VideoBackends: add support for cube maps for OGL, Vulkan, and D3D

7 files changed, 81 insertions, 24 deletions

diff --git a/Source/Core/VideoBackends/D3D/DXTexture.cpp b/Source/Core/VideoBackends/D3D/DXTexture.cpp
index c20a8d9204..7a260eae4a 100644
--- a/Source/Core/VideoBackends/D3D/DXTexture.cpp
+++ b/Source/Core/VideoBackends/D3D/DXTexture.cpp
@@ -46,7 +46,8 @@ std::unique_ptr<DXTexture> DXTexture::Create(const TextureConfig& config, std::s
     bindflags |= D3D11_BIND_UNORDERED_ACCESS;
 
   CD3D11_TEXTURE2D_DESC desc(tex_format, config.width, config.height, config.layers, config.levels,
-                             bindflags, D3D11_USAGE_DEFAULT, 0, config.samples, 0, 0);
+                             bindflags, D3D11_USAGE_DEFAULT, 0, config.samples, 0,
+                             config.IsCubeMap() ? D3D11_RESOURCE_MISC_TEXTURECUBE : 0);
   ComPtr<ID3D11Texture2D> d3d_texture;
   HRESULT hr = D3D::device->CreateTexture2D(&desc, nullptr, d3d_texture.GetAddressOf());
   if (FAILED(hr))
@@ -90,6 +91,7 @@ bool DXTexture::CreateSRV()
 {
   const CD3D11_SHADER_RESOURCE_VIEW_DESC desc(
       m_texture.Get(),
+      m_config.IsCubeMap()      ? D3D11_SRV_DIMENSION_TEXTURECUBE :
       m_config.IsMultisampled() ? D3D11_SRV_DIMENSION_TEXTURE2DMSARRAY :
                                   D3D11_SRV_DIMENSION_TEXTURE2DARRAY,
       D3DCommon::GetSRVFormatForAbstractFormat(m_config.format), 0, m_config.levels, 0,
diff --git a/Source/Core/VideoBackends/D3D12/DX12Context.cpp b/Source/Core/VideoBackends/D3D12/DX12Context.cpp
index bf156b2fdb..dd8630ac3b 100644
--- a/Source/Core/VideoBackends/D3D12/DX12Context.cpp
+++ b/Source/Core/VideoBackends/D3D12/DX12Context.cpp
@@ -88,7 +88,8 @@ std::vector<u32> DXContext::GetAAModes(u32 adapter_index)
 
 bool DXContext::SupportsTextureFormat(DXGI_FORMAT format)
 {
-  constexpr u32 required = D3D12_FORMAT_SUPPORT1_TEXTURE2D | D3D12_FORMAT_SUPPORT1_SHADER_SAMPLE;
+  constexpr u32 required = D3D12_FORMAT_SUPPORT1_TEXTURE2D | D3D12_FORMAT_SUPPORT1_TEXTURECUBE |
+                           D3D12_FORMAT_SUPPORT1_SHADER_SAMPLE;
 
   D3D12_FEATURE_DATA_FORMAT_SUPPORT support = {format};
   return SUCCEEDED(m_device->CheckFeatureSupport(D3D12_FEATURE_FORMAT_SUPPORT, &support,
diff --git a/Source/Core/VideoBackends/D3D12/DX12Texture.cpp b/Source/Core/VideoBackends/D3D12/DX12Texture.cpp
index f20c37354b..a51fe7ff38 100644
--- a/Source/Core/VideoBackends/D3D12/DX12Texture.cpp
+++ b/Source/Core/VideoBackends/D3D12/DX12Texture.cpp
@@ -165,19 +165,30 @@ bool DXTexture::CreateSRVDescriptor()
     return false;
   }
 
-  D3D12_SHADER_RESOURCE_VIEW_DESC desc = {D3DCommon::GetSRVFormatForAbstractFormat(m_config.format),
-                                          m_config.IsMultisampled() ?
-                                              D3D12_SRV_DIMENSION_TEXTURE2DMSARRAY :
-                                              D3D12_SRV_DIMENSION_TEXTURE2DARRAY,
-                                          D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING};
-  if (m_config.IsMultisampled())
+  D3D12_SHADER_RESOURCE_VIEW_DESC desc = {
+      D3DCommon::GetSRVFormatForAbstractFormat(m_config.format),
+      m_config.IsCubeMap()      ? D3D12_SRV_DIMENSION_TEXTURECUBE :
+      m_config.IsMultisampled() ? D3D12_SRV_DIMENSION_TEXTURE2DMSARRAY :
+                                  D3D12_SRV_DIMENSION_TEXTURE2DARRAY,
+      D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING};
+
+  if (m_config.IsCubeMap())
   {
-    desc.Texture2DMSArray.ArraySize = m_config.layers;
+    desc.TextureCube.MostDetailedMip = 0;
+    desc.TextureCube.MipLevels = m_config.levels;
+    desc.TextureCube.ResourceMinLODClamp = 0.0f;
   }
   else
   {
-    desc.Texture2DArray.MipLevels = m_config.levels;
-    desc.Texture2DArray.ArraySize = m_config.layers;
+    if (m_config.IsMultisampled())
+    {
+      desc.Texture2DMSArray.ArraySize = m_config.layers;
+    }
+    else
+    {
+      desc.Texture2DArray.MipLevels = m_config.levels;
+      desc.Texture2DArray.ArraySize = m_config.layers;
+    }
   }
   g_dx_context->GetDevice()->CreateShaderResourceView(m_resource.Get(), &desc,
                                                       m_srv_descriptor.cpu_handle);
diff --git a/Source/Core/VideoBackends/OGL/OGLTexture.cpp b/Source/Core/VideoBackends/OGL/OGLTexture.cpp
index f8894a365b..70c38d14ff 100644
--- a/Source/Core/VideoBackends/OGL/OGLTexture.cpp
+++ b/Source/Core/VideoBackends/OGL/OGLTexture.cpp
@@ -140,7 +140,11 @@ OGLTexture::OGLTexture(const TextureConfig& tex_config, std::string_view name)
   glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, m_config.levels - 1);
 
   GLenum gl_internal_format = GetGLInternalFormatForTextureFormat(m_config.format, true);
-  if (tex_config.IsMultisampled())
+  if (g_ogl_config.bSupportsTextureStorage && m_config.IsCubeMap())
+  {
+    glTexStorage2D(target, m_config.levels, gl_internal_format, m_config.width, m_config.height);
+  }
+  else if (tex_config.IsMultisampled())
   {
     ASSERT(g_ogl_config.bSupportsMSAA);
     if (g_ogl_config.SupportedMultisampleTexStorage != MultisampleTexStorageType::TexStorageNone)
@@ -267,29 +271,62 @@ void OGLTexture::Load(u32 level, u32 width, u32 height, u32 row_length, const u8
   GLenum gl_internal_format = GetGLInternalFormatForTextureFormat(m_config.format, false);
   if (IsCompressedFormat(m_config.format))
   {
-    if (g_ogl_config.bSupportsTextureStorage)
+    if (m_config.IsCubeMap())
     {
-      glCompressedTexSubImage3D(target, level, 0, 0, layer, width, height, 1, gl_internal_format,
-                                static_cast<GLsizei>(buffer_size), buffer);
+      if (g_ogl_config.bSupportsTextureStorage)
+      {
+        glCompressedTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer, level, 0, 0, width,
+                                  height, gl_internal_format, static_cast<GLsizei>(buffer_size),
+                                  buffer);
+      }
+      else
+      {
+        glCompressedTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer, level, gl_internal_format,
+                               width, height, 0, static_cast<GLsizei>(buffer_size), buffer);
+      }
     }
     else
     {
-      glCompressedTexImage3D(target, level, gl_internal_format, width, height, 1, 0,
-                             static_cast<GLsizei>(buffer_size), buffer);
+      if (g_ogl_config.bSupportsTextureStorage)
+      {
+        glCompressedTexSubImage3D(target, level, 0, 0, layer, width, height, 1, gl_internal_format,
+                                  static_cast<GLsizei>(buffer_size), buffer);
+      }
+      else
+      {
+        glCompressedTexImage3D(target, level, gl_internal_format, width, height, 1, 0,
+                               static_cast<GLsizei>(buffer_size), buffer);
+      }
     }
   }
   else
   {
     GLenum gl_format = GetGLFormatForTextureFormat(m_config.format);
     GLenum gl_type = GetGLTypeForTextureFormat(m_config.format);
-    if (g_ogl_config.bSupportsTextureStorage)
+    if (m_config.IsCubeMap())
     {
-      glTexSubImage3D(target, level, 0, 0, layer, width, height, 1, gl_format, gl_type, buffer);
+      if (g_ogl_config.bSupportsTextureStorage)
+      {
+        glTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer, level, 0, 0, width, height,
+                        gl_format, gl_type, buffer);
+      }
+      else
+      {
+        glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + layer, level, gl_internal_format, width,
+                     height, 0, gl_format, gl_type, buffer);
+      }
     }
     else
     {
-      glTexImage3D(target, level, gl_internal_format, width, height, 1, 0, gl_format, gl_type,
-                   buffer);
+      if (g_ogl_config.bSupportsTextureStorage)
+      {
+        glTexSubImage3D(target, level, 0, 0, layer, width, height, 1, gl_format, gl_type, buffer);
+      }
+      else
+      {
+        glTexImage3D(target, level, gl_internal_format, width, height, 1, 0, gl_format, gl_type,
+                     buffer);
+      }
     }
   }
 
diff --git a/Source/Core/VideoBackends/OGL/OGLTexture.h b/Source/Core/VideoBackends/OGL/OGLTexture.h
index 53d9d7f589..91879a6564 100644
--- a/Source/Core/VideoBackends/OGL/OGLTexture.h
+++ b/Source/Core/VideoBackends/OGL/OGLTexture.h
@@ -34,7 +34,9 @@ public:
   GLuint GetGLTextureId() const { return m_texId; }
   GLenum GetGLTarget() const
   {
-    return IsMultisampled() ? GL_TEXTURE_2D_MULTISAMPLE_ARRAY : GL_TEXTURE_2D_ARRAY;
+    return m_config.IsCubeMap() ? GL_TEXTURE_CUBE_MAP :
+           IsMultisampled()     ? GL_TEXTURE_2D_MULTISAMPLE_ARRAY :
+                                  GL_TEXTURE_2D_ARRAY;
   }
   static GLenum GetGLInternalFormatForTextureFormat(AbstractTextureFormat format, bool storage);
   GLenum GetGLFormatForImageTexture() const;
diff --git a/Source/Core/VideoBackends/Vulkan/VKTexture.cpp b/Source/Core/VideoBackends/Vulkan/VKTexture.cpp
index f8923b4edc..e80ce4f2f7 100644
--- a/Source/Core/VideoBackends/Vulkan/VKTexture.cpp
+++ b/Source/Core/VideoBackends/Vulkan/VKTexture.cpp
@@ -70,7 +70,8 @@ std::unique_ptr<VKTexture> VKTexture::Create(const TextureConfig& tex_config, st
 
   VkImageCreateInfo image_info = {VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO,
                                   nullptr,
-                                  0,
+                                  tex_config.IsCubeMap() ? VK_IMAGE_CREATE_CUBE_COMPATIBLE_BIT :
+                                                           static_cast<VkImageCreateFlags>(0),
                                   VK_IMAGE_TYPE_2D,
                                   GetVkFormatForHostTextureFormat(tex_config.format),
                                   {tex_config.width, tex_config.height, 1},
@@ -106,7 +107,8 @@ std::unique_ptr<VKTexture> VKTexture::Create(const TextureConfig& tex_config, st
 
   std::unique_ptr<VKTexture> texture = std::make_unique<VKTexture>(
       tex_config, alloc, image, name, VK_IMAGE_LAYOUT_UNDEFINED, ComputeImageLayout::Undefined);
-  if (!texture->CreateView(VK_IMAGE_VIEW_TYPE_2D_ARRAY))
+  if (!texture->CreateView(tex_config.IsCubeMap() ? VK_IMAGE_VIEW_TYPE_CUBE :
+                                                    VK_IMAGE_VIEW_TYPE_2D_ARRAY))
     return nullptr;
 
   return texture;
diff --git a/Source/Core/VideoCommon/TextureConfig.h b/Source/Core/VideoCommon/TextureConfig.h
index c076ff85c0..75d7387f17 100644
--- a/Source/Core/VideoCommon/TextureConfig.h
+++ b/Source/Core/VideoCommon/TextureConfig.h
@@ -39,6 +39,7 @@ enum AbstractTextureFlag : u32
 {
   AbstractTextureFlag_RenderTarget = (1 << 0),  // Texture is used as a framebuffer.
   AbstractTextureFlag_ComputeImage = (1 << 1),  // Texture is used as a compute image.
+  AbstractTextureFlag_CubeMap = (1 << 2),       // Texture is used as a cube map.
 };
 
 struct TextureConfig
@@ -61,6 +62,7 @@ struct TextureConfig
   bool IsMultisampled() const { return samples > 1; }
   bool IsRenderTarget() const { return (flags & AbstractTextureFlag_RenderTarget) != 0; }
   bool IsComputeImage() const { return (flags & AbstractTextureFlag_ComputeImage) != 0; }
+  bool IsCubeMap() const { return (flags & AbstractTextureFlag_CubeMap) != 0; }
 
   u32 width = 0;
   u32 height = 0;