SetSurface
Setting RGBA pixels from the buffer to window
main.cpp
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
struct MyApp : TopWindow {
RGBA pixels[65536];
virtual void Paint(Draw& w) {
w.DrawRect(GetSize(), LtGray());
SetSurface(w, 0, 0, 256, 256, pixels);
SetSurface(w, RectC(300, 128, 128, 128), pixels, Size(256, 256), Point(0, 0));
SetSurface(w, RectC(300, 0, 128, 64), pixels, Size(256, 256), Point(128, 128));
}
MyApp() {
RGBA *t = pixels;
for(int x = 0; x < 256; x++)
for(int y = 0; y < 256; y++) {
int d = (x - 128) * (x - 128) + (y - 128) * (y - 128);
RGBA c = Black();
if(d > 120 * 120)
c = White();
if(d < 120 * 120)
c.r = 255 - min(255 * d / (120 * 120), 255);
*t++ = c;
}
}
};
GUI_APP_MAIN
{
MyApp().Run();
}
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