qimage copy函数怎么使用

qimage copy函数怎么使用

虽然我很聪明，但这么说真的难到我了

举个小例子： #include "qqlevel.h" QQLevel::QQLevel(QWidget *parent) : QWidget(parent) { setFixedSize(300, 200); level_button = new QPushButton(); grade_button = new QPushButton(); //分别获取0-9数字图标 QPixmap pixmap_0 = getPixmap(QString(":/level/level_value"), 10, 0); QPixmap pixmap_1 = getPixmap(QString(":/level/level_value"), 10, 1); QPixmap pixmap_2 = getPixmap(QString(":/level/level_value"), 10, 2); QPixmap pixmap_3 = getPixmap(QString(":/level/level_value"), 10, 3); QPixmap pixmap_4 = getPixmap(QString(":/level/level_value"), 10, 4); QPixmap pixmap_5 = getPixmap(QString(":/level/level_value"), 10, 5); QPixmap pixmap_6 = getPixmap(QString(":/level/level_value"), 10, 6); QPixmap pixmap_7 = getPixmap(QString(":/level/level_value"), 10, 7); QPixmap pixmap_8 = getPixmap(QString(":/level/level_value"), 10, 8); QPixmap pixmap_9 = getPixmap(QString(":/level/level_value"), 10, 9); int count = 3; int pixmap_width = pixmap_8.width(); int pixmap_height = pixmap_8.height(); //最前面LV图标 QPixmap pixmap_lv(":/level/lv"); int lv_width = pixmap_lv.width(); QPixmap total_pixmap(QSize(pixmap_width*count + lv_width, pixmap_height)); QPainter painter(&total_pixmap); //绘制LV图标 painter.drawPixmap(QRect(0, 0, lv_width, pixmap_height), pixmap_lv); //再绘制LV888图标 for(int i=0; i { painter.drawPixmap(QRect(lv_width+pixmap_width*i, 0, pixmap_width, pixmap_height), pixmap_8); } level_button->setFixedHeight(30); level_button->setIcon(total_pixmap); level_button->setIconSize(total_pixmap.size()); //分别获取皇冠、太阳、月亮、星星、...等图标 QPixmap pixmap_grade_0 = getPixmap(QString(":/level/grade"), 5, 0); QPixmap pixmap_grade_1 = getPixmap(QString(":/level/grade"), 5, 1); QPixmap pixmap_grade_2 = getPixmap(QString(":/level/grade"), 5, 2); QPixmap pixmap_grade_3 = getPixmap(QString(":/level/grade"), 5, 3); QPixmap pixmap_grade_4 = getPixmap(QString(":/level/grade"), 5, 4); //绘制5个皇冠 int grade_count = 5; int pixmap_grade_width = pixmap_grade_0.width(); int pixmap_grade_height = pixmap_grade_0.height(); QPixmap total_grade_pixmap(QSize(pixmap_grade_width*grade_count, pixmap_grade_height)); QPainter grade_painter(&total_grade_pixmap); for(int i=0; i { grade_painter.drawPixmap(QRect(pixmap_grade_width*i, 0, pixmap_grade_width, pixmap_grade_height), pixmap_grade_0); } grade_button->setFixedHeight(30); grade_button->setIcon(total_grade_pixmap); grade_button->setIconSize(total_grade_pixmap.size()); QVBoxLayout *main_layout = new QVBoxLayout(); main_layout->addStretch(); main_layout->addWidget(level_button); main_layout->addWidget(grade_button); main_layout->addStretch(); main_layout->setSpacing(20); main_layout->setContentsMargins(0, 0, 0, 0); setLayout(main_layout); } QQLevel::~QQLevel() { } QPixmap QQLevel::getPixmap(QString pixmap_name, int count, int index) { QPixmap final_pixmap; if(!pixmap_name.isEmpty() && count > 0) { QPixmap pixmap(pixmap_name); int pixmap_width = pixmap.width()/count; int pixmap_height = pixmap.height(); final_pixmap = pixmap.copy(pixmap_width*index, 0, pixmap_width, pixmap_height); } return final_pixmap; } 合并过程中有可能会出现背景变色，稍作处理即可！ QImage pixmap(QSize(this->width()*WINDOW_PAGE_COUNT, WINDOW_HEIGHT), QImage::Format_ARGB32_Premultiplied); QPainter painter(&pixmap); painter.setRenderHint(QPainter::Antialiasing, true); painter.setCompositionMode(QPainter::CompositionMode_Source); painter.fillRect(pixmap.rect(), Qt::transparent); painter.setCompositionMode(QPainter::CompositionMode_SourceOver); for(int i = 0; i < WINDOW_PAGE_COUNT; i++) {    painter.drawImage(QRect(WINDOW_WIDTH*i, 0, WINDOW_WIDTH, WINDOW_HEIGHT),    QImage(QString(":/newCharacter/newFeature_%1").arg(i))); } total_label = new QLabel(this); total_label->resize(pixmap.size()); total_label->setPixmap(QPixmap::fromImage(pixmap)); total_label->move(WINDOW_START_X, WINDOW_START_Y);