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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4680 | right-hear | 1 | #include "fitz.h" |
| 2 | |||
| 3 | static int fz_memory_limit = 256 << 20; |
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| 4 | static int fz_memory_used = 0; |
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| 5 | |||
| 6 | fz_pixmap * |
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| 7 | fz_new_pixmap_with_data(fz_colorspace *colorspace, int w, int h, unsigned char *samples) |
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| 8 | { |
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| 9 | fz_pixmap *pix; |
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| 10 | |||
| 11 | pix = fz_malloc(sizeof(fz_pixmap)); |
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| 12 | pix->refs = 1; |
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| 13 | pix->x = 0; |
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| 14 | pix->y = 0; |
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| 15 | pix->w = w; |
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| 16 | pix->h = h; |
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| 17 | pix->mask = NULL; |
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| 18 | pix->interpolate = 1; |
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| 19 | pix->xres = 96; |
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| 20 | pix->yres = 96; |
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| 21 | pix->colorspace = NULL; |
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| 22 | pix->n = 1; |
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| 23 | |||
| 24 | if (colorspace) |
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| 25 | { |
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| 26 | pix->colorspace = fz_keep_colorspace(colorspace); |
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| 27 | pix->n = 1 + colorspace->n; |
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| 28 | } |
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| 29 | |||
| 30 | if (samples) |
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| 31 | { |
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| 32 | pix->samples = samples; |
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| 33 | pix->free_samples = 0; |
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| 34 | } |
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| 35 | else |
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| 36 | { |
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| 37 | fz_memory_used += pix->w * pix->h * pix->n; |
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| 38 | pix->samples = fz_calloc(pix->h, pix->w * pix->n); |
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| 39 | pix->free_samples = 1; |
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| 40 | } |
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| 41 | |||
| 42 | return pix; |
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| 43 | } |
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| 44 | |||
| 45 | fz_pixmap * |
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| 46 | fz_new_pixmap_with_limit(fz_colorspace *colorspace, int w, int h) |
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| 47 | { |
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| 48 | int n = colorspace ? colorspace->n + 1 : 1; |
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| 49 | int size = w * h * n; |
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| 50 | if (fz_memory_used + size > fz_memory_limit) |
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| 51 | { |
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| 52 | fz_warn("pixmap memory exceeds soft limit %dM + %dM > %dM", |
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| 53 | fz_memory_used/(1<<20), size/(1<<20), fz_memory_limit/(1<<20)); |
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| 54 | return NULL; |
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| 55 | } |
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| 56 | return fz_new_pixmap_with_data(colorspace, w, h, NULL); |
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| 57 | } |
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| 58 | |||
| 59 | fz_pixmap * |
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| 60 | fz_new_pixmap(fz_colorspace *colorspace, int w, int h) |
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| 61 | { |
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| 62 | return fz_new_pixmap_with_data(colorspace, w, h, NULL); |
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| 63 | } |
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| 64 | |||
| 65 | fz_pixmap * |
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| 66 | fz_new_pixmap_with_rect(fz_colorspace *colorspace, fz_bbox r) |
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| 67 | { |
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| 68 | fz_pixmap *pixmap; |
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| 69 | pixmap = fz_new_pixmap(colorspace, r.x1 - r.x0, r.y1 - r.y0); |
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| 70 | pixmap->x = r.x0; |
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| 71 | pixmap->y = r.y0; |
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| 72 | return pixmap; |
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| 73 | } |
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| 74 | |||
| 75 | fz_pixmap * |
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| 76 | fz_new_pixmap_with_rect_and_data(fz_colorspace *colorspace, fz_bbox r, unsigned char *samples) |
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| 77 | { |
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| 78 | fz_pixmap *pixmap; |
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| 79 | pixmap = fz_new_pixmap_with_data(colorspace, r.x1 - r.x0, r.y1 - r.y0, samples); |
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| 80 | pixmap->x = r.x0; |
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| 81 | pixmap->y = r.y0; |
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| 82 | return pixmap; |
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| 83 | } |
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| 84 | |||
| 85 | fz_pixmap * |
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| 86 | fz_keep_pixmap(fz_pixmap *pix) |
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| 87 | { |
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| 88 | pix->refs++; |
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| 89 | return pix; |
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| 90 | } |
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| 91 | |||
| 92 | void |
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| 93 | fz_drop_pixmap(fz_pixmap *pix) |
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| 94 | { |
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| 95 | if (pix && --pix->refs == 0) |
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| 96 | { |
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| 97 | fz_memory_used -= pix->w * pix->h * pix->n; |
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| 98 | if (pix->mask) |
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| 99 | fz_drop_pixmap(pix->mask); |
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| 100 | if (pix->colorspace) |
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| 101 | fz_drop_colorspace(pix->colorspace); |
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| 102 | if (pix->free_samples) |
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| 103 | fz_free(pix->samples); |
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| 104 | fz_free(pix); |
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| 105 | } |
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| 106 | } |
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| 107 | |||
| 108 | fz_bbox |
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| 109 | fz_bound_pixmap(fz_pixmap *pix) |
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| 110 | { |
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| 111 | fz_bbox bbox; |
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| 112 | bbox.x0 = pix->x; |
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| 113 | bbox.y0 = pix->y; |
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| 114 | bbox.x1 = pix->x + pix->w; |
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| 115 | bbox.y1 = pix->y + pix->h; |
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| 116 | return bbox; |
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| 117 | } |
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| 118 | |||
| 119 | void |
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| 120 | fz_clear_pixmap(fz_pixmap *pix) |
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| 121 | { |
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| 122 | memset(pix->samples, 0, pix->w * pix->h * pix->n); |
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| 123 | } |
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| 124 | |||
| 125 | void |
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| 126 | fz_clear_pixmap_with_color(fz_pixmap *pix, int value) |
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| 127 | { |
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| 128 | if (value == 255) |
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| 129 | memset(pix->samples, 255, pix->w * pix->h * pix->n); |
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| 130 | else |
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| 131 | { |
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| 132 | int k, x, y; |
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| 133 | unsigned char *s = pix->samples; |
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| 134 | for (y = 0; y < pix->h; y++) |
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| 135 | { |
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| 136 | for (x = 0; x < pix->w; x++) |
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| 137 | { |
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| 138 | for (k = 0; k < pix->n - 1; k++) |
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| 139 | *s++ = value; |
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| 140 | *s++ = 255; |
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| 141 | } |
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| 142 | } |
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| 143 | } |
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| 144 | } |
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| 145 | |||
| 146 | void |
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| 147 | fz_copy_pixmap_rect(fz_pixmap *dest, fz_pixmap *src, fz_bbox r) |
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| 148 | { |
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| 149 | const unsigned char *srcp; |
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| 150 | unsigned char *destp; |
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| 151 | int y, w, destspan, srcspan; |
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| 152 | |||
| 153 | r = fz_intersect_bbox(r, fz_bound_pixmap(dest)); |
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| 154 | r = fz_intersect_bbox(r, fz_bound_pixmap(src)); |
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| 155 | w = r.x1 - r.x0; |
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| 156 | y = r.y1 - r.y0; |
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| 157 | if (w <= 0 || y <= 0) |
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| 158 | return; |
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| 159 | |||
| 160 | w *= src->n; |
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| 161 | srcspan = src->w * src->n; |
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| 162 | srcp = src->samples + srcspan * (r.y0 - src->y) + src->n * (r.x0 - src->x); |
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| 163 | destspan = dest->w * dest->n; |
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| 164 | destp = dest->samples + destspan * (r.y0 - dest->y) + dest->n * (r.x0 - dest->x); |
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| 165 | do |
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| 166 | { |
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| 167 | memcpy(destp, srcp, w); |
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| 168 | srcp += srcspan; |
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| 169 | destp += destspan; |
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| 170 | } |
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| 171 | while (--y); |
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| 172 | } |
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| 173 | |||
| 174 | void |
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| 175 | fz_clear_pixmap_rect_with_color(fz_pixmap *dest, int value, fz_bbox r) |
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| 176 | { |
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| 177 | unsigned char *destp; |
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| 178 | int x, y, w, k, destspan; |
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| 179 | |||
| 180 | r = fz_intersect_bbox(r, fz_bound_pixmap(dest)); |
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| 181 | w = r.x1 - r.x0; |
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| 182 | y = r.y1 - r.y0; |
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| 183 | if (w <= 0 || y <= 0) |
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| 184 | return; |
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| 185 | |||
| 186 | destspan = dest->w * dest->n; |
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| 187 | destp = dest->samples + destspan * (r.y0 - dest->y) + dest->n * (r.x0 - dest->x); |
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| 188 | if (value == 255) |
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| 189 | do |
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| 190 | { |
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| 191 | memset(destp, 255, w * dest->n); |
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| 192 | destp += destspan; |
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| 193 | } |
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| 194 | while (--y); |
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| 195 | else |
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| 196 | do |
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| 197 | { |
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| 198 | unsigned char *s = destp; |
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| 199 | for (x = 0; x < w; x++) |
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| 200 | { |
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| 201 | for (k = 0; k < dest->n - 1; k++) |
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| 202 | *s++ = value; |
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| 203 | *s++ = 255; |
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| 204 | } |
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| 205 | destp += destspan; |
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| 206 | } |
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| 207 | while (--y); |
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| 208 | } |
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| 209 | |||
| 210 | void |
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| 211 | fz_premultiply_pixmap(fz_pixmap *pix) |
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| 212 | { |
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| 213 | unsigned char *s = pix->samples; |
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| 214 | unsigned char a; |
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| 215 | int k, x, y; |
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| 216 | |||
| 217 | for (y = 0; y < pix->h; y++) |
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| 218 | { |
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| 219 | for (x = 0; x < pix->w; x++) |
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| 220 | { |
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| 221 | a = s[pix->n - 1]; |
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| 222 | for (k = 0; k < pix->n - 1; k++) |
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| 223 | s[k] = fz_mul255(s[k], a); |
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| 224 | s += pix->n; |
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| 225 | } |
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| 226 | } |
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| 227 | } |
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| 228 | |||
| 229 | fz_pixmap * |
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| 230 | fz_alpha_from_gray(fz_pixmap *gray, int luminosity) |
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| 231 | { |
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| 232 | fz_pixmap *alpha; |
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| 233 | unsigned char *sp, *dp; |
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| 234 | int len; |
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| 235 | |||
| 236 | assert(gray->n == 2); |
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| 237 | |||
| 238 | alpha = fz_new_pixmap_with_rect(NULL, fz_bound_pixmap(gray)); |
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| 239 | dp = alpha->samples; |
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| 240 | sp = gray->samples; |
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| 241 | if (!luminosity) |
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| 242 | sp ++; |
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| 243 | |||
| 244 | len = gray->w * gray->h; |
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| 245 | while (len--) |
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| 246 | { |
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| 247 | *dp++ = sp[0]; |
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| 248 | sp += 2; |
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| 249 | } |
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| 250 | |||
| 251 | return alpha; |
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| 252 | } |
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| 253 | |||
| 254 | void |
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| 255 | fz_invert_pixmap(fz_pixmap *pix) |
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| 256 | { |
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| 257 | unsigned char *s = pix->samples; |
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| 258 | int k, x, y; |
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| 259 | |||
| 260 | for (y = 0; y < pix->h; y++) |
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| 261 | { |
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| 262 | for (x = 0; x < pix->w; x++) |
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| 263 | { |
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| 264 | for (k = 0; k < pix->n - 1; k++) |
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| 265 | s[k] = 255 - s[k]; |
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| 266 | s += pix->n; |
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| 267 | } |
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| 268 | } |
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| 269 | } |
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| 270 | |||
| 271 | void |
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| 272 | fz_gamma_pixmap(fz_pixmap *pix, float gamma) |
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| 273 | { |
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| 274 | unsigned char gamma_map[256]; |
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| 275 | unsigned char *s = pix->samples; |
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| 276 | int k, x, y; |
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| 277 | |||
| 278 | for (k = 0; k < 256; k++) |
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| 279 | gamma_map[k] = pow(k / 255.0f, gamma) * 255; |
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| 280 | |||
| 281 | for (y = 0; y < pix->h; y++) |
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| 282 | { |
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| 283 | for (x = 0; x < pix->w; x++) |
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| 284 | { |
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| 285 | for (k = 0; k < pix->n - 1; k++) |
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| 286 | s[k] = gamma_map[s[k]]; |
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| 287 |