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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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