shaderc: Adding metal shader type.

tools/shaderc/shaderc.cpp

@@ -707,10 +707,11 @@ int main(int _argc, const char* _argv[])
 
 	bool raw = cmdLine.hasArg('\0', "raw");
 
-	uint32_t glsl = 0;
-	uint32_t essl = 0;
-	uint32_t hlsl = 2;
-	uint32_t d3d  = 11;
+	uint32_t glsl  = 0;
+	uint32_t essl  = 0;
+	uint32_t hlsl  = 2;
+	uint32_t d3d   = 11;
+	uint32_t metal = 0;
 	const char* profile = cmdLine.findOption('p', "profile");
 	if (NULL != profile)
 	{
@@ -731,6 +732,10 @@ int main(int _argc, const char* _argv[])
 		{
 			hlsl = 5;
 		}
+		else if (0 == strcmp(profile, "metal") )
+		{
+			metal = 1;
+		}
 		else
 		{
 			glsl = atoi(profile);
@@ -796,6 +801,7 @@ int main(int _argc, const char* _argv[])
 //	preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_ESSL");
 	preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_GLSL");
 	preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_HLSL");
+	preprocessor.setDefaultDefine("BGFX_SHADER_LANGUAGE_METAL");
 	preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_COMPUTE");
 	preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_FRAGMENT");
 	preprocessor.setDefaultDefine("BGFX_SHADER_TYPE_VERTEX");
@@ -832,6 +838,9 @@ int main(int _argc, const char* _argv[])
 	{
 		preprocessor.setDefine("BX_PLATFORM_OSX=1");
 		preprocessor.setDefine(glslDefine);
+		char temp[256];
+		bx::snprintf(temp, sizeof(temp), "BGFX_SHADER_LANGUAGE_METAL=%d", metal);
+		preprocessor.setDefine(temp);
 	}
 	else if (0 == bx::stricmp(platform, "windows") )
 	{
@@ -1102,7 +1111,8 @@ int main(int _argc, const char* _argv[])
 			else
 			{
 				if (0 != glsl
-				||  0 != essl)
+				||  0 != essl
+				||  0 != metal)
 				{
 				}
 				else
@@ -1346,6 +1356,9 @@ int main(int _argc, const char* _argv[])
 						}
 					}
 				}
+				else if (0 != metal)
+				{
+				}
 				else
 				{
 					preprocessor.writef(
@@ -1711,11 +1724,27 @@ int main(int _argc, const char* _argv[])
 							}
 
 							code += preprocessor.m_preprocessed;
-							compiled = compileGLSLShader(cmdLine, essl, code, writer);
+							compiled = compileGLSLShader(cmdLine
+									, essl
+									, code
+									, writer
+									);
+						}
+						else if (0 != metal)
+						{
+							compiled = compileGLSLShader(cmdLine
+									, BX_MAKEFOURCC('M', 'T', 'L', 0)
+									, preprocessor.m_preprocessed
+									, writer
+									);
 						}
 						else
 						{
-							compiled = compileHLSLShader(cmdLine, d3d, preprocessor.m_preprocessed, writer);
+							compiled = compileHLSLShader(cmdLine
+									, d3d
+									, preprocessor.m_preprocessed
+									, writer
+									);
 						}
 
 						writer->close();

tools/shaderc/shaderc_glsl.cpp

@@ -16,6 +16,10 @@ bool compileGLSLShader(bx::CommandLine& _cmdLine, uint32_t _gles, const std::str
 	glslopt_target target = kGlslTargetOpenGL;
 	switch (_gles)
 	{
+	case BX_MAKEFOURCC('M', 'T', 'L', 0):
+		target = kGlslTargetMetal;
+		break;
+
 	case 2:
 		target = kGlslTargetOpenGLES20;
 		break;