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1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "CoreAnimationRenderer.h"
28
29#import <WebKitSystemInterface.h>
30#import <QuartzCore/QuartzCore.h>
31#import <OpenGL/CGLMacro.h>
32
33// The CGLMacro.h header adds an implicit CGLContextObj parameter to all OpenGL calls,
34// which is good because it allows us to make OpenGL calls without saving and restoring the
35// current context. The context argument is named "cgl_ctx" by default, so we use the macro
36// below to declare this variable.
37#define DECLARE_GL_CONTEXT_VARIABLE(name) \
38    CGLContextObj cgl_ctx = (name)
39
40namespace WebKit {
41
42PassRefPtr<CoreAnimationRenderer> CoreAnimationRenderer::create(Client* client, CGLContextObj cglContextObj, CALayer *layer)
43{
44    return adoptRef(new CoreAnimationRenderer(client, cglContextObj, layer));
45}
46
47CoreAnimationRenderer::CoreAnimationRenderer(Client* client, CGLContextObj cglContextObj, CALayer *layer)
48    : m_client(client)
49    , m_cglContext(cglContextObj)
50    , m_renderer([CARenderer rendererWithCGLContext:m_cglContext options:nil])
51{
52    [m_renderer.get() setLayer:layer];
53
54    WKCARendererAddChangeNotificationObserver(m_renderer.get(), rendererDidChange, this);
55}
56
57CoreAnimationRenderer::~CoreAnimationRenderer()
58{
59    ASSERT(!m_client);
60}
61
62void CoreAnimationRenderer::setBounds(CGRect bounds)
63{
64    [m_renderer.get() setBounds:bounds];
65
66    [CATransaction begin];
67    [CATransaction setDisableActions:YES];
68    [[m_renderer.get() layer] setFrame:bounds];
69    [CATransaction commit];
70}
71
72void CoreAnimationRenderer::render(CFTimeInterval frameTime, CVTimeStamp* timeStamp, CFTimeInterval& nextFrameTime)
73{
74    [m_renderer.get() beginFrameAtTime:frameTime timeStamp:timeStamp];
75    [m_renderer.get() render];
76    nextFrameTime = [m_renderer.get() nextFrameTime];
77    [m_renderer.get() endFrame];
78}
79
80void CoreAnimationRenderer::invalidate()
81{
82    ASSERT(m_client);
83
84    WKCARendererRemoveChangeNotificationObserver(m_renderer.get(), rendererDidChange, this);
85    m_client = 0;
86}
87
88void CoreAnimationRenderer::rendererDidChange(void* context)
89{
90    static_cast<CoreAnimationRenderer*>(context)->rendererDidChange();
91}
92
93void CoreAnimationRenderer::rendererDidChange()
94{
95    ASSERT(m_client);
96
97    m_client->rendererDidChange(this);
98}
99
100} // namespace WebKit
101