Fix #36113, Translate's wrapping has 1 pixel gap in X and Y after scale node.

The issue with wrapping is that it requires correct interpolation of the border pixels. Since interpolation is done at the far left end of the node tree in buffer/image/etc read operations, the wrapping
setting can not be used directly in those operations (otherwise in-line translate operations would cause conflicts). To make wrapping work correctly we need to add a buffer in front of the translate
operation, which can then be interpolated correctly based on wrapping. The WrapOperation becomes a variant of ReadBufferOperation, which uses its wrapping setting to determine the correct "extend" mode
for interpolation of the buffer.

1 files changed, 15 insertions, 0 deletions

diff --git a/source/blender/compositor/operations/COM_ReadBufferOperation.cpp b/source/blender/compositor/operations/COM_ReadBufferOperation.cpp
index 369e575e976..3aeef6bf409 100644
--- a/source/blender/compositor/operations/COM_ReadBufferOperation.cpp
+++ b/source/blender/compositor/operations/COM_ReadBufferOperation.cpp
@@ -66,6 +66,21 @@ void ReadBufferOperation::executePixel(float output[4], float x, float y, PixelS
 	}
 }
 
+void ReadBufferOperation::executePixelExtend(float output[4], float x, float y, PixelSampler sampler,
+                                             MemoryBufferExtend extend_x, MemoryBufferExtend extend_y)
+{
+	if (m_single_value) {
+		/* write buffer has a single value stored at (0,0) */
+		m_buffer->read(output, 0, 0);
+	}
+	else if (sampler == COM_PS_NEAREST) {
+		m_buffer->read(output, x, y, extend_x, extend_y);
+	}
+	else {
+		m_buffer->readBilinear(output, x, y, extend_x, extend_y);
+	}
+}
+
 void ReadBufferOperation::executePixel(float output[4], float x, float y, float dx, float dy, PixelSampler sampler)
 {
 	if (m_single_value) {