dolphin/Source/Core/VideoCommon/VertexLoader_TextCoord.cpp

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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/VertexLoader_TextCoord.h"
#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"
namespace
{
void TexCoord_Read_Dummy(VertexLoader* loader)
{
loader->m_tcIndex++;
}
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template <typename T>
constexpr float TCScale(T val, float scale)
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{
return val * scale;
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}
template <>
constexpr float TCScale(float val, [[maybe_unused]] float scale)
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{
return val;
}
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template <typename T, int N>
void TexCoord_ReadDirect(VertexLoader* loader)
{
const auto scale = loader->m_tcScale[loader->m_tcIndex];
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)
dst.Write(TCScale(src.Read<T>(), scale));
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g_vertex_manager_write_ptr = dst.GetPointer();
g_video_buffer_read_ptr = src.GetPointer();
++loader->m_tcIndex;
}
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template <typename I, typename T, int N>
void TexCoord_ReadIndex(VertexLoader* loader)
{
static_assert(std::is_unsigned<I>::value, "Only unsigned I is sane!");
const auto index = DataRead<I>();
const auto data = reinterpret_cast<const T*>(
VertexLoaderManager::cached_arraybases[ARRAY_TEXCOORD0 + loader->m_tcIndex] +
(index * g_main_cp_state.array_strides[ARRAY_TEXCOORD0 + loader->m_tcIndex]));
const auto scale = loader->m_tcScale[loader->m_tcIndex];
DataReader dst(g_vertex_manager_write_ptr, nullptr);
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for (int i = 0; i != N; ++i)
dst.Write(TCScale(Common::FromBigEndian(data[i]), scale));
g_vertex_manager_write_ptr = dst.GetPointer();
++loader->m_tcIndex;
}
constexpr TPipelineFunction s_table_read_tex_coord[4][8][2] = {
{
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
{
nullptr,
nullptr,
},
},
{
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{
TexCoord_ReadDirect<u8, 1>,
TexCoord_ReadDirect<u8, 2>,
},
{
TexCoord_ReadDirect<s8, 1>,
TexCoord_ReadDirect<s8, 2>,
},
{
TexCoord_ReadDirect<u16, 1>,
TexCoord_ReadDirect<u16, 2>,
},
{
TexCoord_ReadDirect<s16, 1>,
TexCoord_ReadDirect<s16, 2>,
},
{
TexCoord_ReadDirect<float, 1>,
TexCoord_ReadDirect<float, 2>,
},
},
{
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{
TexCoord_ReadIndex<u8, u8, 1>,
TexCoord_ReadIndex<u8, u8, 2>,
},
{
TexCoord_ReadIndex<u8, s8, 1>,
TexCoord_ReadIndex<u8, s8, 2>,
},
{
TexCoord_ReadIndex<u8, u16, 1>,
TexCoord_ReadIndex<u8, u16, 2>,
},
{
TexCoord_ReadIndex<u8, s16, 1>,
TexCoord_ReadIndex<u8, s16, 2>,
},
{
TexCoord_ReadIndex<u8, float, 1>,
TexCoord_ReadIndex<u8, float, 2>,
},
},
{
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{
TexCoord_ReadIndex<u16, u8, 1>,
TexCoord_ReadIndex<u16, u8, 2>,
},
{
TexCoord_ReadIndex<u16, s8, 1>,
TexCoord_ReadIndex<u16, s8, 2>,
},
{
TexCoord_ReadIndex<u16, u16, 1>,
TexCoord_ReadIndex<u16, u16, 2>,
},
{
TexCoord_ReadIndex<u16, s16, 1>,
TexCoord_ReadIndex<u16, s16, 2>,
},
{
TexCoord_ReadIndex<u16, float, 1>,
TexCoord_ReadIndex<u16, float, 2>,
},
},
};
constexpr u32 s_table_read_tex_coord_vertex_size[4][8][2] = {
{
{0, 0},
{0, 0},
{0, 0},
{0, 0},
{0, 0},
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},
{
{1, 2},
{1, 2},
{2, 4},
{2, 4},
{4, 8},
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},
{
{1, 1},
{1, 1},
{1, 1},
{1, 1},
{1, 1},
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},
{
{2, 2},
{2, 2},
{2, 2},
{2, 2},
{2, 2},
},
};
} // Anonymous namespace
u32 VertexLoader_TextCoord::GetSize(VertexComponentFormat type, ComponentFormat format,
TexComponentCount elements)
{
return s_table_read_tex_coord_vertex_size[u32(type)][u32(format)][u32(elements)];
}
TPipelineFunction VertexLoader_TextCoord::GetFunction(VertexComponentFormat type,
ComponentFormat format,
TexComponentCount elements)
{
return s_table_read_tex_coord[u32(type)][u32(format)][u32(elements)];
}
TPipelineFunction VertexLoader_TextCoord::GetDummyFunction()
{
return TexCoord_Read_Dummy;
}