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.
2017-09-27 00:39:53 +02:00
parent 5b7d6ea54b
commit e3e16cecc4
25 changed files with 21 additions and 93 deletions
--- a/intern/cycles/kernel/kernel_random.h
+++ b/intern/cycles/kernel/kernel_random.h
@@ -15,6 +15,7 @@
 */

 #include "kernel/kernel_jitter.h"
+#include "util/util_hash.h"

 CCL_NAMESPACE_BEGIN

@@ -115,14 +116,13 @@ ccl_device_forceinline void path_rng_2D(KernelGlobals *kg,
 }

 ccl_device_inline void path_rng_init(KernelGlobals *kg,
-                                     ccl_global uint *rng_state,
                                     int sample, int num_samples,
                                     uint *rng_hash,
                                     int x, int y,
                                     float *fx, float *fy)
 {
 	/* load state */
-	*rng_hash = *rng_state;
+	*rng_hash = hash_int_2d(x, y);
 	*rng_hash ^= kernel_data.integrator.seed;

 #ifdef __DEBUG_CORRELATION__