Initial work to get ETC1 data up to the GPU

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 11f87e0458d9b0b8b0aa3cd386ee7363d4a6028c..f2d0618d6016b0c35d097b2ceef18f72b466f0e1 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -87,6 +87,23 @@ public:
                              const void* srcData, size_t rowBytes);
 
     /**
+     * Creates a compressed texture object. If desc width or height is not a power of
+     * two but underlying API requires a power of two texture then this function will
+     * return NULL.
+     *
+     * The kRenderTarget_TextureFlag should not be specified
+     *
+     * @param desc        describes the texture to be created.

[robertphillips, 2014/05/27 22:01:50]

Mention its compressedness ?

[krajcevski, 2014/05/27 22:19:29]

Done.

+     * @param srcData     texel data to load texture. The size of the data is expected
+     *                    to be large enough to hold as much data as the format expects
+     *                    with respect to the width and height.

[robertphillips, 2014/05/27 22:01:50]

format ?

[krajcevski, 2014/05/27 22:19:29]

Done.

[krajcevski, 2014/05/27 22:19:29]

Done.

+     *
+     * @return    The texture object if successful, otherwise NULL.
+     */
+    GrTexture* createCompressedTexture(const GrTextureDesc& desc,
+                                       const void* srcData, GrCompressedFormat format);
+
+    /**
      * Implements GrContext::wrapBackendTexture
      */
     GrTexture* wrapBackendTexture(const GrBackendTextureDesc&);
@@ -414,6 +431,9 @@ private:
     virtual GrTexture* onCreateTexture(const GrTextureDesc& desc,
                                        const void* srcData,
                                        size_t rowBytes) = 0;
+    virtual GrTexture* onCreateCompressedTexture(const GrTextureDesc& desc,
+                                                 const void* srcData,
+                                                 GrCompressedFormat format) = 0;
     virtual GrTexture* onWrapBackendTexture(const GrBackendTextureDesc&) = 0;
     virtual GrRenderTarget* onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) = 0;
     virtual GrVertexBuffer* onCreateVertexBuffer(size_t size, bool dynamic) = 0;