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234 lines
7.0 KiB
C++
234 lines
7.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////////////////////
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// OpenGL Image Copyright (c) 2008 - 2011 G-Truc Creation (www.g-truc.net)
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Created : 2008-12-19
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// Updated : 2010-09-08
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// Licence : This source is under MIT License
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// File : gli/core/operation.inl
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///////////////////////////////////////////////////////////////////////////////////////////////////
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#include <cstring>
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namespace gli
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{
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namespace detail
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{
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inline image2D duplicate(image2D const & Mipmap2D)
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{
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image2D Result(Mipmap2D.dimensions(), Mipmap2D.format());
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memcpy(Result.data(), Mipmap2D.data(), Mipmap2D.capacity());
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return Result;
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}
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inline image2D flip(image2D const & Mipmap2D)
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{
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image2D Result(Mipmap2D.dimensions(), Mipmap2D.format());
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std::size_t ValueSize = Result.value_size();
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glm::byte * DstPtr = Result.data();
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glm::byte const * const SrcPtr = Mipmap2D.data();
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for(std::size_t j = 0; j < Result.dimensions().y; ++j)
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for(std::size_t i = 0; i < Result.dimensions().x; ++i)
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{
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std::size_t DstIndex = (i + j * Result.dimensions().y) * ValueSize;
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std::size_t SrcIndex = (i + (Result.dimensions().y - j) * Result.dimensions().x) * ValueSize;
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memcpy(DstPtr + DstIndex, SrcPtr + SrcIndex, ValueSize);
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}
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return Result;
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}
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inline image2D mirror(image2D const & Mipmap2D)
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{
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image2D Result(Mipmap2D.dimensions(), Mipmap2D.format());
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std::size_t ValueSize = Mipmap2D.value_size();
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glm::byte * DstPtr = Result.data();
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glm::byte const * const SrcPtr = Mipmap2D.data();
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for(std::size_t j = 0; j < Result.dimensions().y; ++j)
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for(std::size_t i = 0; i < Result.dimensions().x; ++i)
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{
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std::size_t DstIndex = (i + j * Result.dimensions().x) * ValueSize;
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std::size_t SrcIndex = ((Result.dimensions().x - i) + j * Result.dimensions().x) * ValueSize;
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memcpy(DstPtr + DstIndex, SrcPtr + SrcIndex, ValueSize);
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}
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return Result;
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}
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inline image2D swizzle
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(
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image2D const & Mipmap,
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glm::uvec4 const & Channel
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)
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{
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image2D Result = detail::duplicate(Mipmap);
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glm::byte * DataDst = Result.data();
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glm::byte const * const DataSrc = Mipmap.data();
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gli::texture2D::size_type CompSize = Mipmap.value_size() / Mipmap.components();
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gli::texture2D::size_type TexelCount = Mipmap.capacity() / Mipmap.value_size();
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for(gli::texture2D::size_type t = 0; t < TexelCount; ++t)
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for(gli::texture2D::size_type c = 0; c < Mipmap.components(); ++c)
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{
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gli::texture2D::size_type IndexSrc = t * Mipmap.components() + Channel[glm::uvec4::size_type(c)];
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gli::texture2D::size_type IndexDst = t * Mipmap.components() + c;
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memcpy(DataDst + IndexDst, DataSrc + IndexSrc, CompSize);
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}
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return Result;
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}
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inline image2D crop
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(
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image2D const & Image,
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image2D::dimensions_type const & Position,
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image2D::dimensions_type const & Size
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)
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{
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assert((Position.x + Size.x) <= Image.dimensions().x && (Position.y + Size.y) <= Image.dimensions().y);
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image2D Result(Size, Image.format());
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glm::byte* DstData = Result.data();
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glm::byte const * const SrcData = Image.data();
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for(std::size_t j = 0; j < Size.y; ++j)
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{
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std::size_t DstIndex = 0 + (0 + j) * Size.x * Image.value_size();
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std::size_t SrcIndex = Position.x * Image.value_size() + (Position.y + j) * Image.dimensions().x * Image.value_size();
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memcpy(DstData + DstIndex, SrcData + SrcIndex, Image.value_size() * Size.x);
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}
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return Result;
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}
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inline image2D copy
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(
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image2D const & SrcMipmap,
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image2D::dimensions_type const & SrcPosition,
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image2D::dimensions_type const & SrcSize,
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image2D & DstMipmap,
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image2D::dimensions_type const & DstPosition
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)
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{
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assert((SrcPosition.x + SrcSize.x) <= SrcMipmap.dimensions().x && (SrcPosition.y + SrcSize.y) <= SrcMipmap.dimensions().y);
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assert(SrcMipmap.format() == DstMipmap.format());
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glm::byte * DstData = DstMipmap.data();
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glm::byte const * const SrcData = SrcMipmap.data();
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std::size_t SizeX = glm::min(std::size_t(SrcSize.x + SrcPosition.x), std::size_t(DstMipmap.dimensions().x + DstPosition.x));
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std::size_t SizeY = glm::min(std::size_t(SrcSize.y + SrcPosition.y), std::size_t(DstMipmap.dimensions().y + DstPosition.y));
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for(std::size_t j = 0; j < SizeY; ++j)
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{
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std::size_t DstIndex = DstPosition.x * DstMipmap.value_size() + (DstPosition.y + j) * DstMipmap.dimensions().x * DstMipmap.value_size();
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std::size_t SrcIndex = SrcPosition.x * SrcMipmap.value_size() + (SrcPosition.y + j) * SrcMipmap.dimensions().x * SrcMipmap.value_size();
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memcpy(DstData + DstIndex, SrcData + SrcIndex, SrcMipmap.value_size() * SizeX);
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}
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return DstMipmap;
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}
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}//namespace detail
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inline texture2D duplicate(texture2D const & Texture2D)
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{
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texture2D Result(Texture2D.levels());
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for(texture2D::level_type Level = 0; Level < Texture2D.levels(); ++Level)
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Result[Level] = detail::duplicate(Texture2D[Level]);
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return Result;
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}
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inline texture2D flip(texture2D const & Texture2D)
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{
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texture2D Result(Texture2D.levels());
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for(texture2D::level_type Level = 0; Level < Texture2D.levels(); ++Level)
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Result[Level] = detail::flip(Texture2D[Level]);
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return Result;
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}
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inline texture2D mirror(texture2D const & Texture2D)
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{
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texture2D Result(Texture2D.levels());
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for(texture2D::level_type Level = 0; Level < Texture2D.levels(); ++Level)
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Result[Level] = detail::mirror(Texture2D[Level]);
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return Result;
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}
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inline texture2D crop
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(
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texture2D const & Texture2D,
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texture2D::dimensions_type const & Position,
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texture2D::dimensions_type const & Size
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)
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{
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texture2D Result(Texture2D.levels());
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for(texture2D::level_type Level = 0; Level < Texture2D.levels(); ++Level)
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Result[Level] = detail::crop(
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Texture2D[Level],
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Position >> texture2D::dimensions_type(Level),
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Size >> texture2D::dimensions_type(Level));
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return Result;
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}
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inline texture2D swizzle
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(
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texture2D const & Texture2D,
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glm::uvec4 const & Channel
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)
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{
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texture2D Result(Texture2D.levels());
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for(texture2D::level_type Level = 0; Level < Texture2D.levels(); ++Level)
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Result[Level] = detail::swizzle(Texture2D[Level], Channel);
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return Result;
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}
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inline texture2D copy
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(
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texture2D const & SrcImage,
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texture2D::level_type const & SrcLevel,
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texture2D::dimensions_type const & SrcPosition,
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texture2D::dimensions_type const & SrcDimensions,
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texture2D & DstMipmap,
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texture2D::level_type const & DstLevel,
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texture2D::dimensions_type const & DstDimensions
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)
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{
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detail::copy(
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SrcImage[SrcLevel],
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SrcPosition,
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SrcDimensions,
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DstMipmap[DstLevel],
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DstDimensions);
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return DstMipmap;
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}
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//inline image operator+(image const & MipmapA, image const & MipmapB)
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//{
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//
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//}
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//inline image operator-(image const & MipmapA, image const & MipmapB)
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//{
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//
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//}
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//inline image operator*(image const & MipmapA, image const & MipmapB)
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//{
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//
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//}
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//inline image operator/(image const & MipmapA, image const & MipmapB)
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//{
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//
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//}
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}//namespace gli
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