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Emmanuele Bassi authored
Sub-classes of ShaderEffect currently have to get the handle for the Cogl shader and call cogl_shader_source(); this makes it awkward to implement a ShaderEffect, and it exposes handles and Cogl API that we might want to change in the future. We should provide a ClutterShaderEffect method that allows to (safely) set the shader source at the right time for sub-classes to use.
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