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* exposed function bool try_get_color(const std::wstring& str, uint32_t& value) from...
[casparcg] / core / producer / color / color_producer.cpp
1 /*
2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
3 *
4 * This file is part of CasparCG (www.casparcg.com).
5 *
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
18 *
19 * Author: Robert Nagy, ronag89@gmail.com
20 */
21
22 #include "../../stdafx.h"
23
24 #include "color_producer.h"
25
26 #include <core/producer/frame_producer.h>
27 #include <core/frame/frame.h>
28 #include <core/frame/draw_frame.h>
29 #include <core/frame/frame_factory.h>
30 #include <core/frame/pixel_format.h>
31 #include <core/monitor/monitor.h>
32
33 #include <common/except.h>
34 #include <common/array.h>
35
36 #include <boost/algorithm/string.hpp>
37
38 #include <sstream>
39
40 namespace caspar { namespace core {
41         
42 class color_producer : public frame_producer_base
43 {
44         monitor::basic_subject  event_subject_;
45
46         const std::wstring              color_str_;
47         constraints                             constraints_;
48         draw_frame                              frame_;
49
50 public:
51         explicit color_producer(const spl::shared_ptr<core::frame_factory>& frame_factory, const std::wstring& color) 
52                 : color_str_(color)
53                 , constraints_(1, 1)
54                 , frame_(create_color_frame(this, frame_factory, color))
55         {
56                 CASPAR_LOG(info) << print() << L" Initialized";
57         }
58
59         // frame_producer
60                         
61         draw_frame receive_impl() override
62         {
63                 event_subject_ << monitor::event("color") % color_str_;
64
65                 return frame_;
66         }
67
68         constraints& pixel_constraints() override
69         {
70                 return constraints_;
71         }
72         
73         std::wstring print() const override
74         {
75                 return L"color[" + color_str_ + L"]";
76         }
77
78         std::wstring name() const override
79         {
80                 return L"color";
81         }
82         
83         boost::property_tree::wptree info() const override
84         {
85                 boost::property_tree::wptree info;
86                 info.add(L"type", L"color");
87                 info.add(L"color", color_str_);
88                 return info;
89         }
90
91         void subscribe(const monitor::observable::observer_ptr& o) override                                                                                                                     
92         {
93                 return event_subject_.subscribe(o);
94         }
95
96         void unsubscribe(const monitor::observable::observer_ptr& o) override           
97         {
98                 return event_subject_.unsubscribe(o);
99         }
100 };
101
102 std::wstring get_hex_color(const std::wstring& str)
103 {
104         if(str.at(0) == '#')
105                 return str.length() == 7 ? L"#FF" + str.substr(1) : str;
106         
107         std::wstring col_str = boost::to_upper_copy(str);
108
109         if(col_str == L"EMPTY")
110                 return L"#00000000";
111
112         if(col_str == L"BLACK")
113                 return L"#FF000000";
114         
115         if(col_str == L"WHITE")
116                 return L"#FFFFFFFF";
117         
118         if(col_str == L"RED")
119                 return L"#FFFF0000";
120         
121         if(col_str == L"GREEN")
122                 return L"#FF00FF00";
123         
124         if(col_str == L"BLUE")
125                 return L"#FF0000FF";    
126         
127         if(col_str == L"ORANGE")
128                 return L"#FFFFA500";    
129         
130         if(col_str == L"YELLOW")
131                 return L"#FFFFFF00";
132         
133         if(col_str == L"BROWN")
134                 return L"#FFA52A2A";
135         
136         if(col_str == L"GRAY")
137                 return L"#FF808080";
138         
139         if(col_str == L"TEAL")
140                 return L"#FF008080";
141         
142         return str;
143 }
144
145 bool try_get_color(const std::wstring& str, uint32_t& value)
146 {
147         auto color_str = get_hex_color(str);
148         if(color_str.length() != 9 || color_str[0] != '#')
149                 return false;
150
151         std::wstringstream ss(color_str.substr(1));
152         if(!(ss >> std::hex >> value) || !ss.eof())
153                 return false;
154         
155         return true;
156 }
157
158 spl::shared_ptr<frame_producer> create_color_producer(const spl::shared_ptr<frame_factory>& frame_factory, const std::vector<std::wstring>& params)
159 {
160         if(params.size() < 0)
161                 return core::frame_producer::empty();
162
163         uint32_t value = 0;
164         if(!try_get_color(params[0], value))
165                 return core::frame_producer::empty();
166
167         return spl::make_shared<color_producer>(frame_factory, params[0]);
168 }
169
170 draw_frame create_color_frame(void* tag, const spl::shared_ptr<frame_factory>& frame_factory, const std::wstring& str)
171 {
172         core::pixel_format_desc desc(pixel_format::bgra);
173         desc.planes.push_back(core::pixel_format_desc::plane(1, 1, 4));
174         auto frame = frame_factory->create_frame(tag, desc);
175         
176         uint32_t value = 0;
177         if(!try_get_color(str, value))
178                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("color") << arg_value_info(str) << msg_info("Invalid color."));
179
180         *reinterpret_cast<uint32_t*>(frame.image_data(0).begin()) = value;
181
182         return core::draw_frame(std::move(frame));
183 }
184
185 }}