143 lines
4.6 KiB
C++
143 lines
4.6 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "VideoCommon/VertexLoader_TextCoord.h"
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#include <type_traits>
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h"
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#include "VideoCommon/DataReader.h"
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#include "VideoCommon/VertexLoader.h"
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#include "VideoCommon/VertexLoaderManager.h"
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#include "VideoCommon/VertexLoaderUtils.h"
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namespace
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{
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void TexCoord_Read_Dummy(VertexLoader* loader)
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{
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loader->m_tcIndex++;
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}
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template <typename T>
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constexpr float TCScale(T val, float scale)
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{
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return val * scale;
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}
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template <>
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constexpr float TCScale(float val, [[maybe_unused]] float scale)
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{
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return val;
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}
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template <typename T, int N>
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void TexCoord_ReadDirect(VertexLoader* loader)
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{
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const auto scale = loader->m_tcScale[loader->m_tcIndex];
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DataReader dst(g_vertex_manager_write_ptr, nullptr);
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DataReader src(g_video_buffer_read_ptr, nullptr);
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for (int i = 0; i != N; ++i)
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dst.Write(TCScale(src.Read<T>(), scale));
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g_vertex_manager_write_ptr = dst.GetPointer();
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g_video_buffer_read_ptr = src.GetPointer();
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++loader->m_tcIndex;
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}
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template <typename I, typename T, int N>
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void TexCoord_ReadIndex(VertexLoader* loader)
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{
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static_assert(std::is_unsigned<I>::value, "Only unsigned I is sane!");
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const auto index = DataRead<I>();
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const auto data = reinterpret_cast<const T*>(
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VertexLoaderManager::cached_arraybases[CPArray::TexCoord0 + loader->m_tcIndex] +
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(index * g_main_cp_state.array_strides[CPArray::TexCoord0 + loader->m_tcIndex]));
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const auto scale = loader->m_tcScale[loader->m_tcIndex];
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DataReader dst(g_vertex_manager_write_ptr, nullptr);
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for (int i = 0; i != N; ++i)
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dst.Write(TCScale(Common::FromBigEndian(data[i]), scale));
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g_vertex_manager_write_ptr = dst.GetPointer();
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++loader->m_tcIndex;
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}
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using Common::EnumMap;
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// These functions are to work around a "too many initializer values" error with nested brackets
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// C++ does not let you write std::array<std::array<u32, 2>, 2> a = {{1, 2}, {3, 4}}
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// (although it does allow std::array<std::array<u32, 2>, 2> b = {1, 2, 3, 4})
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constexpr EnumMap<TPipelineFunction, TexComponentCount::ST> e(TPipelineFunction s,
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TPipelineFunction st)
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{
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return {s, st};
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}
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constexpr EnumMap<u32, TexComponentCount::ST> e(u32 s, u32 st)
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{
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return {s, st};
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}
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constexpr EnumMap<EnumMap<TPipelineFunction, TexComponentCount::ST>, ComponentFormat::Float>
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f(EnumMap<EnumMap<TPipelineFunction, TexComponentCount::ST>, ComponentFormat::Float> in)
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{
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return in;
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}
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constexpr EnumMap<EnumMap<u32, TexComponentCount::ST>, ComponentFormat::Float>
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g(EnumMap<EnumMap<u32, TexComponentCount::ST>, ComponentFormat::Float> in)
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{
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return in;
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}
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template <typename T>
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using Table = EnumMap<EnumMap<EnumMap<T, TexComponentCount::ST>, ComponentFormat::Float>,
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VertexComponentFormat::Index16>;
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constexpr Table<TPipelineFunction> s_table_read_tex_coord = {
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f({
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e(nullptr, nullptr),
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e(nullptr, nullptr),
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e(nullptr, nullptr),
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e(nullptr, nullptr),
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e(nullptr, nullptr),
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}),
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f({
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e(TexCoord_ReadDirect<u8, 1>, TexCoord_ReadDirect<u8, 2>),
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e(TexCoord_ReadDirect<s8, 1>, TexCoord_ReadDirect<s8, 2>),
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e(TexCoord_ReadDirect<u16, 1>, TexCoord_ReadDirect<u16, 2>),
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e(TexCoord_ReadDirect<s16, 1>, TexCoord_ReadDirect<s16, 2>),
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e(TexCoord_ReadDirect<float, 1>, TexCoord_ReadDirect<float, 2>),
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}),
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f({
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e(TexCoord_ReadIndex<u8, u8, 1>, TexCoord_ReadIndex<u8, u8, 2>),
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e(TexCoord_ReadIndex<u8, s8, 1>, TexCoord_ReadIndex<u8, s8, 2>),
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e(TexCoord_ReadIndex<u8, u16, 1>, TexCoord_ReadIndex<u8, u16, 2>),
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e(TexCoord_ReadIndex<u8, s16, 1>, TexCoord_ReadIndex<u8, s16, 2>),
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e(TexCoord_ReadIndex<u8, float, 1>, TexCoord_ReadIndex<u8, float, 2>),
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}),
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f({
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e(TexCoord_ReadIndex<u16, u8, 1>, TexCoord_ReadIndex<u16, u8, 2>),
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e(TexCoord_ReadIndex<u16, s8, 1>, TexCoord_ReadIndex<u16, s8, 2>),
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e(TexCoord_ReadIndex<u16, u16, 1>, TexCoord_ReadIndex<u16, u16, 2>),
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e(TexCoord_ReadIndex<u16, s16, 1>, TexCoord_ReadIndex<u16, s16, 2>),
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e(TexCoord_ReadIndex<u16, float, 1>, TexCoord_ReadIndex<u16, float, 2>),
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}),
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};
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} // Anonymous namespace
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TPipelineFunction VertexLoader_TextCoord::GetFunction(VertexComponentFormat type,
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ComponentFormat format,
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TexComponentCount elements)
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{
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return s_table_read_tex_coord[type][format][elements];
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}
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TPipelineFunction VertexLoader_TextCoord::GetDummyFunction()
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{
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return TexCoord_Read_Dummy;
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}
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