(col) { "{%(col.r), %(col.g), %(col.b)}" }
}</syntaxhighlight>
 
=={{header|XPL0}}==
This is all that's required on the Raspberry Pi version of XPL0.
<syntaxhighlight lang="xpl0">[SetFB(640, 480, 24); Point(Ran(640), Ran(480), $FFFF00)]</syntaxhighlight>
PureFox
9,476

edits

Retrieved from "https://rosettacode.org/wiki/Special:MobileDiff/282079...353500"