Make GM render to render targets that are also textures.

Review URL: https://codereview.chromium.org/13211002

git-svn-id: http://skia.googlecode.com/svn/trunk@8438 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 10 insertions, 1 deletions

diff --git a/include/gpu/SkGpuDevice.h b/include/gpu/SkGpuDevice.h
index a6087c88b8..8aa7d4aac8 100644
--- a/include/gpu/SkGpuDevice.h
+++ b/include/gpu/SkGpuDevice.h
@@ -27,16 +27,24 @@ class GrTextContext;
  */
 class SK_API SkGpuDevice : public SkDevice {
 public:
+
+    /**
+     * Creates an SkGpuDevice from a GrSurface. This will fail if the surface is not a render
+     * target. The caller owns a ref on the returned device.
+     */
+    static SkGpuDevice* Create(GrSurface* surface);
+
     /**
      *  New device that will create an offscreen renderTarget based on the
      *  config, width, height, and sampleCount. The device's storage will not
      *  count against the GrContext's texture cache budget. The device's pixels
-     *  will be uninitialized.
+     *  will be uninitialized. TODO: This can fail, replace with a factory function.
      */
     SkGpuDevice(GrContext*, SkBitmap::Config, int width, int height, int sampleCount = 0);
 
     /**
      *  New device that will render to the specified renderTarget.
+     *  DEPRECATED: Use Create(surface)
      */
     SkGpuDevice(GrContext*, GrRenderTarget*);
 
@@ -44,6 +52,7 @@ public:
      *  New device that will render to the texture (as a rendertarget).
      *  The GrTexture's asRenderTarget() must be non-NULL or device will not
      *  function.
+     *  DEPRECATED: Use Create(surface)
      */
     SkGpuDevice(GrContext*, GrTexture*);