From c53ee125786d3fcaa3a9ca5a38c20860aec9f0dc Mon Sep 17 00:00:00 2001
From: Phillip Stephens <antidote.crk@gmail.com>
Date: Sun, 6 Feb 2022 05:13:19 -0800
Subject: [PATCH] Add ability to check if DXT1/BC1 is supported, create a fake
 texture for the time being for hardware that doesn't support it

---
 Graphics/src/lib.rs              |  5 +++++
 Runtime/Graphics/CTextureBoo.cpp | 19 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/Graphics/src/lib.rs b/Graphics/src/lib.rs
index dcaa79eb8..3c94bae75 100644
--- a/Graphics/src/lib.rs
+++ b/Graphics/src/lib.rs
@@ -110,6 +110,7 @@ mod ffi {
         fn get_args() -> Vec<String>;
         fn get_window_size() -> WindowSize;
         fn set_window_title(title: &CxxString);
+        fn get_dxt_compression_supported() -> bool;
         fn get_backend() -> Backend;
         fn get_backend_string() -> &'static str;
         fn set_fullscreen(v: bool);
@@ -326,6 +327,10 @@ fn get_backend() -> ffi::Backend {
     }
 }
 
+fn get_dxt_compression_supported() -> bool {
+    return get_app().gpu.adapter.features().contains(wgpu::Features::TEXTURE_COMPRESSION_BC);
+}
+
 fn get_backend_string() -> &'static str {
     match get_app().gpu.backend {
         Backend::Vulkan => "Vulkan",
diff --git a/Runtime/Graphics/CTextureBoo.cpp b/Runtime/Graphics/CTextureBoo.cpp
index 8f8c5a335..3c359b14f 100644
--- a/Runtime/Graphics/CTextureBoo.cpp
+++ b/Runtime/Graphics/CTextureBoo.cpp
@@ -754,7 +754,24 @@ CTexture::CTexture(std::unique_ptr<u8[]>&& in, u32 length, bool otex, const CTex
     BuildRGBA8FromGCN(r, label);
     break;
   case ETexelFormat::CMPR:
-    BuildDXT1FromGCN(r, label);
+    if (aurora::get_dxt_compression_supported()) {
+      BuildDXT1FromGCN(r, label);
+    } else {
+      Log.report(logvisor::Error, FMT_STRING("BC/DXT1 compression is not supported on your GPU, unable to load {}"),
+                 label);
+      x0_fmt = ETexelFormat::RGBA8PC;
+      x8_mips = 1;
+      std::unique_ptr<u8[]> data= std::make_unique<u8[]>(x4_w * x6_h * 4);
+      /* Build a fake texture to use */
+      for (u32 i = 0; i < (x4_w * x6_h) * 4; i += 4) {
+        data[i + 0] = 0xFF;
+        data[i + 1] = 0x00;
+        data[i + 2] = 0xFF;
+        data[i + 3] = 0xFF;
+      }
+      m_tex = aurora::new_static_texture_2d(x4_w, x6_h, x8_mips, aurora::shaders::TextureFormat::RGBA8,
+                                            {reinterpret_cast<const uint8_t*>(data.get()), (x4_w * x6_h * 4ul)}, label);
+    }
     break;
   case ETexelFormat::RGBA8PC:
     BuildRGBA8(owned.get() + 12, length - 12, label);