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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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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)