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https://github.com/dolphin-emu/dolphin.git
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39b2854b98
This more accurately represents what's going on, and also ends at 0 instead of 1, making some indexing operations easier. This also changes it so that position_matrix_index_cache actually starts from index 0 instead of index 1.
272 lines
8.4 KiB
C++
272 lines
8.4 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.h"
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#include "Common/Assert.h"
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#include "Common/CommonTypes.h"
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#include "VideoCommon/DataReader.h"
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#include "VideoCommon/VertexLoaderManager.h"
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#include "VideoCommon/VertexLoaderUtils.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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#include "VideoCommon/VideoCommon.h"
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// This pointer is used as the source/dst for all fixed function loader calls
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u8* g_video_buffer_read_ptr;
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u8* g_vertex_manager_write_ptr;
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static void PosMtx_ReadDirect_UByte(VertexLoader* loader)
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{
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u32 posmtx = DataRead<u8>() & 0x3f;
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if (loader->m_remaining < 3)
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VertexLoaderManager::position_matrix_index_cache[loader->m_remaining] = posmtx;
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DataWrite<u32>(posmtx);
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PRIM_LOG("posmtx: {}, ", posmtx);
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}
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static void TexMtx_ReadDirect_UByte(VertexLoader* loader)
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{
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loader->m_curtexmtx[loader->m_texmtxread] = DataRead<u8>() & 0x3f;
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PRIM_LOG("texmtx{}: {}, ", loader->m_texmtxread, loader->m_curtexmtx[loader->m_texmtxread]);
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loader->m_texmtxread++;
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}
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static void TexMtx_Write_Float(VertexLoader* loader)
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{
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DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
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}
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static void TexMtx_Write_Float2(VertexLoader* loader)
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{
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DataWrite(0.f);
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DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
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}
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static void TexMtx_Write_Float3(VertexLoader* loader)
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{
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DataWrite(0.f);
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DataWrite(0.f);
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DataWrite(float(loader->m_curtexmtx[loader->m_texmtxwrite++]));
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}
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static void SkipVertex(VertexLoader* loader)
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{
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if (loader->m_vertexSkip)
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{
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// reset the output buffer
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g_vertex_manager_write_ptr -= loader->m_native_vtx_decl.stride;
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loader->m_skippedVertices++;
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}
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}
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VertexLoader::VertexLoader(const TVtxDesc& vtx_desc, const VAT& vtx_attr)
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: VertexLoaderBase(vtx_desc, vtx_attr)
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{
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CompileVertexTranslator();
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// generate frac factors
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m_posScale = 1.0f / (1U << m_VtxAttr.g0.PosFrac);
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for (u32 i = 0; i < 8; i++)
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m_tcScale[i] = 1.0f / (1U << m_VtxAttr.GetTexFrac(i));
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}
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void VertexLoader::CompileVertexTranslator()
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{
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// Reset pipeline
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m_numPipelineStages = 0;
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// Position in pc vertex format.
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int nat_offset = 0;
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// Position Matrix Index
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if (m_VtxDesc.low.PosMatIdx)
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{
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WriteCall(PosMtx_ReadDirect_UByte);
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m_native_vtx_decl.posmtx.components = 4;
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m_native_vtx_decl.posmtx.enable = true;
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m_native_vtx_decl.posmtx.offset = nat_offset;
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m_native_vtx_decl.posmtx.type = ComponentFormat::UByte;
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m_native_vtx_decl.posmtx.integer = true;
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nat_offset += 4;
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}
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for (auto texmtxidx : m_VtxDesc.low.TexMatIdx)
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{
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if (texmtxidx)
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WriteCall(TexMtx_ReadDirect_UByte);
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}
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// Write vertex position loader
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WriteCall(VertexLoader_Position::GetFunction(m_VtxDesc.low.Position, m_VtxAttr.g0.PosFormat,
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m_VtxAttr.g0.PosElements));
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int pos_elements = m_VtxAttr.g0.PosElements == CoordComponentCount::XY ? 2 : 3;
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m_native_vtx_decl.position.components = pos_elements;
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m_native_vtx_decl.position.enable = true;
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m_native_vtx_decl.position.offset = nat_offset;
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m_native_vtx_decl.position.type = ComponentFormat::Float;
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m_native_vtx_decl.position.integer = false;
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nat_offset += pos_elements * sizeof(float);
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// Normals
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if (m_VtxDesc.low.Normal != VertexComponentFormat::NotPresent)
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{
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TPipelineFunction pFunc =
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VertexLoader_Normal::GetFunction(m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat,
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m_VtxAttr.g0.NormalElements, m_VtxAttr.g0.NormalIndex3);
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if (pFunc == nullptr)
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{
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PanicAlertFmt("VertexLoader_Normal::GetFunction({} {} {} {}) returned zero!",
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m_VtxDesc.low.Normal, m_VtxAttr.g0.NormalFormat, m_VtxAttr.g0.NormalElements,
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m_VtxAttr.g0.NormalIndex3);
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}
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WriteCall(pFunc);
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for (int i = 0; i < (m_VtxAttr.g0.NormalElements == NormalComponentCount::NBT ? 3 : 1); i++)
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{
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m_native_vtx_decl.normals[i].components = 3;
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m_native_vtx_decl.normals[i].enable = true;
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m_native_vtx_decl.normals[i].offset = nat_offset;
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m_native_vtx_decl.normals[i].type = ComponentFormat::Float;
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m_native_vtx_decl.normals[i].integer = false;
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nat_offset += 12;
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}
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}
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for (size_t i = 0; i < m_VtxDesc.low.Color.Size(); i++)
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{
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m_native_vtx_decl.colors[i].components = 4;
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m_native_vtx_decl.colors[i].type = ComponentFormat::UByte;
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m_native_vtx_decl.colors[i].integer = false;
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TPipelineFunction pFunc =
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VertexLoader_Color::GetFunction(m_VtxDesc.low.Color[i], m_VtxAttr.GetColorFormat(i));
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if (pFunc != nullptr)
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WriteCall(pFunc);
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else
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ASSERT(m_VtxDesc.low.Color[i] == VertexComponentFormat::NotPresent);
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if (m_VtxDesc.low.Color[i] != VertexComponentFormat::NotPresent)
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{
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m_native_vtx_decl.colors[i].offset = nat_offset;
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m_native_vtx_decl.colors[i].enable = true;
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nat_offset += 4;
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}
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}
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// Texture matrix indices (remove if corresponding texture coordinate isn't enabled)
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for (size_t i = 0; i < m_VtxDesc.high.TexCoord.Size(); i++)
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{
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m_native_vtx_decl.texcoords[i].offset = nat_offset;
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m_native_vtx_decl.texcoords[i].type = ComponentFormat::Float;
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m_native_vtx_decl.texcoords[i].integer = false;
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const auto tc = m_VtxDesc.high.TexCoord[i].Value();
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const auto format = m_VtxAttr.GetTexFormat(i);
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const auto elements = m_VtxAttr.GetTexElements(i);
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if (tc != VertexComponentFormat::NotPresent)
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{
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ASSERT_MSG(VIDEO, VertexComponentFormat::Direct <= tc && tc <= VertexComponentFormat::Index16,
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"Invalid texture coordinates!\n(tc = {})", tc);
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ASSERT_MSG(VIDEO, ComponentFormat::UByte <= format && format <= ComponentFormat::Float,
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"Invalid texture coordinates format!\n(format = {})", format);
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ASSERT_MSG(VIDEO, elements == TexComponentCount::S || elements == TexComponentCount::ST,
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"Invalid number of texture coordinates elements!\n(elements = {})", elements);
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WriteCall(VertexLoader_TextCoord::GetFunction(tc, format, elements));
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}
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if (m_VtxDesc.low.TexMatIdx[i])
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{
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m_native_vtx_decl.texcoords[i].enable = true;
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m_native_vtx_decl.texcoords[i].components = 3;
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nat_offset += 12;
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if (tc != VertexComponentFormat::NotPresent)
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{
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// if texmtx is included, texcoord will always be 3 floats, z will be the texmtx index
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WriteCall(elements == TexComponentCount::ST ? TexMtx_Write_Float : TexMtx_Write_Float2);
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}
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else
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{
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WriteCall(TexMtx_Write_Float3);
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}
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}
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else
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{
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if (tc != VertexComponentFormat::NotPresent)
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{
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m_native_vtx_decl.texcoords[i].enable = true;
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m_native_vtx_decl.texcoords[i].components = elements == TexComponentCount::ST ? 2 : 1;
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nat_offset += 4 * (elements == TexComponentCount::ST ? 2 : 1);
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}
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}
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if (tc == VertexComponentFormat::NotPresent)
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{
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// if there's more tex coords later, have to write a dummy call
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bool has_more = false;
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for (size_t j = 0; j < m_VtxDesc.high.TexCoord.Size(); ++j)
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{
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if (m_VtxDesc.high.TexCoord[j] != VertexComponentFormat::NotPresent)
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{
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has_more = true;
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WriteCall(VertexLoader_TextCoord::GetDummyFunction()); // important to get indices right!
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break;
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}
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else if (m_VtxDesc.low.TexMatIdx[i])
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{
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has_more = true;
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}
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}
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if (!has_more)
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{
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// no more tex coords and tex matrices, so exit loop
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break;
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}
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}
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}
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// indexed position formats may skip the vertex
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if (IsIndexed(m_VtxDesc.low.Position))
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{
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WriteCall(SkipVertex);
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}
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m_native_vtx_decl.stride = nat_offset;
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}
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void VertexLoader::WriteCall(TPipelineFunction func)
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{
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m_PipelineStages[m_numPipelineStages++] = func;
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}
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int VertexLoader::RunVertices(DataReader src, DataReader dst, int count)
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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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m_numLoadedVertices += count;
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m_skippedVertices = 0;
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for (m_remaining = count - 1; m_remaining >= 0; m_remaining--)
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{
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m_tcIndex = 0;
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m_colIndex = 0;
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m_texmtxwrite = m_texmtxread = 0;
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for (int i = 0; i < m_numPipelineStages; i++)
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m_PipelineStages[i](this);
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PRIM_LOG("\n");
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}
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return count - m_skippedVertices;
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}
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