1 files changed, 80 insertions, 0 deletions
diff --git a/gfx/webrender_bindings/RenderTextureHostSWGL.h b/gfx/webrender_bindings/RenderTextureHostSWGL.h
new file mode 100644
index 0000000000..b5d1e92056
--- /dev/null
+++ b/gfx/webrender_bindings/RenderTextureHostSWGL.h
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H
+#define MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H
+
+#include "GLTypes.h"
+#include "RenderTextureHost.h"
+
+namespace mozilla {
+namespace wr {
+
+class RenderTextureHostSWGL : public RenderTextureHost {
+ public:
+  RenderTextureHostSWGL() {}
+
+  wr::WrExternalImage LockSWGL(uint8_t aChannelIndex, void* aContext,
+                               RenderCompositor* aCompositor) override;
+
+  void UnlockSWGL() override;
+
+  RenderTextureHostSWGL* AsRenderTextureHostSWGL() override { return this; }
+
+  virtual size_t GetPlaneCount() const = 0;
+
+  virtual gfx::ColorDepth GetColorDepth() const {
+    return gfx::ColorDepth::COLOR_8;
+  }
+
+  struct PlaneInfo {
+    explicit PlaneInfo(GLuint aTexture) : mTexture(aTexture) {}
+
+    GLuint mTexture = 0;
+    void* mData = nullptr;
+    int32_t mStride = 0;
+    gfx::IntSize mSize;
+  };
+
+  virtual bool MapPlane(RenderCompositor* aCompositor, uint8_t aChannelIndex,
+                        PlaneInfo& aPlaneInfo) = 0;
+
+  virtual void UnmapPlanes() = 0;
+
+  // Lock this texture host as an attached external image for a SWGL compositor
+  // surface. See swgl_bindings.rs for a description of the resulting
+  // WrSWGLCompositeSurfaceInfo. This is paired with a call to UnlockSWGL when
+  // composition is done.
+  bool LockSWGLCompositeSurface(void* aContext,
+                                wr::SWGLCompositeSurfaceInfo* aInfo);
+
+  size_t BytesFromPlanes() {
+    NS_ASSERTION(mPlanes.size(), "Can't compute bytes without any planes");
+    size_t bytes = 0;
+    for (auto& plane : mPlanes) {
+      bytes += plane.mStride * plane.mSize.height;
+    }
+    return bytes;
+  }
+
+ protected:
+  bool mLocked = false;
+  void* mContext = nullptr;
+  std::vector<PlaneInfo> mPlanes;
+
+  bool SetContext(void* aContext);
+
+  bool UpdatePlanes(RenderCompositor* aCompositor);
+
+  void CleanupPlanes();
+
+  virtual ~RenderTextureHostSWGL();
+};
+
+}  // namespace wr
+}  // namespace mozilla
+
+#endif  // MOZILLA_GFX_RENDERTEXTUREHOSTSWGL_H