BPFunctions: Move GX viewport conversion to VideoCommon

Source/Core/VideoBackends/D3D/Render.cpp

@@ -445,59 +445,17 @@ void Renderer::PokeEFB(EFBAccessType type, const EfbPokeData* points, size_t num
   RestoreAPIState();
 }
 
-void Renderer::SetViewport()
+void Renderer::SetViewport(float x, float y, float width, float height, float near_depth,
+                           float far_depth)
 {
-  // reversed gxsetviewport(xorig, yorig, width, height, nearz, farz)
-  // [0] = width/2
-  // [1] = height/2
-  // [2] = 16777215 * (farz - nearz)
-  // [3] = xorig + width/2 + 342
-  // [4] = yorig + height/2 + 342
-  // [5] = 16777215 * farz
-
-  // D3D crashes for zero viewports
-  if (xfmem.viewport.wd == 0 || xfmem.viewport.ht == 0)
-    return;
-
-  int scissorXOff = bpmem.scissorOffset.x * 2;
-  int scissorYOff = bpmem.scissorOffset.y * 2;
-
-  float X = Renderer::EFBToScaledXf(xfmem.viewport.xOrig - xfmem.viewport.wd - scissorXOff);
-  float Y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissorYOff);
-  float Wd = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
-  float Ht = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
-  float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
-  float max_depth = xfmem.viewport.farZ / 16777216.0f;
-  if (Wd < 0.0f)
-  {
-    X += Wd;
-    Wd = -Wd;
-  }
-  if (Ht < 0.0f)
-  {
-    Y += Ht;
-    Ht = -Ht;
-  }
-
-  // If an inverted or oversized depth range is used, we need to calculate the depth range in the
-  // vertex shader.
-  if (UseVertexDepthRange())
-  {
-    // We need to ensure depth values are clamped the maximum value supported by the console GPU.
-    min_depth = 0.0f;
-    max_depth = GX_MAX_DEPTH;
-  }
-
   // In D3D, the viewport rectangle must fit within the render target.
-  X = (X >= 0.f) ? X : 0.f;
+  D3D11_VIEWPORT vp;
-  Y = (Y >= 0.f) ? Y : 0.f;
+  vp.TopLeftX = MathUtil::Clamp(x, 0.0f, static_cast<float>(m_target_width - 1));
-  Wd = (X + Wd <= GetTargetWidth()) ? Wd : (GetTargetWidth() - X);
+  vp.TopLeftY = MathUtil::Clamp(y, 0.0f, static_cast<float>(m_target_height - 1));
-  Ht = (Y + Ht <= GetTargetHeight()) ? Ht : (GetTargetHeight() - Y);
+  vp.Width = MathUtil::Clamp(width, 1.0f, static_cast<float>(m_target_width) - vp.TopLeftX);
-
+  vp.Height = MathUtil::Clamp(height, 1.0f, static_cast<float>(m_target_height) - vp.TopLeftY);
-  // We use an inverted depth range here to apply the Reverse Z trick.
+  vp.MinDepth = near_depth;
-  // This trick makes sure we match the precision provided by the 1:0
+  vp.MaxDepth = far_depth;
-  // clipping depth range on the hardware.
-  D3D11_VIEWPORT vp = CD3D11_VIEWPORT(X, Y, Wd, Ht, 1.0f - max_depth, 1.0f - min_depth);
   D3D::context->RSSetViewports(1, &vp);
 }
 
@@ -673,7 +631,6 @@ void Renderer::SwapImpl(AbstractTexture* texture, const EFBRectangle& xfb_region
   // begin next frame
   RestoreAPIState();
   FramebufferManager::BindEFBRenderTarget();
-  SetViewport();
 }
 
 // ALWAYS call RestoreAPIState for each ResetAPIState call you're doing
@@ -690,7 +647,7 @@ void Renderer::RestoreAPIState()
   D3D::stateman->PopBlendState();
   D3D::stateman->PopDepthState();
   D3D::stateman->PopRasterizerState();
-  SetViewport();
+  BPFunctions::SetViewport();
   BPFunctions::SetScissor();
 }
 

Source/Core/VideoBackends/D3D/Render.h

@@ -34,7 +34,8 @@ public:
   void SetSamplerState(u32 index, const SamplerState& state) override;
   void UnbindTexture(const AbstractTexture* texture) override;
   void SetInterlacingMode() override;
-  void SetViewport() override;
+  void SetViewport(float x, float y, float width, float height, float near_depth,
+                   float far_depth) override;
   void SetFullscreen(bool enable_fullscreen) override;
   bool IsFullscreen() const override;
 

Source/Core/VideoBackends/OGL/Render.cpp

@@ -1136,75 +1136,23 @@ void Renderer::BBoxWrite(int index, u16 _value)
   BoundingBox::Set(index, value);
 }
 
-void Renderer::SetViewport()
+void Renderer::SetViewport(float x, float y, float width, float height, float near_depth,
+                           float far_depth)
 {
-  // reversed gxsetviewport(xorig, yorig, width, height, nearz, farz)
+  // The x/y parameters here assume a upper-left origin. glViewport takes an offset from the
-  // [0] = width/2
+  // lower-left of the framebuffer, so we must set y to the distance from the lower-left.
-  // [1] = height/2
+  y = static_cast<float>(m_target_height) - y - height;
-  // [2] = 16777215 * (farz - nearz)
-  // [3] = xorig + width/2 + 342
-  // [4] = yorig + height/2 + 342
-  // [5] = 16777215 * farz
-
-  int scissorXOff = bpmem.scissorOffset.x * 2;
-  int scissorYOff = bpmem.scissorOffset.y * 2;
-
-  // TODO: ceil, floor or just cast to int?
-  float X = EFBToScaledXf(xfmem.viewport.xOrig - xfmem.viewport.wd - (float)scissorXOff);
-  float Y = EFBToScaledYf((float)EFB_HEIGHT - xfmem.viewport.yOrig + xfmem.viewport.ht +
-                          (float)scissorYOff);
-  float Width = EFBToScaledXf(2.0f * xfmem.viewport.wd);
-  float Height = EFBToScaledYf(-2.0f * xfmem.viewport.ht);
-  float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
-  float max_depth = xfmem.viewport.farZ / 16777216.0f;
-  if (Width < 0)
-  {
-    X += Width;
-    Width *= -1;
-  }
-  if (Height < 0)
-  {
-    Y += Height;
-    Height *= -1;
-  }
-
-  // Update the view port
   if (g_ogl_config.bSupportViewportFloat)
   {
-    glViewportIndexedf(0, X, Y, Width, Height);
+    glViewportIndexedf(0, x, y, width, height);
   }
   else
   {
-    auto iceilf = [](float f) { return static_cast<GLint>(ceilf(f)); };
+    auto iceilf = [](float f) { return static_cast<GLint>(std::ceil(f)); };
-    glViewport(iceilf(X), iceilf(Y), iceilf(Width), iceilf(Height));
+    glViewport(iceilf(x), iceilf(y), iceilf(width), iceilf(height));
   }
 
-  if (!g_ActiveConfig.backend_info.bSupportsDepthClamp)
+  glDepthRangef(near_depth, far_depth);
-  {
-    // There's no way to support oversized depth ranges in this situation. Let's just clamp the
-    // range to the maximum value supported by the console GPU and hope for the best.
-    min_depth = MathUtil::Clamp(min_depth, 0.0f, GX_MAX_DEPTH);
-    max_depth = MathUtil::Clamp(max_depth, 0.0f, GX_MAX_DEPTH);
-  }
-
-  if (UseVertexDepthRange())
-  {
-    // We need to ensure depth values are clamped the maximum value supported by the console GPU.
-    // Taking into account whether the depth range is inverted or not.
-    if (xfmem.viewport.zRange < 0.0f)
-    {
-      min_depth = GX_MAX_DEPTH;
-      max_depth = 0.0f;
-    }
-    else
-    {
-      min_depth = 0.0f;
-      max_depth = GX_MAX_DEPTH;
-    }
-  }
-
-  // Set the reversed depth range.
-  glDepthRangef(max_depth, min_depth);
 }
 
 void Renderer::ClearScreen(const EFBRectangle& rc, bool colorEnable, bool alphaEnable, bool zEnable,
@@ -1563,9 +1511,9 @@ void Renderer::RestoreAPIState()
   }
   BPFunctions::SetGenerationMode();
   BPFunctions::SetScissor();
+  BPFunctions::SetViewport();
   BPFunctions::SetDepthMode();
   BPFunctions::SetBlendMode();
-  SetViewport();
 
   ProgramShaderCache::BindLastVertexFormat();
   const VertexManager* const vm = static_cast<VertexManager*>(g_vertex_manager.get());

Source/Core/VideoBackends/OGL/Render.h

@@ -98,7 +98,8 @@ public:
   void SetSamplerState(u32 index, const SamplerState& state) override;
   void UnbindTexture(const AbstractTexture* texture) override;
   void SetInterlacingMode() override;
-  void SetViewport() override;
+  void SetViewport(float x, float y, float width, float height, float near_depth,
+                   float far_depth) override;
 
   void RenderText(const std::string& text, int left, int top, u32 color) override;
 

Source/Core/VideoBackends/Vulkan/Renderer.cpp

@@ -810,7 +810,7 @@ void Renderer::RecreateEFBFramebuffer()
   BindEFBToStateTracker();
 
   // Viewport and scissor rect have to be reset since they will be scaled differently.
-  SetViewport();
+  BPFunctions::SetViewport();
   BPFunctions::SetScissor();
 }
 
@@ -910,42 +910,11 @@ void Renderer::SetScissorRect(const EFBRectangle& rc)
   StateTracker::GetInstance()->SetScissor(scissor);
 }
 
-void Renderer::SetViewport()
+void Renderer::SetViewport(float x, float y, float width, float height, float near_depth,
+                           float far_depth)
 {
-  int scissor_x_offset = bpmem.scissorOffset.x * 2;
+  VkViewport viewport = {x,          y,        std::max(width, 1.0f), std::max(height, 1.0f),
-  int scissor_y_offset = bpmem.scissorOffset.y * 2;
+                         near_depth, far_depth};
-
-  float x = Renderer::EFBToScaledXf(xfmem.viewport.xOrig - xfmem.viewport.wd - scissor_x_offset);
-  float y = Renderer::EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissor_y_offset);
-  float width = Renderer::EFBToScaledXf(2.0f * xfmem.viewport.wd);
-  float height = Renderer::EFBToScaledYf(-2.0f * xfmem.viewport.ht);
-  float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
-  float max_depth = xfmem.viewport.farZ / 16777216.0f;
-  if (width < 0.0f)
-  {
-    x += width;
-    width = -width;
-  }
-  if (height < 0.0f)
-  {
-    y += height;
-    height = -height;
-  }
-
-  // If an oversized or inverted depth range is used, we need to calculate the depth range in the
-  // vertex shader.
-  // TODO: Inverted depth ranges are bugged in all drivers, which should be added to DriverDetails.
-  if (UseVertexDepthRange())
-  {
-    // We need to ensure depth values are clamped the maximum value supported by the console GPU.
-    min_depth = 0.0f;
-    max_depth = GX_MAX_DEPTH;
-  }
-
-  // We use an inverted depth range here to apply the Reverse Z trick.
-  // This trick makes sure we match the precision provided by the 1:0
-  // clipping depth range on the hardware.
-  VkViewport viewport = {x, y, width, height, 1.0f - max_depth, 1.0f - min_depth};
   StateTracker::GetInstance()->SetViewport(viewport);
 }
 

Source/Core/VideoBackends/Vulkan/Renderer.h

@@ -67,7 +67,8 @@ public:
   void SetSamplerState(u32 index, const SamplerState& state) override;
   void UnbindTexture(const AbstractTexture* texture) override;
   void SetInterlacingMode() override;
-  void SetViewport() override;
+  void SetViewport(float x, float y, float width, float height, float near_depth,
+                   float far_depth) override;
 
   void ChangeSurface(void* new_surface_handle) override;
 

Source/Core/VideoCommon/BPFunctions.cpp

@@ -12,6 +12,7 @@
 #include "VideoCommon/VertexManagerBase.h"
 #include "VideoCommon/VideoCommon.h"
 #include "VideoCommon/VideoConfig.h"
+#include "VideoCommon/XFMemory.h"
 
 namespace BPFunctions
 {
@@ -68,6 +69,76 @@ void SetScissor()
   g_renderer->SetScissorRect(rc);
 }
 
+void SetViewport()
+{
+  int scissor_x_off = bpmem.scissorOffset.x * 2;
+  int scissor_y_off = bpmem.scissorOffset.y * 2;
+  float x = g_renderer->EFBToScaledXf(xfmem.viewport.xOrig - xfmem.viewport.wd - scissor_x_off);
+  float y = g_renderer->EFBToScaledYf(xfmem.viewport.yOrig + xfmem.viewport.ht - scissor_y_off);
+
+  float width = g_renderer->EFBToScaledXf(2.0f * xfmem.viewport.wd);
+  float height = g_renderer->EFBToScaledYf(-2.0f * xfmem.viewport.ht);
+  float min_depth = (xfmem.viewport.farZ - xfmem.viewport.zRange) / 16777216.0f;
+  float max_depth = xfmem.viewport.farZ / 16777216.0f;
+  if (width < 0.f)
+  {
+    x += width;
+    width *= -1;
+  }
+  if (height < 0.f)
+  {
+    y += height;
+    height *= -1;
+  }
+
+  // The maximum depth that is written to the depth buffer should never exceed this value.
+  // This is necessary because we use a 2^24 divisor for all our depth values to prevent
+  // floating-point round-trip errors. However the console GPU doesn't ever write a value
+  // to the depth buffer that exceeds 2^24 - 1.
+  constexpr float GX_MAX_DEPTH = 16777215.0f / 16777216.0f;
+  if (!g_ActiveConfig.backend_info.bSupportsDepthClamp)
+  {
+    // There's no way to support oversized depth ranges in this situation. Let's just clamp the
+    // range to the maximum value supported by the console GPU and hope for the best.
+    min_depth = MathUtil::Clamp(min_depth, 0.0f, GX_MAX_DEPTH);
+    max_depth = MathUtil::Clamp(max_depth, 0.0f, GX_MAX_DEPTH);
+  }
+
+  if (g_renderer->UseVertexDepthRange())
+  {
+    // We need to ensure depth values are clamped the maximum value supported by the console GPU.
+    // Taking into account whether the depth range is inverted or not.
+    if (xfmem.viewport.zRange < 0.0f && g_ActiveConfig.backend_info.bSupportsReversedDepthRange)
+    {
+      min_depth = GX_MAX_DEPTH;
+      max_depth = 0.0f;
+    }
+    else
+    {
+      min_depth = 0.0f;
+      max_depth = GX_MAX_DEPTH;
+    }
+  }
+
+  float near_depth, far_depth;
+  if (g_ActiveConfig.backend_info.bSupportsReversedDepthRange)
+  {
+    // Set the reversed depth range.
+    near_depth = max_depth;
+    far_depth = min_depth;
+  }
+  else
+  {
+    // We use an inverted depth range here to apply the Reverse Z trick.
+    // This trick makes sure we match the precision provided by the 1:0
+    // clipping depth range on the hardware.
+    near_depth = 1.0f - max_depth;
+    far_depth = 1.0f - min_depth;
+  }
+
+  g_renderer->SetViewport(x, y, width, height, near_depth, far_depth);
+}
+
 void SetDepthMode()
 {
   DepthState state = {};

Source/Core/VideoCommon/BPFunctions.h

@@ -17,6 +17,7 @@ namespace BPFunctions
 void FlushPipeline();
 void SetGenerationMode();
 void SetScissor();
+void SetViewport();
 void SetDepthMode();
 void SetBlendMode();
 void ClearScreen(const EFBRectangle& rc);

Source/Core/VideoCommon/BPStructs.cpp

@@ -130,6 +130,7 @@ static void BPWritten(const BPCmd& bp)
   case BPMEM_SCISSORBR:      // Scissor Rectable Bottom, Right
   case BPMEM_SCISSOROFFSET:  // Scissor Offset
     SetScissor();
+    SetViewport();
     VertexShaderManager::SetViewportChanged();
     GeometryShaderManager::SetViewportChanged();
     return;
@@ -1415,6 +1416,7 @@ void BPReload()
   // note that PixelShaderManager is already covered since it has its own DoState.
   SetGenerationMode();
   SetScissor();
+  SetViewport();
   SetDepthMode();
   SetBlendMode();
   OnPixelFormatChange();

Source/Core/VideoCommon/RenderBase.cpp

@@ -71,12 +71,6 @@ static int OSDTime;
 
 std::unique_ptr<Renderer> g_renderer;
 
-// The maximum depth that is written to the depth buffer should never exceed this value.
-// This is necessary because we use a 2^24 divisor for all our depth values to prevent
-// floating-point round-trip errors. However the console GPU doesn't ever write a value
-// to the depth buffer that exceeds 2^24 - 1.
-const float Renderer::GX_MAX_DEPTH = 16777215.0f / 16777216.0f;
-
 static float AspectToWidescreen(float aspect)
 {
   return aspect * ((16.0f / 9.0f) / (4.0f / 3.0f));

Source/Core/VideoCommon/RenderBase.h

@@ -77,7 +77,10 @@ public:
   virtual void SetSamplerState(u32 index, const SamplerState& state) {}
   virtual void UnbindTexture(const AbstractTexture* texture) {}
   virtual void SetInterlacingMode() {}
-  virtual void SetViewport() {}
+  virtual void SetViewport(float x, float y, float width, float height, float near_depth,
+                           float far_depth)
+  {
+  }
   virtual void SetFullscreen(bool enable_fullscreen) {}
   virtual bool IsFullscreen() const { return false; }
   virtual void ApplyState() {}
@@ -184,8 +187,6 @@ protected:
 
   std::unique_ptr<PostProcessingShaderImplementation> m_post_processor;
 
-  static const float GX_MAX_DEPTH;
-
   void* m_surface_handle = nullptr;
   void* m_new_surface_handle = nullptr;
   Common::Flag m_surface_needs_change;

Source/Core/VideoCommon/VertexShaderManager.cpp

@@ -16,6 +16,7 @@
 #include "Common/MathUtil.h"
 #include "Core/ConfigManager.h"
 #include "Core/Core.h"
+#include "VideoCommon/BPFunctions.h"
 #include "VideoCommon/BPMemory.h"
 #include "VideoCommon/CPMemory.h"
 #include "VideoCommon/RenderBase.h"
@@ -420,8 +421,7 @@ void VertexShaderManager::SetConstants()
     }
 
     dirty = true;
-    // This is so implementation-dependent that we can't have it here.
+    BPFunctions::SetViewport();
-    g_renderer->SetViewport();
 
     // Update projection if the viewport isn't 1:1 useable
     if (!g_ActiveConfig.backend_info.bSupportsOversizedViewports)