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581a575042
I originally added these in2b1d1038a6, for both the TPipelineFunction and the size. The size was moved into the header infdcd2b7d00(making the size functions obsolete), but it seems that the functions themselves are no longer needed now. I think I didn't use this approach before because it would have required ComponentFormatTable and ComponentCountRow to be templated, which would end up resulting in lines that were too long and thus wrapped in awkward places. (I *think* they didn't get inferred properly.) Now that we only need TPipelineFunction, the templating is not needed, and this ends up being a more readable version of the version with the wrapper functions.
122 lines
4.3 KiB
C++
122 lines
4.3 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_Position.h"
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#include <limits>
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#include <type_traits>
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#include "Common/CommonTypes.h"
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#include "Common/EnumMap.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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#include "VideoCommon/VideoCommon.h"
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namespace
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{
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template <typename T>
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constexpr float PosScale(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 PosScale(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 Pos_ReadDirect(VertexLoader* loader)
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{
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static_assert(N <= 3, "N > 3 is not sane!");
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const auto scale = loader->m_posScale;
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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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{
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const float value = PosScale(src.Read<T>(), scale);
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if (loader->m_remaining < 3)
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VertexLoaderManager::position_cache[loader->m_remaining][i] = value;
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dst.Write(value);
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}
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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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LOG_VTX();
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}
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template <typename I, typename T, int N>
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void Pos_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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static_assert(N <= 3, "N > 3 is not sane!");
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const auto index = DataRead<I>();
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loader->m_vertexSkip = index == std::numeric_limits<I>::max();
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const auto data =
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reinterpret_cast<const T*>(VertexLoaderManager::cached_arraybases[CPArray::Position] +
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(index * g_main_cp_state.array_strides[CPArray::Position]));
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const auto scale = loader->m_posScale;
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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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{
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const float value = PosScale(Common::FromBigEndian(data[i]), scale);
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if (loader->m_remaining < 3)
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VertexLoaderManager::position_cache[loader->m_remaining][i] = value;
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dst.Write(value);
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}
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g_vertex_manager_write_ptr = dst.GetPointer();
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LOG_VTX();
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}
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using ComponentCountRow = Common::EnumMap<TPipelineFunction, CoordComponentCount::XYZ>;
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using ComponentFormatTable = Common::EnumMap<ComponentCountRow, ComponentFormat::Float>;
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using Table = Common::EnumMap<ComponentFormatTable, VertexComponentFormat::Index16>;
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constexpr Table s_table_read_position = {
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ComponentFormatTable({
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ComponentCountRow(nullptr, nullptr),
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ComponentCountRow(nullptr, nullptr),
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ComponentCountRow(nullptr, nullptr),
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ComponentCountRow(nullptr, nullptr),
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ComponentCountRow(nullptr, nullptr),
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}),
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ComponentFormatTable({
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ComponentCountRow(Pos_ReadDirect<u8, 2>, Pos_ReadDirect<u8, 3>),
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ComponentCountRow(Pos_ReadDirect<s8, 2>, Pos_ReadDirect<s8, 3>),
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ComponentCountRow(Pos_ReadDirect<u16, 2>, Pos_ReadDirect<u16, 3>),
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ComponentCountRow(Pos_ReadDirect<s16, 2>, Pos_ReadDirect<s16, 3>),
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ComponentCountRow(Pos_ReadDirect<float, 2>, Pos_ReadDirect<float, 3>),
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}),
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ComponentFormatTable({
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ComponentCountRow(Pos_ReadIndex<u8, u8, 2>, Pos_ReadIndex<u8, u8, 3>),
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ComponentCountRow(Pos_ReadIndex<u8, s8, 2>, Pos_ReadIndex<u8, s8, 3>),
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ComponentCountRow(Pos_ReadIndex<u8, u16, 2>, Pos_ReadIndex<u8, u16, 3>),
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ComponentCountRow(Pos_ReadIndex<u8, s16, 2>, Pos_ReadIndex<u8, s16, 3>),
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ComponentCountRow(Pos_ReadIndex<u8, float, 2>, Pos_ReadIndex<u8, float, 3>),
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}),
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ComponentFormatTable({
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ComponentCountRow(Pos_ReadIndex<u16, u8, 2>, Pos_ReadIndex<u16, u8, 3>),
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ComponentCountRow(Pos_ReadIndex<u16, s8, 2>, Pos_ReadIndex<u16, s8, 3>),
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ComponentCountRow(Pos_ReadIndex<u16, u16, 2>, Pos_ReadIndex<u16, u16, 3>),
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ComponentCountRow(Pos_ReadIndex<u16, s16, 2>, Pos_ReadIndex<u16, s16, 3>),
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ComponentCountRow(Pos_ReadIndex<u16, float, 2>, Pos_ReadIndex<u16, float, 3>),
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}),
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};
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} // Anonymous namespace
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TPipelineFunction VertexLoader_Position::GetFunction(VertexComponentFormat type,
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ComponentFormat format,
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CoordComponentCount elements)
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{
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return s_table_read_position[type][format][elements];
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}
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