Code refactor: remove MEM_WRITE_ONLY, always use MEM_READ_WRITE.

It's unlikely the driver can do useful optimizations with this, and if
we sum multiple samples we are reading from the memory anyway.

6 files changed, 4 insertions, 11 deletions

diff --git a/intern/cycles/device/device_memory.cpp b/intern/cycles/device/device_memory.cpp
index 9f4f60e7531..9c67345f39e 100644
--- a/intern/cycles/device/device_memory.cpp
+++ b/intern/cycles/device/device_memory.cpp
@@ -85,7 +85,6 @@ void device_memory::device_free()
 
 void device_memory::device_copy_to()
 {
-	assert(type != MEM_PIXELS && type != MEM_WRITE_ONLY);
 	if(data_size) {
 		device->mem_copy_to(*this);
 	}
@@ -99,7 +98,6 @@ void device_memory::device_copy_from(int y, int w, int h, int elem)
 
 void device_memory::device_zero()
 {
-	assert(type != MEM_PIXELS && type != MEM_WRITE_ONLY);
 	if(data_size) {
 		device->mem_zero(*this);
 	}
diff --git a/intern/cycles/device/device_memory.h b/intern/cycles/device/device_memory.h
index e6b2d059ef3..09b6602a102 100644
--- a/intern/cycles/device/device_memory.h
+++ b/intern/cycles/device/device_memory.h
@@ -33,7 +33,6 @@ class Device;
 
 enum MemoryType {
 	MEM_READ_ONLY,
-	MEM_WRITE_ONLY,
 	MEM_READ_WRITE,
 	MEM_TEXTURE,
 	MEM_PIXELS
@@ -325,13 +324,13 @@ public:
 			device_free();
 			host_free(data_pointer, sizeof(T)*data_size);
 			data_pointer = new_ptr;
+			assert(device_pointer == 0);
 		}
 
 		data_size = new_size;
 		data_width = width;
 		data_height = height;
 		data_depth = depth;
-		assert(device_pointer == 0);
 
 		return get_data();
 	}
diff --git a/intern/cycles/device/device_network.h b/intern/cycles/device/device_network.h
index a38d962c0af..b2be7e23147 100644
--- a/intern/cycles/device/device_network.h
+++ b/intern/cycles/device/device_network.h
@@ -282,7 +282,7 @@ public:
 
 		/* Can't transfer OpenGL texture over network. */
 		if(mem.type == MEM_PIXELS) {
-			mem.type = MEM_WRITE_ONLY;
+			mem.type = MEM_READ_WRITE;
 		}
 	}
 
diff --git a/intern/cycles/device/opencl/opencl_base.cpp b/intern/cycles/device/opencl/opencl_base.cpp
index 5e9debc3b17..e6c0961afd7 100644
--- a/intern/cycles/device/opencl/opencl_base.cpp
+++ b/intern/cycles/device/opencl/opencl_base.cpp
@@ -319,8 +319,6 @@ void OpenCLDeviceBase::mem_alloc(device_memory& mem)
 
 	if(mem.type == MEM_READ_ONLY || mem.type == MEM_TEXTURE)
 		mem_flag = CL_MEM_READ_ONLY;
-	else if(mem.type == MEM_WRITE_ONLY || mem.type == MEM_PIXELS)
-		mem_flag = CL_MEM_WRITE_ONLY;
 	else
 		mem_flag = CL_MEM_READ_WRITE;
 
@@ -484,8 +482,6 @@ device_ptr OpenCLDeviceBase::mem_alloc_sub_ptr(device_memory& mem, int offset, i
 	cl_mem_flags mem_flag;
 	if(mem.type == MEM_READ_ONLY || mem.type == MEM_TEXTURE)
 		mem_flag = CL_MEM_READ_ONLY;
-	else if(mem.type == MEM_WRITE_ONLY || mem.type == MEM_PIXELS)
-		mem_flag = CL_MEM_WRITE_ONLY;
 	else
 		mem_flag = CL_MEM_READ_WRITE;
 
diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp
index b3804f34963..2ce65ec055f 100644
--- a/intern/cycles/render/light.cpp
+++ b/intern/cycles/render/light.cpp
@@ -37,7 +37,7 @@ static void shade_background_pixels(Device *device, DeviceScene *dscene, int res
 	int height = res;
 
 	device_vector<uint4> d_input(device, "background_input", MEM_READ_ONLY);
-	device_vector<float4> d_output(device, "background_output", MEM_WRITE_ONLY);
+	device_vector<float4> d_output(device, "background_output", MEM_READ_WRITE);
 
 	uint4 *d_input_data = d_input.alloc(width*height);
 
diff --git a/intern/cycles/render/mesh_displace.cpp b/intern/cycles/render/mesh_displace.cpp
index ab3ae40d931..1f5f0481dec 100644
--- a/intern/cycles/render/mesh_displace.cpp
+++ b/intern/cycles/render/mesh_displace.cpp
@@ -115,7 +115,7 @@ bool MeshManager::displace(Device *device, DeviceScene *dscene, Scene *scene, Me
 		return false;
 	
 	/* run device task */
-	device_vector<float4> d_output(device, "displace_output", MEM_WRITE_ONLY);
+	device_vector<float4> d_output(device, "displace_output", MEM_READ_WRITE);
 	d_output.alloc(d_input_size);
 	d_output.zero_to_device();
 	d_input.copy_to_device();