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dolphin/Source/Core/VideoCommon/VertexLoader.cpp

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// Copyright 2008 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/VertexLoader.h"
#include "Common/Assert.h"
#include "Common/CommonTypes.h"
#include "VideoCommon/DataReader.h"
#include "VideoCommon/VertexLoaderManager.h"
#include "VideoCommon/VertexLoaderUtils.h"
#include "VideoCommon/VertexLoader_Color.h"
#include "VideoCommon/VertexLoader_Normal.h"
#include "VideoCommon/VertexLoader_Position.h"
#include "VideoCommon/VertexLoader_TextCoord.h"
#include "VideoCommon/VideoCommon.h"
// This pointer is used as the source/dst for all fixed function loader calls
u8* g_video_buffer_read_ptr;
u8* g_vertex_manager_write_ptr;
static void PosMtx_ReadDirect_UByte(VertexLoader* loader)
{
u32 posmtx = DataRead<u8>() & 0x3f;
if (loader->m_counter < 3)
VertexLoaderManager::position_matrix_index[loader->m_counter + 1] = posmtx;
DataWrite<u32>(posmtx);
PRIM_LOG("posmtx: {}, ", posmtx);
}
static void TexMtx_ReadDirect_UByte(VertexLoader* loader)
{
loader->m_curtexmtx[loader->m_texmtxread] = DataRead<u8>() & 0x3f;
PRIM_LOG("texmtx{}: {}, ", loader->m_texmtxread, loader->m_curtexmtx[loader->m_texmtxread]);
loader->m_texmtxread++;
}
static void TexMtx_Write_Float(VertexLoader* loader)
{
DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
}
static void TexMtx_Write_Float2(VertexLoader* loader)
{
DataWrite(0.f);
DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
}
static void TexMtx_Write_Float3(VertexLoader* loader)
{
DataWrite(0.f);
DataWrite(0.f);
DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
}
static void SkipVertex(VertexLoader* loader)
{
if (loader->m_vertexSkip)
{
// reset the output buffer
g_vertex_manager_write_ptr -= loader->m_native_vtx_decl.stride;
loader->m_skippedVertices++;
}
}
VertexLoader::VertexLoader(const TVtxDesc& vtx_desc, const VAT& vtx_attr)
: VertexLoaderBase(vtx_desc, vtx_attr)
{
CompileVertexTranslator();
// generate frac factors
m_posScale = 1.0f / (1U << m_VtxAttr.g0.PosFrac);
for (u32 i = 0; i < 8; i++)
m_tcScale[i] = 1.0f / (1U << m_VtxAttr.GetTexFrac(i));
}
void VertexLoader::CompileVertexTranslator()
{
// Reset pipeline
m_numPipelineStages = 0;
// Position in pc vertex format.
int nat_offset = 0;
// Position Matrix Index
if (m_VtxDesc.low.PosMatIdx)
{
WriteCall(PosMtx_ReadDirect_UByte);
m_native_vtx_decl.posmtx.components = 4;
m_native_vtx_decl.posmtx.enable = true;
m_native_vtx_decl.posmtx.offset = nat_offset;
m_native_vtx_decl.posmtx.type = ComponentFormat::UByte;
m_native_vtx_decl.posmtx.integer = true;
nat_offset += 4;
}
for (auto texmtxidx : m_VtxDesc.low.TexMatIdx)
{
if (texmtxidx)
WriteCall(TexMtx_ReadDirect_UByte);
}
// Write vertex position loader
WriteCall(VertexLoader_Position::GetFunction(m_VtxDesc.low.Position, m_VtxAttr.g0.PosFormat,
m_VtxAttr.g0.PosElements));
int pos_elements = m_VtxAttr.g0.PosElements == CoordComponentCount::XY ? 2 : 3;
m_native_vtx_decl.position.components = pos_elements;
m_native_vtx_decl.position.enable = true;
m_native_vtx_decl.position.offset = nat_offset;
m_native_vtx_decl.position.type = ComponentFormat::Float;
m_native_vtx_decl.position.integer = false;
nat_offset += pos_elements * sizeof(float);
// Normals
if (m_VtxDesc.low.Normal != VertexComponentFormat::NotPresent)
{
TPipelineFunction pFunc =
VertexLoader_Normal::GetFunction(m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat,
m_VtxAttr.g0.NormalElements, m_VtxAttr.g0.NormalIndex3);
if (pFunc == nullptr)
{
PanicAlertFmt("VertexLoader_Normal::GetFunction({} {} {} {}) returned zero!",
m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat, m_VtxAttr.g0.NormalElements,
m_VtxAttr.g0.NormalIndex3);
}
WriteCall(pFunc);
for (int i = 0; i < (m_VtxAttr.g0.NormalElements == NormalComponentCount::NBT ? 3 : 1); i++)
{
m_native_vtx_decl.normals[i].components = 3;
m_native_vtx_decl.normals[i].enable = true;
m_native_vtx_decl.normals[i].offset = nat_offset;
m_native_vtx_decl.normals[i].type = ComponentFormat::Float;
m_native_vtx_decl.normals[i].integer = false;
nat_offset += 12;
}
}
for (size_t i = 0; i < m_VtxDesc.low.Color.Size(); i++)
{
m_native_vtx_decl.colors[i].components = 4;
m_native_vtx_decl.colors[i].type = ComponentFormat::UByte;
m_native_vtx_decl.colors[i].integer = false;
TPipelineFunction pFunc =
VertexLoader_Color::GetFunction(m_VtxDesc.low.Color[i], m_VtxAttr.GetColorFormat(i));
if (pFunc != nullptr)
WriteCall(pFunc);
else
ASSERT(m_VtxDesc.low.Color[i] == VertexComponentFormat::NotPresent);
if (m_VtxDesc.low.Color[i] != VertexComponentFormat::NotPresent)
{
m_native_vtx_decl.colors[i].offset = nat_offset;
m_native_vtx_decl.colors[i].enable = true;
nat_offset += 4;
}
}
// Texture matrix indices (remove if corresponding texture coordinate isn't enabled)
for (size_t i = 0; i < m_VtxDesc.high.TexCoord.Size(); i++)
{
m_native_vtx_decl.texcoords[i].offset = nat_offset;
m_native_vtx_decl.texcoords[i].type = ComponentFormat::Float;
m_native_vtx_decl.texcoords[i].integer = false;
const auto tc = m_VtxDesc.high.TexCoord[i].Value();
const auto format = m_VtxAttr.GetTexFormat(i);
const auto elements = m_VtxAttr.GetTexElements(i);
if (tc != VertexComponentFormat::NotPresent)
{
ASSERT_MSG(VIDEO, VertexComponentFormat::Direct <= tc && tc <= VertexComponentFormat::Index16,
"Invalid texture coordinates!\n(tc = %d)", (u32)tc);
ASSERT_MSG(VIDEO, ComponentFormat::UByte <= format && format <= ComponentFormat::Float,
"Invalid texture coordinates format!\n(format = %d)", (u32)format);
ASSERT_MSG(VIDEO, elements == TexComponentCount::S || elements == TexComponentCount::ST,
"Invalid number of texture coordinates elements!\n(elements = %d)", (u32)elements);
WriteCall(VertexLoader_TextCoord::GetFunction(tc, format, elements));
}
if (m_VtxDesc.low.TexMatIdx[i])
{
m_native_vtx_decl.texcoords[i].enable = true;
m_native_vtx_decl.texcoords[i].components = 3;
nat_offset += 12;
if (tc != VertexComponentFormat::NotPresent)
{
// if texmtx is included, texcoord will always be 3 floats, z will be the texmtx index
WriteCall(elements == TexComponentCount::ST ? TexMtx_Write_Float : TexMtx_Write_Float2);
}
else
{
WriteCall(TexMtx_Write_Float3);
}
}
else
{
if (tc != VertexComponentFormat::NotPresent)
{
m_native_vtx_decl.texcoords[i].enable = true;
m_native_vtx_decl.texcoords[i].components = elements == TexComponentCount::ST ? 2 : 1;
nat_offset += 4 * (elements == TexComponentCount::ST ? 2 : 1);
}
}
if (tc == VertexComponentFormat::NotPresent)
{
// if there's more tex coords later, have to write a dummy call
bool has_more = false;
for (size_t j = 0; j < m_VtxDesc.high.TexCoord.Size(); ++j)
{
if (m_VtxDesc.high.TexCoord[j] != VertexComponentFormat::NotPresent)
{
has_more = true;
WriteCall(VertexLoader_TextCoord::GetDummyFunction()); // important to get indices right!
break;
}
else if (m_VtxDesc.low.TexMatIdx[i])
{
has_more = true;
}
}
if (!has_more)
{
// no more tex coords and tex matrices, so exit loop
break;
}
}
}
// indexed position formats may skip the vertex
if (IsIndexed(m_VtxDesc.low.Position))
{
WriteCall(SkipVertex);
}
m_native_vtx_decl.stride = nat_offset;
}
void VertexLoader::WriteCall(TPipelineFunction func)
{
m_PipelineStages[m_numPipelineStages++] = func;
}
int VertexLoader::RunVertices(DataReader src, DataReader dst, int count)
{
g_vertex_manager_write_ptr = dst.GetPointer();
g_video_buffer_read_ptr = src.GetPointer();
m_numLoadedVertices += count;
m_skippedVertices = 0;
for (m_counter = count - 1; m_counter >= 0; m_counter--)
{
m_tcIndex = 0;
m_colIndex = 0;
m_texmtxwrite = m_texmtxread = 0;
for (int i = 0; i < m_numPipelineStages; i++)
m_PipelineStages[i](this);
PRIM_LOG("\n");
}
return count - m_skippedVertices;
}
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