QImage的用法

void argb_to_rgba( )

{

    QImage image=QImage(QFileDialog::getOpenFileName());

    image=image.rgbSwapped();

    QFile file("yvhvv.vv");

    if(!file.open(QIODevice::WriteOnly)){

        QMessageBox::critical(this,windowTitle(),tr("文件創建失敗!"));

        return;}

    QDataStream out(&file);

    out.setByteOrder(QDataStream::LittleEndian);

    GLenum vvType=GL_UNSIGNED_BYTE;

    GLenum vvFormat=GL_RGBA;

    GLsizei image_height=image.height();

    GLsizei image_width=image.width();

    GLuint magic=0x76760000;

   out<<magic<<image_width<<image_height<<vvFormat<<vvType;

 

     QVector<QRgb> PixelPond;

     for(int i=image_height-1; i>-1; --i)

     {

         for(int j=0; j<image_width; ++j)

         {

             QRgb temp=image.pixel(j,i);

             PixelPond.push_back(temp);

         }

     }

     out<<PixelPond;

/*

         QVector<uchar> PixelPond;

         for(int i=image_height; i>0; --i)

         {

             uchar *p=image.scanLine(i);

             uchar *pp=p;

             for(int j=0; j<image_width; ++j)

             {

                 PixelPond.push_back(*pp);

                 PixelPond.push_back(*(pp+1));

                 PixelPond.push_back(*(pp+2));

                 PixelPond.push_back(*(pp+3));

                 pp+=4;

             }

         }

         out<<PixelPond;

*/

    

}

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