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// Copyright 2008 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "VideoCommon/VertexLoader_Position.h"
#include <limits>
#include <type_traits>
#include "Common/CommonTypes.h"
#include "Common/Swap.h"
#include "VideoCommon/DataReader.h"
#include "VideoCommon/VertexLoader.h"
#include "VideoCommon/VertexLoaderManager.h"
#include "VideoCommon/VertexLoaderUtils.h"
#include "VideoCommon/VideoCommon.h"
namespace
{
template <typename T>
constexpr float PosScale(T val, float scale)
{
return val * scale;
}
template <>
constexpr float PosScale(float val, [[maybe_unused]] float scale)
{
return val;
}
template <typename T, int N>
void Pos_ReadDirect(VertexLoader* loader)
{
static_assert(N <= 3, "N > 3 is not sane!");
const auto scale = loader->m_posScale;
DataReader dst(g_vertex_manager_write_ptr, nullptr);
DataReader src(g_video_buffer_read_ptr, nullptr);
for (int i = 0; i < N; ++i)
{
const float value = PosScale(src.Read<T>(), scale);
if (loader->m_counter < 3)
VertexLoaderManager::position_cache[loader->m_counter][i] = value;
dst.Write(value);
}
g_vertex_manager_write_ptr = dst.GetPointer();
g_video_buffer_read_ptr = src.GetPointer();
LOG_VTX();
}
template <typename I, typename T, int N>
void Pos_ReadIndex(VertexLoader* loader)
{
static_assert(std::is_unsigned<I>::value, "Only unsigned I is sane!");
static_assert(N <= 3, "N > 3 is not sane!");
const auto index = DataRead<I>();
loader->m_vertexSkip = index == std::numeric_limits<I>::max();
const auto data =
reinterpret_cast<const T*>(VertexLoaderManager::cached_arraybases[ARRAY_POSITION] +
(index * g_main_cp_state.array_strides[ARRAY_POSITION]));
const auto scale = loader->m_posScale;
DataReader dst(g_vertex_manager_write_ptr, nullptr);
for (int i = 0; i < N; ++i)
{
const float value = PosScale(Common::FromBigEndian(data[i]), scale);
if (loader->m_counter < 3)
VertexLoaderManager::position_cache[loader->m_counter][i] = value;
dst.Write(value);
}
g_vertex_manager_write_ptr = dst.GetPointer();
LOG_VTX();
}
constexpr TPipelineFunction s_table_read_position[4][8][2] = {
{
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
},
{
{
Pos_ReadDirect<u8, 2>,
Pos_ReadDirect<u8, 3>,
},
{
Pos_ReadDirect<s8, 2>,
Pos_ReadDirect<s8, 3>,
},
{
Pos_ReadDirect<u16, 2>,
Pos_ReadDirect<u16, 3>,
},
{
Pos_ReadDirect<s16, 2>,
Pos_ReadDirect<s16, 3>,
},
{
Pos_ReadDirect<float, 2>,
Pos_ReadDirect<float, 3>,
},
},
{
{
Pos_ReadIndex<u8, u8, 2>,
Pos_ReadIndex<u8, u8, 3>,
},
{
Pos_ReadIndex<u8, s8, 2>,
Pos_ReadIndex<u8, s8, 3>,
},
{
Pos_ReadIndex<u8, u16, 2>,
Pos_ReadIndex<u8, u16, 3>,
},
{
Pos_ReadIndex<u8, s16, 2>,
Pos_ReadIndex<u8, s16, 3>,
},
{
Pos_ReadIndex<u8, float, 2>,
Pos_ReadIndex<u8, float, 3>,
},
},
{
{
Pos_ReadIndex<u16, u8, 2>,
Pos_ReadIndex<u16, u8, 3>,
},
{
Pos_ReadIndex<u16, s8, 2>,
Pos_ReadIndex<u16, s8, 3>,
},
{
Pos_ReadIndex<u16, u16, 2>,
Pos_ReadIndex<u16, u16, 3>,
},
{
Pos_ReadIndex<u16, s16, 2>,
Pos_ReadIndex<u16, s16, 3>,
},
{
Pos_ReadIndex<u16, float, 2>,
Pos_ReadIndex<u16, float, 3>,
},
},
};
constexpr u32 s_table_read_position_vertex_size[4][8][2] = {
{
{0, 0},
{0, 0},
{0, 0},
{0, 0},
{0, 0},
},
{
{2, 3},
{2, 3},
{4, 6},
{4, 6},
{8, 12},
},
{
{1, 1},
{1, 1},
{1, 1},
{1, 1},
{1, 1},
},
{
{2, 2},
{2, 2},
{2, 2},
{2, 2},
{2, 2},
},
};
} // Anonymous namespace
u32 VertexLoader_Position::GetSize(u64 type, u32 format, u32 elements)
{
return s_table_read_position_vertex_size[type][format][elements];
}
TPipelineFunction VertexLoader_Position::GetFunction(u64 type, u32 format, u32 elements)
{
return s_table_read_position[type][format][elements];
}
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