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  4. QPixmap::loadFromData(const uchar *, len, const char * format) failing
Forum Updated to NodeBB v4.3 + New Features

QPixmap::loadFromData(const uchar *, len, const char * format) failing

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  • A Offline
    A Offline
    Ankit.Jain
    wrote on last edited by Ankit.Jain
    #1

    Hi,

    I am trying to load an image from data. When I run my code separately [different program], the images are loaded. But when I run the same on a different program, it fails. Considering that the input is same [qt versions differ in the programs, its working on 5.9, but failing on 5.6.2], what might be the reason for the failure?

    Sample Data:

    static const unsigned char image0_data[] = {
        0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
        0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x16,
        0x08, 0x06, 0x00, 0x00, 0x00, 0xc4, 0xb4, 0x6c, 0x3b, 0x00, 0x00, 0x04,
        0xb6, 0x49, 0x44, 0x41, 0x54, 0x18, 0x95, 0x85, 0x95, 0x4d, 0x6c, 0x1b,
        0x45, 0x14, 0xc7, 0x7f, 0x33, 0xbb, 0xb3, 0xb6, 0xd7, 0xb1, 0xe3, 0x7c,
        0x35, 0x04, 0xa8, 0x1b, 0x40, 0x7c, 0x96, 0x42, 0xe5, 0x00, 0x55, 0x91,
        0x40, 0x08, 0x04, 0x55, 0x69, 0x8b, 0x10, 0x20, 0x84, 0x00, 0x71, 0x2b,
        0x6a, 0x6f, 0xdc, 0xe0, 0xc6, 0x05, 0xa9, 0x17, 0xae, 0xa8, 0x87, 0x45,
        0x5c, 0x11, 0x22, 0x82, 0x03, 0x87, 0x22, 0x8a, 0x10, 0xa2, 0x04, 0x04,
        0x14, 0x57, 0xe9, 0x07, 0xa5, 0xa5, 0x4d, 0xe9, 0x87, 0x48, 0x62, 0x27,
        0x8e, 0xd7, 0x5f, 0xbb, 0xf6, 0xee, 0xce, 0x70, 0x70, 0x9b, 0x12, 0x68,
        0xcb, 0x93, 0xe6, 0x30, 0x33, 0x6f, 0x7e, 0xf3, 0x9f, 0x37, 0x6f, 0xde,
        0x08, 0x6e, 0x60, 0xa5, 0xbd, 0xb3, 0x0a, 0xcc, 0x18, 0xe8, 0x09, 0x8c,
        0x71, 0xc1, 0x00, 0x26, 0xc0, 0xe8, 0x05, 0xa5, 0x1b, 0x95, 0x9f, 0xbc,
        0xa7, 0x7b, 0xd7, 0x5b, 0x2b, 0x6e, 0x00, 0xdd, 0x0a, 0xbc, 0x0c, 0x66,
        0x33, 0x82, 0x22, 0x42, 0x65, 0x01, 0xd0, 0xdd, 0x0e, 0x26, 0xb9, 0x08,
        0xcc, 0x0a, 0x1d, 0x4f, 0x97, 0xcc, 0x47, 0x33, 0x9e, 0xe7, 0x25, 0xff,
        0x0b, 0x2e, 0xed, 0x9d, 0xbd, 0x03, 0xc4, 0x5b, 0x58, 0xea, 0xd5, 0x81,
        0xac, 0x5b, 0xb8, 0x69, 0x34, 0x2f, 0xc7, 0x47, 0xd2, 0xdc, 0x3d, 0xda,
        0x24, 0xa3, 0x12, 0xce, 0xd6, 0x06, 0xf8, 0xb3, 0xa2, 0x59, 0xaa, 0x56,
        0x75, 0xcd, 0x0f, 0x02, 0x1d, 0x07, 0x33, 0xca, 0xb4, 0xde, 0x7b, 0xc0,
        0x7c, 0xfc, 0xa3, 0xe7, 0x79, 0xf1, 0x35, 0xc1, 0xa5, 0xbd, 0xb3, 0x1b,
        0x40, 0xec, 0xc7, 0xc9, 0x6f, 0xdf, 0x7c, 0x7b, 0x86, 0x67, 0x1f, 0xce,
        0xb1, 0x69, 0xbd, 0x61, 0x5d, 0x41, 0x61, 0xc9, 0xbe, 0xab, 0x01, 0x56,
        0x9a, 0x31, 0x73, 0x0b, 0x11, 0x07, 0xca, 0x21, 0x87, 0x8e, 0xad, 0xd0,
        0x0b, 0x1a, 0x27, 0x53, 0xba, 0xf6, 0xf6, 0xfd, 0x66, 0xfa, 0xc0, 0x15,
        0xb8, 0xf5, 0x2f, 0xa5, 0x1f, 0x0c, 0xe4, 0xf3, 0xdb, 0x9e, 0xdb, 0x3a,
        0x28, 0xde, 0x78, 0x22, 0xc3, 0x9d, 0x13, 0x16, 0x29, 0x65, 0x11, 0x25,
        0xf0, 0xed, 0x51, 0x9f, 0xb3, 0xf3, 0x21, 0x67, 0xe7, 0x43, 0x26, 0xc7,
        0xd3, 0x8c, 0xe6, 0x6d, 0x36, 0x6d, 0x50, 0x8c, 0x0f, 0x29, 0xce, 0x55,
        0xcc, 0x68, 0x23, 0x14, 0x0f, 0x2d, 0x9b, 0xdb, 0xca, 0xdb, 0xa7, 0x32,
        0x97, 0xca, 0xe5, 0xb2, 0x59, 0x05, 0x4f, 0x3c, 0xbc, 0x67, 0x1f, 0x4e,
        0xee, 0x95, 0x1d, 0x8f, 0x14, 0xc4, 0xae, 0x29, 0x85, 0xa3, 0x24, 0xbd,
        0xd8, 0xd0, 0x8d, 0x0c, 0xbf, 0xfe, 0xd1, 0xe2, 0xf9, 0x47, 0x47, 0xb8,
        0x7f, 0x32, 0xcb, 0x3d, 0xeb, 0x33, 0x7c, 0x55, 0xae, 0x33, 0x98, 0xb5,
        0x31, 0xc6, 0x70, 0xf3, 0xb0, 0x22, 0xe7, 0x2a, 0xf1, 0xdb, 0xa5, 0x64,
        0x24, 0xec, 0x19, 0x75, 0x33, 0x47, 0x0e, 0x4e, 0x4d, 0x4d, 0x45, 0x56,
        0x5f, 0xed, 0xaf, 0x5b, 0x85, 0x95, 0xda, 0xf7, 0xe0, 0x1d, 0xf9, 0xf4,
        0xf6, 0x92, 0x42, 0x4a, 0xe8, 0x45, 0x9a, 0x30, 0xd2, 0x9c, 0xf9, 0x2b,
        0x60, 0xd7, 0x96, 0x61, 0x1c, 0x25, 0xfb, 0xb1, 0x13, 0x82, 0xfb, 0x36,
        0xb8, 0x7c, 0x7b, 0xd4, 0x27, 0x75, 0x79, 0xf3, 0xe1, 0x01, 0x49, 0xbb,
        0x67, 0x73, 0xa1, 0x1a, 0x4d, 0x56, 0x93, 0xf5, 0xb3, 0xe3, 0x9c, 0x3c,
        0x67, 0x95, 0xf6, 0x1c, 0x56, 0xc0, 0x5b, 0xb9, 0x5c, 0xee, 0xf1, 0xa7,
        0x36, 0x67, 0xc5, 0xd0, 0x00, 0x74, 0x23, 0x43, 0x18, 0x19, 0xaa, 0x7e,
        0xc4, 0xce, 0x2d, 0xc3, 0xa4, 0x1d, 0xf9, 0x9f, 0xac, 0xb9, 0xeb, 0xd6,
        0x0c, 0x3f, 0x9f, 0x6a, 0x22, 0x10, 0x84, 0x91, 0xc6, 0xb1, 0x7a, 0xcc,
        0x2d, 0x6a, 0xa7, 0x1d, 0xc6, 0x91, 0x15, 0xfb, 0x87, 0x6c, 0x60, 0x0c,
        0xd8, 0x9c, 0xcf, 0x0f, 0xca, 0x42, 0x3a, 0xa6, 0xd1, 0xbe, 0xa2, 0x0c,
        0x76, 0x3c, 0x32, 0x74, 0x4d, 0x28, 0x80, 0x6d, 0x09, 0x5e, 0x7a, 0x6c,
        0x94, 0xe9, 0x43, 0x4b, 0x7c, 0x71, 0x74, 0x80, 0x46, 0xe0, 0xd2, 0x64,
        0x40, 0x6a, 0xea, 0x1b, 0x1b, 0xa2, 0x58, 0x94, 0xc0, 0x04, 0x42, 0x16,
        0x47, 0x73, 0x82, 0xa0, 0xa7, 0xa9, 0xb7, 0x62, 0x84, 0x80, 0x6d, 0x53,
        0x05, 0x32, 0xa9, 0xfe, 0x15, 0x44, 0xb1, 0x5e, 0x03, 0x8d, 0x13, 0x83,
        0x31, 0x06, 0x80, 0x9d, 0x5b, 0x46, 0xd8, 0xf5, 0x40, 0x8b, 0xe5, 0x4e,
        0x0a, 0xec, 0x2c, 0x08, 0x6b, 0x02, 0xcb, 0x29, 0x4a, 0xc0, 0x45, 0xa6,
        0xb2, 0xae, 0x8a, 0xa8, 0xb7, 0x35, 0x8d, 0x8e, 0xe6, 0x99, 0x52, 0x81,
        0x9c, 0x6b, 0x03, 0x50, 0x6b, 0x44, 0x7c, 0x3e, 0x53, 0x5b, 0x03, 0x9e,
        0x9e, 0x69, 0x52, 0x9e, 0xeb, 0xa7, 0x6c, 0xda, 0xe9, 0x2b, 0xbf, 0x7d,
        0x5d, 0x3f, 0xfe, 0xc8, 0x54, 0x46, 0x40, 0x6e, 0xf5, 0x9c, 0x8d, 0x50,
        0xb1, 0xe8, 0x4b, 0x2a, 0x0d, 0xc9, 0xf7, 0x27, 0x3a, 0x00, 0xb4, 0x02,
        0xcd, 0xfb, 0x5f, 0x74, 0x39, 0x70, 0x3c, 0xbd, 0x06, 0x3c, 0xb7, 0x92,
        0xe7, 0xdd, 0xcf, 0x14, 0x33, 0xa7, 0xfa, 0xfd, 0xaf, 0x8f, 0xc3, 0x82,
        0x7f, 0xf5, 0x51, 0x08, 0xb4, 0xb4, 0xc1, 0x04, 0xe8, 0x6e, 0x67, 0xb1,
        0x9d, 0xa1, 0x9d, 0xa4, 0xc1, 0xc0, 0x99, 0xef, 0xe0, 0xc3, 0xef, 0x02,
        0x9a, 0x3d, 0x07, 0x63, 0x32, 0xd7, 0x8c, 0xb3, 0x1f, 0xc0, 0x3b, 0x9f,
        0x5c, 0xed, 0x0b, 0x01, 0x02, 0x03, 0x49, 0x18, 0x0a, 0x13, 0x77, 0x6d,
        0x8c, 0x5e, 0x00, 0x2e, 0xfa, 0x1d, 0x7d, 0x5b, 0x22, 0x32, 0x6b, 0x16,
        0x1b, 0xe4, 0x0d, 0xaa, 0xc9, 0x55, 0xb3, 0x2d, 0x90, 0x40, 0x2b, 0xe8,
        0x82, 0x49, 0x2a, 0x52, 0xb7, 0x17, 0xa4, 0xd2, 0x8d, 0x0a, 0x30, 0x4b,
        0xb7, 0xa6, 0x95, 0x65, 0x70, 0xfe, 0xd1, 0x52, 0x56, 0x02, 0xc6, 0x70,
        0xf9, 0x9e, 0xd6, 0x98, 0xb2, 0x34, 0xae, 0x4a, 0x70, 0x55, 0x42, 0xda,
        0x4e, 0x70, 0xec, 0x04, 0xd1, 0x5b, 0xd6, 0x36, 0xe1, 0xe9, 0x82, 0x39,
        0x3f, 0x6f, 0xff, 0xe4, 0x3d, 0xdd, 0x9b, 0x7a, 0xf3, 0xc7, 0xe9, 0xa4,
        0xeb, 0xbf, 0xae, 0x92, 0xcc, 0xd0, 0x50, 0xce, 0x59, 0x23, 0x52, 0x1b,
        0x70, 0x1d, 0x01, 0xe4, 0x56, 0xc7, 0x46, 0xdd, 0x80, 0xf5, 0xf9, 0x68,
        0xd5, 0xaf, 0x5f, 0x3f, 0x7a, 0xe8, 0x70, 0xa5, 0x9d, 0x49, 0x16, 0x0f,
        0x0e, 0x5a, 0x4b, 0x35, 0x09, 0x50, 0x32, 0x1f, 0xcd, 0xe8, 0x38, 0xf8,
        0xb4, 0x59, 0xaf, 0x32, 0xe8, 0x74, 0x18, 0x73, 0x03, 0xc6, 0xb2, 0x01,
        0x63, 0x6e, 0xc0, 0x78, 0x36, 0x60, 0xd4, 0x0d, 0x58, 0x69, 0xf5, 0x2b,
        0x63, 0xd0, 0xd3, 0xd8, 0x74, 0x59, 0x97, 0xbd, 0xea, 0x33, 0xe8, 0x74,
        0x68, 0xd6, 0xab, 0xe8, 0x9e, 0xff, 0xcd, 0xdd, 0xf2, 0xeb, 0x1f, 0x80,
        0xa6, 0x05, 0x50, 0x2e, 0x97, 0xcd, 0xad, 0xa5, 0xd7, 0xe6, 0xba, 0x11,
        0xf7, 0x6a, 0x9d, 0x6c, 0xb8, 0x65, 0xc4, 0x12, 0x6e, 0x4a, 0x90, 0x52,
        0x86, 0x94, 0x32, 0xd8, 0xd2, 0x70, 0xbe, 0xd2, 0xa5, 0x15, 0x68, 0x8e,
        0x9e, 0x0b, 0x38, 0x3b, 0x1f, 0xf6, 0xe7, 0x6c, 0x83, 0x20, 0xe2, 0xf4,
        0x85, 0x86, 0x5e, 0xae, 0xf9, 0x87, 0x47, 0x92, 0x13, 0xfb, 0x0b, 0xe2,
        0xaf, 0x13, 0xab, 0x60, 0x80, 0x1d, 0x25, 0xb5, 0xbc, 0x6c, 0x8a, 0x87,
        0xfd, 0xc0, 0xde, 0xd8, 0xe8, 0xc4, 0x93, 0x39, 0x57, 0x31, 0x9c, 0xb3,
        0x71, 0x94, 0xc4, 0xb1, 0x05, 0xbd, 0xd8, 0x30, 0x5f, 0x8b, 0xa8, 0xb7,
        0x13, 0x1c, 0x5b, 0xa0, 0x2c, 0x58, 0xf2, 0x23, 0x8e, 0xcd, 0xf9, 0x2c,
        0x54, 0x1b, 0x87, 0xc7, 0xe2, 0x23, 0xfb, 0x8a, 0xb2, 0xfc, 0x0b, 0xb0,
        0xe4, 0x79, 0x5e, 0xb2, 0x0a, 0x2e, 0x97, 0xcb, 0x66, 0xfb, 0x94, 0x5b,
        0x5b, 0x36, 0x93, 0x47, 0xfc, 0xc0, 0x72, 0xab, 0x7e, 0x34, 0xd9, 0xec,
        0xc4, 0x4e, 0xda, 0x8e, 0x45, 0x36, 0x63, 0x63, 0x4b, 0x89, 0x14, 0x60,
        0x4c, 0xc2, 0xf2, 0x4a, 0x9b, 0xe3, 0x7f, 0x76, 0xf4, 0xef, 0x17, 0x9a,
        0xad, 0x7a, 0xbd, 0xf1, 0xe5, 0x48, 0x72, 0x62, 0xff, 0x65, 0x68, 0xc5,
        0xf3, 0xbc, 0x08, 0xae, 0x91, 0x4c, 0xbb, 0x77, 0xef, 0x96, 0x40, 0xf6,
        0x18, 0x2f, 0x3e, 0x19, 0xcb, 0x81, 0x17, 0x34, 0x6a, 0xa3, 0x94, 0x62,
        0x22, 0x97, 0xb1, 0x32, 0x00, 0xcd, 0x20, 0x09, 0x75, 0xa2, 0x2b, 0x36,
        0xe1, 0xe9, 0x74, 0xb2, 0x78, 0xf0, 0x72, 0x4c, 0x17, 0x81, 0xfa, 0x75,
        0x7f, 0x90, 0x7f, 0xc0, 0x05, 0xe0, 0x54, 0x92, 0xc9, 0x42, 0x43, 0x14,
        0x8b, 0x58, 0x4e, 0x51, 0x40, 0x4e, 0xa0, 0xa5, 0x30, 0x71, 0x57, 0xea,
        0xf6, 0x42, 0xc1, 0x9c, 0x9f, 0x1f, 0xb4, 0x96, 0x6a, 0x40, 0x13, 0x08,
        0x3c, 0xcf, 0x5b, 0x53, 0x50, 0xfe, 0x06, 0x92, 0x1b, 0x42, 0x64, 0xc8,
        0x47, 0x19, 0x58, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae,
        0x42, 0x60, 0x82
    };
    

    Usage method :

    image0.loadFromData(image0_data, sizeof(image0_data), "PNG")
    

    The function returns false and no image is loaded. Could someone confirm that qt 5.6.2 has some problems for loadFromData(...) ?

    jsulmJ 1 Reply Last reply
    0
    • A Ankit.Jain

      Hi,

      I am trying to load an image from data. When I run my code separately [different program], the images are loaded. But when I run the same on a different program, it fails. Considering that the input is same [qt versions differ in the programs, its working on 5.9, but failing on 5.6.2], what might be the reason for the failure?

      Sample Data:

      static const unsigned char image0_data[] = {
          0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00, 0x00, 0x0d,
          0x49, 0x48, 0x44, 0x52, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x16,
          0x08, 0x06, 0x00, 0x00, 0x00, 0xc4, 0xb4, 0x6c, 0x3b, 0x00, 0x00, 0x04,
          0xb6, 0x49, 0x44, 0x41, 0x54, 0x18, 0x95, 0x85, 0x95, 0x4d, 0x6c, 0x1b,
          0x45, 0x14, 0xc7, 0x7f, 0x33, 0xbb, 0xb3, 0xb6, 0xd7, 0xb1, 0xe3, 0x7c,
          0x35, 0x04, 0xa8, 0x1b, 0x40, 0x7c, 0x96, 0x42, 0xe5, 0x00, 0x55, 0x91,
          0x40, 0x08, 0x04, 0x55, 0x69, 0x8b, 0x10, 0x20, 0x84, 0x00, 0x71, 0x2b,
          0x6a, 0x6f, 0xdc, 0xe0, 0xc6, 0x05, 0xa9, 0x17, 0xae, 0xa8, 0x87, 0x45,
          0x5c, 0x11, 0x22, 0x82, 0x03, 0x87, 0x22, 0x8a, 0x10, 0xa2, 0x04, 0x04,
          0x14, 0x57, 0xe9, 0x07, 0xa5, 0xa5, 0x4d, 0xe9, 0x87, 0x48, 0x62, 0x27,
          0x8e, 0xd7, 0x5f, 0xbb, 0xf6, 0xee, 0xce, 0x70, 0x70, 0x9b, 0x12, 0x68,
          0xcb, 0x93, 0xe6, 0x30, 0x33, 0x6f, 0x7e, 0xf3, 0x9f, 0x37, 0x6f, 0xde,
          0x08, 0x6e, 0x60, 0xa5, 0xbd, 0xb3, 0x0a, 0xcc, 0x18, 0xe8, 0x09, 0x8c,
          0x71, 0xc1, 0x00, 0x26, 0xc0, 0xe8, 0x05, 0xa5, 0x1b, 0x95, 0x9f, 0xbc,
          0xa7, 0x7b, 0xd7, 0x5b, 0x2b, 0x6e, 0x00, 0xdd, 0x0a, 0xbc, 0x0c, 0x66,
          0x33, 0x82, 0x22, 0x42, 0x65, 0x01, 0xd0, 0xdd, 0x0e, 0x26, 0xb9, 0x08,
          0xcc, 0x0a, 0x1d, 0x4f, 0x97, 0xcc, 0x47, 0x33, 0x9e, 0xe7, 0x25, 0xff,
          0x0b, 0x2e, 0xed, 0x9d, 0xbd, 0x03, 0xc4, 0x5b, 0x58, 0xea, 0xd5, 0x81,
          0xac, 0x5b, 0xb8, 0x69, 0x34, 0x2f, 0xc7, 0x47, 0xd2, 0xdc, 0x3d, 0xda,
          0x24, 0xa3, 0x12, 0xce, 0xd6, 0x06, 0xf8, 0xb3, 0xa2, 0x59, 0xaa, 0x56,
          0x75, 0xcd, 0x0f, 0x02, 0x1d, 0x07, 0x33, 0xca, 0xb4, 0xde, 0x7b, 0xc0,
          0x7c, 0xfc, 0xa3, 0xe7, 0x79, 0xf1, 0x35, 0xc1, 0xa5, 0xbd, 0xb3, 0x1b,
          0x40, 0xec, 0xc7, 0xc9, 0x6f, 0xdf, 0x7c, 0x7b, 0x86, 0x67, 0x1f, 0xce,
          0xb1, 0x69, 0xbd, 0x61, 0x5d, 0x41, 0x61, 0xc9, 0xbe, 0xab, 0x01, 0x56,
          0x9a, 0x31, 0x73, 0x0b, 0x11, 0x07, 0xca, 0x21, 0x87, 0x8e, 0xad, 0xd0,
          0x0b, 0x1a, 0x27, 0x53, 0xba, 0xf6, 0xf6, 0xfd, 0x66, 0xfa, 0xc0, 0x15,
          0xb8, 0xf5, 0x2f, 0xa5, 0x1f, 0x0c, 0xe4, 0xf3, 0xdb, 0x9e, 0xdb, 0x3a,
          0x28, 0xde, 0x78, 0x22, 0xc3, 0x9d, 0x13, 0x16, 0x29, 0x65, 0x11, 0x25,
          0xf0, 0xed, 0x51, 0x9f, 0xb3, 0xf3, 0x21, 0x67, 0xe7, 0x43, 0x26, 0xc7,
          0xd3, 0x8c, 0xe6, 0x6d, 0x36, 0x6d, 0x50, 0x8c, 0x0f, 0x29, 0xce, 0x55,
          0xcc, 0x68, 0x23, 0x14, 0x0f, 0x2d, 0x9b, 0xdb, 0xca, 0xdb, 0xa7, 0x32,
          0x97, 0xca, 0xe5, 0xb2, 0x59, 0x05, 0x4f, 0x3c, 0xbc, 0x67, 0x1f, 0x4e,
          0xee, 0x95, 0x1d, 0x8f, 0x14, 0xc4, 0xae, 0x29, 0x85, 0xa3, 0x24, 0xbd,
          0xd8, 0xd0, 0x8d, 0x0c, 0xbf, 0xfe, 0xd1, 0xe2, 0xf9, 0x47, 0x47, 0xb8,
          0x7f, 0x32, 0xcb, 0x3d, 0xeb, 0x33, 0x7c, 0x55, 0xae, 0x33, 0x98, 0xb5,
          0x31, 0xc6, 0x70, 0xf3, 0xb0, 0x22, 0xe7, 0x2a, 0xf1, 0xdb, 0xa5, 0x64,
          0x24, 0xec, 0x19, 0x75, 0x33, 0x47, 0x0e, 0x4e, 0x4d, 0x4d, 0x45, 0x56,
          0x5f, 0xed, 0xaf, 0x5b, 0x85, 0x95, 0xda, 0xf7, 0xe0, 0x1d, 0xf9, 0xf4,
          0xf6, 0x92, 0x42, 0x4a, 0xe8, 0x45, 0x9a, 0x30, 0xd2, 0x9c, 0xf9, 0x2b,
          0x60, 0xd7, 0x96, 0x61, 0x1c, 0x25, 0xfb, 0xb1, 0x13, 0x82, 0xfb, 0x36,
          0xb8, 0x7c, 0x7b, 0xd4, 0x27, 0x75, 0x79, 0xf3, 0xe1, 0x01, 0x49, 0xbb,
          0x67, 0x73, 0xa1, 0x1a, 0x4d, 0x56, 0x93, 0xf5, 0xb3, 0xe3, 0x9c, 0x3c,
          0x67, 0x95, 0xf6, 0x1c, 0x56, 0xc0, 0x5b, 0xb9, 0x5c, 0xee, 0xf1, 0xa7,
          0x36, 0x67, 0xc5, 0xd0, 0x00, 0x74, 0x23, 0x43, 0x18, 0x19, 0xaa, 0x7e,
          0xc4, 0xce, 0x2d, 0xc3, 0xa4, 0x1d, 0xf9, 0x9f, 0xac, 0xb9, 0xeb, 0xd6,
          0x0c, 0x3f, 0x9f, 0x6a, 0x22, 0x10, 0x84, 0x91, 0xc6, 0xb1, 0x7a, 0xcc,
          0x2d, 0x6a, 0xa7, 0x1d, 0xc6, 0x91, 0x15, 0xfb, 0x87, 0x6c, 0x60, 0x0c,
          0xd8, 0x9c, 0xcf, 0x0f, 0xca, 0x42, 0x3a, 0xa6, 0xd1, 0xbe, 0xa2, 0x0c,
          0x76, 0x3c, 0x32, 0x74, 0x4d, 0x28, 0x80, 0x6d, 0x09, 0x5e, 0x7a, 0x6c,
          0x94, 0xe9, 0x43, 0x4b, 0x7c, 0x71, 0x74, 0x80, 0x46, 0xe0, 0xd2, 0x64,
          0x40, 0x6a, 0xea, 0x1b, 0x1b, 0xa2, 0x58, 0x94, 0xc0, 0x04, 0x42, 0x16,
          0x47, 0x73, 0x82, 0xa0, 0xa7, 0xa9, 0xb7, 0x62, 0x84, 0x80, 0x6d, 0x53,
          0x05, 0x32, 0xa9, 0xfe, 0x15, 0x44, 0xb1, 0x5e, 0x03, 0x8d, 0x13, 0x83,
          0x31, 0x06, 0x80, 0x9d, 0x5b, 0x46, 0xd8, 0xf5, 0x40, 0x8b, 0xe5, 0x4e,
          0x0a, 0xec, 0x2c, 0x08, 0x6b, 0x02, 0xcb, 0x29, 0x4a, 0xc0, 0x45, 0xa6,
          0xb2, 0xae, 0x8a, 0xa8, 0xb7, 0x35, 0x8d, 0x8e, 0xe6, 0x99, 0x52, 0x81,
          0x9c, 0x6b, 0x03, 0x50, 0x6b, 0x44, 0x7c, 0x3e, 0x53, 0x5b, 0x03, 0x9e,
          0x9e, 0x69, 0x52, 0x9e, 0xeb, 0xa7, 0x6c, 0xda, 0xe9, 0x2b, 0xbf, 0x7d,
          0x5d, 0x3f, 0xfe, 0xc8, 0x54, 0x46, 0x40, 0x6e, 0xf5, 0x9c, 0x8d, 0x50,
          0xb1, 0xe8, 0x4b, 0x2a, 0x0d, 0xc9, 0xf7, 0x27, 0x3a, 0x00, 0xb4, 0x02,
          0xcd, 0xfb, 0x5f, 0x74, 0x39, 0x70, 0x3c, 0xbd, 0x06, 0x3c, 0xb7, 0x92,
          0xe7, 0xdd, 0xcf, 0x14, 0x33, 0xa7, 0xfa, 0xfd, 0xaf, 0x8f, 0xc3, 0x82,
          0x7f, 0xf5, 0x51, 0x08, 0xb4, 0xb4, 0xc1, 0x04, 0xe8, 0x6e, 0x67, 0xb1,
          0x9d, 0xa1, 0x9d, 0xa4, 0xc1, 0xc0, 0x99, 0xef, 0xe0, 0xc3, 0xef, 0x02,
          0x9a, 0x3d, 0x07, 0x63, 0x32, 0xd7, 0x8c, 0xb3, 0x1f, 0xc0, 0x3b, 0x9f,
          0x5c, 0xed, 0x0b, 0x01, 0x02, 0x03, 0x49, 0x18, 0x0a, 0x13, 0x77, 0x6d,
          0x8c, 0x5e, 0x00, 0x2e, 0xfa, 0x1d, 0x7d, 0x5b, 0x22, 0x32, 0x6b, 0x16,
          0x1b, 0xe4, 0x0d, 0xaa, 0xc9, 0x55, 0xb3, 0x2d, 0x90, 0x40, 0x2b, 0xe8,
          0x82, 0x49, 0x2a, 0x52, 0xb7, 0x17, 0xa4, 0xd2, 0x8d, 0x0a, 0x30, 0x4b,
          0xb7, 0xa6, 0x95, 0x65, 0x70, 0xfe, 0xd1, 0x52, 0x56, 0x02, 0xc6, 0x70,
          0xf9, 0x9e, 0xd6, 0x98, 0xb2, 0x34, 0xae, 0x4a, 0x70, 0x55, 0x42, 0xda,
          0x4e, 0x70, 0xec, 0x04, 0xd1, 0x5b, 0xd6, 0x36, 0xe1, 0xe9, 0x82, 0x39,
          0x3f, 0x6f, 0xff, 0xe4, 0x3d, 0xdd, 0x9b, 0x7a, 0xf3, 0xc7, 0xe9, 0xa4,
          0xeb, 0xbf, 0xae, 0x92, 0xcc, 0xd0, 0x50, 0xce, 0x59, 0x23, 0x52, 0x1b,
          0x70, 0x1d, 0x01, 0xe4, 0x56, 0xc7, 0x46, 0xdd, 0x80, 0xf5, 0xf9, 0x68,
          0xd5, 0xaf, 0x5f, 0x3f, 0x7a, 0xe8, 0x70, 0xa5, 0x9d, 0x49, 0x16, 0x0f,
          0x0e, 0x5a, 0x4b, 0x35, 0x09, 0x50, 0x32, 0x1f, 0xcd, 0xe8, 0x38, 0xf8,
          0xb4, 0x59, 0xaf, 0x32, 0xe8, 0x74, 0x18, 0x73, 0x03, 0xc6, 0xb2, 0x01,
          0x63, 0x6e, 0xc0, 0x78, 0x36, 0x60, 0xd4, 0x0d, 0x58, 0x69, 0xf5, 0x2b,
          0x63, 0xd0, 0xd3, 0xd8, 0x74, 0x59, 0x97, 0xbd, 0xea, 0x33, 0xe8, 0x74,
          0x68, 0xd6, 0xab, 0xe8, 0x9e, 0xff, 0xcd, 0xdd, 0xf2, 0xeb, 0x1f, 0x80,
          0xa6, 0x05, 0x50, 0x2e, 0x97, 0xcd, 0xad, 0xa5, 0xd7, 0xe6, 0xba, 0x11,
          0xf7, 0x6a, 0x9d, 0x6c, 0xb8, 0x65, 0xc4, 0x12, 0x6e, 0x4a, 0x90, 0x52,
          0x86, 0x94, 0x32, 0xd8, 0xd2, 0x70, 0xbe, 0xd2, 0xa5, 0x15, 0x68, 0x8e,
          0x9e, 0x0b, 0x38, 0x3b, 0x1f, 0xf6, 0xe7, 0x6c, 0x83, 0x20, 0xe2, 0xf4,
          0x85, 0x86, 0x5e, 0xae, 0xf9, 0x87, 0x47, 0x92, 0x13, 0xfb, 0x0b, 0xe2,
          0xaf, 0x13, 0xab, 0x60, 0x80, 0x1d, 0x25, 0xb5, 0xbc, 0x6c, 0x8a, 0x87,
          0xfd, 0xc0, 0xde, 0xd8, 0xe8, 0xc4, 0x93, 0x39, 0x57, 0x31, 0x9c, 0xb3,
          0x71, 0x94, 0xc4, 0xb1, 0x05, 0xbd, 0xd8, 0x30, 0x5f, 0x8b, 0xa8, 0xb7,
          0x13, 0x1c, 0x5b, 0xa0, 0x2c, 0x58, 0xf2, 0x23, 0x8e, 0xcd, 0xf9, 0x2c,
          0x54, 0x1b, 0x87, 0xc7, 0xe2, 0x23, 0xfb, 0x8a, 0xb2, 0xfc, 0x0b, 0xb0,
          0xe4, 0x79, 0x5e, 0xb2, 0x0a, 0x2e, 0x97, 0xcb, 0x66, 0xfb, 0x94, 0x5b,
          0x5b, 0x36, 0x93, 0x47, 0xfc, 0xc0, 0x72, 0xab, 0x7e, 0x34, 0xd9, 0xec,
          0xc4, 0x4e, 0xda, 0x8e, 0x45, 0x36, 0x63, 0x63, 0x4b, 0x89, 0x14, 0x60,
          0x4c, 0xc2, 0xf2, 0x4a, 0x9b, 0xe3, 0x7f, 0x76, 0xf4, 0xef, 0x17, 0x9a,
          0xad, 0x7a, 0xbd, 0xf1, 0xe5, 0x48, 0x72, 0x62, 0xff, 0x65, 0x68, 0xc5,
          0xf3, 0xbc, 0x08, 0xae, 0x91, 0x4c, 0xbb, 0x77, 0xef, 0x96, 0x40, 0xf6,
          0x18, 0x2f, 0x3e, 0x19, 0xcb, 0x81, 0x17, 0x34, 0x6a, 0xa3, 0x94, 0x62,
          0x22, 0x97, 0xb1, 0x32, 0x00, 0xcd, 0x20, 0x09, 0x75, 0xa2, 0x2b, 0x36,
          0xe1, 0xe9, 0x74, 0xb2, 0x78, 0xf0, 0x72, 0x4c, 0x17, 0x81, 0xfa, 0x75,
          0x7f, 0x90, 0x7f, 0xc0, 0x05, 0xe0, 0x54, 0x92, 0xc9, 0x42, 0x43, 0x14,
          0x8b, 0x58, 0x4e, 0x51, 0x40, 0x4e, 0xa0, 0xa5, 0x30, 0x71, 0x57, 0xea,
          0xf6, 0x42, 0xc1, 0x9c, 0x9f, 0x1f, 0xb4, 0x96, 0x6a, 0x40, 0x13, 0x08,
          0x3c, 0xcf, 0x5b, 0x53, 0x50, 0xfe, 0x06, 0x92, 0x1b, 0x42, 0x64, 0xc8,
          0x47, 0x19, 0x58, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, 0x44, 0xae,
          0x42, 0x60, 0x82
      };
      

      Usage method :

      image0.loadFromData(image0_data, sizeof(image0_data), "PNG")
      

      The function returns false and no image is loaded. Could someone confirm that qt 5.6.2 has some problems for loadFromData(...) ?

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @Ankit.Jain Can you load PNG files with Qt 5.6.2 in general? Maybe PNG plug-in is missing?

      https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      0
      • J.HilkJ Offline
        J.HilkJ Offline
        J.Hilk
        Moderators
        wrote on last edited by
        #3

        I have it somewhere in my mind, that the char array needs to have an even number of bytes to be loaded in a Pixmap.
        I might be totally wrong here, but that char array at least has an uneven number of Bytes in it.


        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


        Q: What's that?
        A: It's blue light.
        Q: What does it do?
        A: It turns blue.

        A 1 Reply Last reply
        0
        • J.HilkJ J.Hilk

          I have it somewhere in my mind, that the char array needs to have an even number of bytes to be loaded in a Pixmap.
          I might be totally wrong here, but that char array at least has an uneven number of Bytes in it.

          A Offline
          A Offline
          Ankit.Jain
          wrote on last edited by
          #4

          @J.Hilk Like I said, previously, 5.9 [and 5.10] are able to convert the data to an image. Hence I'll reject that option for the time being.

          @jsulm I am not aware of any plug-in requirements for PNG, might I be suggested how to check. Also, I don't know about 5.6.2, but 4.8 and 5.9+ seem to be able to convert the data to an image (the bug has been there since we updated from 4.8 to 5.6.2).

          jsulmJ 1 Reply Last reply
          0
          • A Ankit.Jain

            @J.Hilk Like I said, previously, 5.9 [and 5.10] are able to convert the data to an image. Hence I'll reject that option for the time being.

            @jsulm I am not aware of any plug-in requirements for PNG, might I be suggested how to check. Also, I don't know about 5.6.2, but 4.8 and 5.9+ seem to be able to convert the data to an image (the bug has been there since we updated from 4.8 to 5.6.2).

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #5

            @Ankit.Jain said in QPixmap::loadFromData(const uchar *, len, const char * format) failing:

            might I be suggested how to check

            Simply try to load a PNG image in your app (from a file).

            https://forum.qt.io/topic/113070/qt-code-of-conduct

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