Fix T46408: Transform (bicubic) ID channel fails

2015-10-08 10:16:54 +11:00
parent 27ff2be921
commit 8918e089a5
1 changed files with 3 additions and 1 deletions
--- a/source/blender/compositor/operations/COM_IDMaskOperation.cpp
+++ b/source/blender/compositor/operations/COM_IDMaskOperation.cpp
@@ -38,7 +38,9 @@ void IDMaskOperation::executePixelSampled(float output[4], float x, float y, Pix
 	float inputValue[4];
 	
 	this->m_inputProgram->readSampled(inputValue, x, y, sampler);
-	const float a = (inputValue[0] == this->m_objectIndex) ? 1.0f : 0.0f;
+	/* 'round' since sampling may adjust value slightly.
+	 * ID-mask input are originally integers too. */
+	const float a = (roundf(inputValue[0]) == this->m_objectIndex) ? 1.0f : 0.0f;
 	output[0] = a;
 }