ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /os/ipaq1110/tstdraw.b/
implement Test;
include "sys.m";
include "draw.m";
Test: module
{
init: fn(ctxt: ref Draw->Context, argv: list of string);
};
init(ctxt: ref Draw->Context, nil: list of string)
{
sys := load Sys Sys->PATH;
draw := load Draw Draw->PATH;
Display, Font, Rect, Point, Image, Screen: import draw;
#
# Set up connection to display, or use the existing one
# if provided.
#
display: ref Display;
disp: ref Image;
if (ctxt == nil) {
display = draw->Display.allocate(nil);
disp = display.image;
} else {
display = ctxt.display;
disp = ctxt.screen.newwindow(display.image.r, Draw->White);
}
#
# Initialize colours.
#
red := display.color(Draw->Red);
blue := display.color(Draw->Blue);
white := display.color(Draw->White);
yellow := display.color(Draw->Yellow);
ones := display.ones;
#
# Paint the screen red.
#
disp.draw(disp.r, red, ones, disp.r.min);
sys->sleep(5000);
#
# Texture a region with rectangular tiles.
#
texture := display.newimage(((0,0),(2,3)), disp.ldepth, 1, 0);
texture.clipr = ((-10000,-10000),(10000,10000));
# put something in the texture
texture.draw(((0,0),(1,3)), blue, ones, (0,0));
texture.draw(((0,0),(2, 1)), blue, ones, (0,0));
# use texture as both source and mask to let
# destination colour show through
disp.draw(((100,100),(200,200)), texture, texture, (0,0));
sys->sleep(5000);
#
# White-out a quarter of the pixels in a region,
# to make the region appear shaded.
#
stipple := display.newimage(((0,0),(2,2)), disp.ldepth, 1, 0);
stipple.draw(((0,0),(1,1)), ones, ones, (0,0));
disp.draw(((100,100),(300,200)), white, stipple, (0,0));
sys->sleep(5000);
#
# Draw textured characters.
#
font := Font.open(display, "*default*");
disp.text((100,210), texture, (0,0), font, "Hello world");
sys->sleep(5000);
#
# Draw picture in elliptical frame.
#
delight := display.open("/icons/delight.bit");
piccenter := delight.r.min.add(delight.r.max).div(2);
disp.fillellipse((200,100), 150, 50, delight, piccenter);
disp.ellipse((200,100), 150, 50, 3, yellow, (0,0));
sys->sleep(5000);
#
# Draw a parabolic brush stroke using an elliptical brush
# to reveal more of the picture, consistent with what's
# already visible.
#
dx : con 15;
dy : con 3;
brush := display.newimage(((0,0),(2*dx+1,2*dy+1)), disp.ldepth,
0, 0);
brush.fillellipse((dx,dy), dx, dy, ones, (0,0));
for(x:=delight.r.min.x; x<delight.r.max.x; x++){
y := (x-piccenter.x)*(x-piccenter.x)/80;
y += 2*dy+1; # so whole brush is visible at top
xx := x+(200-piccenter.x)-dx;
yy := y+(100-piccenter.y)-dy;
disp.gendraw(((xx,yy),(xx+2*dx+1,yy+2*dy+1)),
delight, (x-dx, y-dy), brush, (0,0));
}
for (i := 0; i < 500; i++) {
disp.draw(disp.r, disp, ones, (0, 10));
sys->sleep(5);
}
}