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    std::unique_ptr<SkCanvas> canvas = SkCanvasStateUtils::MakeFromCanvasState(state);
31    if (!canvas) {
32        return false;
33    }
34    complex_layers_draw(canvas.get(), left, top, right, bottom, spacer);
35    return true;
36}
37
38void complex_clips_draw(SkCanvas* canvas, int32_t left, int32_t top,
39        int32_t right, int32_t bottom, int32_t clipOp, const SkRegion& localRegion) {
40    canvas->save();
41    SkRect clipRect = SkRect::MakeLTRB(SkIntToScalar(left), SkIntToScalar(top),
42                                       SkIntToScalar(right), SkIntToScalar(bottom));
43    canvas->clipRect(clipRect, (SkRegion::Op) clipOp);
44    canvas->drawColor(SK_ColorBLUE);
45    canvas->restore();
46
47    canvas->clipRegion(localRegion, (SkClipOp) clipOp);
48    canvas->drawColor(SK_ColorBLUE);
49}
50
51extern "C" bool complex_clips_draw_from_canvas_state(SkCanvasState* state,
52        int32_t left, int32_t top, int32_t right, int32_t bottom, int32_t clipOp,
53        int32_t regionRects, int32_t* rectCoords) {
54    std::unique_ptr<SkCanvas> canvas = SkCanvasStateUtils::MakeFromCanvasState(state);
55    if (!canvas) {
56        return false;
57    }
58
59    SkRegion localRegion;
60    for (int32_t i = 0; i < regionRects; ++i) {
61        localRegion.op(rectCoords[0], rectCoords[1], rectCoords[2], rectCoords[3],
62                       SkRegion::kUnion_Op);
63        rectCoords += 4;
64    }
65
66    complex_clips_draw(canvas.get(), left, top, right, bottom, clipOp, localRegion);
67    return true;
68}
69#endif // SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
70