Add dynamic offsets to C API.

CMakeLists.txt

@@ -287,7 +287,7 @@ if (SPIRV_CROSS_STATIC)
 endif()
 
 set(spirv-cross-abi-major 0)
-set(spirv-cross-abi-minor 17)
+set(spirv-cross-abi-minor 18)
 set(spirv-cross-abi-patch 0)
 
 if (SPIRV_CROSS_SHARED)

main.cpp

@@ -1093,6 +1093,7 @@ static int main_inner(int argc, char *argv[])
 	cbs.add("--msl-dispatch-base", [&args](CLIParser &) { args.msl_dispatch_base = true; });
 	cbs.add("--msl-dynamic-buffer", [&args](CLIParser &parser) {
 		args.msl_argument_buffers = true;
+		// Make sure next_uint() is called in-order.
 		uint32_t desc_set = parser.next_uint();
 		uint32_t binding = parser.next_uint();
 		args.msl_dynamic_buffers.push_back(make_pair(desc_set, binding));

spirv_cross_c.cpp

@@ -565,6 +565,10 @@ spvc_result spvc_compiler_options_set_uint(spvc_compiler_options options, spvc_c
 	case SPVC_COMPILER_OPTION_MSL_DISPATCH_BASE:
 		options->msl.dispatch_base = value != 0;
 		break;
+
+	case SPVC_COMPILER_OPTION_MSL_DYNAMIC_OFFSETS_BUFFER_INDEX:
+		options->msl.dynamic_offsets_buffer_index = value;
+		break;
 #endif
 
 	default:
@@ -902,6 +906,27 @@ spvc_result spvc_compiler_msl_add_resource_binding(spvc_compiler compiler,
 #endif
 }
 
+spvc_result spvc_compiler_msl_add_dynamic_buffer(spvc_compiler compiler, unsigned desc_set, unsigned binding, unsigned index)
+{
+#if SPIRV_CROSS_C_API_MSL
+	if (compiler->backend != SPVC_BACKEND_MSL)
+	{
+		compiler->context->report_error("MSL function used on a non-MSL backend.");
+		return SPVC_ERROR_INVALID_ARGUMENT;
+	}
+
+	auto &msl = *static_cast<CompilerMSL *>(compiler->compiler.get());
+	msl.add_dynamic_buffer(desc_set, binding, index);
+	return SPVC_SUCCESS;
+#else
+	(void)binding;
+	(void)desc_set;
+	(void)index;
+	compiler->context->report_error("MSL function used on a non-MSL backend.");
+	return SPVC_ERROR_INVALID_ARGUMENT;
+#endif
+}
+
 spvc_result spvc_compiler_msl_add_discrete_descriptor_set(spvc_compiler compiler, unsigned desc_set)
 {
 #if SPIRV_CROSS_C_API_MSL

spirv_cross_c.h

@@ -33,7 +33,7 @@ extern "C" {
 /* Bumped if ABI or API breaks backwards compatibility. */
 #define SPVC_C_API_VERSION_MAJOR 0
 /* Bumped if APIs or enumerations are added in a backwards compatible way. */
-#define SPVC_C_API_VERSION_MINOR 17
+#define SPVC_C_API_VERSION_MINOR 18
 /* Bumped if internal implementation details change. */
 #define SPVC_C_API_VERSION_PATCH 0
 
@@ -526,6 +526,7 @@ typedef enum spvc_compiler_option
 	SPVC_COMPILER_OPTION_MSL_DEVICE_INDEX = 40 | SPVC_COMPILER_OPTION_MSL_BIT,
 	SPVC_COMPILER_OPTION_MSL_VIEW_INDEX_FROM_DEVICE_INDEX = 41 | SPVC_COMPILER_OPTION_MSL_BIT,
 	SPVC_COMPILER_OPTION_MSL_DISPATCH_BASE = 42 | SPVC_COMPILER_OPTION_MSL_BIT,
+	SPVC_COMPILER_OPTION_MSL_DYNAMIC_OFFSETS_BUFFER_INDEX = 43 | SPVC_COMPILER_OPTION_MSL_BIT,
 
 	SPVC_COMPILER_OPTION_INT_MAX = 0x7fffffff
 } spvc_compiler_option;
@@ -632,6 +633,8 @@ SPVC_PUBLIC_API spvc_result spvc_compiler_msl_set_fragment_output_components(spv
 SPVC_PUBLIC_API unsigned spvc_compiler_msl_get_automatic_resource_binding(spvc_compiler compiler, spvc_variable_id id);
 SPVC_PUBLIC_API unsigned spvc_compiler_msl_get_automatic_resource_binding_secondary(spvc_compiler compiler, spvc_variable_id id);
 
+SPVC_PUBLIC_API spvc_result spvc_compiler_msl_add_dynamic_buffer(spvc_compiler compiler, unsigned desc_set, unsigned binding, unsigned index);
+
 /*
  * Reflect resources.
  * Maps almost 1:1 to C++ API.