graphics_2d.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
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 "ppapi/cpp/graphics_2d.h"
6
7#include "ppapi/c/pp_errors.h"
8#include "ppapi/c/ppb_graphics_2d.h"
9#include "ppapi/cpp/completion_callback.h"
10#include "ppapi/cpp/image_data.h"
11#include "ppapi/cpp/instance_handle.h"
12#include "ppapi/cpp/module.h"
13#include "ppapi/cpp/module_impl.h"
14#include "ppapi/cpp/point.h"
15#include "ppapi/cpp/rect.h"
16
17namespace pp {
18
19namespace {
20
21template <> const char* interface_name<PPB_Graphics2D_1_0>() {
22  return PPB_GRAPHICS_2D_INTERFACE_1_0;
23}
24
25template <> const char* interface_name<PPB_Graphics2D_1_1>() {
26  return PPB_GRAPHICS_2D_INTERFACE_1_1;
27}
28
29}  // namespace
30
31Graphics2D::Graphics2D() : Resource() {
32}
33
34Graphics2D::Graphics2D(const Graphics2D& other)
35    : Resource(other),
36      size_(other.size_) {
37}
38
39Graphics2D::Graphics2D(const InstanceHandle& instance,
40                       const Size& size,
41                       bool is_always_opaque)
42    : Resource() {
43  if (has_interface<PPB_Graphics2D_1_1>()) {
44    PassRefFromConstructor(get_interface<PPB_Graphics2D_1_1>()->Create(
45        instance.pp_instance(),
46        &size.pp_size(),
47        PP_FromBool(is_always_opaque)));
48  } else if (has_interface<PPB_Graphics2D_1_0>()) {
49    PassRefFromConstructor(get_interface<PPB_Graphics2D_1_0>()->Create(
50        instance.pp_instance(),
51        &size.pp_size(),
52        PP_FromBool(is_always_opaque)));
53  } else {
54    return;
55  }
56  if (!is_null()) {
57    // Only save the size if allocation succeeded.
58    size_ = size;
59  }
60}
61
62Graphics2D::~Graphics2D() {
63}
64
65Graphics2D& Graphics2D::operator=(const Graphics2D& other) {
66  Resource::operator=(other);
67  size_ = other.size_;
68  return *this;
69}
70
71void Graphics2D::PaintImageData(const ImageData& image,
72                                const Point& top_left) {
73  if (has_interface<PPB_Graphics2D_1_1>()) {
74    get_interface<PPB_Graphics2D_1_1>()->PaintImageData(pp_resource(),
75                                                        image.pp_resource(),
76                                                        &top_left.pp_point(),
77                                                        NULL);
78  } else if (has_interface<PPB_Graphics2D_1_0>()) {
79    get_interface<PPB_Graphics2D_1_0>()->PaintImageData(pp_resource(),
80                                                        image.pp_resource(),
81                                                        &top_left.pp_point(),
82                                                        NULL);
83  }
84}
85
86void Graphics2D::PaintImageData(const ImageData& image,
87                                const Point& top_left,
88                                const Rect& src_rect) {
89  if (has_interface<PPB_Graphics2D_1_1>()) {
90    get_interface<PPB_Graphics2D_1_1>()->PaintImageData(pp_resource(),
91                                                        image.pp_resource(),
92                                                        &top_left.pp_point(),
93                                                        &src_rect.pp_rect());
94  } else if (has_interface<PPB_Graphics2D_1_0>()) {
95    get_interface<PPB_Graphics2D_1_0>()->PaintImageData(pp_resource(),
96                                                        image.pp_resource(),
97                                                        &top_left.pp_point(),
98                                                        &src_rect.pp_rect());
99  }
100}
101
102void Graphics2D::Scroll(const Rect& clip, const Point& amount) {
103  if (has_interface<PPB_Graphics2D_1_1>()) {
104    get_interface<PPB_Graphics2D_1_1>()->Scroll(pp_resource(),
105                                                &clip.pp_rect(),
106                                                &amount.pp_point());
107  } else if (has_interface<PPB_Graphics2D_1_0>()) {
108    get_interface<PPB_Graphics2D_1_0>()->Scroll(pp_resource(),
109                                                &clip.pp_rect(),
110                                                &amount.pp_point());
111  }
112}
113
114void Graphics2D::ReplaceContents(ImageData* image) {
115  if (has_interface<PPB_Graphics2D_1_1>()) {
116    get_interface<PPB_Graphics2D_1_1>()->ReplaceContents(pp_resource(),
117                                                         image->pp_resource());
118  } else if (has_interface<PPB_Graphics2D_1_0>()) {
119    get_interface<PPB_Graphics2D_1_0>()->ReplaceContents(pp_resource(),
120                                                         image->pp_resource());
121  } else {
122    return;
123  }
124
125  // On success, reset the image data. This is to help prevent people
126  // from continuing to use the resource which will result in artifacts.
127  *image = ImageData();
128}
129
130int32_t Graphics2D::Flush(const CompletionCallback& cc) {
131  if (has_interface<PPB_Graphics2D_1_1>()) {
132    return get_interface<PPB_Graphics2D_1_1>()->Flush(
133        pp_resource(), cc.pp_completion_callback());
134  } else if (has_interface<PPB_Graphics2D_1_0>()) {
135    return get_interface<PPB_Graphics2D_1_0>()->Flush(
136        pp_resource(), cc.pp_completion_callback());
137  } else {
138    return cc.MayForce(PP_ERROR_NOINTERFACE);
139  }
140}
141
142bool Graphics2D::SetScale(float scale) {
143  if (!has_interface<PPB_Graphics2D_1_1>())
144    return false;
145  return PP_ToBool(get_interface<PPB_Graphics2D_1_1>()->SetScale(pp_resource(),
146                                                                 scale));
147}
148
149float Graphics2D::GetScale() {
150  if (!has_interface<PPB_Graphics2D_1_1>())
151    return 1.0f;
152  return get_interface<PPB_Graphics2D_1_1>()->GetScale(pp_resource());
153}
154
155}  // namespace pp
156