From 4cf4edff092ce2de617424e3990160684058791d Mon Sep 17 00:00:00 2001
From: Mathieu-Andre Chiasson <mchiasson@gmail.com>
Date: Sat, 29 Dec 2018 20:28:54 -0500
Subject: [PATCH] added Spir-V shader generator support

Vulkan support is coming...
---
 cmake/examples.cmake      |  7 ++++++-
 cmake/tools/shaderc.cmake | 13 ++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/cmake/examples.cmake b/cmake/examples.cmake
index 5224916..4a81e68 100755
--- a/cmake/examples.cmake
+++ b/cmake/examples.cmake
@@ -60,7 +60,12 @@ function( add_bgfx_shader FILE FOLDER )
 		set( GLSL_OUTPUT ${BGFX_DIR}/examples/runtime/shaders/glsl/${FILENAME}.bin )
 		shaderc_parse( GLSL ${COMMON} LINUX PROFILE 120 OUTPUT ${GLSL_OUTPUT} )
 		list( APPEND OUTPUTS "GLSL" )
-		set( OUTPUTS_PRETTY "${OUTPUTS_PRETTY}GLSL" )
+		set( OUTPUTS_PRETTY "${OUTPUTS_PRETTY}GLSL, " )
+		# spirv
+		set( SPIRV_OUTPUT ${BGFX_DIR}/examples/runtime/shaders/spirv/${FILENAME}.bin )
+		shaderc_parse( SPIRV ${COMMON} LINUX PROFILE spirv OUTPUT ${SPIRV_OUTPUT} )
+		list( APPEND OUTPUTS "SPIRV" )
+		set( OUTPUTS_PRETTY "${OUTPUTS_PRETTY}SPIRV" )
 		set( OUTPUT_FILES "" )
 		set( COMMANDS "" )
 		foreach( OUT ${OUTPUTS} )
diff --git a/cmake/tools/shaderc.cmake b/cmake/tools/shaderc.cmake
index dd31d2c..3dd9f4a 100644
--- a/cmake/tools/shaderc.cmake
+++ b/cmake/tools/shaderc.cmake
@@ -47,11 +47,11 @@ function( add_shader ARG_FILE )
 		set( PLATFORMS ${ARG_PLATFORMS} )
 	else()
 		if( MSVC )
-			set( PLATFORMS dx9 dx11 glsl essl asm.js )
+			set( PLATFORMS dx9 dx11 glsl essl asm.js spirv )
 		elseif( APPLE )
-			set( PLATFORMS metal glsl essl asm.js )
+			set( PLATFORMS metal glsl essl asm.js spirv )
 		else()
-			set( PLATFORMS glsl essl asm.js )
+			set( PLATFORMS glsl essl asm.js spirv )
 		endif()
 	endif()
 
@@ -75,6 +75,7 @@ function( add_shader ARG_FILE )
 	if( ARG_GLSL_VERSION )
 		set( GLSL_PROFILE PROFILE ${ARG_GLSL_VERSION} )
 	endif()
+	set( SPIRV_PROFILE PROFILE spirv )
 
 	# Add commands
 	set( OUTPUTS "" )
@@ -117,6 +118,12 @@ function( add_shader ARG_FILE )
 				ASM_JS
 				OUTPUT ${OUTPUT}
 			)
+		elseif( "${PLATFORM}" STREQUAL "spirv" )
+			list( APPEND OPTIONS
+				LINUX
+				${SPIRV_PROFILE}
+				OUTPUT ${OUTPUT}
+			)
 		else()
 			message( SEND_ERROR "add_shader given bad platform: ${PLATFORM}" )
 			return()