Add new SkImage factory to create from GrBackendTexture with SkColorType

Bug: skia:
Change-Id: I46bdc54b6d9cdacc8f5a06644aa6b110837879f0
Reviewed-on: https://skia-review.googlesource.com/84342
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>

2 files changed, 16 insertions, 0 deletions

diff --git a/include/gpu/GrBackendSurface.h b/include/gpu/GrBackendSurface.h
index 1eab3577b1..9f77155e39 100644
--- a/include/gpu/GrBackendSurface.h
+++ b/include/gpu/GrBackendSurface.h
@@ -84,8 +84,11 @@ public:
 private:
     // Friending for access to the GrPixelConfig
     friend class SkSurface;
+    friend class GrCaps;
     friend class GrGpu;
+    friend class GrGLCaps;
     friend class GrGLGpu;
+    friend class GrVkCaps;
     friend class GrVkGpu;
     GrPixelConfig config() const { return fConfig; }
 
@@ -146,8 +149,11 @@ public:
 private:
     // Friending for access to the GrPixelConfig
     friend class SkSurface;
+    friend class GrCaps;
     friend class GrGpu;
+    friend class GrGLCaps;
     friend class GrGLGpu;
+    friend class GrVkCaps;
     friend class GrVkGpu;
     GrPixelConfig config() const { return fConfig; }
 
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index 6cdc0e3ff6..59e0528a23 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -11,9 +11,11 @@
 #include "../private/GrTypesPriv.h"
 #include "GrBlend.h"
 #include "GrShaderCaps.h"
+#include "SkImageInfo.h"
 #include "SkRefCnt.h"
 #include "SkString.h"
 
+class GrBackendTexture;
 struct GrContextOptions;
 class GrRenderTargetProxy;
 class SkJSONWriter;
@@ -170,6 +172,13 @@ public:
     virtual bool initDescForDstCopy(const GrRenderTargetProxy* src, GrSurfaceDesc* desc,
                                     bool* rectsMustMatch, bool* disallowSubrect) const = 0;
 
+    /**
+     * Returns true if the GrBackendTexutre can we used with the supplied SkColorType. If it is
+     * compatible, the GrPixelConfig on the GrBackendTexture will be set to a config that matches
+     * the backend format and requested SkColorType.
+     */
+    bool validateBackendTexture(GrBackendTexture* tex, SkColorType ct) const;
+
 protected:
     /** Subclasses must call this at the end of their constructors in order to apply caps
         overrides requested by the client. Note that overrides will only reduce the caps never
@@ -229,6 +238,7 @@ protected:
     int fMaxClipAnalyticFPs;
 
 private:
+    virtual bool onValidateBackendTexture(GrBackendTexture* tex, SkColorType ct) const = 0;
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {}
     virtual void onDumpJSON(SkJSONWriter*) const {}