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Sets a clear colour appropriate for phase-linked luminance clearing.
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@ -83,6 +83,7 @@ ScanTarget::ScanTarget(GLuint target_framebuffer, float output_gamma) :
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// write straight into it.
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glGenTextures(1, &write_area_texture_name_);
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glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
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glBlendFunc(GL_SRC_ALPHA, GL_CONSTANT_COLOR);
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glBlendColor(0.4f, 0.4f, 0.4f, 1.0f);
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