Use Qt's Resource System (2nd approach) (#1891)

* Remove bin2res, use Qt's resource system
* Use QDir search paths and QImageReader in getIconPixmap
* Don't include "embed.cpp" in plugins
* getIconPixmap: Use QPixmapCache, use QPixmap::fromImageReader
* Require CMake 2.8.9

* Fix ReverbSC embed usage

cmake/modules/BuildPlugin.cmake

@@ -3,6 +3,8 @@
 # description: build LMMS-plugin
 # usage: BUILD_PLUGIN(<PLUGIN_NAME> <PLUGIN_SOURCES> MOCFILES <HEADERS_FOR_MOC> EMBEDDED_RESOURCES <LIST_OF_FILES_TO_EMBED> UICFILES <UI_FILES_TO_COMPILE> LINK <SHARED|MODULE>)
 
+INCLUDE(GenQrc)
+
 MACRO(BUILD_PLUGIN PLUGIN_NAME)
 	CMAKE_PARSE_ARGUMENTS(PLUGIN "" "" "MOCFILES;EMBEDDED_RESOURCES;UICFILES;LINK" ${ARGN})
 	SET(PLUGIN_SOURCES ${PLUGIN_UNPARSED_ARGUMENTS})
@@ -25,11 +27,7 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 		ENDFOREACH()
 		SET(PLUGIN_EMBEDDED_RESOURCES ${NEW_ARGS})
 
-		SET(ER_H ${CMAKE_CURRENT_BINARY_DIR}/embedded_resources.h)
-		ADD_CUSTOM_COMMAND(OUTPUT ${ER_H}
-			COMMAND ${BIN2RES}
-			ARGS ${PLUGIN_EMBEDDED_RESOURCES} > ${ER_H}
-			DEPENDS bin2res)
+		ADD_GEN_QRC(RCC_OUT "${PLUGIN_NAME}.qrc" PREFIX artwork/${PLUGIN_NAME} ${PLUGIN_EMBEDDED_RESOURCES})
 	ENDIF(ER_LEN)
 
 	IF(QT5)
@@ -41,7 +39,7 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 	ENDIF()
 
 	FOREACH(f ${PLUGIN_SOURCES})
-		ADD_FILE_DEPENDENCIES(${f} ${ER_H} ${plugin_UIC_out})
+		ADD_FILE_DEPENDENCIES(${f} ${RCC_OUT} ${plugin_UIC_out})
 	ENDFOREACH(f)
 
 	IF(LMMS_BUILD_APPLE)
@@ -58,11 +56,11 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 	ENDIF()
 
 	IF ("${PLUGIN_LINK}" STREQUAL "SHARED")
-	  ADD_LIBRARY(${PLUGIN_NAME} SHARED ${PLUGIN_SOURCES} ${plugin_MOC_out})
+	  ADD_LIBRARY(${PLUGIN_NAME} SHARED ${PLUGIN_SOURCES} ${plugin_MOC_out} ${RCC_OUT})
 	ELSE ()
-	  ADD_LIBRARY(${PLUGIN_NAME} MODULE ${PLUGIN_SOURCES} ${plugin_MOC_out})
+	  ADD_LIBRARY(${PLUGIN_NAME} MODULE ${PLUGIN_SOURCES} ${plugin_MOC_out} ${RCC_OUT})
 	ENDIF ()
-	
+
 	IF(QT5)
 		TARGET_LINK_LIBRARIES(${PLUGIN_NAME} Qt5::Widgets Qt5::Xml)
 	ENDIF()
@@ -81,6 +79,6 @@ MACRO(BUILD_PLUGIN PLUGIN_NAME)
 		ADD_CUSTOM_COMMAND(TARGET ${PLUGIN_NAME} POST_BUILD COMMAND ${STRIP} $<TARGET_FILE:${PLUGIN_NAME}>)
 	ENDIF(LMMS_BUILD_WIN32)
 
-	SET_DIRECTORY_PROPERTIES(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${ER_H} ${plugin_MOC_out}")
+	SET_DIRECTORY_PROPERTIES(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${RCC_OUT} ${plugin_MOC_out}")
 ENDMACRO(BUILD_PLUGIN)
 

cmake/modules/GenQrc.cmake

@@ -0,0 +1,57 @@
+# GenQrc.cmake - Copyright (c) 2015 Lukas W <lukaswhl/at/gmail.com>
+
+# Generates a simple qrc file containing the given resource files ${ARGN}:
+#     GEN_QRC(resources.qrc artwork.png icon.png PREFIX /icons)
+# Files may also be added using a pattern with the GLOB keyword, e.g.:
+#     GEN_QRC(resources.qrc GLOB *.png)
+FUNCTION(GEN_QRC OUT_FILE)
+	CMAKE_PARSE_ARGUMENTS(RC "" "PREFIX;GLOB" "" ${ARGN})
+
+	IF(DEFINED RC_GLOB)
+		FILE(GLOB GLOB_FILES ${RC_GLOB})
+	ENDIF()
+
+	# Set the standard prefix to "/" if none is given
+	IF(NOT DEFINED RC_PREFIX)
+		SET(RC_PREFIX "/")
+	ENDIF()
+
+	# We need to convert our list to a string in order to pass it to the script
+	# on the command line.
+	STRING(REPLACE ";" "\;" FILES "${RC_UNPARSED_ARGUMENTS};${GLOB_FILES}")
+
+	SET(GENQRC_SCRIPT "${CMAKE_SOURCE_DIR}/cmake/scripts/GenQrc.cmake")
+	ADD_CUSTOM_COMMAND(
+		OUTPUT ${OUT_FILE}
+		COMMAND ${CMAKE_COMMAND} -D OUT_FILE=${OUT_FILE} -D RC_PREFIX=${RC_PREFIX} -D FILES:list=${FILES} -D DIR=${CMAKE_CURRENT_SOURCE_DIR} -P "${GENQRC_SCRIPT}"
+		DEPENDS ${GENQRC_SCRIPT}
+		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+		VERBATIM
+	)
+ENDFUNCTION()
+
+# Generates a qrc file named ${QRC_OUT} from ${ARGN}, rccs it and returns Qt's
+# output file.
+# Must only be run once per CMakeLists.txt.
+# Usage example:
+#     ADD_GEN_QRC(RCC_OUTPUT resources.qrc icon.png manual.pdf)
+#     ADD_EXECUTABLE(myexe main.cpp ${RCC_OUTPUT})
+MACRO(ADD_GEN_QRC RCCOUT QRC_OUT)
+	IF(NOT IS_ABSOLUTE ${QRC_OUT})
+		SET(QRC_FILE "${CMAKE_CURRENT_BINARY_DIR}/${QRC_OUT}")
+	ELSE()
+		SET(QRC_FILE ${QRC_OUT})
+	ENDIF()
+
+	GEN_QRC(${QRC_FILE} "${ARGN}")
+	QT_ADD_RESOURCES(${RCCOUT} ${QRC_FILE})
+ENDMACRO()
+
+
+MACRO(QT_ADD_RESOURCES)
+	IF(QT5)
+		QT5_ADD_RESOURCES(${ARGN})
+	ELSE()
+		QT4_ADD_RESOURCES(${ARGN})
+	ENDIF()
+ENDMACRO()

cmake/scripts/GenQrc.cmake

@@ -0,0 +1,26 @@
+# GenQrcScript.cmake - Copyright (c) 2015 Lukas W <lukaswhl/at/gmail.com>
+
+INCLUDE(CMakeParseArguments)
+
+FILE(REMOVE ${OUT_FILE})
+MACRO(OUT STRING)
+	FILE(APPEND ${OUT_FILE} "${STRING}\n")
+ENDMACRO()
+
+IF(NOT DEFINED RC_PREFIX)
+	SET(RC_PREFIX "/")
+ENDIF()
+
+# Write qrc file
+OUT("<RCC>")
+OUT("	<qresource prefix=\"${RC_PREFIX}\">")
+FOREACH(VAR ${FILES})
+	GET_FILENAME_COMPONENT(FILENAME ${VAR} NAME)
+	IF(IS_ABSOLUTE ${VAR})
+		OUT("		<file alias=\"${FILENAME}\">${VAR}</file>")
+	ELSE()
+		OUT("		<file alias=\"${FILENAME}\">${DIR}/${VAR}</file>")
+	ENDIF()
+ENDFOREACH()
+OUT("	</qresource>")
+OUT("</RCC>")