blob: f8c713adfcc1ab468136a585852312b76115507f (
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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
// 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.
#ifndef WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_
#define WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_
#include "base/basictypes.h"
#include "base/scoped_ptr.h"
#include "third_party/ppapi/c/ppb_image_data.h"
#include "webkit/glue/plugins/pepper_plugin_delegate.h"
#include "webkit/glue/plugins/pepper_resource.h"
namespace skia {
class PlatformCanvas;
}
struct PPB_ImageDataTrusted;
class SkBitmap;
namespace pepper {
class ImageData : public Resource {
public:
explicit ImageData(PluginModule* module);
virtual ~ImageData();
int width() const { return width_; }
int height() const { return height_; }
// Returns the image format.
PP_ImageDataFormat format() const { return format_; }
// Returns true if this image is mapped. False means that the image is either
// invalid or not mapped. See ImageDataAutoMapper below.
bool is_mapped() const { return !!mapped_canvas_.get(); }
PluginDelegate::PlatformImage2D* platform_image() const {
return platform_image_.get();
}
// Returns a pointer to the interface implementing PPB_ImageData that is
// exposed to the plugin.
static const PPB_ImageData* GetInterface();
static const PPB_ImageDataTrusted* GetTrustedInterface();
// Returns the image data format used by the browser. If the plugin uses the
// same format, there is no conversion. Otherwise the browser will be in
// charge of converting from a supported format to its native format.
static PP_ImageDataFormat GetNativeImageDataFormat();
// Returns true if the format is supported by the browser.
static bool IsImageDataFormatSupported(PP_ImageDataFormat format);
// Resource overrides.
virtual ImageData* AsImageData() { return this; }
// PPB_ImageData implementation.
bool Init(PP_ImageDataFormat format,
int width, int height,
bool init_to_zero);
void Describe(PP_ImageDataDesc* desc) const;
void* Map();
void Unmap();
// PPB_ImageDataTrusted implementation.
uint64 GetNativeMemoryHandle() const;
// The mapped bitmap and canvas will be NULL if the image is not mapped.
skia::PlatformCanvas* mapped_canvas() const { return mapped_canvas_.get(); }
const SkBitmap* GetMappedBitmap() const;
// Swaps the guts of this image data with another.
void Swap(ImageData* other);
private:
// This will be NULL before initialization, and if this ImageData is
// swapped with another.
scoped_ptr<PluginDelegate::PlatformImage2D> platform_image_;
// When the device is mapped, this is the image. Null when umapped.
scoped_ptr<skia::PlatformCanvas> mapped_canvas_;
PP_ImageDataFormat format_;
int width_;
int height_;
DISALLOW_COPY_AND_ASSIGN(ImageData);
};
// Manages mapping an image resource if necessary. Use this to ensure the
// image is mapped. The destructor will put the image back into the previous
// state. You must check is_valid() to make sure the image was successfully
// mapped before using it.
//
// Example:
// ImageDataAutoMapper mapper(image_data);
// if (!mapper.is_valid())
// return utter_failure;
// image_data->mapped_canvas()->blah(); // Guaranteed valid.
class ImageDataAutoMapper {
public:
ImageDataAutoMapper(ImageData* image_data) : image_data_(image_data) {
if (image_data_->is_mapped()) {
is_valid_ = true;
needs_unmap_ = false;
} else {
is_valid_ = needs_unmap_ = !!image_data_->Map();
}
}
~ImageDataAutoMapper() {
if (needs_unmap_)
image_data_->Unmap();
}
// Check this to see if the image was successfully mapped. If this is false,
// the image could not be mapped and is unusable.
bool is_valid() const { return is_valid_; }
private:
ImageData* image_data_;
bool is_valid_;
bool needs_unmap_;
DISALLOW_COPY_AND_ASSIGN(ImageDataAutoMapper);
};
} // namespace pepper
#endif // WEBKIT_GLUE_PLUGINS_PEPPER_IMAGE_DATA_H_
|
