Clean up multipass rendering logic

garbear · May 2, 2024 · d76db50 · d76db50
1 parent 0b43738
commit d76db50
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Showing 2 changed files with 43 additions and 97 deletions.
diff --git a/xbmc/cores/RetroPlayer/shaders/gl/ShaderPresetGL.cpp b/xbmc/cores/RetroPlayer/shaders/gl/ShaderPresetGL.cpp
@@ -80,7 +80,7 @@ ShaderParameterMap CShaderPresetGL::GetShaderParameters(
   return matchParams;
 }
 
-bool CShaderPresetGL::RenderUpdate(const CPoint* dest,
+bool CShaderPresetGL::RenderUpdate(const CPoint dest[],
                                    IShaderTexture* source,
                                    IShaderTexture* target)
 {
@@ -97,64 +97,45 @@ bool CShaderPresetGL::RenderUpdate(const CPoint* dest,
 
   PrepareParameters(target, dest);
 
-  IShader* firstShader = m_pShaders.front().get();
-  IShader* lastShader = m_pShaders.back().get();
-
-  const unsigned passesNum = static_cast<unsigned int>(m_pShaders.size());
-
-  if (passesNum == 1)
-    firstShader->Render(source, target);
-  else if (passesNum == 2)
+  // Apply all passes except the last one (which needs to be applied to the backbuffer)
+  for (unsigned int shaderIdx = 0; shaderIdx < static_cast<unsigned int>(m_pShaders.size()) - 1;
+        ++shaderIdx)
   {
-    // Apply first pass
-    CShaderTextureGL* firstShaderTexture = m_pShaderTextures.front().get();
-    firstShaderTexture->BindFBO();
-    RenderShader(firstShader, source, firstShaderTexture);
-    firstShaderTexture->UnbindFBO();
-
-    // Apply last pass
-    CRect newViewPort(0.f, 0.f, target->GetWidth(), target->GetHeight());
-    m_context.SetViewPort(newViewPort);
-    m_context.SetScissors(newViewPort);
-    lastShader->Render(firstShaderTexture, target);
+    IShader* shader = m_pShaders[shaderIdx].get();
+    IShaderTexture* texture = m_pShaderTextures[shaderIdx].get();
+    RenderShader(shader, source, texture); // The target is used for setting the viewport and binding the FBO
+    source = texture;
   }
-  else
-  {
-    // Apply first pass
-    CShaderTextureGL* firstShaderTexture = m_pShaderTextures.front().get();
-    firstShaderTexture->BindFBO();
-    RenderShader(firstShader, source, firstShaderTexture);
-    firstShaderTexture->UnbindFBO();
-
-    // Apply all passes except the first and last one (which needs to be applied to the backbuffer)
-    for (unsigned int shaderIdx = 1; shaderIdx < static_cast<unsigned int>(m_pShaders.size()) - 1;
-         ++shaderIdx)
-    {
-      IShader* shader = m_pShaders[shaderIdx].get();
-      CShaderTextureGL* prevTexture = m_pShaderTextures[shaderIdx - 1].get();
-      CShaderTextureGL* texture = m_pShaderTextures[shaderIdx].get();
-      texture->BindFBO();
-      RenderShader(shader, prevTexture,
-                   texture); // The target on each call is only used for setting the viewport
-      texture->UnbindFBO();
-    }
 
-    // Apply last pass
-    CShaderTextureGL* secToLastTexture = m_pShaderTextures[m_pShaderTextures.size() - 2].get();
-    CRect newViewPort(0.f, 0.f, target->GetWidth(), target->GetHeight());
-    m_context.SetViewPort(newViewPort);
-    m_context.SetScissors(newViewPort);
-    lastShader->Render(secToLastTexture, target);
-  }
+  // Restore our viewport
+  m_context.SetViewPort(viewPort);
 
-  m_frameCount += static_cast<float>(m_speed);
+  // Apply the last pass and write to target (backbuffer) instead of the last texture
+  IShader* lastShader = m_pShaders.back().get();
+  lastShader->Render(source, target);
 
-  // Restore our view port.
-  m_context.SetViewPort(viewPort);
+  m_frameCount += static_cast<float>(m_speed);
 
   return true;
 }
 
+void CShaderPresetGL::RenderShader(IShader* shader,
+                                   IShaderTexture* source,
+                                   IShaderTexture* target) const
+{
+  if (static_cast<CShaderTextureGL*>(target)->BindFBO())
+  {
+    CRect newViewPort(0.f, 0.f, target->GetWidth(), target->GetHeight());
+    glViewport((GLsizei) newViewPort.x1, (GLsizei) newViewPort.y1,
+               (GLsizei) newViewPort.x2, (GLsizei) newViewPort.y2);
+    glScissor((GLsizei) newViewPort.x1, (GLsizei) newViewPort.y1,
+              (GLsizei) newViewPort.x2, (GLsizei) newViewPort.y2);
+
+    shader->Render(source, target);
+    static_cast<CShaderTextureGL*>(target)->UnbindFBO();
+  }
+}
+
 bool CShaderPresetGL::Update()
 {
   auto updateFailed = [this](const std::string& msg)
@@ -461,16 +442,6 @@ void CShaderPresetGL::PrepareParameters(const IShaderTexture* texture, const CPo
   m_pShaders.back()->PrepareParameters(m_dest, true, static_cast<uint64_t>(m_frameCount));
 }
 
-void CShaderPresetGL::RenderShader(IShader* shader,
-                                   IShaderTexture* source,
-                                   IShaderTexture* target) const
-{
-  glViewport(0, 0, (GLsizei) target->GetWidth(), (GLsizei) target->GetHeight());
-  glScissor(0, 0, (GLsizei) target->GetWidth(), (GLsizei) target->GetHeight());
-
-  shader->Render(source, target);
-}
-
 bool CShaderPresetGL::ReadPresetFile(const std::string& presetPath)
 {
   return CServiceBroker::GetGameServices().VideoShaders().LoadPreset(presetPath, *this);

diff --git a/xbmc/cores/RetroPlayer/shaders/windows/ShaderPresetDX.cpp b/xbmc/cores/RetroPlayer/shaders/windows/ShaderPresetDX.cpp
@@ -100,50 +100,25 @@ bool CShaderPresetDX::RenderUpdate(const CPoint dest[],
 
   PrepareParameters(target, dest);
 
-  // At this point, the input video has been rendered to the first texture ("source", not
-  // m_pShaderTextures[0])
-
-  IShader* firstShader = m_pShaders.front().get();
-  CShaderTextureCD3D* firstShaderTexture = m_pShaderTextures.front().get();
-  IShader* lastShader = m_pShaders.back().get();
-
-  const unsigned passesNum = static_cast<unsigned int>(m_pShaders.size());
-
-  if (passesNum == 1)
-    firstShader->Render(source, target);
-  else if (passesNum == 2)
+  // Apply all passes except the last one (which needs to be applied to the backbuffer)
+  for (unsigned int shaderIdx = 0; shaderIdx < static_cast<unsigned int>(m_pShaders.size()) - 1;
+        ++shaderIdx)
   {
-    // Apply first pass
-    RenderShader(firstShader, source, firstShaderTexture);
-
-    // Apply last pass
-    RenderShader(lastShader, firstShaderTexture, target);
+    IShader* shader = m_pShaders[shaderIdx].get();
+    IShaderTexture* texture = m_pShaderTextures[shaderIdx].get();
+    RenderShader(shader, source, texture);
+    source = texture;
   }
-  else
-  {
-    // Apply first pass
-    RenderShader(firstShader, source, firstShaderTexture);
 
-    // Apply all passes except the first and last one (which needs to be applied to the backbuffer)
-    for (unsigned int shaderIdx = 1; shaderIdx < static_cast<unsigned int>(m_pShaders.size()) - 1;
-         ++shaderIdx)
-    {
-      IShader* shader = m_pShaders[shaderIdx].get();
-      CShaderTextureCD3D* prevTexture = m_pShaderTextures[shaderIdx - 1].get();
-      CShaderTextureCD3D* texture = m_pShaderTextures[shaderIdx].get();
-      RenderShader(shader, prevTexture, texture);
-    }
+  // Restore our viewport
+  m_context.SetViewPort(viewPort);
 
-    // Apply last pass and write to target (backbuffer) instead of the last texture
-    CShaderTextureCD3D* secToLastTexture = m_pShaderTextures[m_pShaderTextures.size() - 2].get();
-    RenderShader(lastShader, secToLastTexture, target);
-  }
+  // Apply the last pass and write to target (backbuffer) instead of the last texture
+  IShader* lastShader = m_pShaders.back().get();
+  lastShader->Render(source, target);
 
   m_frameCount += static_cast<float>(m_speed);
 
-  // Restore our view port.
-  m_context.SetViewPort(viewPort);
-
   return true;
 }