Use of GLSL for vertex and fragment programs in Qt+
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We don't compile the *.glsl files because we don't want the build process of+
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Qt to require cgc from nVidia to build the fragment programs.+
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The script src/opengl/util/glsl_to_include.sh will compile a GLSL program to a file+
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that can be included in a C(++) program. The file is the output from cgc+
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quoted as a string.+
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This can be done manually by:+
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./glsl_to_include.sh radial.glsl+
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./glsl_to_include.sh conical.glsl+
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This will produce the files radial.frag and radial.glsl_quoted.+
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(and also conical.frag and conical.glsl_quoted)+
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These files are included by qpaintengine_opengl.cpp+
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