/usr/share/gem/examples/10.glsl/fetching.vert is in gem-doc 1:0.93.3-9build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | uniform sampler2D MyTex;
varying vec4 C;
void main()
{
vec4 v = vec4(gl_Vertex);
vec4 color = texture2D(MyTex, (gl_TextureMatrix[0] * gl_MultiTexCoord0).st);
v.z = color.r;
// v.x += (color.b-0.5)/2.;
// v.y += (color.g-0.5)/2.;
C=color;
gl_Position = gl_ModelViewProjectionMatrix * v;
}
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