Uploaded image for project: 'Core ReactOS'
  1. Core ReactOS
  2. CORE-17485

StretchBlt halftone mode doesn't work correctly

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Details

    • Bug
    • Resolution: Unresolved
    • Minor
    • None
    • None
    • None

    Description

      On 20210215-0.4.15-dev-2056-g8b6e5e8.GNU_8.4.0:

      The StretchBlt function with setting STRETCH_HALFTONE mode by using SetStretchBltMode function doesn't work correctly.

      1. Extract HalftoneStretchBlt.zip.
      2. Execute HalftoneStretchBlt.exe in HalftoneStretchBlt folder.
      3. File output.bmp will be generated.
      4. The pixels must be RGB(64, 64, 64) in Windows, but RGB(0, 0, 0) in ReactOS.

      Generally, STRETCH_HALFTONE mode is used for smoothly stretching bitmap image.

      Attachments

        6. diff.bmp
          2 kB
          Katayama Hirofumi MZ
        8. output2-larger-bilinear.bmp
          48 kB
          Katayama Hirofumi MZ
        9. output2-larger-stretchblt-halftone.bmp
          48 kB
          Katayama Hirofumi MZ
        10. output2-smaller-bilinear.bmp
          2 kB
          Katayama Hirofumi MZ
        11. output2-smaller-stretchblt-halftone.bmp
          2 kB
          Katayama Hirofumi MZ
        12. output-reactos-FAILED.bmp
          0.2 kB
          Katayama Hirofumi MZ
        13. output-Win10-SUCCESSFUL.bmp
          0.2 kB
          Katayama Hirofumi MZ
        14. output-Win2k3-SUCCESSFUL.bmp
          0.2 kB
          Katayama Hirofumi MZ
        15. output-WinXP-SUCCESSFUL.bmp
          0.2 kB
          Katayama Hirofumi MZ
        16. palette.c
          22 kB
          DougLyons

        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. CORE-15820 Desktop wallpaper uses Nearest Neighbor scaling

          • Major - Major loss of function.
          • Open

          Activity

            People

              Unassigned Unassigned
              katayama_hirofumi_mz Katayama Hirofumi MZ
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              3 Start watching this issue

              Dates

                Created:
                Updated: