1 files changed, 51 insertions, 0 deletions
diff --git a/dom/canvas/WebGLExtensionEXTColorBufferFloat.cpp b/dom/canvas/WebGLExtensionEXTColorBufferFloat.cpp
new file mode 100644
index 0000000000..d2bfd74434
--- /dev/null
+++ b/dom/canvas/WebGLExtensionEXTColorBufferFloat.cpp
@@ -0,0 +1,51 @@
+/* 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/WebGL2RenderingContextBinding.h"
+#include "WebGLContext.h"
+#include "WebGLFormats.h"
+
+namespace mozilla {
+
+WebGLExtensionEXTColorBufferFloat::WebGLExtensionEXTColorBufferFloat(
+    WebGLContext* webgl)
+    : WebGLExtensionBase(webgl) {
+  MOZ_ASSERT(IsSupported(webgl), "Don't construct extension if unsupported.");
+
+  auto& fua = webgl->mFormatUsage;
+
+  auto fnUpdateUsage = [&fua](GLenum sizedFormat,
+                              webgl::EffectiveFormat effFormat) {
+    auto usage = fua->EditUsage(effFormat);
+    usage->SetRenderable();
+    fua->AllowRBFormat(sizedFormat, usage);
+  };
+
+#define FOO(x) fnUpdateUsage(LOCAL_GL_##x, webgl::EffectiveFormat::x)
+
+  FOO(R16F);
+  FOO(RG16F);
+  FOO(RGBA16F);
+
+  FOO(R32F);
+  FOO(RG32F);
+  FOO(RGBA32F);
+
+  FOO(R11F_G11F_B10F);
+
+#undef FOO
+}
+
+/*static*/
+bool WebGLExtensionEXTColorBufferFloat::IsSupported(const WebGLContext* webgl) {
+  if (!webgl->IsWebGL2()) return false;
+
+  const gl::GLContext* gl = webgl->GL();
+  return gl->IsSupported(gl::GLFeature::EXT_color_buffer_float);
+}
+
+}  // namespace mozilla