diff options
Diffstat (limited to 'src/mesa/main/image.c')
| -rw-r--r-- | src/mesa/main/image.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c index 4ea5f04c986..9ad97c56e40 100644 --- a/src/mesa/main/image.c +++ b/src/mesa/main/image.c @@ -41,36 +41,45 @@ /** - * Flip the order of the 2 bytes in each word in the given array. + * Flip the order of the 2 bytes in each word in the given array (src) and + * store the result in another array (dst). For in-place byte-swapping this + * function can be called with the same array for src and dst. * - * \param p array. + * \param dst the array where byte-swapped data will be stored. + * \param src the array with the source data we want to byte-swap. * \param n number of words. */ void -_mesa_swap2( GLushort *p, GLuint n ) +_mesa_swap2_copy( GLushort *dst, GLushort *src, GLuint n ) { GLuint i; for (i = 0; i < n; i++) { - p[i] = (p[i] >> 8) | ((p[i] << 8) & 0xff00); + dst[i] = (src[i] >> 8) | ((src[i] << 8) & 0xff00); } } /* - * Flip the order of the 4 bytes in each word in the given array. + * Flip the order of the 4 bytes in each word in the given array (src) and + * store the result in another array (dst). For in-place byte-swapping this + * function can be called with the same array for src and dst. + * + * \param dst the array where byte-swapped data will be stored. + * \param src the array with the source data we want to byte-swap. + * \param n number of words. */ void -_mesa_swap4( GLuint *p, GLuint n ) +_mesa_swap4_copy( GLuint *dst, GLuint *src, GLuint n ) { GLuint i, a, b; for (i = 0; i < n; i++) { - b = p[i]; + b = src[i]; a = (b >> 24) | ((b >> 8) & 0xff00) | ((b << 8) & 0xff0000) | ((b << 24) & 0xff000000); - p[i] = a; + dst[i] = a; } } |