SUMMARY="Multi-platform GL implementation"
DESCRIPTION="Mesa is an open-source implementation of the OpenGL \
specification. The OpenGL specification documents a system for rendering \
interactive 3D graphics. Mesa fills the role of the Haiku OpenGL kit \
providing 3D rendering to Haiku applications."
HOMEPAGE="http://www.mesa3d.org/"
COPYRIGHT="1999-2017 Brian Paul"
LICENSE="MIT"
REVISION="3"
SOURCE_URI="https://mesa.freedesktop.org/archive/mesa-${portVersion}.tar.xz"
CHECKSUM_SHA256="89ecf3bcd0f18dcca5aaa42bf36bb52a2df33be89889f94aaaad91f7a504a69d"

ARCHITECTURES="!x86_gcc2 x86 x86_64 ?arm ?ppc"
SECONDARY_ARCHITECTURES="x86"

PROVIDES="
	mesa$secondaryArchSuffix = $portVersion
	lib:libGL$secondaryArchSuffix
	lib:libEGL$secondaryArchSuffix
	"
REQUIRES="
	haiku$secondaryArchSuffix
	lib:libz$secondaryArchSuffix
	"

PROVIDES_devel="
	mesa${secondaryArchSuffix}_devel = $portVersion
	devel:libGL$secondaryArchSuffix = $portVersion
	devel:libEGL$secondaryArchSuffix = $portVersion
	"
REQUIRES_devel="
	mesa$secondaryArchSuffix == $portVersion base
	"

BUILD_REQUIRES="
	haiku${secondaryArchSuffix}_devel
	devel:libz$secondaryArchSuffix
	"
BUILD_PREREQUIRES="
	llvm${secondaryArchSuffix}
	mako_python
	cmd:bison
	cmd:find
	cmd:flex
	cmd:gcc$secondaryArchSuffix
	cmd:ld$secondaryArchSuffix
	cmd:scons
	cmd:sed
	"

BUILD()
{
	if [ -n "$secondaryArchSuffix" ]; then
		export HAIKU_SECONDARY_ARCH="$effectiveTargetArchitecture"
	fi
	scons $jobArgs build=release
	#scons $jobArgs build=debug
}

INSTALL()
{
	mesaBuildDir=build/haiku-$effectiveTargetArchitecture

	mkdir -p $libDir
	mkdir -p $developLibDir

	# libGL.so makes up the core of our OpenGL kit
	cp $(find $mesaBuildDir -name 'libGL.so') $libDir
	symlinkRelative -s $libDir/libGL.so $developLibDir

	# OpenGL ES
	cp $(find $mesaBuildDir -name 'libEGL.so.1') $libDir
	symlinkRelative -s $libDir/libEGL.so.1 $libDir/libEGL.so
	symlinkRelative -s $libDir/libEGL.so.1 $developLibDir/libEGL.so

	# Our rendering add-ons
	mkdir -p $addOnsDir/opengl
	cp $(find $mesaBuildDir -name 'libswpipe.so') \
		"$addOnsDir/opengl/Software Pipe"

	# Set some nice version info
	appVersion=${portVersion//\./ }
	setversion "$libDir/libGL.so" -app $appVersion -long "Haiku OpenGL kit"
	setversion "$libDir/libEGL.so.1" -app $appVersion -long "Mesa EGL"
	setversion "$addOnsDir/opengl/Software Pipe" -app $appVersion -long "Gallium LLVM software pipe renderer"

	# OpenGL Kit
	mkdir -p $includeDir/os/opengl
	cp ./include/HaikuGL/OpenGLKit.h $includeDir/os/
	cp ./include/HaikuGL/GLView.h $includeDir/os/opengl/
	cp ./include/HaikuGL/GLRenderer.h $includeDir/os/opengl/

	# Standard GL headers
	mkdir -p $includeDir/GL
	cp ./include/GL/gl.h $includeDir/GL/
	cp ./include/GL/gl_mangle.h $includeDir/GL/
	cp ./include/GL/glext.h $includeDir/GL/

	# Create GL symlink in opengl kit
	symlinkRelative -s $includeDir/GL $includeDir/os/opengl/GL

	# Standard EGL headers
	mkdir -p $includeDir/EGL
	cp ./include/EGL/* $includeDir/EGL

	# Create GL symlink in opengl kit
	symlinkRelative -s $includeDir/EGL $includeDir/os/opengl/EGL

	# KHR headers for EGL
	mkdir -p $includeDir/KHR
	cp ./include/KHR/* $includeDir/KHR

	# Create KHR symlink in opengl kit
	symlinkRelative -s $includeDir/EGL $includeDir/os/opengl/KHR

	mkdir -p $developLibDir/pkgconfig
	cat > $developLibDir/pkgconfig/gl.pc << EOF
prefix=${prefix}
exec_prefix=${prefix}
libdir=${libDir}
includedir=${includeDir}

Name: gl
Description: Mesa OpenGL library
Version: $portVersion
Libs: -L${developLibDir} -lGL
Libs.private: -lm
EOF
	cat > $developLibDir/pkgconfig/egl.pc << EOF
prefix=${prefix}
exec_prefix=${prefix}
libdir=${libDir}
includedir=${includeDir}

Name: egl
Description: Mesa EGL library
Version: $portVersion
Libs: -L${developLibDir} -lEGL
Libs.private: -lm
EOF
	# devel package
	packageEntries devel \
		$developDir

	# swpipe renderer package
	packageEntries swpipe \
		"$addOnsDir/opengl/Software Pipe"
}


# ===== Gallium OpenGL Add-ons ===============================================
# ----- swpipe package -------------------------------------------------------

SUMMARY_swpipe="The Mesa LLVM enhanced Gallium software pipe renderer"
DESCRIPTION_swpipe="This 3D BGLRenderer add-on provides Gallium LLVM \
enhanced software rendering. Software pipe rendering performs all \
3D rendering on the systems CPU and doesn't require any specialized \
hardware. The usage of LLVM over traditional rasterization gives this \
renderer a boost in performance.

Gallium software pipe rendering is in an extremely early state as of \
this version of Mesa, and may not function as expected."

PROVIDES_swpipe="
	mesa${secondaryArchSuffix}_swpipe = $portVersion
	"
REQUIRES_swpipe="
	mesa$secondaryArchSuffix == $portVersion base
	"