Question

我只是在重新安装Windows和VS 2012 Ultimate后修改代码。代码（如下所示）之前完全正常，但是当我尝试立即运行代码时，它会出现以下错误：

Error   1   error C2664: 'auxDIBImageLoadW' : cannot convert parameter 1 from 'LPSTR' to 'LPCWSTR'

代码：

void CreateTexture(GLuint textureArray[], LPSTR strFileName, int textureID)
{
    AUX_RGBImageRec *pBitmap = NULL;
    if (!strFileName)                                   // Return from the function if no file name was passed in
        return;
    pBitmap = auxDIBImageLoad(strFileName);     //<-Error in this line      // Load the bitmap and store the data

    if (pBitmap == NULL)                                    // If we can't load the file, quit!
        exit(0);

    // Generate a texture with the associative texture ID stored in the array
    glGenTextures(1, &textureArray[textureID]);

    // This sets the alignment requirements for the start of each pixel row in memory.
    //  glPixelStorei (GL_UNPACK_ALIGNMENT, 1);

    // Bind the texture to the texture arrays index and init the texture
    glBindTexture(GL_TEXTURE_2D, textureArray[textureID]);

    // Build Mipmaps (builds different versions of the picture for distances - looks better)
    gluBuild2DMipmaps(GL_TEXTURE_2D, 3, pBitmap->sizeX, pBitmap->sizeY, GL_RGB, GL_UNSIGNED_BYTE, pBitmap->data);

    // Lastly, we need to tell OpenGL the quality of our texture map.  GL_LINEAR is the smoothest.
    // GL_NEAREST is faster than GL_LINEAR, but looks blochy and pixelated.  Good for slower computers though.
    // Read more about the MIN and MAG filters at the bottom of main.cpp

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    //  glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
    //  glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);


    // Now we need to free the bitmap data that we loaded since openGL stored it as a texture

    if (pBitmap)                                        // If we loaded the bitmap
    {
        if (pBitmap->data)                              // If there is texture data
        {
            free(pBitmap->data);                        // Free the texture data, we don't need it anymore
        }

        free(pBitmap);                                  // Free the bitmap structure
    }
}

我尝试了这个Link，This one too，也尝试了this。但仍然有错误。

此函数在初始化后用作：

LPCWSTR k =L"grass.bmp";
CreateTexture(g_Texture, "building1.bmp", 0);
CreateTexture(g_Texture, "clock.bmp", 0);
//list goes on

你可以帮帮我吗？

Answer 1

将“LPSTR strFileName”更改为“LPCWSTR strFileName”，将“building1.bmp”更改为L“building1.bmp，将”clock.bmp“更改为”clock.bmp“。

始终要小心，因为LPSTR是ASCII，LPCWSTR是Unicode。因此，如果函数需要一个Unicode变量（如：L“String here”），则不能给它一个ASCII字符串。

Answer 2

解决方案是：

更改您的函数原型以获取广泛的字符串：

void CreateTexture(GLuint textureArray[], LPWSTR strFileName, int textureID)
//...
LPCWSTR k =L"grass.bmp";
CreateTexture(g_Texture, L"building1.bmp", 0);
CreateTexture(g_Texture, L"clock.bmp", 0);

或

请勿更改您的函数原型，而是调用API函数的A版本：

pBitmap = auxDIBImageLoadA(strFileName);

推荐：坚持使用宽字符串并使用正确的字符串类型。

错误C2664：＆＃39; auxDIBImageLoadW＆＃39; ：无法转换参数1来自＆＃39; LPSTR＆＃39;到LPCWSTR＆＃39;

2 个答案: