Enhance `stdole.IPicture` stream and bitmap handling tests.#893

Merged

junkmd merged 10 commits intoenthought:mainfrom

junkmd:stream_picture_tests

Dec 30, 2025

Commits on Dec 29, 2025

test: Simplify BMP generation in `test_stream.py` by removing DPI calculation.
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test: Use variables for width and height in `create_24bit_pixel_data` call.
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test: Add `test_save_created_bitmap_picture` for OLE picture saving.
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refactor: Use `get_dc` context manager in `test_save_created_bitmap_picture`.
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refactor: Use `select_object` context manager for GDI object handling
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refactor: Use `create_compatible_dc` context manager for GDI DC handling
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refactor: Use `create_image_rendering_dc` context manager for GDI rendering
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test: Add `test_load_from_buffer_stream` for OLE picture loading and saving.
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fix: Ensure GDI operations are flushed before reading pixel data.
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refactor: Rename `test_ole_load_picture` to `test_load_from_handle_stream`.
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