Cycles: Also support the constant emission speedup for mesh lights

Reviewers: brecht, sergey, dingto, juicyfruit

Differential Revision: https://developer.blender.org/D2220

2 files changed, 10 insertions, 7 deletions

diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp
index 3b7935803f4..93f6d7902f0 100644
--- a/intern/cycles/render/light.cpp
+++ b/intern/cycles/render/light.cpp
@@ -661,11 +661,6 @@ void LightManager::device_update_points(Device *device,
 			use_light_visibility = true;
 		}
 
-		float3 fixed_emission = make_float3(0.0f, 0.0f, 0.0f);
-		if(shader->is_constant_emission(&fixed_emission)) {
-			shader_id |= SHADER_FIXED_EMISSION;
-		}
-
 		if(light->type == LIGHT_POINT) {
 			shader_id &= ~SHADER_AREA_LIGHT;
 
@@ -765,7 +760,7 @@ void LightManager::device_update_points(Device *device,
 			light_data[light_index*LIGHT_SIZE + 3] = make_float4(samples, 0.0f, 0.0f, 0.0f);
 		}
 
-		light_data[light_index*LIGHT_SIZE + 4] = make_float4(max_bounces, fixed_emission.x, fixed_emission.y, fixed_emission.z);
+		light_data[light_index*LIGHT_SIZE + 4] = make_float4(max_bounces, 0.0f, 0.0f, 0.0f);
 
 		light_index++;
 	}
diff --git a/intern/cycles/render/shader.cpp b/intern/cycles/render/shader.cpp
index 1849161ead9..06b6dd969d8 100644
--- a/intern/cycles/render/shader.cpp
+++ b/intern/cycles/render/shader.cpp
@@ -401,7 +401,7 @@ void ShaderManager::device_update_common(Device *device,
 	if(scene->shaders.size() == 0)
 		return;
 
-	uint shader_flag_size = scene->shaders.size()*2;
+	uint shader_flag_size = scene->shaders.size()*SHADER_SIZE;
 	uint *shader_flag = dscene->shader_flag.resize(shader_flag_size);
 	uint i = 0;
 	bool has_volumes = false;
@@ -446,9 +446,17 @@ void ShaderManager::device_update_common(Device *device,
 		if(shader->displacement_method != DISPLACE_TRUE && shader->graph_bump)
 			flag |= SD_HAS_BSSRDF_BUMP;
 
+		/* constant emission check */
+		float3 constant_emission = make_float3(0.0f, 0.0f, 0.0f);
+		if(shader->is_constant_emission(&constant_emission))
+			flag |= SD_HAS_CONSTANT_EMISSION;
+
 		/* regular shader */
 		shader_flag[i++] = flag;
 		shader_flag[i++] = shader->pass_id;
+		shader_flag[i++] = __float_as_int(constant_emission.x);
+		shader_flag[i++] = __float_as_int(constant_emission.y);
+		shader_flag[i++] = __float_as_int(constant_emission.z);
 
 		has_transparent_shadow |= (flag & SD_HAS_TRANSPARENT_SHADOW) != 0;
 	}