Code refactor: remove rng_state buffer and compute hash on the fly.

A little faster on some benchmark scenes, a little slower on others, seems
about performance neutral on average and saves a little memory.

3 files changed, 0 insertions, 16 deletions

diff --git a/intern/cycles/render/buffers.cpp b/intern/cycles/render/buffers.cpp
index cf402c3f214..cf66e5385c9 100644
--- a/intern/cycles/render/buffers.cpp
+++ b/intern/cycles/render/buffers.cpp
@@ -108,7 +108,6 @@ RenderTile::RenderTile()
 	stride = 0;
 
 	buffer = 0;
-	rng_state = 0;
 
 	buffers = NULL;
 }
@@ -131,11 +130,6 @@ void RenderBuffers::device_free()
 		device->mem_free(buffer);
 		buffer.clear();
 	}
-
-	if(rng_state.device_pointer) {
-		device->mem_free(rng_state);
-		rng_state.clear();
-	}
 }
 
 void RenderBuffers::reset(Device *device, BufferParams& params_)
@@ -149,11 +143,6 @@ void RenderBuffers::reset(Device *device, BufferParams& params_)
 	buffer.resize(params.width*params.height*params.get_passes_size());
 	device->mem_alloc("render_buffer", buffer, MEM_READ_WRITE);
 	device->mem_zero(buffer);
-
-	/* allocate rng state */
-	rng_state.resize(params.width, params.height);
-
-	device->mem_alloc("rng_state", rng_state, MEM_READ_WRITE);
 }
 
 bool RenderBuffers::copy_from_device(Device *from_device)
diff --git a/intern/cycles/render/buffers.h b/intern/cycles/render/buffers.h
index e56556c8abe..552dabe178a 100644
--- a/intern/cycles/render/buffers.h
+++ b/intern/cycles/render/buffers.h
@@ -74,8 +74,6 @@ public:
 
 	/* float buffer */
 	device_vector<float> buffer;
-	/* random number generator state */
-	device_vector<uint> rng_state;
 
 	Device *device;
 
@@ -149,7 +147,6 @@ public:
 	int tile_index;
 
 	device_ptr buffer;
-	device_ptr rng_state;
 
 	RenderBuffers *buffers;
 
diff --git a/intern/cycles/render/session.cpp b/intern/cycles/render/session.cpp
index f68efe38add..69cfb5c3e6e 100644
--- a/intern/cycles/render/session.cpp
+++ b/intern/cycles/render/session.cpp
@@ -384,7 +384,6 @@ bool Session::acquire_tile(Device *tile_device, RenderTile& rtile)
 		tile_manager.state.buffer.get_offset_stride(rtile.offset, rtile.stride);
 
 		rtile.buffer = buffers->buffer.device_pointer;
-		rtile.rng_state = buffers->rng_state.device_pointer;
 		rtile.buffers = buffers;
 		tile->buffers = buffers;
 
@@ -442,7 +441,6 @@ bool Session::acquire_tile(Device *tile_device, RenderTile& rtile)
 	tile->buffers->params.get_offset_stride(rtile.offset, rtile.stride);
 
 	rtile.buffer = tile->buffers->buffer.device_pointer;
-	rtile.rng_state = tile->buffers->rng_state.device_pointer;
 	rtile.buffers = tile->buffers;
 	rtile.sample = 0;