blob: 801609b886c578dfffcc36b592fb557dde656261 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Base class for gles2 demos.
#ifndef GPU_DEMOS_FRAMEWORK_DEMO_H_
#define GPU_DEMOS_FRAMEWORK_DEMO_H_
#include "base/time.h"
namespace gpu {
namespace demos {
// Base class for GLES2 demos. The same demo class is supposed to be run as
// standalone apps (exe), pepper plugin (dll), and nacl module (nexe). This is
// accomplished by creating framework for each platfom and hosting the demo
// class object.
class Demo {
public:
Demo();
virtual ~Demo();
// Returns the title of demo. This title is used to name the window or
// html page where demo is running.
virtual const wchar_t* Title() const = 0;
// Initializes the size of the window on which this demo object will render.
void InitWindowSize(int width, int height);
// This function is called by the framework to initialize the OpenGL state
// required by this demo. When this function is called, it is assumed that
// a rendering context has already been created and made current.
virtual bool InitGL() = 0;
// This function is called by the framework to perform OpenGL rendering.
// When this function is called, it is assumed that the rendering context
// has been made current.
void Draw();
protected:
// Returns the width of window.
int width() const { return width_; }
// Returns the height of window.
int height() const { return height_; }
// The framework calls this function for the derived classes to do custom
// rendering. There is no default implementation. It must be defined by the
// derived classes. The elapsed_sec param represents the time elapsed
// (in seconds) after Render was called the last time. It can be used to
// make the application frame-rate independent. It is 0.0f for the
// first render call.
virtual void Render(float elapsed_sec) = 0;
private:
int width_; // Window width.
int height_; // Window height.
// Time at which draw was called last.
base::Time last_draw_time_;
DISALLOW_COPY_AND_ASSIGN(Demo);
};
} // namespace demos
} // namespace gpu
#endif // GPU_DEMOS_FRAMEWORK_DEMO_H_
|
