VideoBackends: add support to allow rendering to multiple output textures

1 files changed, 27 insertions, 2 deletions

diff --git a/Source/Core/VideoCommon/AbstractFramebuffer.cpp b/Source/Core/VideoCommon/AbstractFramebuffer.cpp
index 982357e691..beb6c6752b 100644
--- a/Source/Core/VideoCommon/AbstractFramebuffer.cpp
+++ b/Source/Core/VideoCommon/AbstractFramebuffer.cpp
@@ -6,10 +6,12 @@
 
 AbstractFramebuffer::AbstractFramebuffer(AbstractTexture* color_attachment,
                                          AbstractTexture* depth_attachment,
+                                         std::vector<AbstractTexture*> additional_color_attachments,
                                          AbstractTextureFormat color_format,
                                          AbstractTextureFormat depth_format, u32 width, u32 height,
                                          u32 layers, u32 samples)
     : m_color_attachment(color_attachment), m_depth_attachment(depth_attachment),
+      m_additional_color_attachments(std::move(additional_color_attachments)),
       m_color_format(color_format), m_depth_format(depth_format), m_width(width), m_height(height),
       m_layers(layers), m_samples(samples)
 {
@@ -17,13 +19,18 @@ AbstractFramebuffer::AbstractFramebuffer(AbstractTexture* color_attachment,
 
 AbstractFramebuffer::~AbstractFramebuffer() = default;
 
-bool AbstractFramebuffer::ValidateConfig(const AbstractTexture* color_attachment,
-                                         const AbstractTexture* depth_attachment)
+bool AbstractFramebuffer::ValidateConfig(
+    const AbstractTexture* color_attachment, const AbstractTexture* depth_attachment,
+    const std::vector<AbstractTexture*>& additional_color_attachments)
 {
   // Must have at least a color or depth attachment.
   if (!color_attachment && !depth_attachment)
     return false;
 
+  // Must have a color attachment if additional color attachments are defined
+  if (!color_attachment && !additional_color_attachments.empty())
+    return false;
+
   // Currently we only expose a single mip level for render target textures.
   // MSAA textures are not supported with mip levels on most backends, and it simplifies our
   // handling of framebuffers.
@@ -36,6 +43,14 @@ bool AbstractFramebuffer::ValidateConfig(const AbstractTexture* color_attachment
     return false;
   }
 
+  for (auto* attachment : additional_color_attachments)
+  {
+    if (!CheckAttachment(attachment))
+    {
+      return false;
+    }
+  }
+
   // If both color and depth are present, their attributes must match.
   if (color_attachment && depth_attachment)
   {
@@ -48,6 +63,16 @@ bool AbstractFramebuffer::ValidateConfig(const AbstractTexture* color_attachment
     }
   }
 
+  for (auto* attachment : additional_color_attachments)
+  {
+    if (color_attachment->GetConfig().width != attachment->GetConfig().width ||
+        color_attachment->GetConfig().height != attachment->GetConfig().height ||
+        color_attachment->GetConfig().samples != attachment->GetConfig().samples)
+    {
+      return false;
+    }
+  }
+
   return true;
 }