1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/views/shadow_border.h" 6 7 #include "ui/gfx/canvas.h" 8 #include "ui/gfx/insets.h" 9 #include "ui/gfx/shadow_value.h" 10 #include "ui/gfx/skia_util.h" 11 12 namespace views { 13 14 ShadowBorder::ShadowBorder(int blur, 15 SkColor color, 16 int vertical_offset, 17 int horizontal_offset) 18 : views::Border(), 19 blur_(blur), 20 color_(color), 21 vertical_offset_(vertical_offset), 22 horizontal_offset_(horizontal_offset) {} 23 24 ShadowBorder::~ShadowBorder() {} 25 26 // TODO(sidharthms): Re-painting a shadow looper on every paint call may yield 27 // poor performance. Ideally we should be caching the border to bitmaps. 28 void ShadowBorder::Paint(const views::View& view, gfx::Canvas* canvas) { 29 SkPaint paint; 30 std::vector<gfx::ShadowValue> shadows; 31 shadows.push_back(gfx::ShadowValue(gfx::Point(), blur_, color_)); 32 skia::RefPtr<SkDrawLooper> looper = gfx::CreateShadowDrawLooper(shadows); 33 paint.setLooper(looper.get()); 34 paint.setColor(SK_ColorTRANSPARENT); 35 paint.setStrokeJoin(SkPaint::kRound_Join); 36 gfx::Rect bounds(view.size()); 37 bounds.Inset(gfx::Insets(blur_ / 2, blur_ / 2, blur_ / 2, blur_ / 2)); 38 canvas->DrawRect(bounds, paint); 39 } 40 41 gfx::Insets ShadowBorder::GetInsets() const { 42 return gfx::Insets(blur_ / 2 - vertical_offset_, 43 blur_ / 2 - horizontal_offset_, 44 blur_ / 2 + vertical_offset_, 45 blur_ / 2 + horizontal_offset_); 46 } 47 48 } // namespace views 49
