/*
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* Copyright 2014 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkCanvas.h"
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#include "SkDrawable.h"
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#include <atomic>
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static int32_t next_generation_id() {
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static std::atomic<int32_t> nextID{1};
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int32_t id;
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do {
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id = nextID++;
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} while (id == 0);
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return id;
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}
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SkDrawable::SkDrawable() : fGenerationID(0) {}
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static void draw_bbox(SkCanvas* canvas, const SkRect& r) {
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setColor(0xFFFF7088);
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canvas->drawRect(r, paint);
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canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint);
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canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint);
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}
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void SkDrawable::draw(SkCanvas* canvas, const SkMatrix* matrix) {
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SkAutoCanvasRestore acr(canvas, true);
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if (matrix) {
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canvas->concat(*matrix);
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}
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this->onDraw(canvas);
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if (false) {
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draw_bbox(canvas, this->getBounds());
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}
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}
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void SkDrawable::draw(SkCanvas* canvas, SkScalar x, SkScalar y) {
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SkMatrix matrix = SkMatrix::MakeTrans(x, y);
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this->draw(canvas, &matrix);
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}
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SkPicture* SkDrawable::newPictureSnapshot() {
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return this->onNewPictureSnapshot();
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}
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uint32_t SkDrawable::getGenerationID() {
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if (0 == fGenerationID) {
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fGenerationID = next_generation_id();
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}
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return fGenerationID;
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}
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SkRect SkDrawable::getBounds() {
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return this->onGetBounds();
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}
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void SkDrawable::notifyDrawingChanged() {
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fGenerationID = 0;
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}
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/////////////////////////////////////////////////////////////////////////////////////////
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#include "SkPictureRecorder.h"
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SkPicture* SkDrawable::onNewPictureSnapshot() {
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SkPictureRecorder recorder;
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const SkRect bounds = this->getBounds();
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SkCanvas* canvas = recorder.beginRecording(bounds, nullptr, 0);
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this->draw(canvas);
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if (false) {
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draw_bbox(canvas, bounds);
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}
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return recorder.finishRecordingAsPicture().release();
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}
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