Mercurial > love-experiments
diff src/modules/image/wrap_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 | 5b9ebe6a9a7e |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/modules/image/wrap_CompressedData.cpp Thu Apr 04 19:09:18 2013 -0300 @@ -0,0 +1,129 @@ +/** + * 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 "wrap_CompressedData.h" +#include "common/wrap_Data.h" + +namespace love +{ +namespace image +{ + +CompressedData *luax_checkcompresseddata(lua_State *L, int idx) +{ + return luax_checktype<CompressedData>(L, idx, "CompressedData", IMAGE_COMPRESSED_DATA_T); +} + +int w_CompressedData_getWidth(lua_State *L) +{ + CompressedData *t = luax_checkcompresseddata(L, 1); + int miplevel = luaL_optinteger(L, 2, 1); + int width = 0; + try + { + width = t->getWidth(miplevel >= 1 ? miplevel - 1 : 0); + } + catch (love::Exception &e) + { + return luaL_error(L, "%s", e.what()); + } + lua_pushinteger(L, width); + return 1; +} + +int w_CompressedData_getHeight(lua_State *L) +{ + CompressedData *t = luax_checkcompresseddata(L, 1); + int miplevel = luaL_optinteger(L, 2, 1); + int height = 0; + try + { + height = t->getHeight(miplevel >= 1 ? miplevel - 1 : 0); + } + catch (love::Exception &e) + { + return luaL_error(L, "%s", e.what()); + } + lua_pushinteger(L, height); + return 1; +} + +int w_CompressedData_getDimensions(lua_State *L) +{ + CompressedData *t = luax_checkcompresseddata(L, 1); + int miplevel = luaL_optinteger(L, 2, 1); + int width = 0, height = 0; + try + { + width = t->getWidth(miplevel >= 1 ? miplevel - 1 : 0); + height = t->getHeight(miplevel >= 1 ? miplevel - 1 : 0); + } + catch (love::Exception &e) + { + return luaL_error(L, "%s", e.what()); + } + lua_pushinteger(L, width); + lua_pushinteger(L, height); + return 2; +} + +int w_CompressedData_getNumMipmaps(lua_State *L) +{ + CompressedData *t = luax_checkcompresseddata(L, 1); + lua_pushinteger(L, t->getNumMipmaps()); + return 1; +} + +int w_CompressedData_getType(lua_State *L) +{ + CompressedData *t = luax_checkcompresseddata(L, 1); + + image::CompressedData::TextureType type = t->getType(); + const char *str; + + if (image::CompressedData::getConstant(type, str)) + lua_pushstring(L, str); + else + lua_pushstring(L, "unknown"); + + return 1; +} + +static const luaL_Reg functions[] = +{ + // Data + { "getPointer", w_Data_getPointer }, + { "getSize", w_Data_getSize }, + + { "getWidth", w_CompressedData_getWidth }, + { "getHeight", w_CompressedData_getHeight }, + { "getDimensions", w_CompressedData_getDimensions }, + { "getNumMipmaps", w_CompressedData_getNumMipmaps }, + { "getType", w_CompressedData_getType }, + { 0, 0 }, +}; + +extern "C" int luaopen_compresseddata(lua_State *L) +{ + return luax_register_type(L, "CompressedData", functions); +} + +} // image +} // love
