Compositor: Full frame Exposure node

Adds full frame implementation to this node operation.
No functional changes.
1.7x faster than tiled fallback.

Reviewed By: jbakker

Differential Revision: https://developer.blender.org/D11766

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/compositor/operations/COM_ColorExposureOperation.cc b/source/blender/compositor/operations/COM_ColorExposureOperation.cc
index 1512ff87658..9e527f269cf 100644
--- a/source/blender/compositor/operations/COM_ColorExposureOperation.cc
+++ b/source/blender/compositor/operations/COM_ColorExposureOperation.cc
@@ -52,6 +52,19 @@ void ExposureOperation::executePixelSampled(float output[4],
   output[3] = inputValue[3];
 }
 
+void ExposureOperation::update_memory_buffer_row(PixelCursor &p)
+{
+  for (; p.out < p.row_end; p.next()) {
+    const float *in_value = p.ins[0];
+    const float *in_exposure = p.ins[1];
+    const float exposure = pow(2, in_exposure[0]);
+    p.out[0] = in_value[0] * exposure;
+    p.out[1] = in_value[1] * exposure;
+    p.out[2] = in_value[2] * exposure;
+    p.out[3] = in_value[3];
+  }
+}
+
 void ExposureOperation::deinitExecution()
 {
   this->m_inputProgram = nullptr;