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[D3D9] Fix for back buffer data loss during D3D9 present #2967

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[D3D9] Fix for back buffer data loss during D3D9 present #2967

wants to merge 2 commits into from

Commits on Oct 4, 2022

  1. [D3D9] Fix for back buffer data loss during D3D9 present. (doitsujin#16) 

    Acording to the D3D9 spec the content of the back buffer can be altered only if the SwapEffect is D3DSWAPEFFECT_DISCARD. The current implementation of the front buffer caused the previous back buffers to have their content lost.

This change keeps a similar present back buffer swapping logic for D3DSWAPEFFECT_DISCARD. For other swap effects the front buffer is a copy of the last presented back buffer.
    @mpyrzows @adamjer
    mpyrzows authored and adamjer committed Oct 4, 2022
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  2. [D3D9] Fix for back buffer data loss during D3D9 present. Review fixe… 

    …s. (doitsujin#23)
    @mpyrzows @adamjer
    mpyrzows authored and adamjer committed Oct 4, 2022
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