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Add: 32bpp SSE2 blitter palette animator (#6795)

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Create a new blitter mode: 32bpp-sse2-anim, which is 32bpp-anim + this.
32bpp-sse2-anim is now used by default where 32bpp-anim would have been.
Also use this with the 32bpp-sse4-anim blitter.

See issue #6469.
This commit is contained in:
Jonathan G Rennison
2018-05-23 09:55:04 +01:00
committed by PeterN
parent 306b999cf4
commit 17257b9620
18 changed files with 259 additions and 44 deletions
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22
src/blitter/32bpp_base.hpp
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@@ -146,30 +146,14 @@ public:
static const int DEFAULT_BRIGHTNESS = 128;
static Colour ReallyAdjustBrightness(Colour colour, uint8 brightness);
static inline Colour AdjustBrightness(Colour colour, uint8 brightness)
{
/* Shortcut for normal brightness */
if (brightness == DEFAULT_BRIGHTNESS) return colour;
uint16 ob = 0;
uint16 r = colour.r * brightness / DEFAULT_BRIGHTNESS;
uint16 g = colour.g * brightness / DEFAULT_BRIGHTNESS;
uint16 b = colour.b * brightness / DEFAULT_BRIGHTNESS;
/* Sum overbright */
if (r > 255) ob += r - 255;
if (g > 255) ob += g - 255;
if (b > 255) ob += b - 255;
if (ob == 0) return Colour(r, g, b, colour.a);
/* Reduce overbright strength */
ob /= 2;
return Colour(
r >= 255 ? 255 : min(r + ob * (255 - r) / 256, 255),
g >= 255 ? 255 : min(g + ob * (255 - g) / 256, 255),
b >= 255 ? 255 : min(b + ob * (255 - b) / 256, 255),
colour.a);
return ReallyAdjustBrightness(colour, brightness);
}
};