/src/FreeImage/Source/OpenEXR/IlmImf/ImfPreviewImage.h
C++ Header | 131 lines | 39 code | 28 blank | 64 comment | 0 complexity | 5f6fef488ff55aee5122c36b8f7d5d65 MD5 | raw file
1/////////////////////////////////////////////////////////////////////////// 2// 3// Copyright (c) 2003, Industrial Light & Magic, a division of Lucas 4// Digital Ltd. LLC 5// 6// All rights reserved. 7// 8// Redistribution and use in source and binary forms, with or without 9// modification, are permitted provided that the following conditions are 10// met: 11// * Redistributions of source code must retain the above copyright 12// notice, this list of conditions and the following disclaimer. 13// * Redistributions in binary form must reproduce the above 14// copyright notice, this list of conditions and the following disclaimer 15// in the documentation and/or other materials provided with the 16// distribution. 17// * Neither the name of Industrial Light & Magic nor the names of 18// its contributors may be used to endorse or promote products derived 19// from this software without specific prior written permission. 20// 21// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32// 33/////////////////////////////////////////////////////////////////////////// 34 35 36#ifndef INCLUDED_IMF_PREVIEW_IMAGE_H 37#define INCLUDED_IMF_PREVIEW_IMAGE_H 38 39//----------------------------------------------------------------------------- 40// 41// class PreviewImage -- a usually small, low-dynamic range image, 42// that is intended to be stored in an image file's header. 43// 44// struct PreviewRgba -- holds the value of a PreviewImage pixel. 45// 46//----------------------------------------------------------------------------- 47 48namespace Imf { 49 50 51struct PreviewRgba 52{ 53 unsigned char r; // Red, green and blue components of 54 unsigned char g; // the pixel's color; intensity is 55 unsigned char b; // proportional to pow (x/255, 2.2), 56 // where x is r, g, or b. 57 58 unsigned char a; // The pixel's alpha; 0 == transparent, 59 // 255 == opaque. 60 61 PreviewRgba (unsigned char r = 0, 62 unsigned char g = 0, 63 unsigned char b = 0, 64 unsigned char a = 255) 65 : r(r), g(g), b(b), a(a) {} 66}; 67 68 69class PreviewImage 70{ 71 public: 72 73 //-------------------------------------------------------------------- 74 // Constructor: 75 // 76 // PreviewImage(w,h,p) constructs a preview image with w by h pixels 77 // whose initial values are specified in pixel array p. The x and y 78 // coordinates of the pixels in p go from 0 to w-1, and from 0 to h-1. 79 // The pixel with coordinates (x, y) is at address p + y*w + x. 80 // Pixel (0, 0) is in the upper left corner of the preview image. 81 // If p is zero, the pixels in the preview image are initialized with 82 // (r = 0, b = 0, g = 0, a = 255). 83 // 84 //-------------------------------------------------------------------- 85 86 PreviewImage (unsigned int width = 0, 87 unsigned int height = 0, 88 const PreviewRgba pixels[] = 0); 89 90 //----------------------------------------------------- 91 // Copy constructor, destructor and assignment operator 92 //----------------------------------------------------- 93 94 PreviewImage (const PreviewImage &other); 95 ~PreviewImage (); 96 97 PreviewImage & operator = (const PreviewImage &other); 98 99 100 //----------------------------------------------- 101 // Access to width, height and to the pixel array 102 //----------------------------------------------- 103 104 unsigned int width () const {return _width;} 105 unsigned int height () const {return _height;} 106 107 PreviewRgba * pixels () {return _pixels;} 108 const PreviewRgba * pixels () const {return _pixels;} 109 110 111 //---------------------------- 112 // Access to individual pixels 113 //---------------------------- 114 115 PreviewRgba & pixel (unsigned int x, unsigned int y) 116 {return _pixels[y * _width + x];} 117 118 const PreviewRgba & pixel (unsigned int x, unsigned int y) const 119 {return _pixels[y * _width + x];} 120 121 private: 122 123 unsigned int _width; 124 unsigned int _height; 125 PreviewRgba * _pixels; 126}; 127 128 129} // namespace Imf 130 131#endif