#
# Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
#
# This code is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
# You should have received a copy of the GNU General Public License version
# 2 along with this work; if not, write to the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
# or visit www.oracle.com if you need additional information or have any
# questions.
#

# This file is responsible for extracting the x11 native struct offsets to
# the xawt Java library. The tool needs to be run on the os/arch that
# will host the final jvm, thus the tool cannot be used when cross compiling.

# To enable cross compiling, the two versions of the generated offset file,
# sizes.32 and sizes.64 are committed into the source code repository.
# These are the ones used.

# However when not cross compiling, the offset generator tool is built and
# run, to verify that it still generates the same sizes.32 and sizes.64.

GENSRC_X11WRAPPERS :=
# Put temporary c-code and executable to calculate offsets here.
# Also put verification offset file here as well.
GENSRC_X11WRAPPERS_TMP := $(SUPPORT_OUTPUTDIR)/gensrc/java.desktop/_x11wrappers
# Put the generated Java classes used to interface X11 from awt here.
GENSRC_X11WRAPPERS_DST := $(SUPPORT_OUTPUTDIR)/gensrc/java.desktop/sun/awt/X11

# The pre-calculated offset file are stored here:
GENSRC_SIZER_DIR := $(TOPDIR)/make/data/x11wrappergen

# Normal case is to generate only according to target bits
GENSRC_X11_VERSION := $(OPENJDK_TARGET_CPU_BITS)
ifeq ($(OPENJDK_TARGET_CPU_BITS), 64)
  ifneq ($(OPENJDK_TARGET_OS), linux)
    # On all 64-bit systems except Linux, generate both 32 and 64 bit versions
    GENSRC_X11_VERSION := 32 64
  endif
else
  ifeq ($(OPENJDK_TARGET_OS), solaris)
    # As a special case, solaris 32-bit also generates the 64-bit version
    GENSRC_X11_VERSION := 32 64
  endif
endif

GENSRC_X11_SIZES_USED := $(addprefix $(GENSRC_X11WRAPPERS_TMP)/sizes., $(GENSRC_X11_VERSION))

# Copy only the sizes.* files that are actually needed. WrapperGenerator picks up any it finds from the
# file prefix it is given so those not needed need to be hidden.
$(GENSRC_X11WRAPPERS_TMP)/sizes.%: $(GENSRC_SIZER_DIR)/sizes.%
	$(call MakeDir, $(@D))
	$(RM) '$@'
	$(SORT) $< > $@

# Run the tool on the offset files copied from the source repository to generate several Java classes
# used in awt.
$(SUPPORT_OUTPUTDIR)/gensrc/java.desktop/_the.generated.x11: $(GENSRC_X11_SIZES_USED) $(BUILD_TOOLS_JDK)
	$(call MakeDir, $(GENSRC_X11WRAPPERS_DST))
	$(TOOL_WRAPPERGENERATOR) $(GENSRC_X11WRAPPERS_DST) $(GENSRC_SIZER_DIR)/xlibtypes.txt "gen" $(GENSRC_X11WRAPPERS_TMP)/sizes
	$(TOUCH) $@

GENSRC_X11WRAPPERS += $(SUPPORT_OUTPUTDIR)/gensrc/java.desktop/_the.generated.x11

ifneq ($(COMPILE_TYPE), cross)
  # This is not a cross compile, regenerate the offset file, so that we
  # can compare it with the version in the source code repository.

  # Generate the C code for the program that will output the offset file.
  $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c: $(GENSRC_SIZER_DIR)/xlibtypes.txt $(BUILD_TOOLS_JDK)
	$(call LogInfo, Generating X11 wrapper ($*-bit version))
	$(call MakeDir, $(@D))
	$(TOOL_WRAPPERGENERATOR) $(@D) $(GENSRC_SIZER_DIR)/xlibtypes.txt "sizer" $*

  # use -m32/-m64 only if the compiler supports it
  ifeq ($(COMPILER_SUPPORTS_TARGET_BITS_FLAG), true)
    MEMORY_MODEL_FLAG="$(COMPILER_TARGET_BITS_FLAG)$*"
  endif

  SIZER_CFLAGS := \
      -I$(TOPDIR)/src/java.base/share/native/include \
      -I$(TOPDIR)/src/java.base/$(OPENJDK_TARGET_OS_EXPORT_DIR)/native/include \
      -I$(TOPDIR)/src/java.base/share/native/libjava \
      -I$(TOPDIR)/src/java.base/$(OPENJDK_TARGET_OS_TYPE)/native/libjava \
      -I$(TOPDIR)/src/java.desktop/$(OPENJDK_TARGET_OS_TYPE)/native/common/awt \
      -I$(TOPDIR)/src/java.desktop/share/native/common/awt/debug \
      -I$(TOPDIR)/src/java.desktop/share/native/libawt/awt/image/cvutils \
      #

  # Compile the C code into an executable.
  $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe: $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c
	$(call MakeDir, $(@D))
	(cd $(@D) && $(CC) $(MEMORY_MODEL_FLAG) -o $@ $< \
	    $(X_CFLAGS) \
	    $(X_LIBS) \
	    $(SIZER_CFLAGS) -lc)

  .PRECIOUS: $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c

  # Run the executable create the offset file and check that it is identical
  # to the offset file in the source code repository.
  $(GENSRC_X11WRAPPERS_TMP)/sizes.%.verification: $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe
	$(call LogInfo, Verifying X11 wrapper sizes)
	$(call MakeDir, $(@D))
	$(GENSRC_X11WRAPPERS_TMP)/sizer.$*.exe | $(SORT) > $@.tmp
	$(DIFF) $(GENSRC_X11WRAPPERS_TMP)/sizes.$*.verification.tmp $(GENSRC_X11WRAPPERS_TMP)/sizes.$*
	mv $@.tmp $@

  GENSRC_X11WRAPPERS += $(GENSRC_X11WRAPPERS_TMP)/sizes.$(OPENJDK_TARGET_CPU_BITS).verification
endif

GENSRC_JAVA_DESKTOP += $(GENSRC_X11WRAPPERS)