drashna/ryujinx
1
0
Fork 0
Code Activity Actions

Better viewport flipping and depth mode detection method (#1556)

Browse source 
* Use a better viewport flipping approach

* New approach to detect depth mode

* nit: Sort method on the OpenGL backend

* Adjust spacing on comment

* Unswap near and far parameters based on ScaleZ
This commit is contained in:
gdkchan 2020-09-19 19:46:49 -03:00 • committed by GitHub
parent 4b1bed1b05
commit 1eea35554c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
6 changed files with 101 additions and 136 deletions
Download patch file Download diff file Expand all files Collapse all files

111
Ryujinx.Graphics.Gpu/Engine/Methods.cs
View file

@ -488,25 +488,12 @@ namespace Ryujinx.Graphics.Gpu.Engine
/// <param name="state">Current GPU state</param>
private void UpdateViewportTransform(GpuState state)
{
DepthMode depthMode = state.Get<DepthMode>(MethodOffset.DepthMode);
var yControl = state.Get<YControl> (MethodOffset.YControl);
var face = state.Get<FaceState>(MethodOffset.FaceState);
_context.Renderer.Pipeline.SetDepthMode(depthMode);
UpdateFrontFace(yControl, face.FrontFace);
YControl yControl = state.Get<YControl>(MethodOffset.YControl);
bool flipY = yControl.HasFlag(YControl.NegateY);
Origin origin = yControl.HasFlag(YControl.TriangleRastFlip) ? Origin.LowerLeft : Origin.UpperLeft;
_context.Renderer.Pipeline.SetOrigin(origin);
// The triangle rast flip flag only affects rasterization, the viewport is not flipped.
// Setting the origin mode to upper left on the host, however, not only affects rasterization,
// but also flips the viewport.
// We negate the effects of flipping the viewport by flipping it again using the viewport swizzle.
if (origin == Origin.UpperLeft)
{
flipY = !flipY;
}
bool flipY = yControl.HasFlag(YControl.NegateY);
Span<Viewport> viewports = stackalloc Viewport[Constants.TotalViewports];
@ -515,11 +502,42 @@ namespace Ryujinx.Graphics.Gpu.Engine
var transform = state.Get<ViewportTransform>(MethodOffset.ViewportTransform, index);
var extents = state.Get<ViewportExtents> (MethodOffset.ViewportExtents, index);
float x = transform.TranslateX - MathF.Abs(transform.ScaleX);
float y = transform.TranslateY - MathF.Abs(transform.ScaleY);
float scaleX = MathF.Abs(transform.ScaleX);
float scaleY = transform.ScaleY;
float width = MathF.Abs(transform.ScaleX) * 2;
float height = MathF.Abs(transform.ScaleY) * 2;
if (flipY)
{
scaleY = -scaleY;
}
if (!_context.Capabilities.SupportsViewportSwizzle && transform.UnpackSwizzleY() == ViewportSwizzle.NegativeY)
{
scaleY = -scaleY;
}
if (index == 0)
{
// Try to guess the depth mode being used on the high level API
// based on current transform.
// It is setup like so by said APIs:
// If depth mode is ZeroToOne:
// TranslateZ = Near
// ScaleZ = Far - Near
// If depth mode is MinusOneToOne:
// TranslateZ = (Near + Far) / 2
// ScaleZ = (Far - Near) / 2
// DepthNear/Far are sorted such as that Near is always less than Far.
DepthMode depthMode = extents.DepthNear != transform.TranslateZ &&
extents.DepthFar != transform.TranslateZ ? DepthMode.MinusOneToOne : DepthMode.ZeroToOne;
_context.Renderer.Pipeline.SetDepthMode(depthMode);
}
float x = transform.TranslateX - scaleX;
float y = transform.TranslateY - scaleY;
float width = scaleX * 2;
float height = scaleY * 2;
float scale = TextureManager.RenderTargetScale;
if (scale != 1f)
@ -537,34 +555,17 @@ namespace Ryujinx.Graphics.Gpu.Engine
ViewportSwizzle swizzleZ = transform.UnpackSwizzleZ();
ViewportSwizzle swizzleW = transform.UnpackSwizzleW();
if (transform.ScaleX < 0)
{
swizzleX ^= ViewportSwizzle.NegativeFlag;
}
if (flipY)
{
swizzleY ^= ViewportSwizzle.NegativeFlag;
}
if (transform.ScaleY < 0)
{
swizzleY ^= ViewportSwizzle.NegativeFlag;
}
float depthNear = extents.DepthNear;
float depthFar = extents.DepthFar;
if (transform.ScaleZ < 0)
{
swizzleZ ^= ViewportSwizzle.NegativeFlag;
float temp = depthNear;
depthNear = depthFar;
depthFar = temp;
}
viewports[index] = new Viewport(
region,
swizzleX,
swizzleY,
swizzleZ,
swizzleW,
extents.DepthNear,
extents.DepthFar);
viewports[index] = new Viewport(region, swizzleX, swizzleY, swizzleZ, swizzleW, depthNear, depthFar);
}
_context.Renderer.Pipeline.SetViewports(0, viewports);
@ -832,11 +833,29 @@ namespace Ryujinx.Graphics.Gpu.Engine
/// <param name="state">Current GPU state</param>
private void UpdateFaceState(GpuState state)
{
var face = state.Get<FaceState>(MethodOffset.FaceState);
var yControl = state.Get<YControl> (MethodOffset.YControl);
var face = state.Get<FaceState>(MethodOffset.FaceState);
_context.Renderer.Pipeline.SetFaceCulling(face.CullEnable, face.CullFace);
_context.Renderer.Pipeline.SetFrontFace(face.FrontFace);
UpdateFrontFace(yControl, face.FrontFace);
}
/// <summary>
/// Updates the front face based on the current front face and the origin.
/// </summary>
/// <param name="yControl">Y control register value, where the origin is located</param>
/// <param name="frontFace">Front face</param>
private void UpdateFrontFace(YControl yControl, FrontFace frontFace)
{
bool isUpperLeftOrigin = !yControl.HasFlag(YControl.TriangleRastFlip);
if (isUpperLeftOrigin)
{
frontFace = frontFace == FrontFace.CounterClockwise ? FrontFace.Clockwise : FrontFace.CounterClockwise;
}
_context.Renderer.Pipeline.SetFrontFace(frontFace);
}
/// <summary>