c++ - 创建GL_TEXTURE_2D_ARRAY后违反访问

Question

在此纹理初始化之后，每一次gl调用都会遇到访问冲突(实际上最后一个GLCALL(glBindTexture(m_Target, bound));也会导致访问冲突，因此顶部的代码可能是导致访问冲突的原因):

Texture2D::Texture2D(unsigned int format, unsigned int width, unsigned int height, unsigned int unit, unsigned int mimapLevels, unsigned int layers)
        : Texture(GL_TEXTURE_2D_ARRAY, unit)
    {
        unsigned int internalFormat;
        if (format == GL_DEPTH_COMPONENT)
        {
            internalFormat = GL_DEPTH_COMPONENT32;
        }
        else
        {
            internalFormat = format;
        }
        m_Format = format;
        m_Width = width;
        m_Height = height;
        unsigned int bound = 0;
        glGetIntegerv(GL_TEXTURE_BINDING_2D_ARRAY, (int*)&bound);
        GLCALL(glGenTextures(1, &m_ID));
        GLCALL(glActiveTexture(GL_TEXTURE0 + m_Unit));
        GLCALL(glBindTexture(m_Target, m_ID));
        GLCALL(glTexParameteri(m_Target, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
        GLCALL(glTexParameteri(m_Target, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
        GLCALL(glTexStorage3D(m_Target, mimapLevels, internalFormat, width, height, layers));
        for (size_t i = 0; i < layers; i++)
        {
            glTexSubImage3D(m_Target, 0, 0, 0, i, m_Width, m_Height, 1, m_Format, s_FormatTypeMap[internalFormat], NULL);
        }
        GLCALL(glBindTexture(m_Target, bound));
    }

OGL指针在程序开始时很高兴地初始化:

        if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
        {
            std::cout << "Failed to initialize GLAD" << std::endl;
            return -1;
        }

而且这仅发生在 GL_TEXTURE_2D_ARRAY上，即使这是我的代码的第一行(类(class)初始化之后)，例如代码:

auto t = Texture2D(GL_DEPTH_COMPONENT, 1024, 1024, 10, 1, 4);

知道是什么原因造成的吗？

提前致谢!

Answer 1

您正在为NULL的最后一个参数传递glTexSubImage3D，但是OpenGL不允许这样做:

TexSubImage*D and TextureSubImage*D arguments width, height, depth, format, type, and data match the corresponding arguments to the corresponding TexImage*D command (where those arguments exist), meaning that they accept the same values, and have the same meanings. The exception is that a NULL data pointer does not represent unspecified image contents.

...并且没有允许 NULL指针的文本，因此您不能传递 NULL。

目前尚不清楚您想要通过这些 glTexSubImage3D调用实现什么。由于您使用的是不变纹理( glTexStorage3D)，因此您无需执行任何其他操作。相反，如果您要清除纹理，则可以使用 glClearTexSubImage，而 确实接受NULL作为数据，表示“用零清除”。