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LibGL: Implement glGenLists and a few friends
This commit implements glGenLists(), glNewList(), glDeleteLists(), and glCallList(). The 'compiled' records are implemented as a vector of member function pointers and tuples containing their arguments, and a mechanism is implemented to allow the recorded calls to copy-capture values from the time of the call; this is currently only used with glLoadMatrix.
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02de813950
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6 changed files with 292 additions and 2 deletions
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@ -11,6 +11,8 @@
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#include "GLStruct.h"
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#include "SoftwareRasterizer.h"
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#include <AK/RefPtr.h>
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#include <AK/Tuple.h>
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#include <AK/Variant.h>
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#include <AK/Vector.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Matrix4x4.h>
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@ -46,10 +48,34 @@ public:
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virtual void gl_disable(GLenum) override;
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virtual void gl_front_face(GLenum) override;
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virtual void gl_cull_face(GLenum) override;
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virtual GLuint gl_gen_lists(GLsizei range) override;
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virtual void gl_call_list(GLuint list) override;
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virtual void gl_delete_lists(GLuint list, GLsizei range) override;
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virtual void gl_end_list(void) override;
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virtual void gl_new_list(GLuint list, GLenum mode) override;
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virtual void present() override;
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private:
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template<typename T>
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T* store_in_listing(T value)
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{
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VERIFY(m_current_listing_index.has_value());
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auto& listing = m_current_listing_index->listing;
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listing.saved_arguments.empend(make<Listing::ExtraSavedArguments>(move(value)));
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return listing.saved_arguments.last()->template get_pointer<T>();
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}
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template<auto member, typename... Args>
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void append_to_listing(Args&&... args)
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{
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VERIFY(m_current_listing_index.has_value());
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m_current_listing_index->listing.entries.empend(member, Listing::ArgumentsFor<member> { forward<Args>(args)... });
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}
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[[nodiscard]] bool should_append_to_listing() const { return m_current_listing_index.has_value(); }
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[[nodiscard]] bool should_execute_after_appending_to_listing() const { return m_current_listing_index.has_value() && m_current_listing_index->mode == GL_COMPILE_AND_EXECUTE; }
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GLenum m_current_draw_mode;
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GLenum m_current_matrix_mode;
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FloatMatrix4x4 m_projection_matrix;
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@ -82,6 +108,70 @@ private:
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Clipper m_clipper;
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SoftwareRasterizer m_rasterizer;
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struct Listing {
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template<typename F>
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struct TupleTypeForArgumentListOf_;
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template<typename Ret, typename C, typename... Args>
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struct TupleTypeForArgumentListOf_<Ret (C::*)(Args...)> {
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using Type = Tuple<Args...>;
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};
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template<typename F>
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using TupleTypeForArgumentListOf = typename TupleTypeForArgumentListOf_<F>::Type;
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template<auto member>
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using ArgumentsFor = TupleTypeForArgumentListOf<decltype(member)>;
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template<typename... Fns>
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struct FunctionAndArgs {
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Variant<Fns...> function;
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Variant<TupleTypeForArgumentListOf<Fns>...> arguments;
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};
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using FunctionsAndArgs = FunctionAndArgs<
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decltype(&SoftwareGLContext::gl_begin),
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decltype(&SoftwareGLContext::gl_clear),
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decltype(&SoftwareGLContext::gl_clear_color),
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decltype(&SoftwareGLContext::gl_clear_depth),
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decltype(&SoftwareGLContext::gl_color),
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decltype(&SoftwareGLContext::gl_end),
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decltype(&SoftwareGLContext::gl_frustum),
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decltype(&SoftwareGLContext::gl_load_identity),
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decltype(&SoftwareGLContext::gl_load_matrix),
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decltype(&SoftwareGLContext::gl_matrix_mode),
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decltype(&SoftwareGLContext::gl_ortho),
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decltype(&SoftwareGLContext::gl_push_matrix),
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decltype(&SoftwareGLContext::gl_pop_matrix),
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decltype(&SoftwareGLContext::gl_rotate),
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decltype(&SoftwareGLContext::gl_scale),
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decltype(&SoftwareGLContext::gl_translate),
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decltype(&SoftwareGLContext::gl_vertex),
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decltype(&SoftwareGLContext::gl_viewport),
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decltype(&SoftwareGLContext::gl_enable),
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decltype(&SoftwareGLContext::gl_disable),
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decltype(&SoftwareGLContext::gl_front_face),
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decltype(&SoftwareGLContext::gl_cull_face),
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decltype(&SoftwareGLContext::gl_call_list)>;
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using ExtraSavedArguments = Variant<
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FloatMatrix4x4>;
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Vector<NonnullOwnPtr<ExtraSavedArguments>> saved_arguments;
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Vector<FunctionsAndArgs> entries;
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};
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static constexpr size_t max_allowed_gl_call_depth { 128 };
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size_t m_gl_call_depth { 0 };
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Vector<Listing> m_listings;
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struct CurrentListing {
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Listing listing;
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size_t index { 0 };
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GLenum mode { GL_COMPILE };
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};
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Optional<CurrentListing> m_current_listing_index;
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};
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}
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