1// Copyright (c) 2012 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 "chrome/browser/ui/gtk/titlebar_throb_animation.h" 6#include "grit/theme_resources.h" 7#include "third_party/skia/include/core/SkBitmap.h" 8#include "ui/base/resource/resource_bundle.h" 9#include "ui/gfx/skbitmap_operations.h" 10 11namespace { 12 13// We don't bother to clean up these or the pixbufs they contain when we exit. 14std::vector<GdkPixbuf*>* g_throbber_frames = NULL; 15std::vector<GdkPixbuf*>* g_throbber_waiting_frames = NULL; 16 17// Load |resource_id| from the ResourceBundle and split it into a series of 18// square GdkPixbufs that get stored in |frames|. 19void MakeThrobberFrames(int resource_id, std::vector<GdkPixbuf*>* frames) { 20 ui::ResourceBundle &rb = ui::ResourceBundle::GetSharedInstance(); 21 SkBitmap frame_strip = rb.GetImageNamed(resource_id).AsBitmap(); 22 23 // Each frame of the animation is a square, so we use the height as the 24 // frame size. 25 int frame_size = frame_strip.height(); 26 size_t num_frames = frame_strip.width() / frame_size; 27 28 // Make a separate GdkPixbuf for each frame of the animation. 29 for (size_t i = 0; i < num_frames; ++i) { 30 SkBitmap frame = SkBitmapOperations::CreateTiledBitmap(frame_strip, 31 i * frame_size, 0, frame_size, frame_size); 32 frames->push_back(gfx::GdkPixbufFromSkBitmap(frame)); 33 } 34} 35 36} // namespace 37 38// TODO(tc): Handle anti-clockwise spinning when waiting for a connection. 39 40TitlebarThrobAnimation::TitlebarThrobAnimation() 41 : current_frame_(0), 42 current_waiting_frame_(0) { 43} 44 45GdkPixbuf* TitlebarThrobAnimation::GetNextFrame(bool is_waiting) { 46 InitFrames(); 47 if (is_waiting) { 48 return (*g_throbber_waiting_frames)[current_waiting_frame_++ % 49 g_throbber_waiting_frames->size()]; 50 } else { 51 return (*g_throbber_frames)[current_frame_++ % g_throbber_frames->size()]; 52 } 53} 54 55void TitlebarThrobAnimation::Reset() { 56 current_frame_ = 0; 57 current_waiting_frame_ = 0; 58} 59 60// static 61void TitlebarThrobAnimation::InitFrames() { 62 if (g_throbber_frames) 63 return; 64 65 // We load the light version of the throbber since it'll be in the titlebar. 66 g_throbber_frames = new std::vector<GdkPixbuf*>; 67 MakeThrobberFrames(IDR_THROBBER_LIGHT, g_throbber_frames); 68 69 g_throbber_waiting_frames = new std::vector<GdkPixbuf*>; 70 MakeThrobberFrames(IDR_THROBBER_WAITING_LIGHT, g_throbber_waiting_frames); 71} 72