1 files changed, 43 insertions, 0 deletions
diff --git a/dom/canvas/WebGLExtensionCompressedTextureBPTC.cpp b/dom/canvas/WebGLExtensionCompressedTextureBPTC.cpp
new file mode 100644
index 0000000000..353526b557
--- /dev/null
+++ b/dom/canvas/WebGLExtensionCompressedTextureBPTC.cpp
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebGLExtensions.h"
+
+#include "GLContext.h"
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "WebGLContext.h"
+#include "WebGLFormats.h"
+
+namespace mozilla {
+
+WebGLExtensionCompressedTextureBPTC::WebGLExtensionCompressedTextureBPTC(
+    WebGLContext* const webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  auto& fua = webgl->mFormatUsage;
+
+  const auto fnAdd = [&](const GLenum sizedFormat,
+                         const webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->isFilterable = true;
+    fua->AllowSizedTexFormat(sizedFormat, usage);
+  };
+
+#define _(X) LOCAL_GL_##X, webgl::EffectiveFormat::X
+
+  fnAdd(_(COMPRESSED_RGBA_BPTC_UNORM));
+  fnAdd(_(COMPRESSED_SRGB_ALPHA_BPTC_UNORM));
+  fnAdd(_(COMPRESSED_RGB_BPTC_SIGNED_FLOAT));
+  fnAdd(_(COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT));
+
+#undef _
+}
+
+bool WebGLExtensionCompressedTextureBPTC::IsSupported(
+    const WebGLContext* const webgl) {
+  return webgl->gl->IsSupported(gl::GLFeature::texture_compression_bptc);
+}
+
+}  // namespace mozilla