commit ead321bdfe762e6e77aebe0f90e8afe1952f5de8
author Robert Phillips <robertphillips@google.com> Thu Dec 19 10:16:32 2019 -0500
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Thu Dec 19 16:15:49 2019 +0000
tree dbfa2414bfc2dda2d0709d7151c0a988f7c029f1
parent de30e4233fff452a565215b6c3ac87a67d965e0c

Add glue to link the GrContext createCompressedBackendTexture API to the GL and Vulkan backends

Bug: skia:9680
Change-Id: I05230ec8fd4f9733ba868fd595b163a79c30d32a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/261081
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

src/image/SkImage_GpuBase.cpp

diff --git a/src/image/SkImage_GpuBase.cpp b/src/image/SkImage_GpuBase.cpp
index 420e357..5e8a079 100644
--- a/src/image/SkImage_GpuBase.cpp
+++ b/src/image/SkImage_GpuBase.cpp
@@ -57,6 +57,34 @@
     return caps->areColorTypeAndFormatCompatible(grCT, backendFormat);
 }
 
+bool SkImage_GpuBase::ValidateCompressedBackendTexture(const GrCaps* caps,
+                                                       const GrBackendTexture& tex,
+                                                       SkAlphaType at) {
+
+    if (!tex.isValid() || tex.width() <= 0 || tex.height() <= 0) {
+        return false;
+    }
+
+    if (tex.width() > caps->maxTextureSize() || tex.height() > caps->maxTextureSize()) {
+        return false;
+    }
+
+    if (at == kUnknown_SkAlphaType) {
+        return false;
+    }
+
+    GrBackendFormat backendFormat = tex.getBackendFormat();
+    if (!backendFormat.isValid()) {
+        return false;
+    }
+
+    if (!caps->isFormatCompressed(backendFormat)) {
+        return false;
+    }
+
+    return true;
+}
+
 //////////////////////////////////////////////////////////////////////////////////////////////////
 
 bool SkImage_GpuBase::getROPixels(SkBitmap* dst, CachingHint chint) const {