我在sampler1D纹理中存储了一个1D高斯滤镜，并将其发送到片段着色器。在进行垂直和水平模糊时，我使用texelFetch（）获取samlper1D贴图中的权重，但没有工作。数据如何存储在sampler1D中？

in vec2 texCoord; 
uniform int BlurFilterWidth; 
uniform sampler1D BlurFilterTex;
uniform sampler2D OriginalImageTex;
uniform sampler2D ThresholdImageTex;
uniform sampler2D HorizBlurImageTex;
uniform sampler2D VertBlurImageTex;

layout (location = 0) out vec4 FragColor;

void HorizBlurImage()
{

    ivec2 pix = ivec2(gl_FragCoord.xy);
    int TexSize = textureSize(BlurFilterTex,0);
    vec4 sum = texelFetch(ThresholdImageTex,pix,0) * texelFetch(BlurFilterTex, 0, 0).r;

    for( int i = 1; i < BlurFilterWidth; i++){
       sum += texelFetchOffset(ThresholdImageTex, pix, 0, ivec2(i,0)) * texelFetch(BlurFilterTex, i*TexSize, 0).r;
       sum += texelFetchOffset(ThresholdImageTex, pix, 0, ivec2(-i,0)) * texelFetch(BlurFilterTex, i*TexSize, 0).r;

    }
    FragColor = sum;
}