mirror of
https://github.com/dolphin-emu/dolphin
synced 2024-11-04 20:43:44 -05:00
937bb2aa2e
Fixes LIT (https://bugs.dolphin-emu.org/issues/13635). The text does not include normals, but has lighting enabled. With the previous default of (0, 0, 0), lighting was always black (as dot(X, (0, 0, 0)) is always 0). It seems like the normal from the map in the background (0, 0, 1) is re-used. LIT also has the vertex color enabled while vertex color is not specified, the same as SMS's debug cubes; the default MissingColorValue GameINI value of solid white seems to work correctly in this case.
696 lines
26 KiB
C++
696 lines
26 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/VertexShaderGen.h"
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#include "Common/Assert.h"
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#include "Common/CommonTypes.h"
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#include "VideoCommon/BPMemory.h"
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#include "VideoCommon/ConstantManager.h"
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#include "VideoCommon/LightingShaderGen.h"
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#include "VideoCommon/NativeVertexFormat.h"
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#include "VideoCommon/VertexLoaderManager.h"
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#include "VideoCommon/VideoCommon.h"
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#include "VideoCommon/VideoConfig.h"
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#include "VideoCommon/XFMemory.h"
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VertexShaderUid GetVertexShaderUid()
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{
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ASSERT(bpmem.genMode.numtexgens == xfmem.numTexGen.numTexGens);
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ASSERT(bpmem.genMode.numcolchans == xfmem.numChan.numColorChans);
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VertexShaderUid out;
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vertex_shader_uid_data* const uid_data = out.GetUidData();
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uid_data->numTexGens = xfmem.numTexGen.numTexGens;
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uid_data->components = VertexLoaderManager::g_current_components;
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uid_data->numColorChans = xfmem.numChan.numColorChans;
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GetLightingShaderUid(uid_data->lighting);
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// transform texcoords
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for (u32 i = 0; i < uid_data->numTexGens; ++i)
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{
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auto& texinfo = uid_data->texMtxInfo[i];
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texinfo.sourcerow = xfmem.texMtxInfo[i].sourcerow;
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texinfo.texgentype = xfmem.texMtxInfo[i].texgentype;
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texinfo.inputform = xfmem.texMtxInfo[i].inputform;
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// first transformation
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switch (texinfo.texgentype)
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{
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case TexGenType::EmbossMap: // calculate tex coords into bump map
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if ((uid_data->components & (VB_HAS_TANGENT | VB_HAS_BINORMAL)) != 0)
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{
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// transform the light dir into tangent space
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texinfo.embosslightshift = xfmem.texMtxInfo[i].embosslightshift;
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texinfo.embosssourceshift = xfmem.texMtxInfo[i].embosssourceshift;
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}
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else
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{
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texinfo.embosssourceshift = xfmem.texMtxInfo[i].embosssourceshift;
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}
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break;
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case TexGenType::Color0:
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case TexGenType::Color1:
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break;
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case TexGenType::Regular:
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default:
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uid_data->texMtxInfo_n_projection |= static_cast<u32>(xfmem.texMtxInfo[i].projection.Value())
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<< i;
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break;
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}
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uid_data->dualTexTrans_enabled = xfmem.dualTexTrans.enabled;
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// CHECKME: does this only work for regular tex gen types?
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if (uid_data->dualTexTrans_enabled && texinfo.texgentype == TexGenType::Regular)
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{
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auto& postInfo = uid_data->postMtxInfo[i];
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postInfo.index = xfmem.postMtxInfo[i].index;
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postInfo.normalize = xfmem.postMtxInfo[i].normalize;
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}
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}
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return out;
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}
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ShaderCode GenerateVertexShaderCode(APIType api_type, const ShaderHostConfig& host_config,
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const vertex_shader_uid_data* uid_data)
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{
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ShaderCode out;
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const bool per_pixel_lighting = g_ActiveConfig.bEnablePixelLighting;
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const bool msaa = host_config.msaa;
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const bool ssaa = host_config.ssaa;
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const bool vertex_rounding = host_config.vertex_rounding;
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ShaderCode input_extract;
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out.Write("{}", s_lighting_struct);
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// uniforms
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out.Write("UBO_BINDING(std140, 2) uniform VSBlock {{\n");
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out.Write("{}", s_shader_uniforms);
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out.Write("}};\n");
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if (uid_data->vs_expand != VSExpand::None)
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{
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out.Write("UBO_BINDING(std140, 4) uniform GSBlock {{\n");
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out.Write("{}", s_geometry_shader_uniforms);
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out.Write("}};\n");
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if (api_type == APIType::D3D)
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{
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// D3D doesn't include the base vertex in SV_VertexID
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out.Write("UBO_BINDING(std140, 5) uniform DX_Constants {{\n"
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" uint base_vertex;\n"
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"}};\n\n");
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}
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}
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out.Write("struct VS_OUTPUT {{\n");
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GenerateVSOutputMembers(out, api_type, uid_data->numTexGens, host_config, "",
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ShaderStage::Vertex);
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out.Write("}};\n\n");
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WriteIsNanHeader(out, api_type);
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if (uid_data->vs_expand == VSExpand::None)
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{
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out.Write("ATTRIBUTE_LOCATION({:s}) in float4 rawpos;\n", ShaderAttrib::Position);
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if ((uid_data->components & VB_HAS_POSMTXIDX) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in uint4 posmtx;\n", ShaderAttrib::PositionMatrix);
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if ((uid_data->components & VB_HAS_NORMAL) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in float3 rawnormal;\n", ShaderAttrib::Normal);
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if ((uid_data->components & VB_HAS_TANGENT) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in float3 rawtangent;\n", ShaderAttrib::Tangent);
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if ((uid_data->components & VB_HAS_BINORMAL) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in float3 rawbinormal;\n", ShaderAttrib::Binormal);
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if ((uid_data->components & VB_HAS_COL0) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in float4 rawcolor0;\n", ShaderAttrib::Color0);
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if ((uid_data->components & VB_HAS_COL1) != 0)
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out.Write("ATTRIBUTE_LOCATION({:s}) in float4 rawcolor1;\n", ShaderAttrib::Color1);
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for (u32 i = 0; i < 8; ++i)
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{
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const u32 has_texmtx = (uid_data->components & (VB_HAS_TEXMTXIDX0 << i));
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if ((uid_data->components & (VB_HAS_UV0 << i)) != 0 || has_texmtx != 0)
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{
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out.Write("ATTRIBUTE_LOCATION({:s}) in float{} rawtex{};\n", ShaderAttrib::TexCoord0 + i,
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has_texmtx != 0 ? 3 : 2, i);
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}
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}
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}
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else
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{
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// Can't use float3, etc because we want 4-byte alignment
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out.Write(
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"uint4 unpack_ubyte4(uint value) {{\n"
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" return uint4(value & 0xffu, (value >> 8) & 0xffu, (value >> 16) & 0xffu, value >> 24);\n"
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"}}\n\n"
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"struct InputData {{\n");
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if (uid_data->components & VB_HAS_POSMTXIDX)
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{
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out.Write(" uint posmtx;\n");
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input_extract.Write("uint4 posmtx = unpack_ubyte4(i.posmtx);\n");
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}
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if (uid_data->position_has_3_elems)
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{
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out.Write(" float pos0;\n"
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" float pos1;\n"
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" float pos2;\n");
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input_extract.Write("float4 rawpos = float4(i.pos0, i.pos1, i.pos2, 1.0f);\n");
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}
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else
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{
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out.Write(" float pos0;\n"
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" float pos1;\n");
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input_extract.Write("float4 rawpos = float4(i.pos0, i.pos1, 0.0f, 1.0f);\n");
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}
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std::array<std::string_view, 3> names = {"normal", "binormal", "tangent"};
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for (int i = 0; i < 3; i++)
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{
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if (uid_data->components & (VB_HAS_NORMAL << i))
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{
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out.Write(" float {0}0;\n"
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" float {0}1;\n"
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" float {0}2;\n",
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names[i]);
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input_extract.Write("float3 raw{0} = float3(i.{0}0, i.{0}1, i.{0}2);\n", names[i]);
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}
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}
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for (int i = 0; i < 2; i++)
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{
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if (uid_data->components & (VB_HAS_COL0 << i))
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{
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out.Write(" uint color{};\n", i);
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input_extract.Write("float4 rawcolor{0} = float4(unpack_ubyte4(i.color{0})) / 255.0f;\n",
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i);
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}
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}
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for (int i = 0; i < 8; i++)
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{
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if (uid_data->components & (VB_HAS_UV0 << i))
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{
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u32 ncomponents = (uid_data->texcoord_elem_count >> (2 * i)) & 3;
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if (ncomponents < 2)
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{
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out.Write(" float tex{};\n", i);
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input_extract.Write("float3 rawtex{0} = float3(i.tex{0}, 0.0f, 0.0f);\n", i);
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}
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else if (ncomponents == 2)
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{
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out.Write(" float tex{0}_0;\n"
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" float tex{0}_1;\n",
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i);
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input_extract.Write("float3 rawtex{0} = float3(i.tex{0}_0, i.tex{0}_1, 0.0f);\n", i);
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}
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else
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{
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out.Write(" float tex{0}_0;\n"
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" float tex{0}_1;\n"
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" float tex{0}_2;\n",
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i);
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input_extract.Write("float3 rawtex{0} = float3(i.tex{0}_0, i.tex{0}_1, i.tex{0}_2);\n",
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i);
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}
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}
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}
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out.Write("}};\n\n"
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"SSBO_BINDING(1) readonly restrict buffer InputBuffer {{\n"
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" InputData input_buffer[];\n"
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"}};\n\n");
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}
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if (host_config.backend_geometry_shaders)
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{
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out.Write("VARYING_LOCATION(0) out VertexData {{\n");
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GenerateVSOutputMembers(out, api_type, uid_data->numTexGens, host_config,
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GetInterpolationQualifier(msaa, ssaa, true, false),
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ShaderStage::Vertex);
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out.Write("}} vs;\n");
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}
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else
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{
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// Let's set up attributes
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u32 counter = 0;
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out.Write("VARYING_LOCATION({}) {} out float4 colors_0;\n", counter++,
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GetInterpolationQualifier(msaa, ssaa));
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out.Write("VARYING_LOCATION({}) {} out float4 colors_1;\n", counter++,
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GetInterpolationQualifier(msaa, ssaa));
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for (u32 i = 0; i < uid_data->numTexGens; ++i)
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{
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out.Write("VARYING_LOCATION({}) {} out float3 tex{};\n", counter++,
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GetInterpolationQualifier(msaa, ssaa), i);
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}
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if (!host_config.fast_depth_calc)
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{
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out.Write("VARYING_LOCATION({}) {} out float4 clipPos;\n", counter++,
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GetInterpolationQualifier(msaa, ssaa));
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}
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if (per_pixel_lighting)
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{
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out.Write("VARYING_LOCATION({}) {} out float3 Normal;\n", counter++,
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GetInterpolationQualifier(msaa, ssaa));
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out.Write("VARYING_LOCATION({}) {} out float3 WorldPos;\n", counter++,
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GetInterpolationQualifier(msaa, ssaa));
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}
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}
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out.Write("void main()\n{{\n");
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if (uid_data->vs_expand != VSExpand::None)
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{
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out.Write("bool is_bottom = (gl_VertexID & 2) != 0;\n"
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"bool is_right = (gl_VertexID & 1) != 0;\n");
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// D3D doesn't include the base vertex in SV_VertexID
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// See comment in UberShaderVertex for details
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if (api_type == APIType::D3D)
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out.Write("uint vertex_id = (gl_VertexID >> 2) + base_vertex;\n");
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else
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out.Write("uint vertex_id = uint(gl_VertexID) >> 2u;\n");
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out.Write("InputData i = input_buffer[vertex_id];\n"
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"{}",
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input_extract.GetBuffer());
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}
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out.Write("VS_OUTPUT o;\n");
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// xfmem.numColorChans controls the number of color channels available to TEV, but we still need
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// to generate all channels here, as it can be used in texgen. Cel-damage is an example of this.
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out.Write("float4 vertex_color_0, vertex_color_1;\n");
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// To use color 1, the vertex descriptor must have color 0 and 1.
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// If color 1 is present but not color 0, it is used for lighting channel 0.
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const bool use_color_1 =
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(uid_data->components & (VB_HAS_COL0 | VB_HAS_COL1)) == (VB_HAS_COL0 | VB_HAS_COL1);
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for (u32 color = 0; color < NUM_XF_COLOR_CHANNELS; color++)
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{
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if ((color == 0 || use_color_1) && (uid_data->components & (VB_HAS_COL0 << color)) != 0)
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{
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// Use color0 for channel 0, and color1 for channel 1 if both colors 0 and 1 are present.
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out.Write("vertex_color_{0} = rawcolor{0};\n", color);
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}
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else if (color == 0 && (uid_data->components & VB_HAS_COL1) != 0)
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{
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// Use color1 for channel 0 if color0 is not present.
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out.Write("vertex_color_{} = rawcolor1;\n", color);
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}
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else
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{
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out.Write("vertex_color_{0} = missing_color_value;\n", color);
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}
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}
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// transforms
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if ((uid_data->components & VB_HAS_POSMTXIDX) != 0)
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{
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// Vertex format has a per-vertex matrix
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out.Write("int posidx = int(posmtx.r);\n"
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"float4 P0 = " I_TRANSFORMMATRICES "[posidx];\n"
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"float4 P1 = " I_TRANSFORMMATRICES "[posidx + 1];\n"
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"float4 P2 = " I_TRANSFORMMATRICES "[posidx + 2];\n"
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"int normidx = posidx & 31;\n"
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"float3 N0 = " I_NORMALMATRICES "[normidx].xyz;\n"
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"float3 N1 = " I_NORMALMATRICES "[normidx + 1].xyz;\n"
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"float3 N2 = " I_NORMALMATRICES "[normidx + 2].xyz;\n");
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}
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else
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{
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// One shared matrix
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out.Write("float4 P0 = " I_POSNORMALMATRIX "[0];\n"
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"float4 P1 = " I_POSNORMALMATRIX "[1];\n"
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"float4 P2 = " I_POSNORMALMATRIX "[2];\n"
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"float3 N0 = " I_POSNORMALMATRIX "[3].xyz;\n"
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"float3 N1 = " I_POSNORMALMATRIX "[4].xyz;\n"
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"float3 N2 = " I_POSNORMALMATRIX "[5].xyz;\n");
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}
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out.Write("// Multiply the position vector by the position matrix\n"
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"float4 pos = float4(dot(P0, rawpos), dot(P1, rawpos), dot(P2, rawpos), 1.0);\n");
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if ((uid_data->components & VB_HAS_NORMAL) == 0)
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out.Write("float3 rawnormal = " I_CACHED_NORMAL ".xyz;\n");
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if ((uid_data->components & VB_HAS_TANGENT) == 0)
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out.Write("float3 rawtangent = " I_CACHED_TANGENT ".xyz;\n");
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if ((uid_data->components & VB_HAS_BINORMAL) == 0)
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out.Write("float3 rawbinormal = " I_CACHED_BINORMAL ".xyz;\n");
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// The scale of the transform matrix is used to control the size of the emboss map effect, by
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// changing the scale of the transformed binormals (which only get used by emboss map texgens).
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// By normalising the first transformed normal (which is used by lighting calculations and needs
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// to be unit length), the same transform matrix can do double duty, scaling for emboss mapping,
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// and not scaling for lighting.
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out.Write("float3 _normal = normalize(float3(dot(N0, rawnormal), dot(N1, rawnormal), dot(N2, "
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"rawnormal)));\n"
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"float3 _tangent = float3(dot(N0, rawtangent), dot(N1, rawtangent), dot(N2, "
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"rawtangent));\n"
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"float3 _binormal = float3(dot(N0, rawbinormal), dot(N1, rawbinormal), dot(N2, "
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"rawbinormal));\n");
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out.Write("o.pos = float4(dot(" I_PROJECTION "[0], pos), dot(" I_PROJECTION
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"[1], pos), dot(" I_PROJECTION "[2], pos), dot(" I_PROJECTION "[3], pos));\n");
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out.Write("int4 lacc;\n"
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"float3 ldir, h, cosAttn, distAttn;\n"
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"float dist, dist2, attn;\n");
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GenerateLightingShaderCode(out, uid_data->lighting, "vertex_color_", "o.colors_");
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// transform texcoords
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out.Write("float4 coord = float4(0.0, 0.0, 1.0, 1.0);\n");
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for (u32 i = 0; i < uid_data->numTexGens; ++i)
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{
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auto& texinfo = uid_data->texMtxInfo[i];
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out.Write("{{\n");
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out.Write("coord = float4(0.0, 0.0, 1.0, 1.0);\n");
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switch (texinfo.sourcerow)
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{
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case SourceRow::Geom:
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out.Write("coord.xyz = rawpos.xyz;\n");
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break;
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case SourceRow::Normal:
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if ((uid_data->components & VB_HAS_NORMAL) != 0)
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{
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out.Write("coord.xyz = rawnormal.xyz;\n");
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}
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break;
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case SourceRow::Colors:
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ASSERT(texinfo.texgentype == TexGenType::Color0 || texinfo.texgentype == TexGenType::Color1);
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break;
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case SourceRow::BinormalT:
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if ((uid_data->components & VB_HAS_TANGENT) != 0)
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{
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out.Write("coord.xyz = rawtangent.xyz;\n");
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}
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break;
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case SourceRow::BinormalB:
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if ((uid_data->components & VB_HAS_BINORMAL) != 0)
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{
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out.Write("coord.xyz = rawbinormal.xyz;\n");
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}
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break;
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default:
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ASSERT(texinfo.sourcerow >= SourceRow::Tex0 && texinfo.sourcerow <= SourceRow::Tex7);
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u32 texnum = static_cast<u32>(texinfo.sourcerow) - static_cast<u32>(SourceRow::Tex0);
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if ((uid_data->components & (VB_HAS_UV0 << (texnum))) != 0)
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{
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out.Write("coord = float4(rawtex{}.x, rawtex{}.y, 1.0, 1.0);\n", texnum, texnum);
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}
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break;
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}
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// Input form of AB11 sets z element to 1.0
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if (texinfo.inputform == TexInputForm::AB11)
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out.Write("coord.z = 1.0;\n");
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// Convert NaNs to 1 - needed to fix eyelids in Shadow the Hedgehog during cutscenes
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// See https://bugs.dolphin-emu.org/issues/11458
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out.Write("// Convert NaN to 1\n");
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out.Write("if (dolphin_isnan(coord.x)) coord.x = 1.0;\n");
|
|
out.Write("if (dolphin_isnan(coord.y)) coord.y = 1.0;\n");
|
|
out.Write("if (dolphin_isnan(coord.z)) coord.z = 1.0;\n");
|
|
|
|
// first transformation
|
|
switch (texinfo.texgentype)
|
|
{
|
|
case TexGenType::EmbossMap: // calculate tex coords into bump map
|
|
|
|
// transform the light dir into tangent space
|
|
out.Write("ldir = normalize(" LIGHT_POS ".xyz - pos.xyz);\n",
|
|
LIGHT_POS_PARAMS(texinfo.embosslightshift));
|
|
out.Write(
|
|
"o.tex{}.xyz = o.tex{}.xyz + float3(dot(ldir, _tangent), dot(ldir, _binormal), 0.0);\n",
|
|
i, texinfo.embosssourceshift);
|
|
|
|
break;
|
|
case TexGenType::Color0:
|
|
out.Write("o.tex{}.xyz = float3(o.colors_0.x, o.colors_0.y, 1);\n", i);
|
|
break;
|
|
case TexGenType::Color1:
|
|
out.Write("o.tex{}.xyz = float3(o.colors_1.x, o.colors_1.y, 1);\n", i);
|
|
break;
|
|
case TexGenType::Regular:
|
|
default:
|
|
if ((uid_data->components & (VB_HAS_TEXMTXIDX0 << i)) != 0)
|
|
{
|
|
out.Write("int tmp = int(rawtex{}.z);\n", i);
|
|
if (static_cast<TexSize>((uid_data->texMtxInfo_n_projection >> i) & 1) == TexSize::STQ)
|
|
{
|
|
out.Write("o.tex{}.xyz = float3(dot(coord, " I_TRANSFORMMATRICES
|
|
"[tmp]), dot(coord, " I_TRANSFORMMATRICES
|
|
"[tmp+1]), dot(coord, " I_TRANSFORMMATRICES "[tmp+2]));\n",
|
|
i);
|
|
}
|
|
else
|
|
{
|
|
out.Write("o.tex{}.xyz = float3(dot(coord, " I_TRANSFORMMATRICES
|
|
"[tmp]), dot(coord, " I_TRANSFORMMATRICES "[tmp+1]), 1);\n",
|
|
i);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (static_cast<TexSize>((uid_data->texMtxInfo_n_projection >> i) & 1) == TexSize::STQ)
|
|
{
|
|
out.Write("o.tex{}.xyz = float3(dot(coord, " I_TEXMATRICES
|
|
"[{}]), dot(coord, " I_TEXMATRICES "[{}]), dot(coord, " I_TEXMATRICES
|
|
"[{}]));\n",
|
|
i, 3 * i, 3 * i + 1, 3 * i + 2);
|
|
}
|
|
else
|
|
{
|
|
out.Write("o.tex{}.xyz = float3(dot(coord, " I_TEXMATRICES
|
|
"[{}]), dot(coord, " I_TEXMATRICES "[{}]), 1);\n",
|
|
i, 3 * i, 3 * i + 1);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
// CHECKME: does this only work for regular tex gen types?
|
|
if (uid_data->dualTexTrans_enabled && texinfo.texgentype == TexGenType::Regular)
|
|
{
|
|
auto& postInfo = uid_data->postMtxInfo[i];
|
|
|
|
out.Write("float4 P0 = " I_POSTTRANSFORMMATRICES "[{}];\n"
|
|
"float4 P1 = " I_POSTTRANSFORMMATRICES "[{}];\n"
|
|
"float4 P2 = " I_POSTTRANSFORMMATRICES "[{}];\n",
|
|
postInfo.index & 0x3f, (postInfo.index + 1) & 0x3f, (postInfo.index + 2) & 0x3f);
|
|
|
|
if (postInfo.normalize)
|
|
out.Write("o.tex{}.xyz = normalize(o.tex{}.xyz);\n", i, i);
|
|
|
|
// multiply by postmatrix
|
|
out.Write(
|
|
"o.tex{0}.xyz = float3(dot(P0.xyz, o.tex{0}.xyz) + P0.w, dot(P1.xyz, o.tex{0}.xyz) + "
|
|
"P1.w, dot(P2.xyz, o.tex{0}.xyz) + P2.w);\n",
|
|
i);
|
|
}
|
|
|
|
// When q is 0, the GameCube appears to have a special case
|
|
// This can be seen in devkitPro's neheGX Lesson08 example for Wii
|
|
// Makes differences in Rogue Squadron 3 (Hoth sky) and The Last Story (shadow culling)
|
|
// TODO: check if this only affects XF_TEXGEN_REGULAR
|
|
if (texinfo.texgentype == TexGenType::Regular)
|
|
{
|
|
out.Write(
|
|
"if(o.tex{0}.z == 0.0f)\n"
|
|
"\to.tex{0}.xy = clamp(o.tex{0}.xy / 2.0f, float2(-1.0f,-1.0f), float2(1.0f,1.0f));\n",
|
|
i);
|
|
}
|
|
|
|
out.Write("}}\n");
|
|
}
|
|
|
|
if (uid_data->vs_expand == VSExpand::Line)
|
|
{
|
|
out.Write("// Line expansion\n"
|
|
"uint other_id = vertex_id;\n"
|
|
"if (is_bottom) {{\n"
|
|
" other_id -= 1u;\n"
|
|
"}} else {{\n"
|
|
" other_id += 1u;\n"
|
|
"}}\n"
|
|
"InputData other = input_buffer[other_id];\n");
|
|
if (uid_data->position_has_3_elems)
|
|
out.Write("float4 other_pos = float4(other.pos0, other.pos1, other.pos2, 1.0f);\n");
|
|
else
|
|
out.Write("float4 other_pos = float4(other.pos0, other.pos1, 0.0f, 1.0f);\n");
|
|
if (uid_data->components & VB_HAS_POSMTXIDX)
|
|
{
|
|
out.Write("uint other_posidx = other.posmtx & 0xff;\n"
|
|
"float4 other_p0 = " I_TRANSFORMMATRICES "[other_posidx];\n"
|
|
"float4 other_p1 = " I_TRANSFORMMATRICES "[other_posidx + 1];\n"
|
|
"float4 other_p2 = " I_TRANSFORMMATRICES "[other_posidx + 2];\n"
|
|
"other_pos = float4(dot(other_p0, other_pos), dot(other_p1, other_pos), "
|
|
"dot(other_p2, other_pos), 1.0f);\n");
|
|
}
|
|
else
|
|
{
|
|
out.Write("other_pos = float4(dot(P0, other_pos), dot(P1, other_pos), dot(P2, other_pos), "
|
|
"1.0f);\n");
|
|
}
|
|
GenerateVSLineExpansion(out, "", uid_data->numTexGens);
|
|
}
|
|
else if (uid_data->vs_expand == VSExpand::Point)
|
|
{
|
|
out.Write("// Point expansion\n");
|
|
GenerateVSPointExpansion(out, "", uid_data->numTexGens);
|
|
}
|
|
|
|
if (per_pixel_lighting)
|
|
{
|
|
// When per-pixel lighting is enabled, the vertex colors are passed through
|
|
// unmodified so we can evaluate the lighting in the pixel shader.
|
|
|
|
// Lighting is also still computed in the vertex shader since it can be used to
|
|
// generate texture coordinates. We generated them above, so now the colors can
|
|
// be reverted to their previous stage.
|
|
out.Write("o.colors_0 = vertex_color_0;\n");
|
|
out.Write("o.colors_1 = vertex_color_1;\n");
|
|
// Note that the numColorChans logic is performed in the pixel shader.
|
|
}
|
|
else
|
|
{
|
|
// The number of colors available to TEV is determined by numColorChans.
|
|
// We have to provide the fields to match the interface, so set to zero if it's not enabled.
|
|
if (uid_data->numColorChans == 0)
|
|
out.Write("o.colors_0 = float4(0.0, 0.0, 0.0, 0.0);\n");
|
|
if (uid_data->numColorChans <= 1)
|
|
out.Write("o.colors_1 = float4(0.0, 0.0, 0.0, 0.0);\n");
|
|
}
|
|
|
|
// clipPos/w needs to be done in pixel shader, not here
|
|
if (!host_config.fast_depth_calc)
|
|
out.Write("o.clipPos = o.pos;\n");
|
|
|
|
if (per_pixel_lighting)
|
|
{
|
|
out.Write("o.Normal = _normal;\n"
|
|
"o.WorldPos = pos.xyz;\n");
|
|
}
|
|
|
|
// If we can disable the incorrect depth clipping planes using depth clamping, then we can do
|
|
// our own depth clipping and calculate the depth range before the perspective divide if
|
|
// necessary.
|
|
if (host_config.backend_depth_clamp)
|
|
{
|
|
// Since we're adjusting z for the depth range before the perspective divide, we have to do our
|
|
// own clipping. We want to clip so that -w <= z <= 0, which matches the console -1..0 range.
|
|
// We adjust our depth value for clipping purposes to match the perspective projection in the
|
|
// software backend, which is a hack to fix Sonic Adventure and Unleashed games.
|
|
out.Write("float clipDepth = o.pos.z * (1.0 - 1e-7);\n"
|
|
"float clipDist0 = clipDepth + o.pos.w;\n" // Near: z < -w
|
|
"float clipDist1 = -clipDepth;\n"); // Far: z > 0
|
|
|
|
if (host_config.backend_geometry_shaders)
|
|
{
|
|
out.Write("o.clipDist0 = clipDist0;\n"
|
|
"o.clipDist1 = clipDist1;\n");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Same depth adjustment for Sonic. Without depth clamping, it unfortunately
|
|
// affects non-clipping uses of depth too.
|
|
out.Write("o.pos.z = o.pos.z * (1.0 - 1e-7);\n");
|
|
}
|
|
|
|
// Write the true depth value. If the game uses depth textures, then the pixel shader will
|
|
// override it with the correct values if not then early z culling will improve speed.
|
|
// There are two different ways to do this, when the depth range is oversized, we process
|
|
// the depth range in the vertex shader, if not we let the host driver handle it.
|
|
//
|
|
// Adjust z for the depth range. We're using an equation which incorperates a depth inversion,
|
|
// so we can map the console -1..0 range to the 0..1 range used in the depth buffer.
|
|
// We have to handle the depth range in the vertex shader instead of after the perspective
|
|
// divide, because some games will use a depth range larger than what is allowed by the
|
|
// graphics API. These large depth ranges will still be clipped to the 0..1 range, so these
|
|
// games effectively add a depth bias to the values written to the depth buffer.
|
|
out.Write("o.pos.z = o.pos.w * " I_PIXELCENTERCORRECTION ".w - "
|
|
"o.pos.z * " I_PIXELCENTERCORRECTION ".z;\n");
|
|
|
|
if (!host_config.backend_clip_control)
|
|
{
|
|
// If the graphics API doesn't support a depth range of 0..1, then we need to map z to
|
|
// the -1..1 range. Unfortunately we have to use a substraction, which is a lossy floating-point
|
|
// operation that can introduce a round-trip error.
|
|
out.Write("o.pos.z = o.pos.z * 2.0 - o.pos.w;\n");
|
|
}
|
|
|
|
// Correct for negative viewports by mirroring all vertices. We need to negate the height here,
|
|
// since the viewport height is already negated by the render backend.
|
|
out.Write("o.pos.xy *= sign(" I_PIXELCENTERCORRECTION ".xy * float2(1.0, -1.0));\n");
|
|
|
|
// The console GPU places the pixel center at 7/12 in screen space unless
|
|
// antialiasing is enabled, while D3D and OpenGL place it at 0.5. This results
|
|
// in some primitives being placed one pixel too far to the bottom-right,
|
|
// which in turn can be critical if it happens for clear quads.
|
|
// Hence, we compensate for this pixel center difference so that primitives
|
|
// get rasterized correctly.
|
|
out.Write("o.pos.xy = o.pos.xy - o.pos.w * " I_PIXELCENTERCORRECTION ".xy;\n");
|
|
|
|
if (vertex_rounding)
|
|
{
|
|
// By now our position is in clip space
|
|
// however, higher resolutions than the Wii outputs
|
|
// cause an additional pixel offset
|
|
// due to a higher pixel density
|
|
// we need to correct this by converting our
|
|
// clip-space position into the Wii's screen-space
|
|
// acquire the right pixel and then convert it back
|
|
out.Write("if (o.pos.w == 1.0f)\n"
|
|
"{{\n"
|
|
|
|
"\tfloat ss_pixel_x = ((o.pos.x + 1.0f) * (" I_VIEWPORT_SIZE ".x * 0.5f));\n"
|
|
"\tfloat ss_pixel_y = ((o.pos.y + 1.0f) * (" I_VIEWPORT_SIZE ".y * 0.5f));\n"
|
|
|
|
"\tss_pixel_x = round(ss_pixel_x);\n"
|
|
"\tss_pixel_y = round(ss_pixel_y);\n"
|
|
|
|
"\to.pos.x = ((ss_pixel_x / (" I_VIEWPORT_SIZE ".x * 0.5f)) - 1.0f);\n"
|
|
"\to.pos.y = ((ss_pixel_y / (" I_VIEWPORT_SIZE ".y * 0.5f)) - 1.0f);\n"
|
|
"}}\n");
|
|
}
|
|
|
|
if (host_config.backend_geometry_shaders)
|
|
{
|
|
AssignVSOutputMembers(out, "vs", "o", uid_data->numTexGens, host_config);
|
|
}
|
|
else
|
|
{
|
|
// TODO: Pass interface blocks between shader stages even if geometry shaders
|
|
// are not supported, however that will require at least OpenGL 3.2 support.
|
|
for (u32 i = 0; i < uid_data->numTexGens; ++i)
|
|
out.Write("tex{}.xyz = o.tex{};\n", i, i);
|
|
if (!host_config.fast_depth_calc)
|
|
out.Write("clipPos = o.clipPos;\n");
|
|
if (per_pixel_lighting)
|
|
{
|
|
out.Write("Normal = o.Normal;\n"
|
|
"WorldPos = o.WorldPos;\n");
|
|
}
|
|
out.Write("colors_0 = o.colors_0;\n"
|
|
"colors_1 = o.colors_1;\n");
|
|
}
|
|
|
|
if (host_config.backend_depth_clamp)
|
|
{
|
|
out.Write("gl_ClipDistance[0] = clipDist0;\n"
|
|
"gl_ClipDistance[1] = clipDist1;\n");
|
|
}
|
|
|
|
// Vulkan NDC space has Y pointing down (right-handed NDC space).
|
|
if (api_type == APIType::Vulkan)
|
|
out.Write("gl_Position = float4(o.pos.x, -o.pos.y, o.pos.z, o.pos.w);\n");
|
|
else
|
|
out.Write("gl_Position = o.pos;\n");
|
|
out.Write("}}\n");
|
|
|
|
return out;
|
|
}
|