#include <QApplication>
#include <QImage>
#include <QPainter>
#define WIDTH (1024)
#define HEIGHT (768)
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
unsigned char *buffer = nullptr;
QImage *canvas = nullptr;
buffer = new unsigned char[WIDTH * HEIGHT * 4];
canvas = new QImage(buffer, WIDTH, HEIGHT, QImage::Format_ARGB32_Premultiplied);
canvas->fill(0xffffffff);
QRectF rectangle(0, 0, 1024, 768);
int startAngle = 30 * 16;
int spanAngle = 120 * 16;
QPainter painter(canvas);
painter.drawPie(rectangle, startAngle, spanAngle);
canvas->save("test.png", "PNG");
return a.exec();
}
임의 메로리 영역(QImage)에 QPainter를 이용하여 그리고 파일로 저장하는 예제
