void graphicsDrawRect(JsGraphics *gfx, short x1, short y1, short x2, short y2) {
graphicsToDeviceCoordinates(gfx, &x1, &y1);
graphicsToDeviceCoordinates(gfx, &x2, &y2);
// rather than writing pixels, we use fillrect - as it is faster
graphicsFillRectDevice(gfx,x1,y1,x2,y1);
graphicsFillRectDevice(gfx,x2,y1,x2,y2);
graphicsFillRectDevice(gfx,x1,y2,x2,y2);
graphicsFillRectDevice(gfx,x1,y2,x1,y1);
}
void graphicsFillCircle(JsGraphics *gfx, short x, short y, short rad) {
graphicsToDeviceCoordinates(gfx, &x, &y);
int radY = 0;
int decisionOver2 = 1 - rad;
while (rad >= radY) {
graphicsFillRectDevice(gfx, rad + x, radY + y, -rad + x, -radY + y);
graphicsFillRectDevice(gfx, radY + x, rad + y, -radY + x, -rad + y);
graphicsFillRectDevice(gfx, -rad + x, radY + y, rad + x, -radY + y);
graphicsFillRectDevice(gfx, -radY + x, rad + y, radY + x, -rad + y);
radY++;
if (decisionOver2 <= 0){
// Change in decision criterion for radY -> radY+1
decisionOver2 += 2 * radY + 1;
}else{
rad--;
// Change for radY -> radY+1, rad -> rad-1
decisionOver2 += 2 * (radY - rad) + 1;
}
}
}
void graphicsClear(JsGraphics *gfx) {
unsigned int c = gfx->data.fgColor;
gfx->data.fgColor = gfx->data.bgColor;
graphicsFillRectDevice(gfx,0,0,(short)(gfx->data.width-1),(short)(gfx->data.height-1));
gfx->data.fgColor = c;
}
void graphicsFillRect(JsGraphics *gfx, short x1, short y1, short x2, short y2) {
graphicsToDeviceCoordinates(gfx, &x1, &y1);
graphicsToDeviceCoordinates(gfx, &x2, &y2);
graphicsFillRectDevice(gfx, x1, y1, x2, y2);
}