151 lines
6.0 KiB
C++
151 lines
6.0 KiB
C++
#ifndef __JABYENGINE_GPU_PRIMITIVES_HPP__
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#define __JABYENGINE_GPU_PRIMITIVES_HPP__
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#include "gpu_types.hpp"
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#include <PSX/System/IOPorts/gpu_io.hpp>
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namespace JabyEngine {
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namespace GPU {
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namespace internal {
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struct Code {
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static constexpr uint8_t CmdValue = 0b001;
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static constexpr auto BitCorrection = 24;
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static constexpr auto CmdID = BitRange::from_to(29 - BitCorrection, 31 - BitCorrection);
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static constexpr auto GouraudShading = Bit(28 - BitCorrection);
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static constexpr auto FlatShading = !GouraudShading;
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static constexpr auto QuardVertics = Bit(27 - BitCorrection);
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static constexpr auto TriVertics = !QuardVertics;
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static constexpr auto Textured = Bit(26 - BitCorrection);
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static constexpr auto Untextured = !Textured;
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static constexpr auto SemiTransparent = Bit(25 - BitCorrection);
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static constexpr auto NonTransparent = !SemiTransparent;
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static constexpr auto BlendTexture = Bit(24 - BitCorrection);
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static constexpr auto NoBlendTexture = !BlendTexture;
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uint8_t value = bit::value::set_normalized(0u, CmdID.with(CmdValue));
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constexpr Code() = default;
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constexpr Code(const Code& code) : value(code.value) {
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}
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constexpr Code& set(Bit bit) {
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this->value = bit::set(this->value, bit);
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return *this;
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}
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constexpr Code& set(ClearBit bit) {
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this->value = bit::set(this->value, bit);
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return *this;
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}
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};
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// Concept for now
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template<typename T>
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struct Hooked {
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uint32_t hook;
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T primitive;
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};
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template<typename T>
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struct CodeInterface {
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constexpr T& set_semi_transparent() {
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static_cast<T*>(this)->code.set(Code::SemiTransparent);
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return *static_cast<T*>(this);
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}
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constexpr T& set_non_transparent() {
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static_cast<T*>(this)->code.set(Code::NonTransparent);
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return *static_cast<T*>(this);
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}
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constexpr T& set_texture_blending() {
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static_cast<T*>(this)->code.set(Code::BlendTexture);
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return *static_cast<T*>(this);
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}
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constexpr T& set_non_texture_blening() {
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static_cast<T*>(this)->code.set(Code::NoBlendTexture);
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return *static_cast<T*>(this);
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}
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};
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struct IsPrimitive {
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static constexpr bool is_primitive = true;
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typedef JabyEngine::GPU::internal::Code Code;
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};
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}
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// Reexport for easier use
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typedef JabyEngine::GPU_IO::SemiTransparency SemiTransparency;
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typedef JabyEngine::GPU_IO::TexturePageColor TexturePageColor;
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struct PageClut {
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uint16_t value = 0;
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constexpr PageClut() = default;
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constexpr PageClut(uint16_t x, uint16_t y) : value((y <<6 ) | ((x >> 4) & 0x3f)) {
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}
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};
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struct TPage {
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static constexpr auto TexturePageX = BitRange::from_to(0, 3);
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static constexpr auto TexturePageY = BitRange::from_to(4, 4);
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static constexpr auto SemiTransparency = BitRange::from_to(5, 6);
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static constexpr auto TextureClut = BitRange::from_to(7, 8);
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uint16_t value = 0;
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constexpr TPage() = default;
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constexpr TPage(uint16_t x, uint16_t y, ::JabyEngine::GPU::SemiTransparency transparency, TexturePageColor clut_color) : value(TexturePageX.as_value(x >> 6) | TexturePageY.as_value(y >> 8) | SemiTransparency.as_value(static_cast<uint16_t>(transparency)) | TextureClut.as_value(static_cast<uint16_t>(clut_color))) {
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}
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};
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/*
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1
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/ \
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3 - 2
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*/
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struct POLY_F3 : public internal::IsPrimitive, public internal::CodeInterface<POLY_F3> {
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static constexpr auto IdentityCode = Code().set(Code::FlatShading).set(Code::TriVertics).set(Code::Untextured).set(Code::NonTransparent).set(Code::NoBlendTexture);
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Color24 color;
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Code code = IdentityCode;
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Vertex vertex0;
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Vertex vertex1;
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Vertex vertex2;
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constexpr POLY_F3() = default;
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constexpr POLY_F3(const PositionI16 (&verticies)[3], Color24 color) : color(color), code(IdentityCode), vertex0(verticies[0]), vertex1(verticies[1]), vertex2(verticies[2]) {
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}
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};
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struct POLY_FT3 : public internal::IsPrimitive, public internal::CodeInterface<POLY_FT3> {
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static constexpr auto IdentityCode = Code(POLY_F3::IdentityCode).set(Code::Textured);
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Color24 color;
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Code code = IdentityCode;
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Vertex vertex0;
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PagePosition page0;
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PageClut page_clut;
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Vertex vertex1;
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PagePosition page1;
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TPage tpage;
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Vertex vertex2;
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PagePosition page2;
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uint16_t padded;
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constexpr POLY_FT3() = default;
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constexpr POLY_FT3(const PositionI16 (&verticies)[3], const PagePosition (&page_pos)[3], TPage tpage, PageClut clut, Color24 color)
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: color(color), code(IdentityCode), vertex0(verticies[0]), page0(page_pos[0]), page_clut(clut),
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vertex1(verticies[1]), page1(page_pos[1]), tpage(tpage), vertex2(verticies[2]), page2(page_pos[2]) {
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}
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};
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static_assert(sizeof(POLY_F3) == 16);
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static_assert(sizeof(POLY_FT3) == 28);
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}
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}
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#endif // !__JABYENGINE_GPU_PRIMITIVES_HPP__
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