ELF>@@ATL%UH-HHH=LHH-HH=LHH]A\//VTK::System::Dec // ============================================================================ // // Program: Visualization Toolkit // Module: vtkSSAAPassFS.glsl // // Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen // All rights reserved. // See Copyright.txt or http://www.kitware.com/Copyright.htm for details. // // This software is distributed WITHOUT ANY WARRANTY; without even // the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR // PURPOSE. See the above copyright notice for more information. // // ============================================================================ // thanks to Brad Larson for posting sample code that helped get this started uniform sampler2D source; // the output of this shader //VTK::Output::Dec uniform float texelWidthOffset; uniform float texelHeightOffset; in vec2 tcoordVC; // Note that the texel offsets should be 3/8 of a pixel in the // resulting image not the source image. Also note that this // filter is meant to be run one dimension at a time. // in the equation below 1.5 corresponds to 4 texel offsets // aka 3/8 * 4 = 1.5 // sinc(x) * sinc(x/a) = (a * sin(pi * x) * sin(pi * x / a)) / (pi^2 * x^2) // Assuming a Lanczos constant of 2.0, and scaling values to max out at x = +/- 1.5 void main() { vec2 firstOffset = vec2(texelWidthOffset, texelHeightOffset); vec4 fragmentColor = texture2D(source, tcoordVC) * 0.38026; fragmentColor += texture2D(source, tcoordVC - firstOffset) * 0.27667; fragmentColor += texture2D(source, tcoordVC + firstOffset) * 0.27667; fragmentColor += texture2D(source, tcoordVC - 2.0*firstOffset) * 0.08074; fragmentColor += texture2D(source, tcoordVC + 2.0*firstOffset) * 0.08074; fragmentColor += texture2D(source, tcoordVC - 3.0*firstOffset) * -0.02612; fragmentColor += texture2D(source, tcoordVC + 3.0*firstOffset) * -0.02612; fragmentColor += texture2D(source, tcoordVC - 4.0*firstOffset) * -0.02143; fragmentColor += texture2D(source, tcoordVC + 4.0*firstOffset) * -0.02143; gl_FragData[0] = fragmentColor; } GCC: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0GNUzRx $`FHN |AB`"1S`x _GLOBAL__sub_I_vtkSSAAPassFS.cxx_ZStL8__ioinit_ZL28vtkDebugLeaksManagerInstance__dso_handle_ZNSt8ios_base4InitC1Ev_GLOBAL_OFFSET_TABLE__ZNSt8ios_base4InitD1Ev__cxa_atexit_ZN20vtkDebugLeaksManagerC1Ev_ZN20vtkDebugLeaksManagerD1Ev_Z33vtkRenderingUI_AutoInit_ConstructvvtkSSAAPassFS  $* 16 > E*P \ .symtab.strtab.shstrtab.text.data.bss.rela.text.startup.rela.init_array.rodata.str1.8.rela.data.rel.local.comment.note.GNU-stack.note.gnu.property.rela.eh_frame@!@'@1@`,@( D?@ P2(d_@0  t0,}  ( @@H h   $`