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PSP: fixed cursor disappearance bug in 16-bit games

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The 5650 16-bit format doesn't include alpha bits and is treated as having alpha by the PSP hardware. Other formats such as 5551 don't have their alpha bit set in the cursor buffer. Instead of adding it, we just turn on the 'reverse alpha' feature for these bits. The problem was not making an exception for 5650.
This commit is contained in:
Bluddy 2011-05-02 14:45:53 +03:00
parent a5598aaaa8
commit 185337f6a5
1 changed files with 14 additions and 2 deletions
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16
backends/platform/psp/cursor.cpp
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@ -327,8 +327,20 @@ inline void Cursor::setRendererModePalettized(bool palettized) {
_renderer.setAlphaReverse(false);
_renderer.setColorTest(false);
} else { // 16 bits, no palette
// Color test is an easy way for the hardware to make our keycolor
// transparent.
_renderer.setColorTest(true);
// Alpha blending is not strictly required, but makes the cursor look
// much better
_renderer.setAlphaBlending(true);
_renderer.setAlphaReverse(true); // We can't change all alpha values, so just reverse
_renderer.setColorTest(true); // Color test to make our key color transparent
// Pixel formats without alpha (5650) are considered to have their alpha set.
// Since pixel formats with alpha don't have their alpha bits set, we reverse
// the alpha format for them so that 0 alpha is 1.
if (_buffer.getPixelFormat() != PSPPixelFormat::Type_5650)
_renderer.setAlphaReverse(true);
else
_renderer.setAlphaReverse(false);
}
}