/usr/share/openmsx/shaders/scale2x.vert is in openmsx-data 0.10.0-1ubuntu1.
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 15 16 17 18 19 20 | uniform vec2 texSize;
varying vec2 texStep; // could be uniform
varying vec2 coord2pi;
varying vec2 videoCoord;
float pi = 4.0 * atan(1.0);
float pi2 = 2.0 * pi;
void main()
{
gl_Position = ftransform();
gl_TexCoord[0] = gl_MultiTexCoord0;
coord2pi = gl_MultiTexCoord0.st * texSize * pi2;
texStep = 1.0 / texSize;
#if SUPERIMPOSE
videoCoord = gl_MultiTexCoord1.st;
#endif
}
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