41 static void CalculateGammaRamp(float gamma, Uint16 *ramp)  in CalculateGammaRamp()  argument
46 	if ( gamma <= 0.0f ) {  in CalculateGammaRamp()
53 	if ( gamma == 1.0f ) {  in CalculateGammaRamp()
61 		gamma = 1.0f / gamma;  in CalculateGammaRamp()
63 			value = (int)(pow((double)i/256.0, gamma)*65535.0+0.5);  in CalculateGammaRamp()
71 static void CalculateGammaFromRamp(float *gamma, Uint16 *ramp)  in CalculateGammaFromRamp()  argument
79 	*gamma = 1.0;  in CalculateGammaFromRamp()
89 		*gamma = 1.0f / (sum / count);  in CalculateGammaFromRamp()
158 	if ( ! video->gamma ) {  in SDL_SetGammaRamp()
164 		SDL_memcpy(&video->gamma[0*256], red, 256*sizeof(*video->gamma));  in SDL_SetGammaRamp()
167 		SDL_memcpy(&video->gamma[1*256], green, 256*sizeof(*video->gamma));  in SDL_SetGammaRamp()
170 		SDL_memcpy(&video->gamma[2*256], blue, 256*sizeof(*video->gamma));  in SDL_SetGammaRamp()
189 		succeeded = video->SetGammaRamp(this, video->gamma);  in SDL_SetGammaRamp()
202 	if ( ! video->gamma ) {  in SDL_GetGammaRamp()
203 		video->gamma = SDL_malloc(3*256*sizeof(*video->gamma));  in SDL_GetGammaRamp()
204 		if ( ! video->gamma ) {  in SDL_GetGammaRamp()
210 			video->GetGammaRamp(this, video->gamma);  in SDL_GetGammaRamp()
215 				video->gamma[0*256+i] = (i << 8) | i;  in SDL_GetGammaRamp()
216 				video->gamma[1*256+i] = (i << 8) | i;  in SDL_GetGammaRamp()
217 				video->gamma[2*256+i] = (i << 8) | i;  in SDL_GetGammaRamp()
224 		SDL_memcpy(red, &video->gamma[0*256], 256*sizeof(*red));  in SDL_GetGammaRamp()
227 		SDL_memcpy(green, &video->gamma[1*256], 256*sizeof(*green));  in SDL_GetGammaRamp()
230 		SDL_memcpy(blue, &video->gamma[2*256], 256*sizeof(*blue));  in SDL_GetGammaRamp()