Add promise images for deferred instantiation of wrapped gpu textures

This will allow a client to make an SkImage that "wraps" a gpu texture,
however the client does need to supply the actual gpu texture at Image
creation time. Instead it is retrieve at flush time via a callback.

Bug: skia:
Change-Id: I6267a55ab7102101a7bd80a6f547b6a870d2df08
Reviewed-on: https://skia-review.googlesource.com/109021
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>

2 files changed, 26 insertions, 0 deletions

diff --git a/tools/gpu/GrTest.cpp b/tools/gpu/GrTest.cpp
index 2160c7f47e..ae86aaed82 100644
--- a/tools/gpu/GrTest.cpp
+++ b/tools/gpu/GrTest.cpp
@@ -78,6 +78,30 @@ GrBackendTexture CreateBackendTexture(GrBackend backend, int width, int height,
     }
 }
 
+GrBackendFormat CreateBackendFormatFromTexture(const GrBackendTexture& tex) {
+    switch (tex.backend()) {
+#ifdef SK_VULKAN
+        case kVulkan_GrBackend: {
+            const GrVkImageInfo* vkInfo = tex.getVkImageInfo();
+            SkASSERT(vkInfo);
+            return GrBackendFormat::MakeVk(vkInfo->fFormat);
+        }
+#endif
+        case kOpenGL_GrBackend: {
+            const GrGLTextureInfo* glInfo = tex.getGLTextureInfo();
+            SkASSERT(glInfo);
+            return GrBackendFormat::MakeGL(glInfo->fFormat, glInfo->fTarget);
+        }
+        case kMock_GrBackend: {
+            const GrMockTextureInfo* mockInfo = tex.getMockTextureInfo();
+            SkASSERT(mockInfo);
+            return GrBackendFormat::MakeMock(mockInfo->fConfig);
+        }
+        default:
+            return GrBackendFormat();
+    }
+}
+
 }  // namespace GrTest
 
 bool GrSurfaceProxy::isWrapped_ForTesting() const {
diff --git a/tools/gpu/GrTest.h b/tools/gpu/GrTest.h
index 6666ab1a20..76e5e93e03 100644
--- a/tools/gpu/GrTest.h
+++ b/tools/gpu/GrTest.h
@@ -22,6 +22,8 @@ namespace GrTest {
     // TODO: remove this. It is only used in the SurfaceSemaphores Test.
     GrBackendTexture CreateBackendTexture(GrBackend, int width, int height,
                                           GrPixelConfig, GrMipMapped, GrBackendObject);
+
+    GrBackendFormat CreateBackendFormatFromTexture(const GrBackendTexture& tex);
 };
 
 #endif