abort of masterbrightness calculation if manipulation factor is 0
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@ -403,6 +403,9 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
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// Apply final brightness adjust (MASTER_BRIGHT)
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// Reference: http://nocash.emubase.de/gbatek.htm#dsvideo (Under MASTER_BRIGHTNESS)
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/* Mightymax> it should be more effective if the windowmanager applies brightness when drawing */
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/* it will most likly take acceleration, while we are stuck here with CPU power */
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switch ((gpu->MASTER_BRIGHT>>14)&3)
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{
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// Disabled
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@ -415,6 +418,8 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
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unsigned int masterBrightFactor = gpu->MASTER_BRIGHT&31;
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masterBrightFactor = masterBrightFactor > 16 ? 16 : masterBrightFactor;
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if (!masterBrightFactor) break ; /* when we wont do anything, we dont need to loop */
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for(i16 = 0; i16 < 256; ++i16)
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{
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COLOR dstColor;
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@ -446,6 +451,8 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
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unsigned int masterBrightFactor = gpu->MASTER_BRIGHT&31;
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masterBrightFactor = masterBrightFactor > 16 ? 16 : masterBrightFactor;
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if (!masterBrightFactor) break ; /* when we wont do anything, we dont need to loop */
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for(i16 = 0; i16 < 256; ++i16)
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{
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COLOR dstColor;
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