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glTexSubImage3D() with GL_TEXTURE_2D_ARRAY


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#1 rgc183   Members   -  Reputation: 159

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Posted 12 December 2012 - 11:53 AM

I am trying to use gltexsubimage3D with the cube. When i use target as GL_texture_2D_array i get some weird o/p, however same code works fine with gl_texture_3d. I am copying my code and screenshots here: texture coordinates:
GLfloat tex_coordinates[]={
		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0,

		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0,

		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0,

		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0,

		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0,

		0.0, 0.0,0.0,
		1.0, 0.0,1.0,
		1.0, 1.0,1.0,
		0.0, 1.0,0.0
};
Now, i am using 8*8*8 texture, so that i am applying 8 layers of 2D images to each face of the cube. My texture data is
for (int i=0; i<size/8; i++)
    {
	    dataRGBA[4*i]=255;
	    dataRGBA[4*i+1]=0;
	    dataRGBA[4*i+2]=0;
	    dataRGBA[4*i+3]=255;

	    sub_data[4*i]=255;
	    sub_data[4*i+1]=255;
	    sub_data[4*i+2]=255;
	    sub_data[4*i+3]=255;

    }

    for (int i=size/8; i<size/4; i++)
    {
	    dataRGBA[4*i]=0;
	    dataRGBA[4*i+1]=255;
	    dataRGBA[4*i+2]=0;
	    dataRGBA[4*i+3]=255;

	 sub_data[4*i]=128;
	    sub_data[4*i+1]=0;
	    sub_data[4*i+2]=58;
	    sub_data[4*i+3]=255;



    }
    for ( int i=size/4; i<(3*size)/8; i++)
    {
	    dataRGBA[4*i]=0;
	    dataRGBA[4*i+1]=0;
	    dataRGBA[4*i+2]=255;
	    dataRGBA[4*i+3]=255;

  sub_data[4*i]=128;
	    sub_data[4*i+1]=255;
	    sub_data[4*i+2]=58;
	    sub_data[4*i+3]=255;


    }

    for ( int i=(3*size)/8; i<(4*size)/8;i++)
    {
	    dataRGBA[4*i]=255;
	    dataRGBA[4*i+1]=0;
	    dataRGBA[4*i+2]=255;
	    dataRGBA[4*i+3]=255;


sub_data[4*i]=0;
	    sub_data[4*i+1]=0;
	    sub_data[4*i+2]=0;
	    sub_data[4*i+3]=255;


    }

   for ( int i=(4*size)/8; i<(5*size)/8;i++)
    {
	    dataRGBA[4*i]=56;
	    dataRGBA[4*i+1]=150;
	    dataRGBA[4*i+2]=255;
	    dataRGBA[4*i+3]=255;

   sub_data[4*i]=54;
	    sub_data[4*i+1]=100;
	    sub_data[4*i+2]=12;
	    sub_data[4*i+3]=255;

    }

	  for ( int i=(5*size)/8; i<(6*size)/8; i++)
    {
	    dataRGBA[4*i]=150;
	    dataRGBA[4*i+1]=255;
	    dataRGBA[4*i+2]=58;
	    dataRGBA[4*i+3]=255;

   sub_data[4*i]=56;
	    sub_data[4*i+1]=32;
	    sub_data[4*i+2]=155;
	    sub_data[4*i+3]=255;

    }

	  for ( int i=(6*size)/8; i<(7*size)/8; i++)
    {
	    dataRGBA[4*i]=150;
	    dataRGBA[4*i+1]=0;
	    dataRGBA[4*i+2]=255;
	    dataRGBA[4*i+3]=255;

sub_data[4*i]=222;
	    sub_data[4*i+1]=15;
	    sub_data[4*i+2]=155;
	    sub_data[4*i+3]=255;

    }
	  for ( int i=(7*size)/8; i<(8*size)/8; i++)
    {
	    dataRGBA[4*i]=100;
	    dataRGBA[4*i+1]=128;
	    dataRGBA[4*i+2]=58;
	    dataRGBA[4*i+3]=255;

    sub_data[4*i]=156;
	    sub_data[4*i+1]=202;
	    sub_data[4*i+2]=15;
	    sub_data[4*i+3]=255;

    }
glTexImage3D(*target11, 0, GL_RGBA, 8, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE,dataRGBA);
glTexSubImage3D(*target11,0,0, 0,0,8, 4, 8, GL_RGBA,GL_UNSIGNED_BYTE,sub_data);

glTexParameteri(*target11, GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexParameteri(*target11, GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glTexParameteri(*target11, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(*target11, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(*target11, GL_TEXTURE_WRAP_R, GL_REPEAT);
GL_TEXTURE_3D
YT8o9.png

GL_TEXTURE_2D_ARRAY
R0OUO.png

I tried changing filters. By removing subimage3D call, 2darray works fine.
code works fine when xoffset=yoffset=0 and width=height=8

Edited by rgc183, 13 December 2012 - 05:37 AM.


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