Fixed handling of image layers/cubemaps.

Author: robertosfield

include/vsg/core/Data.h

@@ -190,8 +190,11 @@ namespace vsg
         virtual uint32_t height() const = 0;
         virtual uint32_t depth() const = 0;
 
-        /// return the {width, height, depth} pixel extents of an image accounting for blockWidth and any mipmapData assigned to image.
-        std::tuple<uint32_t, uint32_t, uint32_t> pixelExtents() const;
+        /// return the number of faces - uses properties.imageViewType and depth() value.
+        std::pair<uint32_t, uint32_t> faceDepthAndCount() const;
+
+        /// return the {width, height, depth, layers} pixel extents of an image accounting for blockWidth and any mipmapData assigned to image.
+        std::tuple<uint32_t, uint32_t, uint32_t, uint32_t> pixelExtents() const;
 
         bool contiguous() const { return valueSize() == properties.stride; }
 

src/vsg/core/Data.cpp

@@ -16,6 +16,7 @@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLI
 #include <vsg/core/MipmapLayout.h>
 #include <vsg/io/Input.h>
 #include <vsg/io/Output.h>
+#include <vsg/io/Logger.h>
 
 using namespace vsg;
 
@@ -145,10 +146,28 @@ const MipmapLayout* Data::getMipmapLayout() const
     return getObject<MipmapLayout>("mipmapLayout");
 }
 
+std::pair<uint32_t, uint32_t> Data::faceDepthAndCount() const
+{
+    // Use properties.imageViewType to set the face count and face depth https://docs.vulkan.org/refpages/latest/refpages/source/VkImageViewType.html
+    switch(properties.imageViewType)
+    {
+        case(VK_IMAGE_VIEW_TYPE_CUBE):
+        case(VK_IMAGE_VIEW_TYPE_CUBE_ARRAY):
+            return {depth()/6, 6};
+        case(VK_IMAGE_VIEW_TYPE_1D_ARRAY):
+        case(VK_IMAGE_VIEW_TYPE_2D_ARRAY):
+            return {1, depth()};
+        default:
+            return {depth(), 1};
+    }
+}
+
 std::size_t Data::computeValueCountIncludingMipmaps() const
 {
     std::size_t count = 0;
 
+    auto [faceDepth, faceCount] = faceDepthAndCount();
+
     if (auto mipmapLayout = getMipmapLayout())
     {
         for (const auto& mipmap : *mipmapLayout)
@@ -160,12 +179,13 @@ std::size_t Data::computeValueCountIncludingMipmaps() const
 
             count += w * h * d;
         }
+        count *= faceCount;
     }
     else
     {
         std::size_t x = width() * properties.blockWidth;
         std::size_t y = height() * properties.blockHeight;
-        std::size_t z = depth() * properties.blockDepth;
+        std::size_t z = faceDepth * properties.blockDepth;
 
         auto mipLevels = std::max(properties.mipLevels, uint8_t(1));
         for (uint8_t level = 0; level < mipLevels; ++level)
@@ -181,16 +201,20 @@ std::size_t Data::computeValueCountIncludingMipmaps() const
             if (y > 1) y = y / 2;
             if (z > 1) z = z / 2;
         }
+
+        count *= faceCount;
     }
 
     return count;
 }
 
-std::tuple<uint32_t, uint32_t, uint32_t> Data::pixelExtents() const
+std::tuple<uint32_t, uint32_t, uint32_t, uint32_t> Data::pixelExtents() const
 {
+    auto [faceDepth, faceCount] = faceDepthAndCount();
+
     uint32_t w = width() * properties.blockWidth;
     uint32_t h = height() * properties.blockHeight;
-    uint32_t d = depth() * properties.blockDepth;
+    uint32_t d = faceDepth * properties.blockDepth;
 
     if (auto mipmapLayout = getMipmapLayout())
     {
@@ -200,5 +224,5 @@ std::tuple<uint32_t, uint32_t, uint32_t> Data::pixelExtents() const
         d = mipmap.z;
     }
 
-    return {w, h, d};
+    return {w, h, d, faceCount};
 }

src/vsg/state/Image.cpp

@@ -40,57 +40,43 @@ Image::Image(ref_ptr<Data> in_data) :
         auto properties = data->properties;
         auto dimensions = data->dimensions();
 
-        auto [width, height, depth] = data->pixelExtents();
+        std::tie(extent.width, extent.height, extent.depth, arrayLayers) = data->pixelExtents();
 
         switch (properties.imageViewType)
         {
         case (VK_IMAGE_VIEW_TYPE_1D):
             imageType = VK_IMAGE_TYPE_1D;
-            arrayLayers = 1;
             break;
         case (VK_IMAGE_VIEW_TYPE_2D):
             imageType = VK_IMAGE_TYPE_2D;
-            arrayLayers = 1;
             break;
         case (VK_IMAGE_VIEW_TYPE_3D):
             imageType = VK_IMAGE_TYPE_3D;
-            arrayLayers = 1;
             break;
         case (VK_IMAGE_VIEW_TYPE_CUBE):
             imageType = VK_IMAGE_TYPE_2D;
             flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
-            arrayLayers = depth;
-            depth = 1;
             break;
         case (VK_IMAGE_VIEW_TYPE_1D_ARRAY):
             imageType = VK_IMAGE_TYPE_1D;
-            arrayLayers = height * depth;
-            height = 1;
-            depth = 1;
             /* flags = VK_IMAGE_CREATE_1D_ARRAY_COMPATIBLE_BIT; // comment out as Vulkan headers don't yet provide this. */
             break;
         case (VK_IMAGE_VIEW_TYPE_2D_ARRAY):
             // imageType = VK_IMAGE_TYPE_3D;
             // flags = VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT;
             imageType = VK_IMAGE_TYPE_2D;
-            arrayLayers = depth;
-            depth = 1;
             break;
         case (VK_IMAGE_VIEW_TYPE_CUBE_ARRAY):
             imageType = VK_IMAGE_TYPE_2D;
             flags = VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT;
-            arrayLayers = depth;
-            depth = 1;
             break;
         default:
             imageType = dimensions >= 3 ? VK_IMAGE_TYPE_3D : (dimensions == 2 ? VK_IMAGE_TYPE_2D : VK_IMAGE_TYPE_1D);
-            arrayLayers = 1;
             break;
         }
 
         format = properties.format;
         mipLevels = std::max(1u, static_cast<uint32_t>(data->properties.mipLevels));
-        extent = VkExtent3D{width, height, depth};
 
         // vsg::info("Image::Image(", data, ") mpipLevels = ", mipLevels);
 
@@ -212,8 +198,6 @@ VkResult Image::compile(Device* device)
     info.pQueueFamilyIndices = queueFamilyIndices.data();
     info.initialLayout = initialLayout;
 
-    // vsg::info("Image::compile(), data = ",data, ", mipLevels = ", mipLevels, ", arrayLayers = ", arrayLayers, ", extent = {", extent.width, ", ", extent.height, ", ", extent.depth, "}");
-
     vd.device = device;
 
     vd.requiresDataCopy = data.valid();

src/vsg/state/ImageInfo.cpp

@@ -331,7 +331,7 @@ uint32_t vsg::computeNumMipMapLevels(const Data* data, const Sampler* sampler)
     if (sampler)
     {
         // clamp the mipLevels so that it's no larger than what the data dimensions support
-        auto [width, height, depth] = data->pixelExtents();
+        auto [width, height, depth, numLayers] = data->pixelExtents();
         uint32_t maxDimension = std::max({width, height, depth});
         if (sampler->maxLod == VK_LOD_CLAMP_NONE)
         {