From 81793410a80b1bb147e765caccdd7fb36e34edf8 Mon Sep 17 00:00:00 2001
From: joshualitt <joshualitt@chromium.org>
Date: Wed, 8 Jul 2015 12:54:04 -0700
Subject: add ability to get FBO ID to Surface

BUG=skia:

Review URL: https://codereview.chromium.org/1220733007
---
 include/core/SkSurface.h     | 30 +++++++++++++++++++++++++-----
 include/gpu/GrRenderTarget.h |  6 ++++++
 2 files changed, 31 insertions(+), 5 deletions(-)

(limited to 'include')

diff --git a/include/core/SkSurface.h b/include/core/SkSurface.h
index 5860cf2279..57527ed33a 100644
--- a/include/core/SkSurface.h
+++ b/include/core/SkSurface.h
@@ -159,11 +159,23 @@ public:
      */
     void notifyContentWillChange(ContentChangeMode mode);
 
-    enum TextureHandleAccess {
-        kFlushRead_TextureHandleAccess,     //!< caller may read from the texture
-        kFlushWrite_TextureHandleAccess,    //!< caller may write to the texture
-        kDiscardWrite_TextureHandleAccess,  //!< caller must over-write the entire texture
+    enum BackendHandleAccess {
+        kFlushRead_BackendHandleAccess,     //!< caller may read from the backend object
+        kFlushWrite_BackendHandleAccess,    //!< caller may write to the backend object
+        kDiscardWrite_BackendHandleAccess,  //!< caller must over-write the entire backend object
     };
+
+    /*
+     * These are legacy aliases which will be removed soon
+     */
+    static const BackendHandleAccess kFlushRead_TextureHandleAccess =
+            kFlushRead_BackendHandleAccess;
+    static const BackendHandleAccess kFlushWrite_TextureHandleAccess =
+            kFlushWrite_BackendHandleAccess;
+    static const BackendHandleAccess kDiscardWrite_TextureHandleAccess =
+            kDiscardWrite_BackendHandleAccess;
+
+
     /**
      *  Retrieves the backend API handle of the texture used by this surface, or 0 if the surface
      *  is not backed by a GPU texture.
@@ -171,7 +183,15 @@ public:
      *  The returned texture-handle is only valid until the next draw-call into the surface,
      *  or the surface is deleted.
      */
-    GrBackendObject getTextureHandle(TextureHandleAccess);
+    GrBackendObject getTextureHandle(BackendHandleAccess);
+
+    /**
+     *  Retrieves the backend API handle of the RenderTarget backing this surface.  Callers must
+     *  ensure this function returns 'true' or else the GrBackendObject will be invalid
+     *
+     *  In OpenGL this will return the FramebufferObject ID.
+     */
+    bool getRenderTargetHandle(GrBackendObject*, BackendHandleAccess);
 
     /**
      *  Return a canvas that will draw into this surface. This will always
diff --git a/include/gpu/GrRenderTarget.h b/include/gpu/GrRenderTarget.h
index 67dcd4f4c2..8983d53a25 100644
--- a/include/gpu/GrRenderTarget.h
+++ b/include/gpu/GrRenderTarget.h
@@ -138,6 +138,12 @@ public:
     };
     virtual ResolveType getResolveType() const = 0;
 
+    /**
+     *  Return the native ID or handle to the rendertarget, depending on the
+     *  platform. e.g. on OpenGL, return the FBO ID.
+     */
+    virtual GrBackendObject getRenderTargetHandle() const = 0;
+
     // Provides access to functions that aren't part of the public API.
     GrRenderTargetPriv renderTargetPriv();
     const GrRenderTargetPriv renderTargetPriv() const;
-- 
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