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Upload mipmap texture using PBO ...

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Hello, I'm using PBO to upload mipmap 2D texture array to GPU. For my convenience (less time consuming in my algorithm), i'd like to upload my textures as follow : forall zOffset {   forall mipmapLevel {     int Size = width*height*3;     GLfloat* mytex = new GLfloat[Size];     initTexture(mytex,mipmapLevel,zOffset);     glBindBuffer( GL_PIXEL_UNPACK_BUFFER_ARB, aBuf );     glBufferData( GL_PIXEL_UNPACK_BUFFER_ARB,       Size*sizeof(float), NULL,       GL_STREAM_DRAW );     void* pbomem = glMapBuffer( GL_PIXEL_UNPACK_BUFFER_ARB,       GL_WRITE_ONLY );     memcpy( pbomem, mytex, Size*sizeof(float) );     glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER_ARB);     glTexSubImage3D( GL_TEXTURE_2D_ARRAY_EXT,       mipmapLevel, 0, 0, zOffset,       width, height, 1,       GL_RGB, GL_FLOAT, 0);     glBindBuffer( GL_PIXEL_UNPACK_BUFFER_ARB, 0 );   } } However, it is not possible to use PBO as is ... So, just change the loop with : forall mipmapLevel {   forall zOffset {     ...   } } and it works fine ! So, i'd like to know if it is possible to upload as in the first version : loop on zOffset then loop on mipmap. Maybe PBO on mipmap sequentially is avoid ! I execute my code on 8800GTX with lastest linux driver. If someone have any idea ? Thanks a lot ! -- djedge

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