Mercurial > love-experiments
diff src/modules/image/CompressedData.cpp @ 1420:2a5ef265e040 image-CompressedData
Added support for DXT1/3/5 and BC5/7 compressed textures via love.image.CompressedData. Some internals are still iffy.
- added a new CompressedData type to love.image
- added love.image.isCompressed(file or data)
- love.graphics.newImage automatically tests for compression when loading a file
- added love.graphics.isSupported strings for DXT, BC5, and BC7
Compressed textures meant to be used on the GPU offer huge performance gains when
- loading the texture from a file
- loading the texture from RAM to VRAM
- loading mipmaps
- rendering
| author | Alex Szpakowski <slime73@gmail.com> |
|---|---|
| date | Thu, 04 Apr 2013 19:09:18 -0300 |
| parents | |
| children | aa603d1b03bc |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/modules/image/CompressedData.cpp Thu Apr 04 19:09:18 2013 -0300 @@ -0,0 +1,123 @@ +/** + * Copyright (c) 2006-2013 LOVE Development Team + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + **/ + +#include "CompressedData.h" + +namespace love +{ +namespace image +{ + +CompressedData::CompressedData() + : type(TYPE_MAX_ENUM) +{ + +} + +CompressedData::~CompressedData() +{ + +} + +int CompressedData::getSize() const +{ + size_t totalsize = sizeof(MipmapInfo) * dataMipmapInfo.size(); + + for (size_t i = 0; i < dataMipmapInfo.size(); i++) + totalsize += dataMipmapInfo[i].size; + + return totalsize; +} + +void *CompressedData::getData() const +{ + // ? + return (void *) &dataMipmapInfo[0].data[0]; +} + +int CompressedData::getNumMipmaps() const +{ + return dataMipmapInfo.size(); +} + +int CompressedData::getSize(int miplevel) const +{ + checkMipmapLevelExists(miplevel); + + return dataMipmapInfo[miplevel].size; +} + +void *CompressedData::getData(int miplevel) const +{ + checkMipmapLevelExists(miplevel); + + return (void *) &dataMipmapInfo[miplevel].data[0]; +} + +int CompressedData::getWidth(int miplevel) const +{ + checkMipmapLevelExists(miplevel); + + return dataMipmapInfo[miplevel].width; +} + +int CompressedData::getHeight(int miplevel) const +{ + checkMipmapLevelExists(miplevel); + + return dataMipmapInfo[miplevel].height; +} + +CompressedData::TextureType CompressedData::getType() const +{ + return type; +} + +void CompressedData::checkMipmapLevelExists(int miplevel) const +{ + if (miplevel < 0 || miplevel >= dataMipmapInfo.size()) + throw love::Exception("Mipmap level %d does not exist", miplevel); +} + +bool CompressedData::getConstant(const char *in, CompressedData::TextureType &out) +{ + return types.find(in, out); +} + +bool CompressedData::getConstant(CompressedData::TextureType in, const char *&out) +{ + return types.find(in, out); +} + +StringMap<CompressedData::TextureType, CompressedData::TYPE_MAX_ENUM>::Entry CompressedData::typeEntries[] = +{ + {"dxt1", CompressedData::TYPE_DXT1}, + {"dxt3", CompressedData::TYPE_DXT3}, + {"dxt5", CompressedData::TYPE_DXT5}, + {"bc5s", CompressedData::TYPE_BC5s}, + {"bc5u", CompressedData::TYPE_BC5u}, + {"bc7", CompressedData::TYPE_BC7}, + {"bc7srgb", CompressedData::TYPE_BC7srgb}, +}; + +StringMap<CompressedData::TextureType, CompressedData::TYPE_MAX_ENUM> CompressedData::types(CompressedData::typeEntries, sizeof(CompressedData::typeEntries)); + +} // image +} // love
