Copy OpenGL texture from one target to another -


i have iosurface backed texture limited gl_texture_rectangle_arb , doesn't support mipmapping. i'm trying copy texture texture bound gl_texture_2d , perform mipmapping on 1 instead. i'm having problems copying texture. can't work copying gl_texture_rectangle_arb. here code:

    var arbtexture = gluint()     glgentextures(1, &arbtexture)      /* stuff fill arbtexture image data */      glenable(glenum(gl_texture_rectangle_arb))     glbindtexture(glenum(gl_texture_rectangle_arb), arbtexture)     // @ point, if return here, arbtexture draws fine      // trying copy texture (fbo , texture generated previously):     glbindframebuffer(glenum(gl_framebuffer), fbo);     glframebuffertexture2d(glenum(gl_read_framebuffer), glenum(gl_color_attachment0), glenum(gl_texture_rectangle_arb), arbtexture, 0)     glframebuffertexture2d(glenum(gl_draw_framebuffer), glenum(gl_color_attachment1), glenum(gl_texture_rectangle_arb), texture, 0)     gldrawbuffer(glenum(gl_color_attachment1))     glblitframebuffer(0, 0, glsizei(width), glsizei(height), 0, 0, glsizei(width), glsizei(height), glbitfield(gl_color_buffer_bit)         , glenum(gl_nearest))     glbindtexture(glenum(gl_texture_rectangle_arb), texture)     // @ point, texture black 

the arguments of second glframebuffertexture2d() not match description:

glframebuffertexture2d(     glenum(gl_draw_framebuffer), glenum(gl_color_attachment1),     glenum(gl_texture_rectangle_arb), texture, 0) 

since you're saying second texture gl_texture_2d, needs matched textarget argument of call. should be:

glframebuffertexture2d(     glenum(gl_draw_framebuffer), glenum(gl_color_attachment1),     glenum(gl_texture_2d), texture, 0) 

btw, gl_texture_rectangle standard in opengl 3.1 , later, there should no need use arb form.


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