void update()
{
m_pImage->clear(0xff000000); // a=ff, r=00, g=00, b=00
HelloModel* pModel = m_pController->model();
m_pImage->text(g_szMessage, pModel->x(), pModel->y(), TEXT_SIZE, 0xffffff30); // a=ff, r=ff, g=ff, b=30
m_pCanvas->setImage(m_pImage);
}
// static
void GPlotWindow::stringLabel(GImage* pImage, const char* szText, int x, int y, float size, unsigned int color, double angle)
{
// Draw the label such that it ends at the center of the temp image
int width = GImage::measureTextWidth(szText, size);
int nSize = (int)(std::max((float)width, size * 12) * 2.3);
GImage tmp;
tmp.setSize(nSize, nSize);
tmp.clear(0x0);
tmp.text(szText, nSize / 2 - width, (int)((nSize - size * 12) / 2), size, color, 1000, 1000);
// Rotate the label around the center
GImage tmp2;
tmp2.rotate(&tmp, nSize / 2, nSize / 2, angle);
// Blit such that the label ends at the specified point
GRect r(0, 0, nSize, nSize);
pImage->blitAlpha(x - nSize / 2, y - nSize / 2, &tmp2, &r);
}