1 files changed, 50 insertions, 0 deletions
diff --git a/libs/hwui/canvas/CanvasOpRasterizer.cpp b/libs/hwui/canvas/CanvasOpRasterizer.cpp
new file mode 100644
index 000000000000..25129f641c00
--- /dev/null
+++ b/libs/hwui/canvas/CanvasOpRasterizer.cpp
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "CanvasOpRasterizer.h"
+
+#include <SkCanvas.h>
+#include <log/log.h>
+
+#include <vector>
+
+#include "CanvasOpBuffer.h"
+#include "CanvasOps.h"
+
+namespace android::uirenderer {
+
+void rasterizeCanvasBuffer(const CanvasOpBuffer& source, SkCanvas* destination) {
+    // Tracks the global transform from the current display list back toward the display space
+    // Push on beginning a RenderNode draw, pop on ending one
+    std::vector<SkMatrix> globalMatrixStack;
+    SkMatrix& currentGlobalTransform = globalMatrixStack.emplace_back(SkMatrix::I());
+
+    source.for_each([&]<CanvasOpType T>(const CanvasOpContainer<T> * op) {
+        if constexpr (T == CanvasOpType::BeginZ || T == CanvasOpType::EndZ) {
+            // Do beginZ or endZ
+            LOG_ALWAYS_FATAL("TODO");
+            return;
+        } else {
+            // Generic OP
+            // First apply the current transformation
+            destination->setMatrix(SkMatrix::Concat(currentGlobalTransform, op->transform()));
+            // Now draw it
+            (*op)->draw(destination);
+        }
+    });
+}
+
+}  // namespace android::uirenderer