SkMultiPictureDraw API

src/core/SkMultiPictureDraw.cpp

Index: src/core/SkMultiPictureDraw.cpp
diff --git a/src/core/SkMultiPictureDraw.cpp b/src/core/SkMultiPictureDraw.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..17993c0d5556947540155751c544eebbede1390d
--- /dev/null
+++ b/src/core/SkMultiPictureDraw.cpp
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkCanvas.h"
+#include "SkMultiPictureDraw.h"
+#include "SkPicture.h"
+
+SkMultiPictureDraw::SkMultiPictureDraw(int sizeHint) {
+    if (sizeHint > 0) {
+        fDrawData.setReserve(sizeHint);
+    }
+}
+
+void SkMultiPictureDraw::unrefAll() {
+    for (int i = 0; i < fDrawData.count(); ++i) {
+        fDrawData[i].pic->unref();
+        fDrawData[i].canvas->unref();
+    }
+
+    fDrawData.rewind();
+}
+
+void SkMultiPictureDraw::add(const SkPicture* picture, SkCanvas* canvas, const SkMatrix* matrix) {
+    if (NULL == picture || NULL == canvas) {
+        SkDEBUGFAIL("parameters to SkMultiPictureDraw::add should be non-NULL");
+        return;
+    }
+
+    DrawData* data = fDrawData.append();
+
+    data->pic = SkRef(picture);
+    data->canvas = SkRef(canvas);
+    if (NULL != matrix) {
+        data->matrix = *matrix;
+    } else {
+        data->matrix.setIdentity();
+    }
+    data->clipType = DrawData::kNone_ClipType;
+}
+
+void SkMultiPictureDraw::add(const SkPicture* picture, SkCanvas* canvas, const SkRect& clipRect, const SkMatrix* matrix) {
+    if (NULL == picture || NULL == canvas) {
+        SkDEBUGFAIL("parameters to SkMultiPictureDraw::add should be non-NULL");
+        return;
+    }
+
+    DrawData* data = fDrawData.append();
+
+    data->pic = SkRef(picture);
+    data->canvas = SkRef(canvas);
+    if (NULL != matrix) {
+        data->matrix = *matrix;
+    } else {
+        data->matrix.setIdentity();
+    }
+    data->clipType = DrawData::kRect_ClipType;
+    data->clipRRect.setRect(clipRect);
+}
+
+void SkMultiPictureDraw::add(const SkPicture* picture, SkCanvas* canvas, const SkRRect& clipRRect, const SkMatrix* matrix) {
+    if (NULL == picture || NULL == canvas) {
+        SkDEBUGFAIL("parameters to SkMultiPictureDraw::add should be non-NULL");
+        return;
+    }
+
+    DrawData* data = fDrawData.append();
+
+    data->pic = SkRef(picture);
+    data->canvas = SkRef(canvas);
+    if (NULL != matrix) {
+        data->matrix = *matrix;
+    } else {
+        data->matrix.setIdentity();
+    }
+    data->clipType = DrawData::kRRect_ClipType;
+    data->clipRRect = clipRRect;
+}
+
+void SkMultiPictureDraw::draw() {
+    for (int i = 0; i < fDrawData.count(); ++i) {
+        fDrawData[i].canvas->save();
+
+        switch (fDrawData[i].clipType) {
+        case DrawData::kRect_ClipType:
+            fDrawData[i].canvas->clipRect(fDrawData[i].clipRRect.rect());
+            break;
+        case DrawData::kRRect_ClipType:
+            fDrawData[i].canvas->clipRRect(fDrawData[i].clipRRect);
+            break;
+        case DrawData::kNone_ClipType:      // fall through
+        default:
+            break;
+        };
+
+        fDrawData[i].canvas->drawPicture(fDrawData[i].pic, &fDrawData[i].matrix, NULL);
+
+        fDrawData[i].canvas->restore();
+    }
+
+    this->unrefAll();
+}
+