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/rect.h" 10 #include "ui/gfx/shadow_value.h" 11 #include "ui/gfx/skia_util.h" 12 #include "ui/views/view.h" 13 14 namespace views { 15 16 ShadowBorder::ShadowBorder(int blur, 17 SkColor color, 18 int vertical_offset, 19 int horizontal_offset) 20 : views::Border(), 21 blur_(blur), 22 color_(color), 23 vertical_offset_(vertical_offset), 24 horizontal_offset_(horizontal_offset) {} 25 26 ShadowBorder::~ShadowBorder() {} 27 28 // TODO(sidharthms): Re-painting a shadow looper on every paint call may yield 29 // poor performance. Ideally we should be caching the border to bitmaps. 30 void ShadowBorder::Paint(const views::View& view, gfx::Canvas* canvas) { 31 SkPaint paint; 32 std::vector<gfx::ShadowValue> shadows; 33 shadows.push_back(gfx::ShadowValue(gfx::Point(), blur_, color_)); 34 skia::RefPtr<SkDrawLooper> looper = gfx::CreateShadowDrawLooper(shadows); 35 paint.setLooper(looper.get()); 36 paint.setColor(SK_ColorTRANSPARENT); 37 paint.setStrokeJoin(SkPaint::kRound_Join); 38 gfx::Rect bounds(view.size()); 39 // TODO(pkasting): This isn't right if one of the offsets is larger than 40 // (blur_ / 2). 41 bounds.Inset(gfx::Insets(blur_ / 2, blur_ / 2, blur_ / 2, blur_ / 2)); 42 canvas->DrawRect(bounds, paint); 43 } 44 45 gfx::Insets ShadowBorder::GetInsets() const { 46 return gfx::Insets(blur_ / 2 - vertical_offset_, 47 blur_ / 2 - horizontal_offset_, 48 blur_ / 2 + vertical_offset_, 49 blur_ / 2 + horizontal_offset_); 50 } 51 52 gfx::Size ShadowBorder::GetMinimumSize() const { 53 return gfx::Size(blur_, blur_); 54 } 55 56 } // namespace views 57
