256 lines
10 KiB
C++
256 lines
10 KiB
C++
// Copyright 2014 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "VideoCommon/VertexLoaderBase.h"
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#include <array>
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#include <bit>
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#include <cstring>
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#include <memory>
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#include <string>
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#include <vector>
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#include <fmt/format.h>
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#include "Common/Assert.h"
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#include "Common/BitUtils.h"
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#include "Common/CommonTypes.h"
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#include "Common/Logging/Log.h"
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#include "Common/MsgHandler.h"
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#include "VideoCommon/VertexLoader.h"
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#include "VideoCommon/VertexLoaderManager.h"
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#include "VideoCommon/VertexLoader_Color.h"
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#include "VideoCommon/VertexLoader_Normal.h"
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#include "VideoCommon/VertexLoader_Position.h"
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#include "VideoCommon/VertexLoader_TextCoord.h"
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#ifdef _M_X86_64
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#include "VideoCommon/VertexLoaderX64.h"
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#elif defined(_M_ARM_64)
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#include "VideoCommon/VertexLoaderARM64.h"
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#endif
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// a hacky implementation to compare two vertex loaders
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class VertexLoaderTester : public VertexLoaderBase
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{
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public:
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VertexLoaderTester(std::unique_ptr<VertexLoaderBase> a_, std::unique_ptr<VertexLoaderBase> b_,
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const TVtxDesc& vtx_desc, const VAT& vtx_attr)
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: VertexLoaderBase(vtx_desc, vtx_attr), a(std::move(a_)), b(std::move(b_))
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{
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ASSERT(a && b);
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if (a->m_vertex_size == b->m_vertex_size && a->m_native_components == b->m_native_components &&
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a->m_native_vtx_decl.stride == b->m_native_vtx_decl.stride)
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{
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// These are generated from the VAT and vertex desc, so they should match.
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// m_native_vtx_decl.stride isn't set yet, though.
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ASSERT(m_vertex_size == a->m_vertex_size && m_native_components == a->m_native_components);
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memcpy(&m_native_vtx_decl, &a->m_native_vtx_decl, sizeof(PortableVertexDeclaration));
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}
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else
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{
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PanicAlertFmt("Can't compare vertex loaders that expect different vertex formats!\n"
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"a: m_vertex_size {}, m_native_components {:#010x}, stride {}\n"
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"b: m_vertex_size {}, m_native_components {:#010x}, stride {}",
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a->m_vertex_size, a->m_native_components, a->m_native_vtx_decl.stride,
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b->m_vertex_size, b->m_native_components, b->m_native_vtx_decl.stride);
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}
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}
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int RunVertices(const u8* src, u8* dst, int count) override
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{
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buffer_a.resize(count * a->m_native_vtx_decl.stride + 4);
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buffer_b.resize(count * b->m_native_vtx_decl.stride + 4);
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const std::array<u32, 3> old_position_matrix_index_cache =
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VertexLoaderManager::position_matrix_index_cache;
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const std::array<std::array<float, 4>, 3> old_position_cache =
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VertexLoaderManager::position_cache;
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const std::array<float, 4> old_tangent_cache = VertexLoaderManager::tangent_cache;
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const std::array<float, 4> old_binormal_cache = VertexLoaderManager::binormal_cache;
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const int count_a = a->RunVertices(src, buffer_a.data(), count);
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const std::array<u32, 3> a_position_matrix_index_cache =
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VertexLoaderManager::position_matrix_index_cache;
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const std::array<std::array<float, 4>, 3> a_position_cache =
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VertexLoaderManager::position_cache;
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const std::array<float, 4> a_tangent_cache = VertexLoaderManager::tangent_cache;
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const std::array<float, 4> a_binormal_cache = VertexLoaderManager::binormal_cache;
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// Reset state before running b
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VertexLoaderManager::position_matrix_index_cache = old_position_matrix_index_cache;
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VertexLoaderManager::position_cache = old_position_cache;
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VertexLoaderManager::tangent_cache = old_tangent_cache;
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VertexLoaderManager::binormal_cache = old_binormal_cache;
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const int count_b = b->RunVertices(src, buffer_b.data(), count);
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const std::array<u32, 3> b_position_matrix_index_cache =
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VertexLoaderManager::position_matrix_index_cache;
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const std::array<std::array<float, 4>, 3> b_position_cache =
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VertexLoaderManager::position_cache;
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const std::array<float, 4> b_tangent_cache = VertexLoaderManager::tangent_cache;
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const std::array<float, 4> b_binormal_cache = VertexLoaderManager::binormal_cache;
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ASSERT_MSG(VIDEO, count_a == count_b,
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"The two vertex loaders have loaded a different amount of vertices (a: {}, b: {}).",
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count_a, count_b);
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ASSERT_MSG(VIDEO,
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memcmp(buffer_a.data(), buffer_b.data(),
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std::min(count_a, count_b) * m_native_vtx_decl.stride) == 0,
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"The two vertex loaders have loaded different data. Configuration:"
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"\nVertex desc:\n{}\n\nVertex attr:\n{}",
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m_VtxDesc, m_VtxAttr);
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ASSERT_MSG(VIDEO, a_position_matrix_index_cache == b_position_matrix_index_cache,
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"Expected matching position matrix caches after loading (a: {}; b: {})",
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fmt::join(a_position_matrix_index_cache, ", "),
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fmt::join(b_position_matrix_index_cache, ", "));
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// Some games (e.g. Donkey Kong Country Returns) have a few draws that contain NaN.
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// Since NaN != NaN, we need to compare the bits instead.
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const auto bit_equal = [](float val_a, float val_b) {
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return Common::BitCast<u32>(val_a) == Common::BitCast<u32>(val_b);
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};
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// The last element is allowed to be garbage for SIMD overwrites.
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// For XY, the last 2 are garbage.
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const bool positions_match = [&] {
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const size_t max_component = m_VtxAttr.g0.PosElements == CoordComponentCount::XYZ ? 3 : 2;
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for (size_t vertex = 0; vertex < 3; vertex++)
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{
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if (!std::equal(a_position_cache[vertex].begin(),
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a_position_cache[vertex].begin() + max_component,
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b_position_cache[vertex].begin(), bit_equal))
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{
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return false;
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}
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}
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return true;
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}();
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ASSERT_MSG(VIDEO, positions_match,
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"Expected matching position caches after loading (a: {} / {} / {}; b: {} / {} / {})",
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fmt::join(a_position_cache[0], ", "), fmt::join(a_position_cache[1], ", "),
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fmt::join(a_position_cache[2], ", "), fmt::join(b_position_cache[0], ", "),
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fmt::join(b_position_cache[1], ", "), fmt::join(b_position_cache[2], ", "));
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// The last element is allowed to be garbage for SIMD overwrites
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ASSERT_MSG(VIDEO,
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std::equal(a_tangent_cache.begin(), a_tangent_cache.begin() + 3,
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b_tangent_cache.begin(), b_tangent_cache.begin() + 3, bit_equal),
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"Expected matching tangent caches after loading (a: {}; b: {})",
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fmt::join(a_tangent_cache, ", "), fmt::join(b_tangent_cache, ", "));
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ASSERT_MSG(VIDEO,
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std::equal(a_binormal_cache.begin(), a_binormal_cache.begin() + 3,
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b_binormal_cache.begin(), b_binormal_cache.begin() + 3, bit_equal),
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"Expected matching binormal caches after loading (a: {}; b: {})",
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fmt::join(a_binormal_cache, ", "), fmt::join(b_binormal_cache, ", "));
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memcpy(dst, buffer_a.data(), count_a * m_native_vtx_decl.stride);
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m_numLoadedVertices += count;
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return count_a;
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}
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private:
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std::unique_ptr<VertexLoaderBase> a;
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std::unique_ptr<VertexLoaderBase> b;
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std::vector<u8> buffer_a;
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std::vector<u8> buffer_b;
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};
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u32 VertexLoaderBase::GetVertexSize(const TVtxDesc& vtx_desc, const VAT& vtx_attr)
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{
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u32 size = 0;
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// Each enabled TexMatIdx adds one byte, as does PosMatIdx
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size += std::popcount(vtx_desc.low.Hex & 0x1FF);
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const u32 pos_size = VertexLoader_Position::GetSize(vtx_desc.low.Position, vtx_attr.g0.PosFormat,
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vtx_attr.g0.PosElements);
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size += pos_size;
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const u32 norm_size =
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VertexLoader_Normal::GetSize(vtx_desc.low.Normal, vtx_attr.g0.NormalFormat,
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vtx_attr.g0.NormalElements, vtx_attr.g0.NormalIndex3);
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size += norm_size;
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for (u32 i = 0; i < vtx_desc.low.Color.Size(); i++)
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{
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const u32 color_size =
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VertexLoader_Color::GetSize(vtx_desc.low.Color[i], vtx_attr.GetColorFormat(i));
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size += color_size;
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}
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for (u32 i = 0; i < vtx_desc.high.TexCoord.Size(); i++)
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{
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const u32 tc_size = VertexLoader_TextCoord::GetSize(
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vtx_desc.high.TexCoord[i], vtx_attr.GetTexFormat(i), vtx_attr.GetTexElements(i));
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size += tc_size;
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}
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return size;
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}
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u32 VertexLoaderBase::GetVertexComponents(const TVtxDesc& vtx_desc, const VAT& vtx_attr)
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{
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u32 components = 0;
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if (vtx_desc.low.PosMatIdx)
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components |= VB_HAS_POSMTXIDX;
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for (u32 i = 0; i < vtx_desc.low.TexMatIdx.Size(); i++)
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{
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if (vtx_desc.low.TexMatIdx[i])
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components |= VB_HAS_TEXMTXIDX0 << i;
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}
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// Vertices always have positions; thus there is no VB_HAS_POS as it would always be set
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if (vtx_desc.low.Normal != VertexComponentFormat::NotPresent)
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{
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components |= VB_HAS_NORMAL;
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if (vtx_attr.g0.NormalElements == NormalComponentCount::NTB)
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components |= VB_HAS_TANGENT | VB_HAS_BINORMAL;
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}
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for (u32 i = 0; i < vtx_desc.low.Color.Size(); i++)
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{
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if (vtx_desc.low.Color[i] != VertexComponentFormat::NotPresent)
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components |= VB_HAS_COL0 << i;
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}
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for (u32 i = 0; i < vtx_desc.high.TexCoord.Size(); i++)
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{
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if (vtx_desc.high.TexCoord[i] != VertexComponentFormat::NotPresent)
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components |= VB_HAS_UV0 << i;
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}
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return components;
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}
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std::unique_ptr<VertexLoaderBase> VertexLoaderBase::CreateVertexLoader(const TVtxDesc& vtx_desc,
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const VAT& vtx_attr)
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{
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std::unique_ptr<VertexLoaderBase> loader = nullptr;
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// #define COMPARE_VERTEXLOADERS
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#if defined(_M_X86_64)
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loader = std::make_unique<VertexLoaderX64>(vtx_desc, vtx_attr);
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#elif defined(_M_ARM_64)
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loader = std::make_unique<VertexLoaderARM64>(vtx_desc, vtx_attr);
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#endif
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// Use the software loader as a fallback
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// (not currently applicable, as both VertexLoaderX64 and VertexLoaderARM64
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// are always usable, but if a loader that only works on some CPUs is created
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// then this fallback would be used)
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if (!loader)
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loader = std::make_unique<VertexLoader>(vtx_desc, vtx_attr);
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#if defined(COMPARE_VERTEXLOADERS)
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return std::make_unique<VertexLoaderTester>(
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std::make_unique<VertexLoader>(vtx_desc, vtx_attr), // the software one
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std::move(loader), // the new one to compare
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vtx_desc, vtx_attr);
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#else
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return loader;
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#endif
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}
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