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1 // Copyright 2014 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/base/cursor/cursor_util.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "skia/ext/image_operations.h" | |
9 #include "ui/base/resource/resource_bundle.h" | |
10 #include "ui/gfx/image/image_skia.h" | |
11 #include "ui/gfx/point_conversions.h" | |
12 #include "ui/gfx/size_conversions.h" | |
13 #include "ui/gfx/skbitmap_operations.h" | |
14 #include "ui/gfx/skia_util.h" | |
15 | |
16 namespace ui { | |
17 | |
18 void ScaleAndRotateCursorBitmapAndHotpoint(float scale, | |
19 gfx::Display::Rotation rotation, | |
20 SkBitmap* bitmap, | |
21 gfx::Point* hotpoint) { | |
22 switch (rotation) { | |
23 case gfx::Display::ROTATE_0: | |
24 break; | |
25 case gfx::Display::ROTATE_90: | |
26 hotpoint->SetPoint(bitmap->height() - hotpoint->y(), hotpoint->x()); | |
27 *bitmap = SkBitmapOperations::Rotate( | |
28 *bitmap, SkBitmapOperations::ROTATION_90_CW); | |
29 break; | |
30 case gfx::Display::ROTATE_180: | |
31 hotpoint->SetPoint( | |
32 bitmap->width() - hotpoint->x(), bitmap->height() - hotpoint->y()); | |
33 *bitmap = SkBitmapOperations::Rotate( | |
34 *bitmap, SkBitmapOperations::ROTATION_180_CW); | |
35 break; | |
36 case gfx::Display::ROTATE_270: | |
37 hotpoint->SetPoint(hotpoint->y(), bitmap->width() - hotpoint->x()); | |
38 *bitmap = SkBitmapOperations::Rotate( | |
39 *bitmap, SkBitmapOperations::ROTATION_270_CW); | |
40 break; | |
41 } | |
42 | |
43 if (scale < FLT_EPSILON) { | |
44 NOTREACHED() << "Scale must be larger than 0."; | |
45 scale = 1.0f; | |
46 } | |
47 | |
48 if (scale == 1.0f) | |
49 return; | |
50 | |
51 gfx::Size scaled_size = gfx::ToFlooredSize( | |
52 gfx::ScaleSize(gfx::Size(bitmap->width(), bitmap->height()), scale)); | |
53 | |
54 *bitmap = skia::ImageOperations::Resize( | |
55 *bitmap, | |
56 skia::ImageOperations::RESIZE_BETTER, | |
57 scaled_size.width(), | |
58 scaled_size.height()); | |
59 *hotpoint = gfx::ToFlooredPoint(gfx::ScalePoint(*hotpoint, scale)); | |
60 } | |
61 | |
62 void GetImageCursorBitmap(int resource_id, | |
63 float scale, | |
64 gfx::Display::Rotation rotation, | |
65 gfx::Point* hotspot, | |
66 SkBitmap* bitmap) { | |
67 const gfx::ImageSkia* image = | |
68 ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id); | |
69 const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(scale); | |
70 // TODO(oshima): The cursor should use resource scale factor when | |
71 // fractional scale factor is enabled. crbug.com/372212 | |
72 (*bitmap) = image_rep.sk_bitmap(); | |
73 ScaleAndRotateCursorBitmapAndHotpoint( | |
74 scale / image_rep.scale(), rotation, bitmap, hotspot); | |
75 // |image_rep| is owned by the resource bundle. So we do not need to free it. | |
76 } | |
77 | |
78 void GetAnimatedCursorBitmaps(int resource_id, | |
79 float scale, | |
80 gfx::Display::Rotation rotation, | |
81 gfx::Point* hotspot, | |
82 std::vector<SkBitmap>* bitmaps) { | |
83 // TODO(oshima|tdanderson): Support rotation and fractional scale factor. | |
84 const gfx::ImageSkia* image = | |
85 ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id); | |
86 const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(scale); | |
87 SkBitmap bitmap = image_rep.sk_bitmap(); | |
88 int frame_width = bitmap.height(); | |
89 int frame_height = frame_width; | |
90 int total_width = bitmap.width(); | |
91 DCHECK_EQ(total_width % frame_width, 0); | |
92 int frame_count = total_width / frame_width; | |
93 DCHECK_GT(frame_count, 0); | |
94 | |
95 bitmaps->resize(frame_count); | |
96 | |
97 for (int frame = 0; frame < frame_count; ++frame) { | |
98 int x_offset = frame_width * frame; | |
99 DCHECK_LE(x_offset + frame_width, total_width); | |
100 | |
101 SkBitmap cropped = SkBitmapOperations::CreateTiledBitmap( | |
102 bitmap, x_offset, 0, frame_width, frame_height); | |
103 DCHECK_EQ(frame_width, cropped.width()); | |
104 DCHECK_EQ(frame_height, cropped.height()); | |
105 | |
106 (*bitmaps)[frame] = cropped; | |
107 } | |
108 } | |
109 | |
110 } // namespace ui | |
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