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LibGL: Implement glTexEnvf

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This controls how fetched texels are combined with the color that was
produced by a preceding texture unit or with the vertex color if it is
the first texture unit.

Currently only a small subset of possible combine modes is implemented
as required by glquake.
This commit is contained in:
Stephan Unverwerth 2021-08-21 13:59:13 +02:00 • committed by Andreas Kling
parent 19a08ff187
commit b54573739c
7 changed files with 66 additions and 7 deletions
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4
Userland/Libraries/LibGL/Tex/TextureUnit.h
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@ -24,10 +24,14 @@ public:
GLenum currently_bound_target() const { return m_currently_bound_target; }
bool is_bound() const { return !m_currently_bound_texture.is_null(); }
void set_env_mode(GLenum mode) { m_env_mode = mode; }
GLenum env_mode() const { return m_env_mode; }
private:
mutable RefPtr<Texture2D> m_texture_target_2d { nullptr };
mutable RefPtr<Texture> m_currently_bound_texture { nullptr };
GLenum m_currently_bound_target;
GLenum m_env_mode { GL_MODULATE };
};
}