/* Calculating the gamma by integrating the gamma ramps isn't exact, so this function isn't officially supported. */ int SDL_GetGamma(float *red, float *green, float *blue) { int succeeded; SDL_VideoDevice *video = current_video; SDL_VideoDevice *this = current_video; succeeded = -1; #ifdef USE_MATH_H /* Prefer using GetGammaRamp(), as it's more flexible */ { Uint16 ramp[3][256]; succeeded = SDL_GetGammaRamp(ramp[0], ramp[1], ramp[2]); if ( succeeded >= 0 ) { CalculateGammaFromRamp(red, ramp[0]); CalculateGammaFromRamp(green, ramp[1]); CalculateGammaFromRamp(blue, ramp[2]); } } #else SDL_SetError("Gamma correction not supported"); #endif if ( (succeeded < 0) && video->GetGamma ) { SDL_ClearError(); succeeded = video->GetGamma(this, red, green, blue); } return succeeded; }
int SDL_GetGamma(float *red, float *green, float *blue) { int succeeded; SDL_VideoDevice *video = current_video; SDL_VideoDevice *this = current_video; succeeded = -1; /* Prefer using GetGammaRamp(), as it's more flexible */ { Uint16 ramp[3][256]; succeeded = SDL_GetGammaRamp(ramp[0], ramp[1], ramp[2]); if ( succeeded >= 0 ) { CalculateGammaFromRamp(red, ramp[0]); CalculateGammaFromRamp(green, ramp[1]); CalculateGammaFromRamp(blue, ramp[2]); } } if ( (succeeded < 0) && video->GetGamma ) { SDL_ClearError(); succeeded = video->GetGamma(this, red, green, blue); } return succeeded; }