remove legacy support for old old picture versions

Bug: skia:
Change-Id: Ieb97eabdb18e8c7bfa86e6a1fc6e0389cd096daa
Reviewed-on: https://skia-review.googlesource.com/89860
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/src/shaders/SkComposeShader.cpp b/src/shaders/SkComposeShader.cpp
index 34e54863b7..2feae7788e 100644
--- a/src/shaders/SkComposeShader.cpp
+++ b/src/shaders/SkComposeShader.cpp
@@ -43,17 +43,12 @@ sk_sp<SkFlattenable> SkComposeShader::CreateProc(SkReadBuffer& buffer) {
     sk_sp<SkShader> dst(buffer.readShader());
     sk_sp<SkShader> src(buffer.readShader());
     unsigned        mode = buffer.read32();
-
-    float lerp = 1;
-    if (!buffer.isVersionLT(SkReadBuffer::kComposeShaderCanLerp_Version)) {
-        lerp = buffer.readScalar();
-    }
+    float           lerp = buffer.readScalar();
 
     // check for valid mode before we cast to the enum type
-    if (mode > (unsigned)SkBlendMode::kLastMode) {
+    if (!buffer.validate(mode <= (unsigned)SkBlendMode::kLastMode)) {
         return nullptr;
     }
-
     return MakeCompose(std::move(dst), std::move(src), static_cast<SkBlendMode>(mode), lerp);
 }