Copy depth texture

Graphics and GPU Programming Programming

Started by O-san June 11, 2009 09:10 AM

2 comments, last by O-san 14 years, 10 months ago

1,900

Author

June 11, 2009 09:10 AM

Hello! I am trying to copy a shadow map texture into another texture using glCopyTexSubImage2D but to no avail. Is it possible to copy depth data from an fbo using that function? If not, can I do it in another way? Any help appreciated.

V-man

813

June 11, 2009 10:06 AM

Yes, it works. Is the other texture a GL_DEPTH_COMPONENT format?

Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

zedz

291

June 11, 2009 01:04 PM

as V-man saiz, it should work (Ive done it FWIW)
an alternative is just to draw that depth texture into the other FBO

O-san

1,900

Author

June 11, 2009 01:38 PM

Thanks! I must be doing something wrong then.. I just have to figure it out. :)

Copy depth texture

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Copy depth texture

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