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comparison src/video/SDL_blit_1.c @ 91:e85e03f195b4

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From: "Markus F.X.J. Oberhumer" Subject: SDL CVS patches below you will find some small patches against the current SDL CVS. It adresses these things: 1) Use "&" instead of "%" in some cases. For negative signed integers (x % 8) is not always (x & 7), and the compiler can produce slightly faster code when using "&" here. 2) Some const issues.
author Sam Lantinga <slouken@lokigames.com>
date Sat, 07 Jul 2001 20:20:17 +0000
parents 74212992fb08
children e8157fcb3114
comparison
equal deleted inserted replaced
90:ee1f71c10889 91:e85e03f195b4
135 (map[src[HI]]<<16)|(map[src[LO]]); 135 (map[src[HI]]<<16)|(map[src[LO]]);
136 src += 2; 136 src += 2;
137 dst += 4; 137 dst += 4;
138 } 138 }
139 /* Get any leftovers */ 139 /* Get any leftovers */
140 switch (width % 4) { 140 switch (width & 3) {
141 case 3: 141 case 3:
142 *(Uint16 *)dst = map[*src++]; 142 *(Uint16 *)dst = map[*src++];
143 dst += 2; 143 dst += 2;
144 case 2: 144 case 2:
145 *(Uint32 *)dst = 145 *(Uint32 *)dst =
167 (map[src[HI]]<<16)|(map[src[LO]]); 167 (map[src[HI]]<<16)|(map[src[LO]]);
168 src += 2; 168 src += 2;
169 dst += 4; 169 dst += 4;
170 } 170 }
171 /* Get any leftovers */ 171 /* Get any leftovers */
172 switch (width % 4) { 172 switch (width & 3) {
173 case 3: 173 case 3:
174 *(Uint16 *)dst = map[*src++]; 174 *(Uint16 *)dst = map[*src++];
175 dst += 2; 175 dst += 2;
176 case 2: 176 case 2:
177 *(Uint32 *)dst = 177 *(Uint32 *)dst =
264 *dst++ = map[*src++]; 264 *dst++ = map[*src++];
265 *dst++ = map[*src++]; 265 *dst++ = map[*src++];
266 *dst++ = map[*src++]; 266 *dst++ = map[*src++];
267 *dst++ = map[*src++]; 267 *dst++ = map[*src++];
268 } 268 }
269 switch ( width % 4 ) { 269 switch ( width & 3 ) {
270 case 3: 270 case 3:
271 *dst++ = map[*src++]; 271 *dst++ = map[*src++];
272 case 2: 272 case 2:
273 *dst++ = map[*src++]; 273 *dst++ = map[*src++];
274 case 1: 274 case 1: