[Bf-blender-cvs] [b9c9b87fa62] blender2.8: Cleanup: remove BLI_frand ugly global random generator usage from compositor.

[Bastien Montagne]

Commit: b9c9b87fa62edfd880074ca4a5e39cdc3fb20206
Author: Bastien Montagne
Date:   Thu Jun 14 16:24:55 2018 +0200
Branches: blender2.8
https://developer.blender.org/rBb9c9b87fa62edfd880074ca4a5e39cdc3fb20206

Cleanup: remove BLI_frand ugly global random generator usage from compositor.

===================================================================

M	source/blender/compositor/operations/COM_ScreenLensDistortionOperation.cpp
M	source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h

===================================================================

diff --git a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.cpp b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.cpp
index 651c336452e..1ebb0f93939 100644
--- a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.cpp
+++ b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.cpp
@@ -26,6 +26,7 @@ extern "C" {
 #  include "BLI_math.h"
 #  include "BLI_utildefines.h"
 #  include "BLI_rand.h"
+#  include "PIL_time.h"
 }
 
 ScreenLensDistortionOperation::ScreenLensDistortionOperation() : NodeOperation()
@@ -59,6 +60,10 @@ void ScreenLensDistortionOperation::initExecution()
 {
 	this->m_inputProgram = this->getInputSocketReader(0);
 	this->initMutex();
+
+	uint rng_seed = (uint)(PIL_check_seconds_timer_i() & UINT_MAX);
+	rng_seed ^= (uint)GET_INT_FROM_POINTER(m_inputProgram);
+	this->m_rng = BLI_rng_new(rng_seed);
 	
 	this->m_cx = 0.5f * (float)getWidth();
 	this->m_cy = 0.5f * (float)getHeight();
@@ -142,7 +147,7 @@ void ScreenLensDistortionOperation::accumulate(MemoryBuffer *buffer,
 	float dk4 = m_dk4[a];
 
 	for (float z = 0; z < ds; ++z) {
-		float tz = (z + (m_jitter ? BLI_frand() : 0.5f)) * sd;
+		float tz = (z + (m_jitter ? BLI_rng_get_float(m_rng) : 0.5f)) * sd;
 		float t = 1.0f - (k4 + tz * dk4) * r_sq;
 		
 		float xy[2];
@@ -192,6 +197,7 @@ void ScreenLensDistortionOperation::deinitExecution()
 {
 	this->deinitMutex();
 	this->m_inputProgram = NULL;
+	BLI_rng_free(this->m_rng);
 }
 
 void ScreenLensDistortionOperation::determineUV(float result[6], float x, float y) const
diff --git a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
index 648a7a6e551..71df73ebd8c 100644
--- a/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
+++ b/source/blender/compositor/operations/COM_ScreenLensDistortionOperation.h
@@ -31,6 +31,7 @@ private:
 	 * Cached reference to the inputProgram
 	 */
 	SocketReader *m_inputProgram;
+	struct RNG *m_rng;
 	
 	bool m_fit;
 	bool m_jitter;