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56b5a7eeca
One problem is, that tolua/lua does not handle plain data pointers
properly. Therefore something like
local surface = cairo_image_surface_create_for_data(
imlib_image_get_data_for_reading_only(), ..
will fail using the lua bindings. Hence this wrapper, which adds
a function which be used to draw an imlib image to a cairo surface.
This also addresses another issue, drawing images with a transparent
background (e.g. gifs or pngs) to the cairo surface properly. Apparently
the image format of imlib is incompatible to cairos which uses
pre-multiplied data. This is also explained in the cairo documentation.
A fix for this issue is to blend the image with another alpha mask to
get the correct values. The code and explanation for this was taken from
http://lists.cairographics.org/archives/cairo/2008-March/013492.html
Executive Summary: This wrapper function can load (transparent) images
(e.g. gif or png) from a file by using imlib and draw them on a cairo
surface.
82 lines
2.9 KiB
CMake
82 lines
2.9 KiB
CMake
# vim: ts=4 sw=4 noet ai cindent syntax=cmake
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#
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# Conky, a system monitor, based on torsmo
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#
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# Please see COPYING for details
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#
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# Copyright (c) 2005-2012 Brenden Matthews, et. al. (see AUTHORS)
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# All rights reserved.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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include(ToLua)
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add_definitions(-DTOLUA_RELEASE)
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set(CMAKE_C_FLAGS "-O3")
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set(CMAKE_C_FLAGS_DEBUG "-ggdb")
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set(CMAKE_CXX_FLAGS "-O3")
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set(CMAKE_CXX_FLAGS_DEBUG "-ggdb")
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if(BUILD_LUA_CAIRO)
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include_directories(${luacairo_includes} ${CMAKE_CURRENT_SOURCE_DIR})
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# cairo_set_dash() needs this special hack to work properly
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# if you have a better solution, please let me know
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wrap_tolua(luacairo_src cairo.pkg libcairo.patch)
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add_library(conky-cairo SHARED ${luacairo_src})
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set_target_properties(conky-cairo PROPERTIES OUTPUT_NAME "cairo")
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target_link_libraries(conky-cairo ${luacairo_libs} ${TOLUA_LIBS})
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set(lua_libs ${lua_libs} conky-cairo)
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endif(BUILD_LUA_CAIRO)
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if(BUILD_LUA_IMLIB2)
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include_directories(${luaimlib2_includes} ${CMAKE_CURRENT_SOURCE_DIR})
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wrap_tolua(luaimlib2_src imlib2.pkg)
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add_library(conky-imlib2 SHARED ${luaimlib2_src})
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set_target_properties(conky-imlib2 PROPERTIES OUTPUT_NAME "imlib2")
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target_link_libraries(conky-imlib2 ${luaimlib2_libs} ${TOLUA_LIBS})
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set(lua_libs ${lua_libs} conky-imlib2)
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endif(BUILD_LUA_IMLIB2)
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if(BUILD_LUA_RSVG)
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include_directories(${luarsvg_includes} ${CMAKE_CURRENT_SOURCE_DIR})
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wrap_tolua(luarsvg_src rsvg.pkg)
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add_library(conky-rsvg SHARED ${luarsvg_src})
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set_target_properties(conky-rsvg PROPERTIES OUTPUT_NAME "rsvg")
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target_link_libraries(conky-rsvg ${luarsvg_libs} ${TOLUA_LIBS})
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set(lua_libs ${lua_libs} conky-rsvg)
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endif(BUILD_LUA_RSVG)
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if(BUILD_LUA_CAIRO AND BUILD_LUA_IMLIB2)
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include_directories(${luacairo_includes} ${luaimlib2_includes} ${CMAKE_CURRENT_SOURCE_DIR})
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wrap_tolua(luacairo_imlib2_helper_src cairo_imlib2_helper.pkg)
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add_library(conky-cairo_imlib2_helper SHARED ${luacairo_imlib2_helper_src})
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set_target_properties(conky-cairo_imlib2_helper PROPERTIES OUTPUT_NAME "cairo_imlib2_helper")
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target_link_libraries(conky-cairo_imlib2_helper ${luacairo_libs} ${luaimlib2_libs} ${TOLUA_LIBS})
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set(lua_libs ${lua_libs} conky-cairo_imlib2_helper)
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endif(BUILD_LUA_CAIRO AND BUILD_LUA_IMLIB2)
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install(TARGETS
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${lua_libs}
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LIBRARY DESTINATION lib/conky
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ARCHIVE DESTINATION lib/conky
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)
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