1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7 #include "include/core/SkDrawable.h"
8
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkMatrix.h"
11 #include "include/core/SkPaint.h"
12 #include "include/core/SkPicture.h" // IWYU pragma: keep
13 #include "include/core/SkPictureRecorder.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkRefCnt.h"
16 #include "include/core/SkScalar.h"
17
18 #include <atomic>
19 #include <cstddef>
20 #include <cstdint>
21
next_generation_id()22 static int32_t next_generation_id() {
23 static std::atomic<int32_t> nextID{1};
24
25 int32_t id;
26 do {
27 id = nextID.fetch_add(1, std::memory_order_relaxed);
28 } while (id == 0);
29 return id;
30 }
31
SkDrawable()32 SkDrawable::SkDrawable() : fGenerationID(0) {}
33
draw_bbox(SkCanvas * canvas,const SkRect & r)34 static void draw_bbox(SkCanvas* canvas, const SkRect& r) {
35 SkPaint paint;
36 paint.setStyle(SkPaint::kStroke_Style);
37 paint.setColor(0xFFFF7088);
38 canvas->drawRect(r, paint);
39 canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint);
40 canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint);
41 }
42
draw(SkCanvas * canvas,const SkMatrix * matrix)43 void SkDrawable::draw(SkCanvas* canvas, const SkMatrix* matrix) {
44 SkAutoCanvasRestore acr(canvas, true);
45 if (matrix) {
46 canvas->concat(*matrix);
47 }
48 this->onDraw(canvas);
49
50 if ((false)) {
51 draw_bbox(canvas, this->getBounds());
52 }
53 }
54
draw(SkCanvas * canvas,SkScalar x,SkScalar y)55 void SkDrawable::draw(SkCanvas* canvas, SkScalar x, SkScalar y) {
56 SkMatrix matrix = SkMatrix::Translate(x, y);
57 this->draw(canvas, &matrix);
58 }
59
makePictureSnapshot()60 sk_sp<SkPicture> SkDrawable::makePictureSnapshot() {
61 return this->onMakePictureSnapshot();
62 }
63
getGenerationID()64 uint32_t SkDrawable::getGenerationID() {
65 if (0 == fGenerationID) {
66 fGenerationID = next_generation_id();
67 }
68 return fGenerationID;
69 }
70
getBounds()71 SkRect SkDrawable::getBounds() {
72 return this->onGetBounds();
73 }
74
approximateBytesUsed()75 size_t SkDrawable::approximateBytesUsed() {
76 return this->onApproximateBytesUsed();
77 }
onApproximateBytesUsed()78 size_t SkDrawable::onApproximateBytesUsed() {
79 return 0;
80 }
81
notifyDrawingChanged()82 void SkDrawable::notifyDrawingChanged() {
83 fGenerationID = 0;
84 }
85
86 /////////////////////////////////////////////////////////////////////////////////////////
87
onMakePictureSnapshot()88 sk_sp<SkPicture> SkDrawable::onMakePictureSnapshot() {
89 SkPictureRecorder recorder;
90
91 const SkRect bounds = this->getBounds();
92 SkCanvas* canvas = recorder.beginRecording(bounds);
93 this->draw(canvas);
94 if ((false)) {
95 draw_bbox(canvas, bounds);
96 }
97 return recorder.finishRecordingAsPicture();
98 }
99