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我正在尝试渲染已映射到图形视频内存的纹理。我已经使用 qDebug 来测试我的图像的输入，实际上它拥有一个 512x512 的图像，它是 2 的幂。但是当我尝试渲染时，结果只是一个白色的四边形，而不是纹理。

注意：GLuint m_textureIdents[1]; 在 GLWidget.h 中正确定义

#include "GLWidget.h"

GLWidget::GLWidget(QWidget *parent) : QGLWidget(parent)
{
    setMouseTracking(true);
    m_sceneIndex = SinQuest::SplashScreen;
}

void GLWidget::setApplicationPath(QString strAppPath)
{
    m_strAppPath = strAppPath;
}

#include <QDebug>
void GLWidget::loadResources(void)
{
    m_imageHandler.addImage(QString(m_strAppPath).append(QDir().toNativeSeparators("\\resources\\images\\")).append("splash_logo.png"), "splash-logo");
    QImage glImageData = QGLWidget::convertToGLFormat(*m_imageHandler.getImage("splash-logo"));

    qDebug() << glImageData.width() << ":" << glImageData.height();

    m_textureIdents[0] = 0;
    glGenTextures(1, &m_textureIdents[0]);
    glBindTexture(GL_TEXTURE_2D, m_textureIdents[0]);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
    glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, glImageData.width(), glImageData.height(), 0, GL_RGB, GL_UNSIGNED_BYTE, glImageData.bits());
}

void GLWidget::initializeGL()
{
    glEnable(GL_TEXTURE_2D);
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_COLOR_MATERIAL);
    glEnable(GL_BLEND);
    glEnable(GL_POLYGON_SMOOTH);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    glClearColor(0, 0, 0, 0);
}

void GLWidget::resizeGL(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0, w, 0, h, -1.0l, 1.0l); // set up origin
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

void GLWidget::paintGL()
{
    glClearColor( 0.0f, 0.0f, 0.0f, 0.0f);
    glClear( GL_COLOR_BUFFER_BIT );
    glMatrixMode( GL_MODELVIEW );
    glLoadIdentity();

    glColor3f(1.0f, 1.0f, 1.0f);
    glShadeModel( GL_FLAT );
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, m_textureIdents[0]);

    glBegin(GL_QUADS);

    glTexCoord2f(0.0f, 0.0f);
    glVertex2i(0, 0);

    glTexCoord2f(1.0f, 0.0f);
    glVertex2i(512, 0);

    glTexCoord2f(1.0f, 1.0f);
    glVertex2i(512, 512);

    glTexCoord2f(0.0f, 1.0f);
    glVertex2i(0, 512);

    glEnd();
}

void GLWidget::mousePressEvent(QMouseEvent *event) {

}
void GLWidget::mouseMoveEvent(QMouseEvent *event) {
    printf("%d, %d\n", event->x(), event->y());
}

void GLWidget::keyPressEvent(QKeyEvent* event) {
    switch(event->key()) {
    case Qt::Key_Escape:
        close();
        break;
    default:
        event->ignore();
        break;
    }
}

...

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QDesktopWidget *pDeskWidget = app.desktop();

    // available geometry to obtain resolution for primary screen
    QRect avGeometry = pDeskWidget->availableGeometry(pDeskWidget->primaryScreen());

    // create window, set resolution and invoke fullscreen window state
    GLWidget window;
    window.setApplicationPath(QCoreApplication::applicationDirPath());
    window.loadResources();
    window.resize(avGeometry.width(), avGeometry.height());
    window.setWindowState(Qt::WindowFullScreen);
    window.show();

    return app.exec();
}
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