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GSdx (OGL HW): Perform a texture shuffle when the address of the framebuffer and the texture are the same. 

Tomb Raider: Angel of Darkness relies on this behavior to produce a distance fog effect.

Closes #2215
This commit is contained in:
Christian Kenny 2018-02-05 19:18:42 -05:00 committed by Akash
parent c1fd01545a
commit 10ebe16653
1 changed files with 7 additions and 1 deletions
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8
plugins/GSdx/GSRendererOGL.cpp
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@ -234,7 +234,13 @@ void GSRendererOGL::EmulateTextureShuffleAndFbmask()
// Avious dubious call to m_texture_shuffle on 16 bits games
// The pattern is severals column of 8 pixels. A single sprite
// smell fishy but a big sprite is wrong.
m_texture_shuffle = ((v[1].U - v[0].U) < 256);
// Tomb Raider Angel of Darkness relies on this behavior to produce a fog effect.
// In this case, the address of the framebuffer and texture are the same.
// The game will take RG => BA and then the BA => RG of next pixels.
// However, only RG => BA needs to be emulated because RG isn't used.
GL_INS("WARNING: Possible misdetection of a texture shuffle effect");
m_texture_shuffle = ((v[1].U - v[0].U) < 256) || m_context->FRAME.Block() == m_context->TEX0.TBP0;
}