diff options
Diffstat (limited to 'gs/base/gxdcconv.c')
| -rw-r--r-- | gs/base/gxdcconv.c | 130 |
1 files changed, 65 insertions, 65 deletions
diff --git a/gs/base/gxdcconv.c b/gs/base/gxdcconv.c index ccf08d3a1..c7c5fe200 100644 --- a/gs/base/gxdcconv.c +++ b/gs/base/gxdcconv.c @@ -1,6 +1,6 @@ /* Copyright (C) 2001-2006 Artifex Software, Inc. All Rights Reserved. - + This software is provided AS-IS with no warranty, either express or implied. @@ -45,17 +45,17 @@ frac color_rgb_to_gray(frac r, frac g, frac b, const gs_imager_state * pis) { return (r * (unsigned long)lum_red_weight + - g * (unsigned long)lum_green_weight + - b * (unsigned long)lum_blue_weight + - (lum_all_weights / 2)) - / lum_all_weights; + g * (unsigned long)lum_green_weight + + b * (unsigned long)lum_blue_weight + + (lum_all_weights / 2)) + / lum_all_weights; } /* Convert RGB to CMYK. */ /* Note that this involves black generation and undercolor removal. */ void color_rgb_to_cmyk(frac r, frac g, frac b, const gs_imager_state * pis, - frac cmyk[4], gs_memory_t *mem) + frac cmyk[4], gs_memory_t *mem) { frac c = frac_1 - r, m = frac_1 - g, y = frac_1 - b; frac k = (c < m ? min(c, y) : min(m, y)); @@ -65,44 +65,44 @@ color_rgb_to_cmyk(frac r, frac g, frac b, const gs_imager_state * pis, * but they must agree with the ones in gs_init.ps. */ frac bg = - (pis == NULL ? k : pis->black_generation == NULL ? frac_0 : - gx_map_color_frac(pis, k, black_generation)); + (pis == NULL ? k : pis->black_generation == NULL ? frac_0 : + gx_map_color_frac(pis, k, black_generation)); signed_frac ucr = - (pis == NULL ? k : pis->undercolor_removal == NULL ? frac_0 : - gx_map_color_frac(pis, k, undercolor_removal)); + (pis == NULL ? k : pis->undercolor_removal == NULL ? frac_0 : + gx_map_color_frac(pis, k, undercolor_removal)); if (ucr == frac_1) - cmyk[0] = cmyk[1] = cmyk[2] = 0; + cmyk[0] = cmyk[1] = cmyk[2] = 0; else if (ucr == frac_0) - cmyk[0] = c, cmyk[1] = m, cmyk[2] = y; + cmyk[0] = c, cmyk[1] = m, cmyk[2] = y; else { - if (!gs_currentcpsimode(mem)) { - /* C = max(0.0, min(1.0, 1 - R - UCR)), etc. */ - signed_frac not_ucr = (ucr < 0 ? frac_1 + ucr : frac_1); - - cmyk[0] = (c < ucr ? frac_0 : c > not_ucr ? frac_1 : c - ucr); - cmyk[1] = (m < ucr ? frac_0 : m > not_ucr ? frac_1 : m - ucr); - cmyk[2] = (y < ucr ? frac_0 : y > not_ucr ? frac_1 : y - ucr); - } else { - /* Adobe CPSI method */ - /* C = max(0.0, min(1.0, 1 - R / (1 - UCR))), etc. */ - float denom = frac2float(frac_1 - ucr); /* unscaled */ - float v; - - v = (float)frac_1 - r / denom; /* unscaled */ - cmyk[0] = - (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); - v = (float)frac_1 - g / denom; /* unscaled */ - cmyk[1] = - (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); - v = (float)frac_1 - b / denom; /* unscaled */ - cmyk[2] = - (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); - } + if (!gs_currentcpsimode(mem)) { + /* C = max(0.0, min(1.0, 1 - R - UCR)), etc. */ + signed_frac not_ucr = (ucr < 0 ? frac_1 + ucr : frac_1); + + cmyk[0] = (c < ucr ? frac_0 : c > not_ucr ? frac_1 : c - ucr); + cmyk[1] = (m < ucr ? frac_0 : m > not_ucr ? frac_1 : m - ucr); + cmyk[2] = (y < ucr ? frac_0 : y > not_ucr ? frac_1 : y - ucr); + } else { + /* Adobe CPSI method */ + /* C = max(0.0, min(1.0, 1 - R / (1 - UCR))), etc. */ + float denom = frac2float(frac_1 - ucr); /* unscaled */ + float v; + + v = (float)frac_1 - r / denom; /* unscaled */ + cmyk[0] = + (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); + v = (float)frac_1 - g / denom; /* unscaled */ + cmyk[1] = + (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); + v = (float)frac_1 - b / denom; /* unscaled */ + cmyk[2] = + (is_fneg(v) ? frac_0 : v >= (float)frac_1 ? frac_1 : (frac) v); + } } cmyk[3] = bg; if_debug7('c', "[c]RGB 0x%x,0x%x,0x%x -> CMYK 0x%x,0x%x,0x%x,0x%x\n", - r, g, b, cmyk[0], cmyk[1], cmyk[2], cmyk[3]); + r, g, b, cmyk[0], cmyk[1], cmyk[2], cmyk[3]); } /* Convert CMYK to Gray. */ @@ -112,46 +112,46 @@ color_cmyk_to_gray(frac c, frac m, frac y, frac k, const gs_imager_state * pis) frac not_gray = color_rgb_to_gray(c, m, y, pis); return (not_gray > frac_1 - k ? /* gray + k > 1.0 */ - frac_0 : frac_1 - (not_gray + k)); + frac_0 : frac_1 - (not_gray + k)); } /* Convert CMYK to RGB. */ void color_cmyk_to_rgb(frac c, frac m, frac y, frac k, const gs_imager_state * pis, - frac rgb[3], gs_memory_t *mem) + frac rgb[3], gs_memory_t *mem) { switch (k) { - case frac_0: - rgb[0] = frac_1 - c; - rgb[1] = frac_1 - m; - rgb[2] = frac_1 - y; - break; - case frac_1: - rgb[0] = rgb[1] = rgb[2] = frac_0; - break; - default: - if (!gs_currentcpsimode(mem)) { - /* R = 1.0 - min(1.0, C + K), etc. */ - frac not_k = frac_1 - k; - - rgb[0] = (c > not_k ? frac_0 : not_k - c); - rgb[1] = (m > not_k ? frac_0 : not_k - m); - rgb[2] = (y > not_k ? frac_0 : not_k - y); - } else { - /* R = (1.0 - C) * (1.0 - K), etc. */ - ulong not_k = frac_1 - k; - - /* Compute not_k * (frac_1 - v) / frac_1 efficiently. */ - ulong prod; + case frac_0: + rgb[0] = frac_1 - c; + rgb[1] = frac_1 - m; + rgb[2] = frac_1 - y; + break; + case frac_1: + rgb[0] = rgb[1] = rgb[2] = frac_0; + break; + default: + if (!gs_currentcpsimode(mem)) { + /* R = 1.0 - min(1.0, C + K), etc. */ + frac not_k = frac_1 - k; + + rgb[0] = (c > not_k ? frac_0 : not_k - c); + rgb[1] = (m > not_k ? frac_0 : not_k - m); + rgb[2] = (y > not_k ? frac_0 : not_k - y); + } else { + /* R = (1.0 - C) * (1.0 - K), etc. */ + ulong not_k = frac_1 - k; + + /* Compute not_k * (frac_1 - v) / frac_1 efficiently. */ + ulong prod; #define deduct_black(v)\ (prod = (frac_1 - (v)) * not_k, frac_1_quo(prod)) - rgb[0] = deduct_black(c); - rgb[1] = deduct_black(m); - rgb[2] = deduct_black(y); + rgb[0] = deduct_black(c); + rgb[1] = deduct_black(m); + rgb[2] = deduct_black(y); #undef deduct_black - } + } } if_debug7('c', "[c]CMYK 0x%x,0x%x,0x%x,0x%x -> RGB 0x%x,0x%x,0x%x\n", - c, m, y, k, rgb[0], rgb[1], rgb[2]); + c, m, y, k, rgb[0], rgb[1], rgb[2]); } |