implementing shader variants

1 files changed, 12 insertions, 1 deletions

diff --git a/pipeline.cpp b/pipeline.cpp
index 374dad8..4d34ebd 100644
--- a/pipeline.cpp
+++ b/pipeline.cpp
@@ -254,6 +254,14 @@ Pipeline_Builder& Pipeline_Builder::shader(Shader_Id s) {
 	return *this;
 }
 
+Pipeline_Builder& Pipeline_Builder::option(
+	Shader_Type type,
+	int mask
+) {
+	pip->shader_masks[type] = mask;
+	return *this;
+}
+
 Pipeline_Builder& Pipeline_Builder::texture(
 	int binding,
 	Texture_Id t,
@@ -321,6 +329,7 @@ Pipeline& Pipeline_Builder::build() {
 }
 
 void Pipeline::hash() {
+	int i;
 #define h(n, v) \
 	n = fnv1a64_2(n, (uint8_t*)&v, sizeof v)
 	pipeline_hash = fnv1a64(0, 0);
@@ -347,8 +356,10 @@ void Pipeline::hash() {
 	h(pipeline_hash, blend_src_alpha);
 	h(pipeline_hash, blend_dst_alpha);
 	h(pipeline_hash, cull_mode);
+	for (i = 0; i < shader_type_count; i++)
+		h(pipeline_hash, shader_masks[i]);
 	{
-		int i, e = descriptor_count;
+		int e = descriptor_count;
 		descriptor_resource_hash = fnv1a64(0, 0);
 		for (i = 0; i < e; i++) {
 			Descriptor* d = &descriptors[i];