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Add configurable toggle that rounds vertices to the nearest pixel when

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w=1.  This fixes some games at higher IRs.
This commit is contained in:
iwubcode
2017-02-18 18:22:41 -06:00
parent 840e58c032
commit a9d08a31a6
9 changed files with 68 additions and 4 deletions
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1
Source/Core/VideoCommon/ConstantManager.h
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@ -45,6 +45,7 @@ struct VertexShaderConstants
float4 normalmatrices[32];
float4 posttransformmatrices[64];
float4 pixelcentercorrection;
float4 viewport;
};
struct GeometryShaderConstants

4
Source/Core/VideoCommon/ShaderGenCommon.h
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@ -275,6 +275,7 @@ inline const char* GetInterpolationQualifier(bool msaa, bool ssaa,
#define I_NORMALMATRICES "cnmtx"
#define I_POSTTRANSFORMMATRICES "cpostmtx"
#define I_PIXELCENTERCORRECTION "cpixelcenter"
#define I_VIEWPORT_SIZE "cviewport"
#define I_STEREOPARAMS "cstereo"
#define I_LINEPTPARAMS "clinept"
@ -288,4 +289,5 @@ static const char s_shader_uniforms[] = "\tfloat4 " I_POSNORMALMATRIX "[6];\n"
"\tfloat4 " I_TRANSFORMMATRICES "[64];\n"
"\tfloat4 " I_NORMALMATRICES "[32];\n"
"\tfloat4 " I_POSTTRANSFORMMATRICES "[64];\n"
"\tfloat4 " I_PIXELCENTERCORRECTION ";\n";
"\tfloat4 " I_PIXELCENTERCORRECTION ";\n"
"\tfloat2 " I_VIEWPORT_SIZE ";\n";

25
Source/Core/VideoCommon/VertexShaderGen.cpp
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@ -28,6 +28,8 @@ VertexShaderUid GetVertexShaderUid()
uid_data->numTexGens = xfmem.numTexGen.numTexGens;
uid_data->components = VertexLoaderManager::g_current_components;
uid_data->pixel_lighting = g_ActiveConfig.bEnablePixelLighting;
uid_data->vertex_rounding =
g_ActiveConfig.bVertexRounding && g_ActiveConfig.iEFBScale != SCALE_1X;
uid_data->msaa = g_ActiveConfig.iMultisamples > 1;
uid_data->ssaa = g_ActiveConfig.iMultisamples > 1 && g_ActiveConfig.bSSAA;
uid_data->numColorChans = xfmem.numChan.numColorChans;
@ -465,6 +467,29 @@ ShaderCode GenerateVertexShaderCode(APIType api_type, const vertex_shader_uid_da
// get rasterized correctly.
out.Write("o.pos.xy = o.pos.xy - o.pos.w * " I_PIXELCENTERCORRECTION ".xy;\n");
if (uid_data->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");
out.Write("{\n");
out.Write("\tfloat ss_pixel_x = ((o.pos.x + 1.0f) * (" I_VIEWPORT_SIZE ".x * 0.5f));\n");
out.Write("\tfloat ss_pixel_y = ((o.pos.y + 1.0f) * (" I_VIEWPORT_SIZE ".y * 0.5f));\n");
out.Write("\tss_pixel_x = round(ss_pixel_x);\n");
out.Write("\tss_pixel_y = round(ss_pixel_y);\n");
out.Write("\to.pos.x = ((ss_pixel_x / (" I_VIEWPORT_SIZE ".x * 0.5f)) - 1.0f);\n");
out.Write("\to.pos.y = ((ss_pixel_y / (" I_VIEWPORT_SIZE ".y * 0.5f)) - 1.0f);\n");
out.Write("}\n");
}
if (api_type == APIType::OpenGL || api_type == APIType::Vulkan)
{
if (g_ActiveConfig.backend_info.bSupportsGeometryShaders || api_type == APIType::Vulkan)

3
Source/Core/VideoCommon/VertexShaderGen.h
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@ -43,7 +43,8 @@ struct vertex_shader_uid_data
u32 texMtxInfo_n_projection : 16; // Stored separately to guarantee that the texMtxInfo struct is
// 8 bits wide
u32 ssaa : 1;
u32 pad : 15;
u32 vertex_rounding : 1;
u32 pad : 14;
struct
{

15
Source/Core/VideoCommon/VertexShaderManager.cpp
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@ -382,8 +382,16 @@ void VertexShaderManager::SetConstants()
// NOTE: If we ever emulate antialiasing, the sample locations set by
// BP registers 0x01-0x04 need to be considered here.
const float pixel_center_correction = 7.0f / 12.0f - 0.5f;
const float pixel_size_x = 2.f / g_renderer->EFBToScaledXf(2.f * xfmem.viewport.wd);
const float pixel_size_y = 2.f / g_renderer->EFBToScaledXf(2.f * xfmem.viewport.ht);
const bool bUseVertexRounding =
g_ActiveConfig.bVertexRounding && g_ActiveConfig.iEFBScale != SCALE_1X;
const float viewport_width = bUseVertexRounding ?
(2.f * xfmem.viewport.wd) :
g_renderer->EFBToScaledXf(2.f * xfmem.viewport.wd);
const float viewport_height = bUseVertexRounding ?
(2.f * xfmem.viewport.ht) :
g_renderer->EFBToScaledXf(2.f * xfmem.viewport.ht);
const float pixel_size_x = 2.f / viewport_width;
const float pixel_size_y = 2.f / viewport_height;
constants.pixelcentercorrection[0] = pixel_center_correction * pixel_size_x;
constants.pixelcentercorrection[1] = pixel_center_correction * pixel_size_y;
@ -391,6 +399,9 @@ void VertexShaderManager::SetConstants()
constants.pixelcentercorrection[2] = 1.0f;
constants.pixelcentercorrection[3] = 0.0f;
constants.viewport[0] = (2.f * xfmem.viewport.wd);
constants.viewport[1] = (2.f * xfmem.viewport.ht);
if (g_renderer->UseVertexDepthRange())
{
// Oversized depth ranges are handled in the vertex shader. We need to reverse

3
Source/Core/VideoCommon/VideoConfig.cpp
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@ -125,6 +125,7 @@ void VideoConfig::Load(const std::string& ini_file)
hacks->Get("EFBToTextureEnable", &bSkipEFBCopyToRam, true);
hacks->Get("EFBScaledCopy", &bCopyEFBScaled, true);
hacks->Get("EFBEmulateFormatChanges", &bEFBEmulateFormatChanges, false);
hacks->Get("VertexRounding", &bVertexRounding, false);
// hacks which are disabled by default
iPhackvalue[0] = 0;
@ -228,6 +229,7 @@ void VideoConfig::GameIniLoad()
CHECK_SETTING("Video_Hacks", "EFBToTextureEnable", bSkipEFBCopyToRam);
CHECK_SETTING("Video_Hacks", "EFBScaledCopy", bCopyEFBScaled);
CHECK_SETTING("Video_Hacks", "EFBEmulateFormatChanges", bEFBEmulateFormatChanges);
CHECK_SETTING("Video_Hacks", "VertexRounding", bVertexRounding);
CHECK_SETTING("Video", "ProjectionHack", iPhackvalue[0]);
CHECK_SETTING("Video", "PH_SZNear", iPhackvalue[1]);
@ -350,6 +352,7 @@ void VideoConfig::Save(const std::string& ini_file)
hacks->Set("EFBToTextureEnable", bSkipEFBCopyToRam);
hacks->Set("EFBScaledCopy", bCopyEFBScaled);
hacks->Set("EFBEmulateFormatChanges", bEFBEmulateFormatChanges);
hacks->Set("VertexRounding", bVertexRounding);
iniFile.Save(ini_file);
}

1
Source/Core/VideoCommon/VideoConfig.h
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@ -127,6 +127,7 @@ struct VideoConfig final
float fAspectRatioHackW, fAspectRatioHackH;
bool bEnablePixelLighting;
bool bFastDepthCalc;
bool bVertexRounding;
int iLog; // CONF_ bits
int iSaveTargetId; // TODO: Should be dropped