101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
/* This file is part of the Pangolin Project.
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* http://github.com/stevenlovegrove/Pangolin
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*
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* Copyright (c) 2011 Steven Lovegrove
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <pangolin/image/image.h>
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#include <pangolin/image/pixel_format.h>
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namespace pangolin {
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class PANGOLIN_EXPORT StreamInfo
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{
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public:
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inline StreamInfo()
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: fmt(PixelFormatFromString("GRAY8")) {}
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inline StreamInfo(PixelFormat fmt, const Image<unsigned char> img_offset )
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: fmt(fmt), img_offset(img_offset) {}
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inline StreamInfo(PixelFormat fmt, size_t w, size_t h, size_t pitch, unsigned char* offset = 0)
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: fmt(fmt), img_offset(offset,w,h,pitch) {}
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//! Format representing how image is laid out in memory
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inline const PixelFormat &PixFormat() const { return fmt; }
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//! Image width in pixels
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inline size_t Width() const { return img_offset.w; }
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//! Image height in pixels
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inline size_t Height() const { return img_offset.h; }
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inline double Aspect() const { return (double)Width() / (double)Height(); }
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//! Pitch: Number of bytes between one image row and the next
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inline size_t Pitch() const { return img_offset.pitch; }
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//! Number of contiguous bytes in memory that the image occupies
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inline size_t RowBytes() const {
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// Row size without padding
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return (fmt.bpp*img_offset.w)/8;
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}
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//! Returns true iff image contains padding or stridded access
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//! This implies that the image data is not contiguous in memory.
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inline bool IsPitched() const {
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return Pitch() != RowBytes();
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}
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//! Number of contiguous bytes in memory that the image occupies
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inline size_t SizeBytes() const {
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return (img_offset.h-1) * img_offset.pitch + RowBytes();
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}
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//! Offset in bytes relative to start of frame buffer
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inline unsigned char* Offset() const { return img_offset.ptr; }
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//! Return Image wrapper around raw base pointer
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inline Image<unsigned char> StreamImage(unsigned char* base_ptr) const {
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Image<unsigned char> img = img_offset;
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img.ptr += (size_t)base_ptr;
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return img;
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}
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//! Return Image wrapper around raw base pointer
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inline const Image<unsigned char> StreamImage(const unsigned char* base_ptr) const {
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Image<unsigned char> img = img_offset;
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img.ptr += (size_t)base_ptr;
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return img;
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}
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protected:
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PixelFormat fmt;
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Image<unsigned char> img_offset;
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};
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}
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