MaxwellToGL: Added a TODO and partial implementation of maxwell wrap mode 4 (Clamp, GL_CLAMP).
This clamp mode was removed from OpenGL as of 3.1, we can emulate it by using GL_CLAMP_TO_BORDER to get the border color of the texture, and then manually sampling the edge to mix them in the fragment shader.
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@ -74,6 +74,11 @@ inline GLenum WrapMode(Tegra::Texture::WrapMode wrap_mode) {
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switch (wrap_mode) {
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case Tegra::Texture::WrapMode::ClampToEdge:
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return GL_CLAMP_TO_EDGE;
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case Tegra::Texture::WrapMode::ClampOGL:
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// TODO(Subv): GL_CLAMP was removed as of OpenGL 3.1, to implement GL_CLAMP, we can use
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// GL_CLAMP_TO_BORDER to get the border color of the texture, and then sample the edge to
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// manually mix them. However the shader part of this is not yet implemented.
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return GL_CLAMP_TO_BORDER;
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}
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LOG_CRITICAL(Render_OpenGL, "Unimplemented texture wrap mode=%u", static_cast<u32>(wrap_mode));
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UNREACHABLE();
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