1 files changed, 85 insertions, 0 deletions
diff --git a/libs/hwui/Patch.h b/libs/hwui/Patch.h
new file mode 100644
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--- /dev/null
+++ b/libs/hwui/Patch.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#ifndef ANDROID_UI_PATCH_H
+#define ANDROID_UI_PATCH_H
+
+#include <sys/types.h>
+
+#include <SkBitmap.h>
+
+#include "Vertex.h"
+
+namespace android {
+namespace uirenderer {
+
+/**
+ * Description of a patch.
+ */
+struct PatchDescription {
+    PatchDescription(): xCount(0), yCount(0) { }
+    PatchDescription(const uint32_t xCount, const uint32_t yCount):
+            xCount(xCount), yCount(yCount) { }
+    PatchDescription(const PatchDescription& description):
+            xCount(description.xCount), yCount(description.yCount) { }
+
+    uint32_t xCount;
+    uint32_t yCount;
+
+    bool operator<(const PatchDescription& rhs) const {
+        if (xCount == rhs.xCount) {
+            return yCount < rhs.yCount;
+        }
+        return xCount < rhs.xCount;
+    }
+
+    bool operator==(const PatchDescription& rhs) const {
+        return xCount == rhs.xCount && yCount == rhs.yCount;
+    }
+}; // struct PatchDescription
+
+/**
+ * An OpenGL patch. This contains an array of vertices and an array of
+ * indices to render the vertices.
+ */
+struct Patch {
+    Patch(const uint32_t xCount, const uint32_t yCount);
+    ~Patch();
+
+    void updateVertices(const SkBitmap* bitmap, float left, float top, float right, float bottom,
+            const int32_t* xDivs,  const int32_t* yDivs,
+            const uint32_t width, const uint32_t height);
+    void dump();
+
+    uint32_t xCount;
+    uint32_t yCount;
+
+    uint16_t* indices;
+    uint32_t indicesCount;
+
+    TextureVertex* vertices;
+    uint32_t verticesCount;
+
+private:
+    static inline void generateVertices(TextureVertex* vertex, float y, float v,
+            const int32_t xDivs[], uint32_t xCount, float xStretch, float xStretchTex,
+            float width, float widthTex);
+}; // struct Patch
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_UI_PATCH_H