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Omar Emara 5258b17ef6 Fix #114260: Compositor sometimes produces straight alpha 
The compositor sometimes produces straight alpha even though
premultiplied alpha is expected. Moreover, there is an inconsistency
between the CPU and GPU compositors.

For the GPU compositor, this is because GPU textures sometimes store
straight alpha, while the compositor always expects premultiplied alpha,
so we need to premultiply the alpha in those cases.

For the CPU compositor, this is because the image operation didn't
premultiply the alpha of byte textures, so we need to ensure
premultiplied alpha in those cases.

There is a data loss issue in case of byte images, since the IMB module
unpremultiplies premultiplied images then the compositor premultiplies
it again. But this will be handled in a different patch since it require
some design and refactoring first.

Pull Request: https://projects.blender.org/blender/blender/pulls/114305
 		2023-11-06 15:15:22 +01:00
..
COM_BufferArea.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_BufferOperation.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_BufferOperation.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_BufferRange.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_BuffersIterator.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_CPUDevice.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_CPUDevice.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ChunkOrder.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ChunkOrder.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ChunkOrderHotspot.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ChunkOrderHotspot.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_CompositorContext.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_CompositorContext.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ConstantFolder.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ConstantFolder.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Converter.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Converter.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Debug.cc Cleanup: Remove unnecessary includes from C++ data structure headers 2023-09-01 21:37:11 +02:00
COM_Debug.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Device.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Device.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Enums.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_Enums.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ExecutionGroup.cc Cleanup: Remove unnecessary includes from C++ data structure headers 2023-09-01 21:37:11 +02:00
COM_ExecutionGroup.h Cleanup: spelling in comments, white-space in comments 2023-10-19 18:53:16 +11:00
COM_ExecutionModel.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ExecutionModel.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ExecutionSystem.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_ExecutionSystem.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_FullFrameExecutionModel.cc Cleanup: Remove unnecessary includes from C++ data structure headers 2023-09-01 21:37:11 +02:00
COM_FullFrameExecutionModel.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MemoryBuffer.cc Fix #114260: Compositor sometimes produces straight alpha 2023-11-06 15:15:22 +01:00
COM_MemoryBuffer.h Fix #114260: Compositor sometimes produces straight alpha 2023-11-06 15:15:22 +01:00
COM_MemoryProxy.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MemoryProxy.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MetaData.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MetaData.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MultiThreadedOperation.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MultiThreadedOperation.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MultiThreadedRowOperation.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_MultiThreadedRowOperation.h Cleanup: Replace usage of old BLI_array macros with C++ types 2023-10-06 03:02:17 +02:00
COM_Node.cc RNA: return PointerRNA from rna create functions 2023-09-06 00:48:50 +02:00
COM_Node.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeConverter.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeConverter.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeGraph.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeGraph.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeOperation.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeOperation.h Cleanup: spelling in comments, white-space in comments 2023-10-19 18:53:16 +11:00
COM_NodeOperationBuilder.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_NodeOperationBuilder.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_OpenCLDevice.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_OpenCLDevice.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_SharedOperationBuffers.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_SharedOperationBuffers.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_SingleThreadedOperation.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_SingleThreadedOperation.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_TiledExecutionModel.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_TiledExecutionModel.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_WorkPackage.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_WorkPackage.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_WorkScheduler.cc License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_WorkScheduler.h License Headers: Set copyright to "Blender Authors", add AUTHORS 2023-08-16 00:20:26 +10:00
COM_compositor.cc Cleanup: Move compositor headers to c++ 2023-10-16 10:45:54 +02:00