vertices to/from data

precursor to enabling serialization in pictures

BUG=skia:6366

Change-Id: Iba89aa98f389b3281e7705d041e3337e89071f03
Reviewed-on: https://skia-review.googlesource.com/9680
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/VerticesTest.cpp b/tests/VerticesTest.cpp
new file mode 100644
index 0000000000..9c433baf86
--- /dev/null
+++ b/tests/VerticesTest.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2017 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkVertices.h"
+#include "Test.h"
+
+static bool equal(const SkVertices* v0, const SkVertices* v1) {
+    if (v0->mode() != v1->mode()) {
+        return false;
+    }
+    if (v0->vertexCount() != v1->vertexCount()) {
+        return false;
+    }
+    if (v0->indexCount() != v1->indexCount()) {
+        return false;
+    }
+
+    if (!!v0->texCoords() != !!v1->texCoords()) {
+        return false;
+    }
+    if (!!v0->colors() != !!v1->colors()) {
+        return false;
+    }
+
+    for (int i = 0; i < v0->vertexCount(); ++i) {
+        if (v0->positions()[i] != v1->positions()[i]) {
+            return false;
+        }
+        if (v0->texCoords()) {
+            if (v0->texCoords()[i] != v1->texCoords()[i]) {
+                return false;
+            }
+        }
+        if (v0->colors()) {
+            if (v0->colors()[i] != v1->colors()[i]) {
+                return false;
+            }
+        }
+    }
+    for (int i = 0; i < v0->indexCount(); ++i) {
+        if (v0->indices()[i] != v1->indices()[i]) {
+            return false;
+        }
+    }
+    return true;
+}
+
+DEF_TEST(Vertices, reporter) {
+    int vCount = 4;
+    int iCount = 6;
+
+    const uint32_t texFlags[] = { 0, SkVertices::kHasTexs_Flag };
+    const uint32_t colFlags[] = { 0, SkVertices::kHasColors_Flag };
+    for (auto texF : texFlags) {
+        for (auto colF : colFlags) {
+            uint32_t flags = texF | colF;
+
+            SkVertices::Builder builder(SkCanvas::kTriangles_VertexMode, vCount, iCount, flags);
+
+            for (int i = 0; i < vCount; ++i) {
+                float x = (float)i;
+                builder.positions()[i].set(x, 1);
+                if (builder.texCoords()) {
+                    builder.texCoords()[i].set(x, 2);
+                }
+                if (builder.colors()) {
+                    builder.colors()[i] = SkColorSetARGB(0xFF, i, 0x80, 0);
+                }
+            }
+            for (int i = 0; i < builder.indexCount(); ++i) {
+                builder.indices()[i] = i % vCount;
+            }
+
+            sk_sp<SkVertices> v0 = builder.detach();
+            sk_sp<SkData> data = v0->encode();
+            sk_sp<SkVertices> v1 = SkVertices::Decode(data->data(), data->size());
+
+            REPORTER_ASSERT(reporter, equal(v0.get(), v1.get()));
+        }
+    }
+}