[英]OpenGL texture 2d array won't render with depth > 1
下面的代碼上傳了我的紋理內存,該內存在傳遞的參數中進行了描述。 當“ vPixelData ”僅包含1個項目/紋理時,將正確渲染它,但是一旦存在2個或更多,則什么都不會顯示。
僅當vPixelData.size()大於1時,glTexSubImage3D()在調用glGetError()之后才返回GL_INVALID_OPERATION 。
/*virtual*/ uint32 HyOpenGL::AddTextureArray(uint32 uiNumColorChannels, uint32 uiWidth, uint32 uiHeight, vector<unsigned char *> &vPixelData)
{
GLenum eInternalFormat = uiNumColorChannels == 4 ? GL_RGBA8 : (uiNumColorChannels == 3 ? GL_RGB8 : GL_R8);
GLenum eFormat = uiNumColorChannels == 4 ? GL_RGBA : (uiNumColorChannels == 3 ? GL_RGB : GL_RED);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, eInternalFormat, uiWidth, uiHeight, static_cast<uint32>(vPixelData.size()), 0, eFormat, GL_UNSIGNED_BYTE, NULL);
GLuint hGLTextureArray;
glGenTextures(1, &hGLTextureArray);
//glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, hGLTextureArray);
// Create storage for the texture
glTexStorage3D(GL_TEXTURE_2D_ARRAY,
1, // Number of mipmaps
eInternalFormat, // Internal format
uiWidth, uiHeight, // width, height
static_cast<uint32>(vPixelData.size()));
for(unsigned int i = 0; i != vPixelData.size(); ++i)
{
// Write each texture into storage
glTexSubImage3D(GL_TEXTURE_2D_ARRAY,
0, // Mipmap number
0, 0, i, // xoffset, yoffset, zoffset
uiWidth, uiHeight, 1, // width, height, depth (of texture you're copying in)
eFormat, // format
GL_UNSIGNED_BYTE, // type
vPixelData[i]); // pointer to pixel data
GLenum eError = glGetError(); // Getting 'GL_INVALID_OPERATION' when > 1 texture depth. It's 'GL_NO_ERROR' otherwise
}
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
return hGLTextureArray;
}
(我當前傳遞的參數是uiNumColorChannels == 4)
(uiWidth和uiHeight均為512)
如果我使用,顯然一切正常:
glTexImage3D(GL_TEXTURE_2D_ARRAY,
0,
eFormat,
uiWidth, uiHeight,
uiNumTextures,
0,
eFormat,
GL_UNSIGNED_BYTE,
NULL);
代替:
glTexStorage3D(GL_TEXTURE_2D_ARRAY,
1, // Number of mipmaps
eInternalFormat, // Internal format
uiWidth, uiHeight, // width, height
static_cast<uint32>(vPixelData.size()));
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