Revert "Revert "Plumb GrBackendTexture throughout skia.""

This reverts commit 7fa5c31c2c9af834bee66d5fcf476e250076c8d6.

Reason for revert: Relanding this change now that other fixes have landed.

Original change's description:
> Revert "Plumb GrBackendTexture throughout skia."
> 
> This reverts commit 7da62b9059f3c1d31624a0e4da96ee5f908f9c12.
> 
> Reason for revert: fix android roll
> 
> Original change's description:
> > Plumb GrBackendTexture throughout skia.
> > 
> > Bug: skia:
> > Change-Id: I1bae6768ee7229818a83ba608035a1f7867e6875
> > Reviewed-on: https://skia-review.googlesource.com/13645
> > Commit-Queue: Greg Daniel <egdaniel@google.com>
> > Reviewed-by: Robert Phillips <robertphillips@google.com>
> > 
> 
> TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com,brianosman@google.com,reviews@skia.org,stani@google.com
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> 
> Change-Id: I5cb8763cc837c83ebc6d10366fe2dd3efe35fb89
> Reviewed-on: https://skia-review.googlesource.com/13773
> Reviewed-by: Stan Iliev <stani@google.com>
> Commit-Queue: Stan Iliev <stani@google.com>
> 

TBR=egdaniel@google.com,bsalomon@google.com,robertphillips@google.com,reviews@skia.org,brianosman@google.com,stani@google.com
# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I92bc074e4fe37fa5c83186afadc472c03802e8f2
Reviewed-on: https://skia-review.googlesource.com/13975
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>

1 files changed, 20 insertions, 12 deletions

diff --git a/include/gpu/GrBackendSurface.h b/include/gpu/GrBackendSurface.h
index e588b8aa3a..fd99a4312a 100644
--- a/include/gpu/GrBackendSurface.h
+++ b/include/gpu/GrBackendSurface.h
@@ -15,14 +15,18 @@ struct GrGLTextureInfo;
 
 class GrBackendTexture {
 public:
+    // The passed in GrVkImageInfo must live until the GrBackendTexture is no longer used in
+    // creation of SkImages or SkSurfaces.
     GrBackendTexture(int width,
                      int height,
-                     GrVkImageInfo* vkInfo);
+                     const GrVkImageInfo* vkInfo);
 
+    // The passed in GrGLTextureInfo must live until the GrBackendTexture is no longer used in
+    // creation of SkImages or SkSurfaces.
     GrBackendTexture(int width,
                      int height,
                      GrPixelConfig config,
-                     GrGLTextureInfo* glInfo);
+                     const GrGLTextureInfo* glInfo);
 
     int width() const { return fWidth; }
     int height() const { return fHeight; }
@@ -31,11 +35,11 @@ public:
 
     // If the backend API is Vulkan, this returns a pointer to the GrVkImageInfo struct. Otherwise
     // it returns nullptr.
-    GrVkImageInfo* getVkImageInfo();
+    const GrVkImageInfo* getVkImageInfo() const;
 
     // If the backend API is GL, this returns a pointer to the GrGLTextureInfo struct. Otherwise
     // it returns nullptr.
-    GrGLTextureInfo* getGLTextureInfo();
+    const GrGLTextureInfo* getGLTextureInfo() const;
 
 private:
     // Temporary constructor which can be used to convert from a GrBackendTextureDesc.
@@ -51,26 +55,30 @@ private:
     GrBackend fBackend;
 
     union {
-        GrVkImageInfo*   fVkInfo;
-        GrGLTextureInfo* fGLInfo;
+        const GrVkImageInfo*   fVkInfo;
+        const GrGLTextureInfo* fGLInfo;
         GrBackendObject  fHandle;
     };
 };
 
 class GrBackendRenderTarget {
 public:
+    // The passed in GrVkImageInfo must live until the GrBackendTexture is no longer used in
+    // creation of SkImages or SkSurfaces.
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           int stencilBits,
-                          GrVkImageInfo* vkInfo);
+                          const GrVkImageInfo* vkInfo);
 
+    // The passed in GrGLTextureInfo must live until the GrBackendTexture is no longer used in
+    // creation of SkImages or SkSurfaces.
     GrBackendRenderTarget(int width,
                           int height,
                           int sampleCnt,
                           int stencilBits,
                           GrPixelConfig config,
-                          GrGLTextureInfo* glInfo);
+                          const GrGLTextureInfo* glInfo);
 
     int width() const { return fWidth; }
     int height() const { return fHeight; }
@@ -81,11 +89,11 @@ public:
 
     // If the backend API is Vulkan, this returns a pointer to the GrVkImageInfo struct. Otherwise
     // it returns nullptr.
-    GrVkImageInfo* getVkImageInfo();
+    const GrVkImageInfo* getVkImageInfo() const;
 
     // If the backend API is GL, this returns a pointer to the GrGLTextureInfo struct. Otherwise
     // it returns nullptr.
-    GrGLTextureInfo* getGLTextureInfo();
+    const GrGLTextureInfo* getGLTextureInfo() const;
 
 private:
     // Temporary constructor which can be used to convert from a GrBackendRenderTargetDesc.
@@ -104,8 +112,8 @@ private:
     GrBackend fBackend;
 
     union {
-        GrVkImageInfo*   fVkInfo;
-        GrGLTextureInfo* fGLInfo;
+        const GrVkImageInfo*   fVkInfo;
+        const GrGLTextureInfo* fGLInfo;
         GrBackendObject  fHandle;
     };
 };