diff options
Diffstat (limited to 'libglitter_split_uint64_raster.c')
| -rw-r--r-- | libglitter_split_uint64_raster.c | 109 |
1 files changed, 107 insertions, 2 deletions
diff --git a/libglitter_split_uint64_raster.c b/libglitter_split_uint64_raster.c index a831ef7..75ec90b 100644 --- a/libglitter_split_uint64_raster.c +++ b/libglitter_split_uint64_raster.c @@ -1,5 +1,6 @@ /* See LICENSE file for copyright and license details. */ #include "common.h" +#ifndef TEST void @@ -8,7 +9,7 @@ libglitter_split_uint64_raster(uint16_t *rasters[3], uint16_t **alphap, uint64_t { uint64_t alpha, map; size_t position; - size_t channel; + unsigned char channel; alpha = ~(red | green | blue); red /= 0xFF; @@ -22,10 +23,114 @@ libglitter_split_uint64_raster(uint16_t *rasters[3], uint16_t **alphap, uint64_t map = red | green | blue | alpha; for (position = 0; position < 4; position++) { - channel = ((const unsigned char *)&map)[position * 2]; + channel = ((const unsigned char *)&map)[position * sizeof(uint16_t)]; if (channel < 3) rasters[channel] = &((uint16_t *)raster)[position]; else if (alphap) *alphap = &((uint16_t *)raster)[position]; } } + + +#else + + +static void +check(int with_alpha, int r, int g, int b, int a) +{ + int red_shift = r * sizeof(uint16_t) * 8; + int green_shift = g * sizeof(uint16_t) * 8; + int blue_shift = b * sizeof(uint16_t) * 8; + int alpha_shift = a * sizeof(uint16_t) * 8; + uint16_t full = ~(uint16_t)0; + uint16_t red = (uint16_t)~0 / (uint16_t)0xF * (uint16_t)0x5; + uint16_t green = (uint16_t)~0 / (uint16_t)0xF * (uint16_t)0x8; + uint16_t blue = (uint16_t)~0 / (uint16_t)0xF * (uint16_t)0xA; + uint16_t alpha = (uint16_t)~0 / (uint16_t)0xF * (uint16_t)0x9; + uint64_t red_mask = (uint64_t)red << red_shift; + uint64_t green_mask = (uint64_t)green << green_shift; + uint64_t blue_mask = (uint64_t)blue << blue_shift; + uint64_t alpha_mask = (uint64_t)alpha << alpha_shift; + uint64_t raster = red_mask | green_mask | blue_mask | alpha_mask; + uint16_t *rasters[4] = {NULL, NULL, NULL, NULL}; + + ASSERT(r != g && r != b && r != a); + ASSERT(g != b && g != a); + ASSERT(b != a); + + libglitter_split_uint64_raster(rasters, + with_alpha ? &rasters[3] : NULL, + &raster, + (uint64_t)full << red_shift, + (uint64_t)full << green_shift, + (uint64_t)full << blue_shift); + ASSERT(rasters[0]); + ASSERT(rasters[1]); + ASSERT(rasters[2]); + ASSERT(*rasters[0] == red); + ASSERT(*rasters[1] == green); + ASSERT(*rasters[2] == blue); + if (with_alpha) { + ASSERT(rasters[3]); + ASSERT(*rasters[3] == alpha); + } else { + ASSERT(!rasters[3]); + } +} + +int +main(void) +{ + check(0, 0, 1, 2, 3); + check(0, 0, 1, 3, 2); + check(0, 0, 2, 1, 3); + check(0, 0, 2, 3, 1); + check(0, 0, 3, 1, 2); + check(0, 0, 3, 2, 1); + check(0, 1, 0, 2, 3); + check(0, 1, 0, 3, 2); + check(0, 1, 2, 0, 3); + check(0, 1, 2, 3, 0); + check(0, 1, 3, 0, 2); + check(0, 1, 3, 2, 0); + check(0, 2, 0, 1, 3); + check(0, 2, 0, 3, 1); + check(0, 2, 1, 0, 3); + check(0, 2, 1, 3, 0); + check(0, 2, 3, 0, 1); + check(0, 2, 3, 1, 0); + check(0, 3, 0, 1, 2); + check(0, 3, 0, 2, 1); + check(0, 3, 1, 0, 2); + check(0, 3, 1, 2, 0); + check(0, 3, 2, 0, 1); + check(0, 3, 2, 1, 0); + check(1, 0, 1, 2, 3); + check(1, 0, 1, 3, 2); + check(1, 0, 2, 1, 3); + check(1, 0, 2, 3, 1); + check(1, 0, 3, 1, 2); + check(1, 0, 3, 2, 1); + check(1, 1, 0, 2, 3); + check(1, 1, 0, 3, 2); + check(1, 1, 2, 0, 3); + check(1, 1, 2, 3, 0); + check(1, 1, 3, 0, 2); + check(1, 1, 3, 2, 0); + check(1, 2, 0, 1, 3); + check(1, 2, 0, 3, 1); + check(1, 2, 1, 0, 3); + check(1, 2, 1, 3, 0); + check(1, 2, 3, 0, 1); + check(1, 2, 3, 1, 0); + check(1, 3, 0, 1, 2); + check(1, 3, 0, 2, 1); + check(1, 3, 1, 0, 2); + check(1, 3, 1, 2, 0); + check(1, 3, 2, 0, 1); + check(1, 3, 2, 1, 0); + return 0; +} + + +#endif |