submodule/skia/tests/CanvasStateHelpers.cpp

   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 "include/core/SkTypes.h"
   9
  10 #if !defined(SK_TEST_CANVAS_STATE_CROSS_LIBRARY)
  11
  12 #include "tests/CanvasStateHelpers.h"
  13
  14 #include "include/core/SkCanvas.h"
  15 #include "include/core/SkClipOp.h"
  16 #include "include/core/SkColor.h"
  17 #include "include/core/SkPaint.h"
  18 #include "include/core/SkRect.h"
  19 #include "include/core/SkRegion.h"
  20 #include "include/core/SkScalar.h"
  21 #include "include/utils/SkCanvasStateUtils.h"
  22
  23 #include <memory>
  24
  25 void complex_layers_draw(SkCanvas* canvas, float left, float top,
  26                          float right, float bottom, int32_t spacer) {
  27     SkPaint bluePaint;
  28     bluePaint.setColor(SK_ColorBLUE);
  29     bluePaint.setStyle(SkPaint::kFill_Style);
  30
  31     SkRect rect = SkRect::MakeLTRB(left, top, right, bottom);
  32     canvas->drawRect(rect, bluePaint);
  33     canvas->translate(0, rect.height() + spacer);
  34     canvas->drawRect(rect, bluePaint);
  35 }
  36
  37 extern "C" bool complex_layers_draw_from_canvas_state(SkCanvasState* state,
  38         float left, float top, float right, float bottom, int32_t spacer) {
  39     std::unique_ptr<SkCanvas> canvas = SkCanvasStateUtils::MakeFromCanvasState(state);
  40     if (!canvas) {
  41         return false;
  42     }
  43     complex_layers_draw(canvas.get(), left, top, right, bottom, spacer);
  44     return true;
  45 }
  46
  47 void complex_clips_draw(SkCanvas* canvas, int32_t left, int32_t top,
  48         int32_t right, int32_t bottom, int32_t clipOp, const SkRegion& localRegion) {
  49     canvas->save();
  50     SkRect clipRect = SkRect::MakeLTRB(SkIntToScalar(left), SkIntToScalar(top),
  51                                        SkIntToScalar(right), SkIntToScalar(bottom));
  52     canvas->clipRect(clipRect, (SkRegion::Op) clipOp);
  53     canvas->drawColor(SK_ColorBLUE);
  54     canvas->restore();
  55
  56     canvas->clipRegion(localRegion, (SkClipOp) clipOp);
  57     canvas->drawColor(SK_ColorBLUE);
  58 }
  59
  60 extern "C" bool complex_clips_draw_from_canvas_state(SkCanvasState* state,
  61         int32_t left, int32_t top, int32_t right, int32_t bottom, int32_t clipOp,
  62         int32_t regionRects, int32_t* rectCoords) {
  63     std::unique_ptr<SkCanvas> canvas = SkCanvasStateUtils::MakeFromCanvasState(state);
  64     if (!canvas) {
  65         return false;
  66     }
  67
  68     SkRegion localRegion;
  69     for (int32_t i = 0; i < regionRects; ++i) {
  70         localRegion.op({rectCoords[0], rectCoords[1], rectCoords[2], rectCoords[3]},
  71                        SkRegion::kUnion_Op);
  72         rectCoords += 4;
  73     }
  74
  75     complex_clips_draw(canvas.get(), left, top, right, bottom, clipOp, localRegion);
  76     return true;
  77 }
  78
  79 #endif // SK_TEST_CANVAS_STATE_CROSS_LIBRARY