mirror of
https://github.com/dolphin-emu/dolphin.git
synced 2024-11-15 13:57:57 -07:00
f339bc69c8
debaf63fe8 moved the "Sonic epsilon hack"
to vertex shaders. However, it was only done for targets with depth
clamping. If this is not available, for example the target is OpenGL ES,
the Sonic problem appears (https://bugs.dolphin-emu.org/issues/11897).
A version of the "Sonic epsilon hack" is added for targets without
depth clamping.
608 lines
23 KiB
C++
608 lines
23 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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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/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_NRM1 | VB_HAS_NRM2)) != 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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out.Write("{}", s_lighting_struct);
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// uniforms
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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out.Write("UBO_BINDING(std140, 2) uniform VSBlock {{\n");
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else
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out.Write("cbuffer VSBlock {{\n");
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out.Write("{}", s_shader_uniforms);
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out.Write("}};\n");
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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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out.Write("}};\n");
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if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
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{
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out.Write("ATTRIBUTE_LOCATION({}) in float4 rawpos;\n", SHADER_POSITION_ATTRIB);
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if ((uid_data->components & VB_HAS_POSMTXIDX) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in uint4 posmtx;\n", SHADER_POSMTX_ATTRIB);
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if ((uid_data->components & VB_HAS_NRM0) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm0;\n", SHADER_NORM0_ATTRIB);
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if ((uid_data->components & VB_HAS_NRM1) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm1;\n", SHADER_NORM1_ATTRIB);
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if ((uid_data->components & VB_HAS_NRM2) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in float3 rawnorm2;\n", SHADER_NORM2_ATTRIB);
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if ((uid_data->components & VB_HAS_COL0) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in float4 rawcolor0;\n", SHADER_COLOR0_ATTRIB);
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if ((uid_data->components & VB_HAS_COL1) != 0)
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out.Write("ATTRIBUTE_LOCATION({}) in float4 rawcolor1;\n", SHADER_COLOR1_ATTRIB);
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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({}) in float{} rawtex{};\n", SHADER_TEXTURE0_ATTRIB + i,
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has_texmtx != 0 ? 3 : 2, i);
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}
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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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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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}
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else // D3D
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{
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out.Write("VS_OUTPUT main(\n");
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// inputs
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if ((uid_data->components & VB_HAS_NRM0) != 0)
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out.Write(" float3 rawnorm0 : NORMAL0,\n");
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if ((uid_data->components & VB_HAS_NRM1) != 0)
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out.Write(" float3 rawnorm1 : NORMAL1,\n");
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if ((uid_data->components & VB_HAS_NRM2) != 0)
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out.Write(" float3 rawnorm2 : NORMAL2,\n");
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if ((uid_data->components & VB_HAS_COL0) != 0)
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out.Write(" float4 rawcolor0 : COLOR0,\n");
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if ((uid_data->components & VB_HAS_COL1) != 0)
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out.Write(" float4 rawcolor1 : COLOR1,\n");
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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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out.Write(" float{} rawtex{} : TEXCOORD{},\n", has_texmtx ? 3 : 2, i, i);
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}
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if ((uid_data->components & VB_HAS_POSMTXIDX) != 0)
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out.Write(" uint4 posmtx : BLENDINDICES,\n");
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out.Write(" float4 rawpos : POSITION) {{\n");
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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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// The default alpha channel depends on the number of components in the vertex format.
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out.Write(
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"vertex_color_{0} = float4(1.0, 1.0, 1.0, float((color_chan_alpha >> {0}) & 1u));\n",
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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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out.Write("int posidx = int(posmtx.r);\n"
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"float4 pos = float4(dot(" I_TRANSFORMMATRICES
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"[posidx], rawpos), dot(" I_TRANSFORMMATRICES
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"[posidx+1], rawpos), dot(" I_TRANSFORMMATRICES "[posidx+2], rawpos), 1);\n");
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if ((uid_data->components & VB_HAS_NRMALL) != 0)
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{
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out.Write("int normidx = posidx & 31;\n"
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"float3 N0 = " I_NORMALMATRICES "[normidx].xyz, N1 = " I_NORMALMATRICES
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"[normidx+1].xyz, N2 = " I_NORMALMATRICES "[normidx+2].xyz;\n");
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}
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if ((uid_data->components & VB_HAS_NRM0) != 0)
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{
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out.Write("float3 _norm0 = normalize(float3(dot(N0, rawnorm0), dot(N1, rawnorm0), dot(N2, "
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"rawnorm0)));\n");
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}
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if ((uid_data->components & VB_HAS_NRM1) != 0)
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{
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out.Write(
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"float3 _norm1 = float3(dot(N0, rawnorm1), dot(N1, rawnorm1), dot(N2, rawnorm1));\n");
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}
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if ((uid_data->components & VB_HAS_NRM2) != 0)
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{
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out.Write(
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"float3 _norm2 = float3(dot(N0, rawnorm2), dot(N1, rawnorm2), dot(N2, rawnorm2));\n");
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}
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}
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else
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{
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out.Write("float4 pos = float4(dot(" I_POSNORMALMATRIX "[0], rawpos), dot(" I_POSNORMALMATRIX
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"[1], rawpos), dot(" I_POSNORMALMATRIX "[2], rawpos), 1.0);\n");
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if ((uid_data->components & VB_HAS_NRM0) != 0)
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{
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out.Write("float3 _norm0 = normalize(float3(dot(" I_POSNORMALMATRIX
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"[3].xyz, rawnorm0), dot(" I_POSNORMALMATRIX
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"[4].xyz, rawnorm0), dot(" I_POSNORMALMATRIX "[5].xyz, rawnorm0)));\n");
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}
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if ((uid_data->components & VB_HAS_NRM1) != 0)
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{
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out.Write("float3 _norm1 = float3(dot(" I_POSNORMALMATRIX
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"[3].xyz, rawnorm1), dot(" I_POSNORMALMATRIX
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"[4].xyz, rawnorm1), dot(" I_POSNORMALMATRIX "[5].xyz, rawnorm1));\n");
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}
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if ((uid_data->components & VB_HAS_NRM2) != 0)
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{
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out.Write("float3 _norm2 = float3(dot(" I_POSNORMALMATRIX
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"[3].xyz, rawnorm2), dot(" I_POSNORMALMATRIX
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"[4].xyz, rawnorm2), dot(" I_POSNORMALMATRIX "[5].xyz, rawnorm2));\n");
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}
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}
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if ((uid_data->components & VB_HAS_NRM0) == 0)
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out.Write("float3 _norm0 = float3(0.0, 0.0, 0.0);\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_NRM0) != 0)
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{
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out.Write("coord.xyz = rawnorm0.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_NRM1) != 0)
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{
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out.Write("coord.xyz = rawnorm1.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_NRM2) != 0)
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{
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out.Write("coord.xyz = rawnorm2.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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// 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_NRM1 | VB_HAS_NRM2)) != 0)
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{
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// transform the light dir into tangent space
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out.Write("ldir = normalize(" LIGHT_POS ".xyz - pos.xyz);\n",
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LIGHT_POS_PARAMS(texinfo.embosslightshift));
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out.Write(
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"o.tex{}.xyz = o.tex{}.xyz + float3(dot(ldir, _norm1), dot(ldir, _norm2), 0.0);\n", i,
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texinfo.embosssourceshift);
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}
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else
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{
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// The following assert was triggered in House of the Dead Overkill and Star Wars Rogue
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// Squadron 2
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// ASSERT(0); // should have normals
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out.Write("o.tex{}.xyz = o.tex{}.xyz;\n", i, texinfo.embosssourceshift);
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}
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break;
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case TexGenType::Color0:
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out.Write("o.tex{}.xyz = float3(o.colors_0.x, o.colors_0.y, 1);\n", i);
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break;
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case TexGenType::Color1:
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out.Write("o.tex{}.xyz = float3(o.colors_1.x, o.colors_1.y, 1);\n", i);
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break;
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case TexGenType::Regular:
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default:
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if ((uid_data->components & (VB_HAS_TEXMTXIDX0 << i)) != 0)
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{
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out.Write("int tmp = int(rawtex{}.z);\n", i);
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if (static_cast<TexSize>((uid_data->texMtxInfo_n_projection >> i) & 1) == TexSize::STQ)
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{
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out.Write("o.tex{}.xyz = float3(dot(coord, " I_TRANSFORMMATRICES
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"[tmp]), dot(coord, " I_TRANSFORMMATRICES
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"[tmp+1]), dot(coord, " I_TRANSFORMMATRICES "[tmp+2]));\n",
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i);
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}
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else
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{
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out.Write("o.tex{}.xyz = float3(dot(coord, " I_TRANSFORMMATRICES
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"[tmp]), dot(coord, " I_TRANSFORMMATRICES "[tmp+1]), 1);\n",
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i);
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}
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}
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else
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{
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if (static_cast<TexSize>((uid_data->texMtxInfo_n_projection >> i) & 1) == TexSize::STQ)
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{
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out.Write("o.tex{}.xyz = float3(dot(coord, " I_TEXMATRICES
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"[{}]), dot(coord, " I_TEXMATRICES "[{}]), dot(coord, " I_TEXMATRICES
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"[{}]));\n",
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i, 3 * i, 3 * i + 1, 3 * i + 2);
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}
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else
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{
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out.Write("o.tex{}.xyz = float3(dot(coord, " I_TEXMATRICES
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"[{}]), dot(coord, " I_TEXMATRICES "[{}]), 1);\n",
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i, 3 * i, 3 * i + 1);
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}
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}
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break;
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}
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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];
|
|
|
|
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->numColorChans == 0)
|
|
{
|
|
if ((uid_data->components & VB_HAS_COL0) != 0)
|
|
out.Write("o.colors_0 = rawcolor0;\n");
|
|
else
|
|
out.Write("o.colors_0 = float4(1.0, 1.0, 1.0, 1.0);\n");
|
|
}
|
|
if (uid_data->numColorChans < 2)
|
|
{
|
|
if ((uid_data->components & VB_HAS_COL1) != 0)
|
|
out.Write("o.colors_1 = rawcolor1;\n");
|
|
else
|
|
out.Write("o.colors_1 = o.colors_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 = _norm0;\n"
|
|
"o.WorldPos = pos.xyz;\n");
|
|
|
|
// Pass through the vertex colors unmodified so we can evaluate the lighting in the same manner.
|
|
if ((uid_data->components & VB_HAS_COL0) != 0)
|
|
out.Write("o.colors_0 = vertex_color_0;\n");
|
|
|
|
if ((uid_data->components & VB_HAS_COL1) != 0)
|
|
out.Write("o.colors_1 = vertex_color_1;\n");
|
|
}
|
|
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");
|
|
}
|
|
|
|
// 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 (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
|
|
{
|
|
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");
|
|
}
|
|
else // D3D
|
|
{
|
|
out.Write("return o;\n");
|
|
}
|
|
out.Write("}}\n");
|
|
|
|
return out;
|
|
}
|