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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4680 | right-hear | 1 | #include "fitz.h" |
| 2 | |||
| 3 | #define SLOWCMYK |
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| 4 | |||
| 5 | fz_colorspace * |
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| 6 | fz_new_colorspace(char *name, int n) |
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| 7 | { |
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| 8 | fz_colorspace *cs = fz_malloc(sizeof(fz_colorspace)); |
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| 9 | cs->refs = 1; |
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| 10 | fz_strlcpy(cs->name, name, sizeof cs->name); |
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| 11 | cs->n = n; |
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| 12 | cs->to_rgb = NULL; |
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| 13 | cs->from_rgb = NULL; |
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| 14 | cs->free_data = NULL; |
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| 15 | cs->data = NULL; |
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| 16 | return cs; |
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| 17 | } |
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| 18 | |||
| 19 | fz_colorspace * |
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| 20 | fz_keep_colorspace(fz_colorspace *cs) |
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| 21 | { |
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| 22 | if (cs->refs < 0) |
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| 23 | return cs; |
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| 24 | cs->refs ++; |
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| 25 | return cs; |
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| 26 | } |
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| 27 | |||
| 28 | void |
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| 29 | fz_drop_colorspace(fz_colorspace *cs) |
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| 30 | { |
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| 31 | if (cs && cs->refs < 0) |
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| 32 | return; |
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| 33 | if (cs && --cs->refs == 0) |
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| 34 | { |
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| 35 | if (cs->free_data && cs->data) |
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| 36 | cs->free_data(cs); |
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| 37 | fz_free(cs); |
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| 38 | } |
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| 39 | } |
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| 40 | |||
| 41 | /* Device colorspace definitions */ |
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| 42 | |||
| 43 | static void gray_to_rgb(fz_colorspace *cs, float *gray, float *rgb) |
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| 44 | { |
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| 45 | rgb[0] = gray[0]; |
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| 46 | rgb[1] = gray[0]; |
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| 47 | rgb[2] = gray[0]; |
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| 48 | } |
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| 49 | |||
| 50 | static void rgb_to_gray(fz_colorspace *cs, float *rgb, float *gray) |
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| 51 | { |
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| 52 | float r = rgb[0]; |
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| 53 | float g = rgb[1]; |
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| 54 | float b = rgb[2]; |
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| 55 | gray[0] = r * 0.3f + g * 0.59f + b * 0.11f; |
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| 56 | } |
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| 57 | |||
| 58 | static void rgb_to_rgb(fz_colorspace *cs, float *rgb, float *xyz) |
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| 59 | { |
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| 60 | xyz[0] = rgb[0]; |
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| 61 | xyz[1] = rgb[1]; |
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| 62 | xyz[2] = rgb[2]; |
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| 63 | } |
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| 64 | |||
| 65 | static void bgr_to_rgb(fz_colorspace *cs, float *bgr, float *rgb) |
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| 66 | { |
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| 67 | rgb[0] = bgr[2]; |
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| 68 | rgb[1] = bgr[1]; |
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| 69 | rgb[2] = bgr[0]; |
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| 70 | } |
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| 71 | |||
| 72 | static void rgb_to_bgr(fz_colorspace *cs, float *rgb, float *bgr) |
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| 73 | { |
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| 74 | bgr[0] = rgb[2]; |
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| 75 | bgr[1] = rgb[1]; |
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| 76 | bgr[2] = rgb[0]; |
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| 77 | } |
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| 78 | |||
| 79 | static void cmyk_to_rgb(fz_colorspace *cs, float *cmyk, float *rgb) |
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| 80 | { |
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| 81 | #ifdef SLOWCMYK /* from poppler */ |
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| 82 | float c = cmyk[0], m = cmyk[1], y = cmyk[2], k = cmyk[3]; |
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| 83 | float c1 = 1 - c, m1 = 1 - m, y1 = 1 - y, k1 = 1 - k; |
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| 84 | float r, g, b, x; |
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| 85 | |||
| 86 | /* this is a matrix multiplication, unrolled for performance */ |
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| 87 | x = c1 * m1 * y1 * k1; /* 0 0 0 0 */ |
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| 88 | r = g = b = x; |
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| 89 | x = c1 * m1 * y1 * k; /* 0 0 0 1 */ |
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| 90 | r += 0.1373 * x; |
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| 91 | g += 0.1216 * x; |
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| 92 | b += 0.1255 * x; |
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| 93 | x = c1 * m1 * y * k1; /* 0 0 1 0 */ |
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| 94 | r += x; |
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| 95 | g += 0.9490 * x; |
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| 96 | x = c1 * m1 * y * k; /* 0 0 1 1 */ |
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| 97 | r += 0.1098 * x; |
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| 98 | g += 0.1020 * x; |
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| 99 | x = c1 * m * y1 * k1; /* 0 1 0 0 */ |
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| 100 | r += 0.9255 * x; |
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| 101 | b += 0.5490 * x; |
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| 102 | x = c1 * m * y1 * k; /* 0 1 0 1 */ |
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| 103 | r += 0.1412 * x; |
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| 104 | x = c1 * m * y * k1; /* 0 1 1 0 */ |
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| 105 | r += 0.9294 * x; |
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| 106 | g += 0.1098 * x; |
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| 107 | b += 0.1412 * x; |
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| 108 | x = c1 * m * y * k; /* 0 1 1 1 */ |
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| 109 | r += 0.1333 * x; |
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| 110 | x = c * m1 * y1 * k1; /* 1 0 0 0 */ |
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| 111 | g += 0.6784 * x; |
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| 112 | b += 0.9373 * x; |
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| 113 | x = c * m1 * y1 * k; /* 1 0 0 1 */ |
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| 114 | g += 0.0588 * x; |
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| 115 | b += 0.1412 * x; |
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| 116 | x = c * m1 * y * k1; /* 1 0 1 0 */ |
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| 117 | g += 0.6510 * x; |
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| 118 | b += 0.3137 * x; |
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| 119 | x = c * m1 * y * k; /* 1 0 1 1 */ |
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| 120 | g += 0.0745 * x; |
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| 121 | x = c * m * y1 * k1; /* 1 1 0 0 */ |
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| 122 | r += 0.1804 * x; |
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| 123 | g += 0.1922 * x; |
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| 124 | b += 0.5725 * x; |
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| 125 | x = c * m * y1 * k; /* 1 1 0 1 */ |
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| 126 | b += 0.0078 * x; |
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| 127 | x = c * m * y * k1; /* 1 1 1 0 */ |
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| 128 | r += 0.2118 * x; |
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| 129 | g += 0.2119 * x; |
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| 130 | b += 0.2235 * x; |
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| 131 | |||
| 132 | rgb[0] = CLAMP(r, 0, 1); |
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| 133 | rgb[1] = CLAMP(g, 0, 1); |
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| 134 | rgb[2] = CLAMP(b, 0, 1); |
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| 135 | #else |
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| 136 | rgb[0] = 1 - MIN(1, cmyk[0] + cmyk[3]); |
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| 137 | rgb[1] = 1 - MIN(1, cmyk[1] + cmyk[3]); |
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| 138 | rgb[2] = 1 - MIN(1, cmyk[2] + cmyk[3]); |
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| 139 | #endif |
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| 140 | } |
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| 141 | |||
| 142 | static void rgb_to_cmyk(fz_colorspace *cs, float *rgb, float *cmyk) |
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| 143 | { |
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| 144 | float c, m, y, k; |
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| 145 | c = 1 - rgb[0]; |
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| 146 | m = 1 - rgb[1]; |
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| 147 | y = 1 - rgb[2]; |
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| 148 | k = MIN(c, MIN(m, y)); |
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| 149 | cmyk[0] = c - k; |
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| 150 | cmyk[1] = m - k; |
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| 151 | cmyk[2] = y - k; |
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| 152 | cmyk[3] = k; |
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| 153 | } |
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| 154 | |||
| 155 | static fz_colorspace k_device_gray = { -1, "DeviceGray", 1, gray_to_rgb, rgb_to_gray }; |
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| 156 | static fz_colorspace k_device_rgb = { -1, "DeviceRGB", 3, rgb_to_rgb, rgb_to_rgb }; |
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| 157 | static fz_colorspace k_device_bgr = { -1, "DeviceRGB", 3, bgr_to_rgb, rgb_to_bgr }; |
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| 158 | static fz_colorspace k_device_cmyk = { -1, "DeviceCMYK", 4, cmyk_to_rgb, rgb_to_cmyk }; |
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| 159 | |||
| 160 | fz_colorspace *fz_device_gray = &k_device_gray; |
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| 161 | fz_colorspace *fz_device_rgb = &k_device_rgb; |
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| 162 | fz_colorspace *fz_device_bgr = &k_device_bgr; |
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| 163 | fz_colorspace *fz_device_cmyk = &k_device_cmyk; |
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| 164 | |||
| 165 | fz_colorspace * |
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| 166 | fz_find_device_colorspace(char *name) |
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| 167 | { |
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| 168 | if (!strcmp(name, "DeviceGray")) |
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| 169 | return fz_device_gray; |
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| 170 | if (!strcmp(name, "DeviceRGB")) |
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| 171 | return fz_device_rgb; |
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| 172 | if (!strcmp(name, "DeviceBGR")) |
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| 173 | return fz_device_bgr; |
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| 174 | if (!strcmp(name, "DeviceCMYK")) |
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| 175 | return fz_device_cmyk; |
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| 176 | fz_warn("unknown device colorspace: %s", name); |
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| 177 | return NULL; |
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| 178 | } |
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| 179 | |||
| 180 | /* Fast pixmap color conversions */ |
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| 181 | |||
| 182 | static void fast_gray_to_rgb(fz_pixmap *src, fz_pixmap *dst) |
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| 183 | { |
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| 184 | unsigned char *s = src->samples; |
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| 185 | unsigned char *d = dst->samples; |
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| 186 | int n = src->w * src->h; |
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| 187 | while (n--) |
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| 188 | { |
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| 189 | d[0] = s[0]; |
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| 190 | d[1] = s[0]; |
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| 191 | d[2] = s[0]; |
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| 192 | d[3] = s[1]; |
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| 193 | s += 2; |
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| 194 | d += 4; |
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| 195 | } |
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| 196 | } |
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| 197 | |||
| 198 | static void fast_gray_to_cmyk(fz_pixmap *src, fz_pixmap *dst) |
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| 199 | { |
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| 200 | unsigned char *s = src->samples; |
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| 201 | unsigned char *d = dst->samples; |
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| 202 | int n = src->w * src->h; |
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| 203 | while (n--) |
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| 204 | { |
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| 205 | d[0] = 0; |
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| 206 | d[1] = 0; |
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| 207 | d[2] = 0; |
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| 208 | d[3] = s[0]; |
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| 209 | d[4] = s[1]; |
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| 210 | s += 2; |
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| 211 | d += 5; |
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| 212 | } |
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| 213 | } |
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| 214 | |||
| 215 | static void fast_rgb_to_gray(fz_pixmap *src, fz_pixmap *dst) |
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| 216 | { |
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| 217 | unsigned char *s = src->samples; |
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| 218 | unsigned char *d = dst->samples; |
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| 219 | int n = src->w * src->h; |
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| 220 | while (n--) |
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| 221 | { |
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| 222 | d[0] = ((s[0]+1) * 77 + (s[1]+1) * 150 + (s[2]+1) * 28) >> 8; |
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| 223 | d[1] = s[3]; |
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| 224 | s += 4; |
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| 225 | d += 2; |
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| 226 | } |
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| 227 | } |
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| 228 | |||
| 229 | static void fast_bgr_to_gray(fz_pixmap *src, fz_pixmap *dst) |
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| 230 | { |
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| 231 | unsigned char *s = src->samples; |
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| 232 | unsigned char *d = dst->samples; |
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| 233 | int n = src->w * src->h; |
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| 234 | while (n--) |
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| 235 | { |
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| 236 | d[0] = ((s[0]+1) * 28 + (s[1]+1) * 150 + (s[2]+1) * 77) >> 8; |
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| 237 | d[1] = s[3]; |
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| 238 | s += 4; |
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| 239 | d += 2; |
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| 240 | } |
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| 241 | } |
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| 242 | |||
| 243 | static void fast_rgb_to_cmyk(fz_pixmap *src, fz_pixmap *dst) |
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| 244 | { |
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| 245 | unsigned char *s = src->samples; |
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| 246 | unsigned char *d = dst->samples; |
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| 247 | int n = src->w * src->h; |
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| 248 | while (n--) |
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| 249 | { |
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| 250 | unsigned char c = 255 - s[0]; |
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| 251 | unsigned char m = 255 - s[1]; |
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| 252 | unsigned char y = 255 - s[2]; |
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| 253 | unsigned char k = MIN(c, MIN(m, y)); |
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| 254 | d[0] = c - k; |
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| 255 | d[1] = m - k; |
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| 256 | d[2] = y - k; |
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| 257 | d[3] = k; |
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| 258 | d[4] = s[3]; |
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| 259 | s += 4; |
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| 260 | d += 5; |
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| 261 | } |
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| 262 | } |
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| 263 | |||
| 264 | static void fast_bgr_to_cmyk(fz_pixmap *src, fz_pixmap *dst) |
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| 265 | { |
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| 266 | unsigned char *s = src->samples; |
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| 267 | unsigned char *d = dst->samples; |
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| 268 | int n = src->w * src->h; |
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| 269 | while (n--) |
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| 270 | { |
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| 271 | unsigned char c = 255 - s[2]; |
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| 272 | unsigned char m = 255 - s[1]; |
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| 273 | unsigned char y = 255 - s[0]; |
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| 274 | unsigned char k = MIN(c, MIN(m, y)); |
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| 275 | d[0] = c - k; |
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| 276 | d[1] = m - k; |
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| 277 | d[2] = y - k; |
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| 278 | d[3] = k; |
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| 279 | d[4] = s[3]; |
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| 280 | s += 4; |
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| 281 | d += 5; |
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| 282 | } |
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| 283 | } |
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| 284 | |||
| 285 | static void fast_cmyk_to_gray(fz_pixmap *src, fz_pixmap *dst) |
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| 286 | { |
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| 287 | unsigned char *s = src->samples; |
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| 288 | unsigned char *d = dst->samples; |
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| 289 | int n = src->w * src->h; |
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| 290 | while (n--) |
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| 291 | { |
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| 292 | unsigned char c = fz_mul255(s[0], 77); |
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| 293 | unsigned char m = fz_mul255(s[1], 150); |
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| 294 | unsigned char y = fz_mul255(s[2], 28); |
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| 295 | d[0] = 255 - MIN(c + m + y + s[3], 255); |
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| 296 | d[1] = s[4]; |
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| 297 | s += 5; |
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| 298 | d += 2; |
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| 299 | } |
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| 300 | } |
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| 301 | |||
| 302 | static void fast_cmyk_to_rgb(fz_pixmap *src, fz_pixmap *dst) |
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| 303 | { |
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| 304 | unsigned char *s = src->samples; |
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| 305 | unsigned char *d = dst->samples; |
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| 306 | int n = src->w * src->h; |
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| 307 | while (n--) |
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| 308 | { |
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| 309 | #ifdef SLOWCMYK |
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| 310 | float cmyk[4], rgb[3]; |
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| 311 | cmyk[0] = s[0] / 255.0f; |
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| 312 | cmyk[1] = s[1] / 255.0f; |
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| 313 | cmyk[2] = s[2] / 255.0f; |
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| 314 | cmyk[3] = s[3] / 255.0f; |
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| 315 | cmyk_to_rgb(NULL, cmyk, rgb); |
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| 316 | d[0] = rgb[0] * 255; |
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| 317 | d[1] = rgb[1] * 255; |
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| 318 | d[2] = rgb[2] * 255; |
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| 319 | #else |
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| 320 | d[0] = 255 - MIN(s[0] + s[3], 255); |
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| 321 | d[1] = 255 - MIN(s[1] + s[3], 255); |
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| 322 | d[2] = 255 - MIN(s[2] + s[3], 255); |
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| 323 | #endif |
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| 324 | d[3] = s[4]; |
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| 325 | s += 5; |
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| 326 | d += 4; |
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| 327 | } |
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| 328 | } |
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| 329 | |||
| 330 | static void fast_cmyk_to_bgr(fz_pixmap *src, fz_pixmap *dst) |
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| 331 | { |
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| 332 | unsigned char *s = src->samples; |
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| 333 | unsigned char *d = dst->samples; |
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| 334 | int n = src->w * src->h; |
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| 335 | while (n--) |
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| 336 | { |
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| 337 | #ifdef SLOWCMYK |
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| 338 | float cmyk[4], rgb[3]; |
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| 339 | cmyk[0] = s[0] / 255.0f; |
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| 340 | cmyk[1] = s[1] / 255.0f; |
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| 341 | cmyk[2] = s[2] / 255.0f; |
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| 342 | cmyk[3] = s[3] / 255.0f; |
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| 343 | cmyk_to_rgb(NULL, cmyk, rgb); |
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| 344 | d[0] = rgb[2] * 255; |
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| 345 | d[1] = rgb[1] * 255; |
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| 346 | d[2] = rgb[0] * 255; |
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| 347 | #else |
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| 348 | d[0] = 255 - MIN(s[2] + s[3], 255); |
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| 349 | d[1] = 255 - MIN(s[1] + s[3], 255); |
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| 350 | d[2] = 255 - MIN(s[0] + s[3], 255); |
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| 351 | #endif |
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| 352 | d[3] = s[4]; |
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| 353 | s += 5; |
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| 354 | d += 4; |
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| 355 | } |
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| 356 | } |
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| 357 | |||
| 358 | static void fast_rgb_to_bgr(fz_pixmap *src, fz_pixmap *dst) |
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| 359 | { |
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| 360 | unsigned char *s = src->samples; |
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| 361 | unsigned char *d = dst->samples; |
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| 362 | int n = src->w * src->h; |
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| 363 | while (n--) |
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| 364 | { |
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| 365 | d[0] = s[2]; |
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| 366 | d[1] = s[1]; |
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| 367 | d[2] = s[0]; |
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| 368 | d[3] = s[3]; |
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| 369 | s += 4; |
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| 370 | d += 4; |
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| 371 | } |
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| 372 | } |
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| 373 | |||
| 374 | static void |
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| 375 | fz_std_conv_pixmap(fz_pixmap *src, fz_pixmap *dst) |
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| 376 | { |
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| 377 | float srcv[FZ_MAX_COLORS]; |
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| 378 | float dstv[FZ_MAX_COLORS]; |
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| 379 | int srcn, dstn; |
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| 380 | int y, x, k, i; |
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| 381 | |||
| 382 | fz_colorspace *ss = src->colorspace; |
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| 383 | fz_colorspace *ds = dst->colorspace; |
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| 384 | |||
| 385 | unsigned char *s = src->samples; |
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| 386 | unsigned char *d = dst->samples; |
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| 387 | |||
| 388 | assert(src->w == dst->w && src->h == dst->h); |
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| 389 | assert(src->n == ss->n + 1); |
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| 390 | assert(dst->n == ds->n + 1); |
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| 391 | |||
| 392 | srcn = ss->n; |
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| 393 | dstn = ds->n; |
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| 394 | |||
| 395 | /* Special case for Lab colorspace (scaling of components to float) */ |
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| 396 | if (!strcmp(ss->name, "Lab") && srcn == 3) |
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| 397 | { |
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| 398 | for (y = 0; y < src->h; y++) |
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| 399 | { |
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| 400 | for (x = 0; x < src->w; x++) |
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| 401 | { |
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| 402 | srcv[0] = *s++ / 255.0f * 100; |
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| 403 | srcv[1] = *s++ - 128; |
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| 404 | srcv[2] = *s++ - 128; |
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| 405 | |||
| 406 | fz_convert_color(ss, srcv, ds, dstv); |
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| 407 | |||
| 408 | for (k = 0; k < dstn; k++) |
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| 409 | *d++ = dstv[k] * 255; |
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| 410 | |||
| 411 | *d++ = *s++; |
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| 412 | } |
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| 413 | } |
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| 414 | } |
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| 415 | |||
| 416 | /* Brute-force for small images */ |
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| 417 | else if (src->w * src->h < 256) |
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| 418 | { |
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| 419 | for (y = 0; y < src->h; y++) |
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| 420 | { |
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| 421 | for (x = 0; x < src->w; x++) |
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| 422 | { |
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| 423 | for (k = 0; k < srcn; k++) |
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| 424 | srcv[k] = *s++ / 255.0f; |
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| 425 | |||
| 426 | fz_convert_color(ss, srcv, ds, dstv); |
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| 427 | |||
| 428 | for (k = 0; k < dstn; k++) |
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| 429 | *d++ = dstv[k] * 255; |
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| 430 | |||
| 431 | *d++ = *s++; |
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| 432 | } |
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| 433 | } |
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| 434 | } |
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| 435 | |||
| 436 | /* 1-d lookup table for separation and similar colorspaces */ |
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| 437 | else if (srcn == 1) |
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| 438 | { |
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| 439 | unsigned char lookup[FZ_MAX_COLORS * 256]; |
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| 440 | |||
| 441 | for (i = 0; i < 256; i++) |
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| 442 | { |
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| 443 | srcv[0] = i / 255.0f; |
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| 444 | fz_convert_color(ss, srcv, ds, dstv); |
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| 445 | for (k = 0; k < dstn; k++) |
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| 446 | lookup[i * dstn + k] = dstv[k] * 255; |
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| 447 | } |
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| 448 | |||
| 449 | for (y = 0; y < src->h; y++) |
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| 450 | { |
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| 451 | for (x = 0; x < src->w; x++) |
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| 452 | { |
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| 453 | i = *s++; |
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| 454 | for (k = 0; k < dstn; k++) |
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| 455 | *d++ = lookup[i * dstn + k]; |
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| 456 | *d++ = *s++; |
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| 457 | } |
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| 458 | } |
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| 459 | } |
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| 460 | |||
| 461 | /* Memoize colors using a hash table for the general case */ |
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| 462 | else |
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| 463 | { |
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| 464 | fz_hash_table *lookup; |
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| 465 | unsigned char *color; |
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| 466 | |||
| 467 | lookup = fz_new_hash_table(509, srcn); |
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| 468 | |||
| 469 | for (y = 0; y < src->h; y++) |
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| 470 | { |
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| 471 | for (x = 0; x < src->w; x++) |
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| 472 | { |
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| 473 | color = fz_hash_find(lookup, s); |
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| 474 | if (color) |
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| 475 | { |
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| 476 | memcpy(d, color, dstn); |
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| 477 | s += srcn; |
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| 478 | d += dstn; |
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| 479 | *d++ = *s++; |
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| 480 | } |
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| 481 | else |
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| 482 | { |
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| 483 | for (k = 0; k < srcn; k++) |
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| 484 | srcv[k] = *s++ / 255.0f; |
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| 485 | fz_convert_color(ss, srcv, ds, dstv); |
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| 486 | for (k = 0; k < dstn; k++) |
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| 487 | *d++ = dstv[k] * 255; |
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| 488 | |||
| 489 | fz_hash_insert(lookup, s - srcn, d - dstn); |
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| 490 | |||
| 491 | *d++ = *s++; |
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| 492 | } |
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| 493 | } |
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| 494 | } |
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| 495 | |||
| 496 | fz_free_hash(lookup); |
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| 497 | } |
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| 498 | } |
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| 499 | |||
| 500 | void |
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| 501 | fz_convert_pixmap(fz_pixmap *sp, fz_pixmap *dp) |
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| 502 | { |
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| 503 | fz_colorspace *ss = sp->colorspace; |
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| 504 | fz_colorspace *ds = dp->colorspace; |
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| 505 | |||
| 506 | assert(ss && ds); |
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| 507 | |||
| 508 | if (sp->mask) |
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| 509 | dp->mask = fz_keep_pixmap(sp->mask); |
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| 510 | dp->interpolate = sp->interpolate; |
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| 511 | |||
| 512 | if (ss == fz_device_gray) |
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| 513 | { |
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| 514 | if (ds == fz_device_rgb) fast_gray_to_rgb(sp, dp); |
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| 515 | else if (ds == fz_device_bgr) fast_gray_to_rgb(sp, dp); /* bgr == rgb here */ |
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| 516 | else if (ds == fz_device_cmyk) fast_gray_to_cmyk(sp, dp); |
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| 517 | else fz_std_conv_pixmap(sp, dp); |
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| 518 | } |
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| 519 | |||
| 520 | else if (ss == fz_device_rgb) |
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| 521 | { |
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| 522 | if (ds == fz_device_gray) fast_rgb_to_gray(sp, dp); |
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| 523 | else if (ds == fz_device_bgr) fast_rgb_to_bgr(sp, dp); |
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| 524 | else if (ds == fz_device_cmyk) fast_rgb_to_cmyk(sp, dp); |
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| 525 | else fz_std_conv_pixmap(sp, dp); |
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| 526 | } |
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| 527 | |||
| 528 | else if (ss == fz_device_bgr) |
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| 529 | { |
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| 530 | if (ds == fz_device_gray) fast_bgr_to_gray(sp, dp); |
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| 531 | else if (ds == fz_device_rgb) fast_rgb_to_bgr(sp, dp); /* bgr = rgb here */ |
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| 532 | else if (ds == fz_device_cmyk) fast_bgr_to_cmyk(sp, dp); |
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| 533 | else fz_std_conv_pixmap(sp, dp); |
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| 534 | } |
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| 535 | |||
| 536 | else if (ss == fz_device_cmyk) |
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| 537 | { |
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| 538 | if (ds == fz_device_gray) fast_cmyk_to_gray(sp, dp); |
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| 539 | else if (ds == fz_device_bgr) fast_cmyk_to_bgr(sp, dp); |
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| 540 | else if (ds == fz_device_rgb) fast_cmyk_to_rgb(sp, dp); |
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| 541 | else fz_std_conv_pixmap(sp, dp); |
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| 542 | } |
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| 543 | |||
| 544 | else fz_std_conv_pixmap(sp, dp); |
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| 545 | } |
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| 546 | |||
| 547 | /* Convert a single color */ |
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| 548 | |||
| 549 | static void |
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| 550 | fz_std_conv_color(fz_colorspace *srcs, float *srcv, fz_colorspace *dsts, float *dstv) |
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| 551 | { |
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| 552 | float rgb[3]; |
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| 553 | int i; |
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| 554 | |||
| 555 | if (srcs != dsts) |
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| 556 | { |
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| 557 | assert(srcs->to_rgb && dsts->from_rgb); |
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| 558 | srcs->to_rgb(srcs, srcv, rgb); |
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| 559 | dsts->from_rgb(dsts, rgb, dstv); |
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| 560 | for (i = 0; i < dsts->n; i++) |
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| 561 | dstv[i] = CLAMP(dstv[i], 0, 1); |
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| 562 | } |
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| 563 | else |
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| 564 | { |
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| 565 | for (i = 0; i < srcs->n; i++) |
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| 566 | dstv[i] = srcv[i]; |
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| 567 | } |
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| 568 | } |
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| 569 | |||
| 570 | void |
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| 571 | fz_convert_color(fz_colorspace *ss, float *sv, fz_colorspace *ds, float *dv) |
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| 572 | { |
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| 573 | if (ss == fz_device_gray) |
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| 574 | { |
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| 575 | if ((ds == fz_device_rgb) || (ds == fz_device_bgr)) |
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| 576 | { |
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| 577 | dv[0] = sv[0]; |
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| 578 | dv[1] = sv[0]; |
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| 579 | dv[2] = sv[0]; |
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| 580 | } |
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| 581 | else if (ds == fz_device_cmyk) |
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| 582 | { |
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| 583 | dv[0] = 0; |
||
| 584 | dv[1] = 0; |
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| 585 | dv[2] = 0; |
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| 586 | dv[3] = sv[0]; |
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| 587 | } |
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| 588 | else |
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| 589 | fz_std_conv_color(ss, sv, ds, dv); |
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| 590 | } |
||
| 591 | |||
| 592 | else if (ss == fz_device_rgb) |
||
| 593 | { |
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| 594 | if (ds == fz_device_gray) |
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| 595 | { |
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| 596 | dv[0] = sv[0] * 0.3f + sv[1] * 0.59f + sv[2] * 0.11f; |
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| 597 | } |
||
| 598 | else if (ds == fz_device_bgr) |
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| 599 | { |
||
| 600 | dv[0] = sv[2]; |
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| 601 | dv[1] = sv[1]; |
||
| 602 | dv[2] = sv[0]; |
||
| 603 | } |
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| 604 | else if (ds == fz_device_cmyk) |
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| 605 | { |
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| 606 | float c = 1 - sv[0]; |
||
| 607 | float m = 1 - sv[1]; |
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| 608 | float y = 1 - sv[2]; |
||
| 609 | float k = MIN(c, MIN(m, y)); |
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| 610 | dv[0] = c - k; |
||
| 611 | dv[1] = m - k; |
||
| 612 | dv[2] = y - k; |
||
| 613 | dv[3] = k; |
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| 614 | } |
||
| 615 | else |
||
| 616 | fz_std_conv_color(ss, sv, ds, dv); |
||
| 617 | } |
||
| 618 | |||
| 619 | else if (ss == fz_device_bgr) |
||
| 620 | { |
||
| 621 | if (ds == fz_device_gray) |
||
| 622 | { |
||
| 623 | dv[0] = sv[0] * 0.11f + sv[1] * 0.59f + sv[2] * 0.3f; |
||
| 624 | } |
||
| 625 | else if (ds == fz_device_bgr) |
||
| 626 | { |
||
| 627 | dv[0] = sv[2]; |
||
| 628 | dv[1] = sv[1]; |
||
| 629 | dv[2] = sv[0]; |
||
| 630 | } |
||
| 631 | else if (ds == fz_device_cmyk) |
||
| 632 | { |
||
| 633 | float c = 1 - sv[2]; |
||
| 634 | float m = 1 - sv[1]; |
||
| 635 | float y = 1 - sv[0]; |
||
| 636 | float k = MIN(c, MIN(m, y)); |
||
| 637 | dv[0] = c - k; |
||
| 638 | dv[1] = m - k; |
||
| 639 | dv[2] = y - k; |
||
| 640 | dv[3] = k; |
||
| 641 | } |
||
| 642 | else |
||
| 643 | fz_std_conv_color(ss, sv, ds, dv); |
||
| 644 | } |
||
| 645 | |||
| 646 | else if (ss == fz_device_cmyk) |
||
| 647 | { |
||
| 648 | if (ds == fz_device_gray) |
||
| 649 | { |
||
| 650 | float c = sv[0] * 0.3f; |
||
| 651 | float m = sv[1] * 0.59f; |
||
| 652 | float y = sv[2] * 0.11f; |
||
| 653 | dv[0] = 1 - MIN(c + m + y + sv[3], 1); |
||
| 654 | } |
||
| 655 | else if (ds == fz_device_rgb) |
||
| 656 | { |
||
| 657 | #ifdef SLOWCMYK |
||
| 658 | cmyk_to_rgb(NULL, sv, dv); |
||
| 659 | #else |
||
| 660 | dv[0] = 1 - MIN(sv[0] + sv[3], 1); |
||
| 661 | dv[1] = 1 - MIN(sv[1] + sv[3], 1); |
||
| 662 | dv[2] = 1 - MIN(sv[2] + sv[3], 1); |
||
| 663 | #endif |
||
| 664 | } |
||
| 665 | else if (ds == fz_device_bgr) |
||
| 666 | { |
||
| 667 | #ifdef SLOWCMYK |
||
| 668 | float rgb[3]; |
||
| 669 | cmyk_to_rgb(NULL, sv, rgb); |
||
| 670 | dv[0] = rgb[2]; |
||
| 671 | dv[1] = rgb[1]; |
||
| 672 | dv[2] = rgb[0]; |
||
| 673 | #else |
||
| 674 | dv[0] = 1 - MIN(sv[2] + sv[3], 1); |
||
| 675 | dv[1] = 1 - MIN(sv[1] + sv[3], 1); |
||
| 676 | dv[2] = 1 - MIN(sv[0] + sv[3], 1); |
||
| 677 | #endif |
||
| 678 | } |
||
| 679 | else |
||
| 680 | fz_std_conv_color(ss, sv, ds, dv); |
||
| 681 | } |
||
| 682 | |||
| 683 | else |
||
| 684 | fz_std_conv_color(ss, sv, ds, dv); |
||
| 685 | } |