diff options
Diffstat (limited to '')
| -rw-r--r-- | src/gamma-helper.c | 225 |
1 files changed, 146 insertions, 79 deletions
diff --git a/src/gamma-helper.c b/src/gamma-helper.c index 78a38fc..9ae7915 100644 --- a/src/gamma-helper.c +++ b/src/gamma-helper.c @@ -27,141 +27,185 @@ #define ANY bits64 + /** - * Get current the gamma ramps for a CRTC, re-encoding version + * Convert any set of gamma ramps into a 64-bit integer array with all channels * - * @param this The CRTC state - * @param ramps The gamma ramps to fill with the current values - * @param depth_user The depth of the gamma ramps that are provided by the user, - * `-1` for `float`, `-2` for `double` - * @param depth_system The depth of the gamma ramps as required by the adjustment method, - * `-1` for `float`, `-2` for `double` - * @param fun Function that is to be used read the ramps, its parameters have - * the same function as those of this function with the same names, - * and the return value too is identical - * @return Zero on success, otherwise (negative) the value of an - * error identifier provided by this library + * @param depth The depth of the gamma ramp, `-1` for `float`, `-2` for `double` + * @param n The grand size of gamma ramps (sum of all channels' sizes) + * @param out Output array + * @param in Input gamma ramps */ -int libgamma_translated_ramp_get_(libgamma_crtc_state_t* restrict this, - libgamma_gamma_ramps_any_t* restrict ramps, - signed depth_user, signed depth_system, - libgamma_get_ramps_any_fun* fun) +static void translate_to_64(signed depth, size_t n, uint64_t* restrict out, libgamma_gamma_ramps_any_t in) { - size_t n = ramps->ANY.red_size + ramps->ANY.green_size + ramps->ANY.blue_size; - size_t d, i; - int r, e; - libgamma_gamma_ramps_any_t ramps_sys; - uint64_t* ramps_full; - - switch (depth_system) - { - case 16: d = sizeof(uint16_t); break; - case 32: d = sizeof(uint32_t); break; - case 64: d = sizeof(uint64_t); break; - case -1: d = sizeof(float); break; - case -2: d = sizeof(double); break; - default: - return errno = EINVAL, LIBGAMMA_ERRNO_SET; - } - - ramps_sys.ANY. red_size = ramps->ANY. red_size; - ramps_sys.ANY.green_size = ramps->ANY.green_size; - ramps_sys.ANY. blue_size = ramps->ANY. blue_size; - - ramps_sys.ANY.red = malloc(n * d); - ramps_sys.ANY.green = (void*)(((char*)(ramps_sys.ANY. red)) + ramps->ANY. red_size * d / sizeof(char)); - ramps_sys.ANY.blue = (void*)(((char*)(ramps_sys.ANY.green)) + ramps->ANY.green_size * d / sizeof(char)); - if (ramps_sys.ANY.red == NULL) - return LIBGAMMA_ERRNO_SET; - - if ((r = fun(this, &ramps_sys))) - { - e = errno; - free(ramps_sys.ANY.red); - return errno = e, r; - } - - ramps_full = malloc(n * sizeof(uint64_t)); - if (ramps_full) - { - e = errno; - free(ramps_sys.ANY.red); - return errno = e, r; - } - - switch (depth_system) + size_t i; + switch (depth) { case 16: for (i = 0; i < n; i++) - ramps_full[i] = (uint64_t)(ramps_sys.bits16.red[i]) * 0x0001000100010001ULL; + out[i] = (uint64_t)(in.bits16.red[i]) * 0x0001000100010001ULL; break; case 32: for (i = 0; i < n; i++) - ramps_full[i] = (uint64_t)(ramps_sys.bits32.red[i]) * 0x0000000100000001ULL; + out[i] = (uint64_t)(in.bits32.red[i]) * 0x0000000100000001ULL; break; case 64: for (i = 0; i < n; i++) - ramps_full[i] = ramps_sys.bits64.red[i]; + out[i] = in.bits64.red[i]; break; case -1: for (i = 0; i < n; i++) - ramps_full[i] = (uint64_t)(ramps_sys.float_single.red[i] * (float)UINT64_MAX); + out[i] = (uint64_t)(in.float_single.red[i] * (float)UINT64_MAX); break; case -2: for (i = 0; i < n; i++) - ramps_full[i] = (uint64_t)(ramps_sys.float_double.red[i] * (double)UINT64_MAX); + out[i] = (uint64_t)(in.float_double.red[i] * (double)UINT64_MAX); break; default: /* This is not possible. */ abort(); break; } +} + + +/** + * Undo the actions of `translate_to_64` + * + * @param depth The depth of the gamma ramp, `-1` for `float`, `-2` for `double` + * @param n The grand size of gamma ramps (sum of all channels' sizes) + * @param out Output gamma ramps + * @param in Input array, may be modified + */ +static void translate_from_64(signed depth, size_t n, libgamma_gamma_ramps_any_t out, uint64_t* restrict in) +{ + size_t i; - free(ramps_sys.ANY.red); - - if ((0 < depth_user) && (depth_user < 64)) - for (i = 0; i < n; i++) - { - ramps_full[i] >>= (64 - depth_user - 1); - ramps_full[i] = (ramps_full[i] & 1) | (ramps_full[i] >> 1); - } - - switch (depth_user) + switch (depth) { case 16: for (i = 0; i < n; i++) - ramps->bits16.red[i] = (uint16_t)(ramps_full[i]); + in[i] >>= (64 - depth - 1), + out.bits16.red[i] = (uint16_t)((in[i] & 1) | (in[i] >> 1)); break; case 32: for (i = 0; i < n; i++) - ramps->bits32.red[i] = (uint32_t)(ramps_full[i]); + in[i] >>= (64 - depth - 1), + out.bits32.red[i] = (uint32_t)((in[i] & 1) | (in[i] >> 1)); break; case 64: for (i = 0; i < n; i++) - ramps->bits64.red[i] = ramps_full[i]; + out.bits64.red[i] = in[i]; break; case -1: for (i = 0; i < n; i++) - ramps->float_single.red[i] = (float)(ramps_full[i]) / (float)UINT64_MAX; + out.float_single.red[i] = (float)(in[i]) / (float)UINT64_MAX; break; case -2: for (i = 0; i < n; i++) - ramps->float_double.red[i] = (double)(ramps_full[i]) / (double)UINT64_MAX; + out.float_double.red[i] = (double)(in[i]) / (double)UINT64_MAX; break; default: /* This is not possible. */ abort(); break; } +} + + +/** + * Allocate and initalise a gamma ramp with any depth + * + * @param ramps_sys Output gamma ramps + * @param ramps The gamma ramps whose sizes should be duplicated + * @param depth The depth of the gamma ramps to allocate, + * `-1` for `float`, `-2` for `double` + * @param elements Output reference for the grand size of the gamma ramps + * @return Zero on success, otherwise (negative) the value of an + * error identifier provided by this library + */ +static int allocated_any_ramp(libgamma_gamma_ramps_any_t* restrict ramps_sys, + libgamma_gamma_ramps_any_t ramps, signed depth, size_t* restrict elements) +{ + size_t n = 0; + size_t d; + switch (depth) + { + case 16: d = sizeof(uint16_t); break; + case 32: d = sizeof(uint32_t); break; + case 64: d = sizeof(uint64_t); break; + case -1: d = sizeof(float); break; + case -2: d = sizeof(double); break; + default: + return errno = EINVAL, LIBGAMMA_ERRNO_SET; + } + + n += ramps_sys->ANY. red_size = ramps.ANY. red_size; + n += ramps_sys->ANY.green_size = ramps.ANY.green_size; + n += ramps_sys->ANY. blue_size = ramps.ANY. blue_size; + + ramps_sys->ANY.red = malloc(n * d); + ramps_sys->ANY.green = (void*)(((char*)(ramps_sys->ANY. red)) + ramps.ANY. red_size * d / sizeof(char)); + ramps_sys->ANY.blue = (void*)(((char*)(ramps_sys->ANY.green)) + ramps.ANY.green_size * d / sizeof(char)); + + *elements = n; + return ramps_sys->ANY.red ? 0 : LIBGAMMA_ERRNO_SET; +} + + +/** + * Get current the gamma ramps for a CRTC, re-encoding version + * + * @param this The CRTC state + * @param ramps The gamma ramps to fill with the current values + * @param depth_user The depth of the gamma ramps that are provided by the user, + * `-1` for `float`, `-2` for `double` + * @param depth_system The depth of the gamma ramps as required by the adjustment method, + * `-1` for `float`, `-2` for `double` + * @param fun Function that is to be used read the ramps, its parameters have + * the same function as those of this function with the same names, + * and the return value too is identical + * @return Zero on success, otherwise (negative) the value of an + * error identifier provided by this library + */ +int libgamma_translated_ramp_get_(libgamma_crtc_state_t* restrict this, + libgamma_gamma_ramps_any_t* restrict ramps, + signed depth_user, signed depth_system, + libgamma_get_ramps_any_fun* fun) +{ + size_t n; + int r; + libgamma_gamma_ramps_any_t ramps_sys; + uint64_t* ramps_full; + + if ((r = allocated_any_ramp(&ramps_sys, *ramps, depth_system, &n))) + return r; + + if ((r = fun(this, &ramps_sys))) + { + free(ramps_sys.ANY.red); + return r; + } + + if ((ramps_full = malloc(n * sizeof(uint64_t))) == NULL) + { + free(ramps_sys.ANY.red); + return LIBGAMMA_ERRNO_SET; + } + + translate_to_64(depth_system, n, ramps_full, ramps_sys); + free(ramps_sys.ANY.red); + + translate_from_64(depth_user, n, *ramps, ramps_full); free(ramps_full); return 0; } @@ -187,7 +231,30 @@ int libgamma_translated_ramp_set_(libgamma_crtc_state_t* restrict this, signed depth_user, signed depth_system, libgamma_set_ramps_any_fun* fun) { + size_t n; + int r; + libgamma_gamma_ramps_any_t ramps_sys; + uint64_t* ramps_full; + + if ((r = allocated_any_ramp(&ramps_sys, ramps, depth_system, &n))) + return r; + + if ((ramps_full = malloc(n * sizeof(uint64_t))) == NULL) + { + free(ramps_sys.ANY.red); + return LIBGAMMA_ERRNO_SET; + } + + translate_to_64(depth_user, n, ramps_full, ramps); + translate_from_64(depth_system, n, ramps_sys, ramps_full); + free(ramps_full); + + r = fun(this, ramps_sys); + + free(ramps_sys.ANY.red); + return r; } + #undef ANY |