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
8#include "CanvasStateHelpers.h"
9#ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
10#include "SkCanvas.h"
11#include "SkCanvasStateUtils.h"
12#include "SkPaint.h"
13#include "SkRect.h"
14#include "SkRegion.h"
15
16void complex_layers_draw(SkCanvas* canvas, float left, float top,
17                         float right, float bottom, int32_t spacer) {
18    SkPaint bluePaint;
19    bluePaint.setColor(SK_ColorBLUE);
20    bluePaint.setStyle(SkPaint::kFill_Style);
21
22    SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
23    canvas->drawRect(rect, bluePaint);
24    canvas->translate(0, rect.height() + spacer);
25    canvas->drawRect(rect, bluePaint);
26}
27
28extern "C" bool complex_layers_draw_from_canvas_state(SkCanvasState* state,
29        float left, float top, float right, float bottom, int32_t spacer) {
30    SkCanvas* canvas = SkCanvasStateUtils::CreateFromCanvasState(state);
31    if (!canvas) {
32        return false;
33    }
34    complex_layers_draw(canvas, left, top, right, bottom, spacer);
35    canvas->unref();
36    return true;
37}
38
39void complex_clips_draw(SkCanvas* canvas, int32_t left, int32_t top,
40        int32_t right, int32_t bottom, int32_t clipOp, const SkRegion& localRegion) {
41    canvas->save();
42    SkRect clipRect = SkRect::MakeLTRB(SkIntToScalar(left), SkIntToScalar(top),
43                                       SkIntToScalar(right), SkIntToScalar(bottom));
44    canvas->clipRect(clipRect, (SkRegion::Op) clipOp);
45    canvas->drawColor(SK_ColorBLUE);
46    canvas->restore();
47
48    canvas->clipRegion(localRegion, (SkRegion::Op) clipOp);
49    canvas->drawColor(SK_ColorBLUE);
50}
51
52extern "C" bool complex_clips_draw_from_canvas_state(SkCanvasState* state,
53        int32_t left, int32_t top, int32_t right, int32_t bottom, int32_t clipOp,
54        int32_t regionRects, int32_t* rectCoords) {
55    SkCanvas* canvas = SkCanvasStateUtils::CreateFromCanvasState(state);
56    if (!canvas) {
57        return false;
58    }
59
60    SkRegion localRegion;
61    for (int32_t i = 0; i < regionRects; ++i) {
62        localRegion.op(rectCoords[0], rectCoords[1], rectCoords[2], rectCoords[3],
63                       SkRegion::kUnion_Op);
64        rectCoords += 4;
65    }
66
67    complex_clips_draw(canvas, left, top, right, bottom, clipOp, localRegion);
68    canvas->unref();
69    return true;
70}
71#endif // SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
72