1 | |
2 | // |
3 | // This source file is part of appleseed. |
4 | // Visit http://appleseedhq.net/ for additional information and resources. |
5 | // |
6 | // This software is released under the MIT license. |
7 | // |
8 | // Copyright (c) 2010-2013 Francois Beaune, Jupiter Jazz Limited |
9 | // Copyright (c) 2014-2017 Francois Beaune, The appleseedhq Organization |
10 | // |
11 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
12 | // of this software and associated documentation files (the "Software"), to deal |
13 | // in the Software without restriction, including without limitation the rights |
14 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
15 | // copies of the Software, and to permit persons to whom the Software is |
16 | // furnished to do so, subject to the following conditions: |
17 | // |
18 | // The above copyright notice and this permission notice shall be included in |
19 | // all copies or substantial portions of the Software. |
20 | // |
21 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
22 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
23 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
24 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
25 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
26 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
27 | // THE SOFTWARE. |
28 | // |
29 | |
30 | #ifndef APPLESEED_FOUNDATION_IMAGE_CANVASPROPERTIES_H |
31 | #define APPLESEED_FOUNDATION_IMAGE_CANVASPROPERTIES_H |
32 | |
33 | // appleseed.foundation headers. |
34 | #include "foundation/image/pixel.h" |
35 | #include "foundation/math/scalar.h" |
36 | |
37 | // appleseed.main headers. |
38 | #include "main/dllsymbol.h" |
39 | |
40 | // Standard headers. |
41 | #include <algorithm> |
42 | #include <cmath> |
43 | #include <cstddef> |
44 | |
45 | namespace foundation |
46 | { |
47 | |
48 | // |
49 | // Canvas properties. |
50 | // |
51 | |
52 | class APPLESEED_DLLSYMBOL CanvasProperties |
53 | { |
54 | public: |
55 | // Properties. |
56 | size_t m_canvas_width; // canvas width, in pixels |
57 | size_t m_canvas_height; // canvas height, in pixels |
58 | size_t m_tile_width; // tile width, in pixels |
59 | size_t m_tile_height; // tile height, in pixels |
60 | size_t m_channel_count; // number of channels per pixel |
61 | PixelFormat m_pixel_format; // pixel format |
62 | |
63 | // Precomputed values. |
64 | double m_rcp_canvas_width; // canvas width reciprocal |
65 | double m_rcp_canvas_height; // canvas height reciprocal |
66 | double m_rcp_tile_width; // tile width reciprocal |
67 | double m_rcp_tile_height; // tile height reciprocal |
68 | size_t m_tile_count_x; // number of tiles of a row in the canvas |
69 | size_t m_tile_count_y; // number of tiles of a column in the canvas |
70 | size_t m_tile_count; // total number of tiles in the canvas |
71 | size_t m_pixel_count; // total number of pixels in the canvas |
72 | size_t m_pixel_size; // size in bytes of one pixel |
73 | |
74 | // Constructors. |
75 | CanvasProperties(); |
76 | CanvasProperties( |
77 | const size_t canvas_width, |
78 | const size_t canvas_height, |
79 | const size_t tile_width, |
80 | const size_t tile_height, |
81 | const size_t channel_count, |
82 | const PixelFormat pixel_format); |
83 | |
84 | // Compute the width and height in pixels of a given tile. |
85 | size_t get_tile_width(const size_t tile_x) const; |
86 | size_t get_tile_height(const size_t tile_y) const; |
87 | }; |
88 | |
89 | |
90 | // |
91 | // CanvasProperties class implementation. |
92 | // |
93 | |
94 | |
95 | inline CanvasProperties::CanvasProperties() |
96 | { |
97 | } |
98 | |
99 | inline CanvasProperties::CanvasProperties( |
100 | const size_t canvas_width, |
101 | const size_t canvas_height, |
102 | const size_t tile_width, |
103 | const size_t tile_height, |
104 | const size_t channel_count, |
105 | const PixelFormat pixel_format) |
106 | : m_canvas_width(canvas_width) |
107 | , m_canvas_height(canvas_height) |
108 | , m_tile_width(tile_width) |
109 | , m_tile_height(tile_height) |
110 | , m_channel_count(channel_count) |
111 | , m_pixel_format(pixel_format) |
112 | { |
113 | m_rcp_canvas_width = 1.0 / m_canvas_width; |
114 | m_rcp_canvas_height = 1.0 / m_canvas_height; |
115 | |
116 | m_rcp_tile_width = 1.0 / m_tile_width; |
117 | m_rcp_tile_height = 1.0 / m_tile_height; |
118 | |
119 | const double nx = std::ceil(static_cast<double>(m_canvas_width) / m_tile_width); |
120 | const double ny = std::ceil(static_cast<double>(m_canvas_height) / m_tile_height); |
121 | |
122 | m_tile_count_x = truncate<size_t>(nx); |
123 | m_tile_count_y = truncate<size_t>(ny); |
124 | m_tile_count = m_tile_count_x * m_tile_count_y; |
125 | |
126 | m_pixel_count = m_canvas_width * m_canvas_height; |
127 | m_pixel_size = m_channel_count * Pixel::size(m_pixel_format); |
128 | } |
129 | |
130 | inline size_t CanvasProperties::get_tile_width(const size_t tile_x) const |
131 | { |
132 | return |
133 | std::min( |
134 | m_canvas_width - tile_x * m_tile_width, |
135 | m_tile_width); |
136 | } |
137 | |
138 | inline size_t CanvasProperties::get_tile_height(const size_t tile_y) const |
139 | { |
140 | return |
141 | std::min( |
142 | m_canvas_height - tile_y * m_tile_height, |
143 | m_tile_height); |
144 | } |
145 | |
146 | } // namespace foundation |
147 | |
148 | #endif // !APPLESEED_FOUNDATION_IMAGE_CANVASPROPERTIES_H |
149 | |