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/gfx/point_conversions.h" 10 #include "ui/gfx/size_conversions.h" 11 #include "ui/gfx/skbitmap_operations.h" 12 #include "ui/gfx/skia_util.h" 13 14 namespace ui { 15 16 void ScaleAndRotateCursorBitmapAndHotpoint(float scale, 17 gfx::Display::Rotation rotation, 18 SkBitmap* bitmap, 19 gfx::Point* hotpoint) { 20 switch (rotation) { 21 case gfx::Display::ROTATE_0: 22 break; 23 case gfx::Display::ROTATE_90: 24 hotpoint->SetPoint(bitmap->height() - hotpoint->y(), hotpoint->x()); 25 *bitmap = SkBitmapOperations::Rotate( 26 *bitmap, SkBitmapOperations::ROTATION_90_CW); 27 break; 28 case gfx::Display::ROTATE_180: 29 hotpoint->SetPoint( 30 bitmap->width() - hotpoint->x(), bitmap->height() - hotpoint->y()); 31 *bitmap = SkBitmapOperations::Rotate( 32 *bitmap, SkBitmapOperations::ROTATION_180_CW); 33 break; 34 case gfx::Display::ROTATE_270: 35 hotpoint->SetPoint(hotpoint->y(), bitmap->width() - hotpoint->x()); 36 *bitmap = SkBitmapOperations::Rotate( 37 *bitmap, SkBitmapOperations::ROTATION_270_CW); 38 break; 39 } 40 41 if (scale < FLT_EPSILON) { 42 NOTREACHED() << "Scale must be larger than 0."; 43 scale = 1.0f; 44 } 45 46 if (scale == 1.0f) 47 return; 48 49 gfx::Size scaled_size = gfx::ToFlooredSize( 50 gfx::ScaleSize(gfx::Size(bitmap->width(), bitmap->height()), scale)); 51 52 *bitmap = skia::ImageOperations::Resize( 53 *bitmap, 54 skia::ImageOperations::RESIZE_BETTER, 55 scaled_size.width(), 56 scaled_size.height()); 57 *hotpoint = gfx::ToFlooredPoint(gfx::ScalePoint(*hotpoint, scale)); 58 } 59 60 } // namespace ui 61
