[Fix] (MG_Backend/DirectVulkan): clear every layer of layered framebuffers in vkCmdClearAttachments paths (rename the never-read RenderPassEntry::subpass to layers)

MobileGL/MG_Backend/DirectVulkan/Renderer/VkRenderPassManager.cpp

@@ -1015,7 +1015,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             hasDepthStencilAttachment,
             renderPassSampleCount,
             extent,
-            static_cast<Int>(framebufferLayers) };
+            framebufferLayers };
         MGLOG_D("VkRenderPassManager::GetOrCreateRenderPass: hash=0x%llx compatibilityHash=0x%llx attachmentCount=%u colorAttachmentCount=%u samples=%d extent=%dx%d",
                 static_cast<unsigned long long>(hash),
                 static_cast<unsigned long long>(compatibilityHash),

MobileGL/MG_Backend/DirectVulkan/Renderer/VkRenderPassManager.h

@@ -68,7 +68,8 @@ namespace MobileGL::MG_Backend::DirectVulkan {
         Bool hasDepthStencilAttachment = false;
         VkSampleCountFlagBits sampleCount = VK_SAMPLE_COUNT_1_BIT;
         IntVec2 extent = {0, 0};
-        Uint32 subpass = 0;
+        // VkFramebufferCreateInfo::layers of the entry's framebuffer (>1 for layered GL attachments).
+        Uint32 layers = 1;
 
         RenderPassEntry() = default;
         RenderPassEntry(const RenderPassEntry&) = delete;
@@ -84,7 +85,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             std::swap(hasDepthStencilAttachment, that.hasDepthStencilAttachment);
             std::swap(sampleCount, that.sampleCount);
             std::swap(extent, that.extent);
-            std::swap(subpass, that.subpass);
+            std::swap(layers, that.layers);
         }
         RenderPassEntry(
             Uint64 hash,
@@ -97,7 +98,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             Uint32 colorAttachmentCount,
             Bool hasDepthStencilAttachment,
             VkSampleCountFlagBits sampleCount,
-            IntVec2 extent, int subpass):
+            IntVec2 extent, Uint32 layers):
             hash(hash),
             renderPass(renderpass),
             framebuffer(framebuffer),
@@ -109,7 +110,7 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             hasDepthStencilAttachment(hasDepthStencilAttachment),
             sampleCount(sampleCount),
             extent(extent),
-            subpass(subpass)
+            layers(layers)
         {}
 
         ~RenderPassEntry() {

MobileGL/MG_Backend/DirectVulkan/Renderer/VulkanRenderer.cpp

@@ -3646,7 +3646,8 @@ void main() {
                                                     m_swapchainObject.GetPreTransform())
                 : MakeClampedScissorRect(MG_State::pGLContext->GetScissorBox(), renderPassEntry->extent);
             clearRect.baseArrayLayer = 0;
-            clearRect.layerCount = 1;
+            // GL 3.3 §4.4.7: clearing a layered framebuffer clears every layer.
+            clearRect.layerCount = renderPassEntry->layers;
             if (clearRect.rect.extent.width == 0 || clearRect.rect.extent.height == 0) {
                 return;
             }
@@ -6885,7 +6886,8 @@ void main() {
                 static_cast<Uint32>(activeRenderPass->extent.y())
         };
         clearRect.baseArrayLayer = 0;
-        clearRect.layerCount = 1;
+        // Compatible entries share the framebuffer layer count; layered attachments clear every layer.
+        clearRect.layerCount = compatibleRenderPassEntry.layers;
 
         for (const auto& pending : compatibleRenderPassEntry.pendingClearAttachments) {
             if (!pending.hasInlinePayload && pending.key.texture == nullptr) {