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![Klemens Friedl](/assets/img/avatar_default.png)
* sumatrapdf - vendor import * everything compiles (libjpeg, poppler, fitz, sumatrapdf) * does NOT link (remove the comment tags in the parent directory.rbuild file (rosapps dir) to build it) svn path=/trunk/; revision=29295
126 lines
1.7 KiB
C
126 lines
1.7 KiB
C
/* common bit magic */
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static inline void
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printbits(FILE *f, int code, int nbits)
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{
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int n, b;
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for (n = nbits - 1; n >= 0; n--)
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{
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b = (code >> n) & 1;
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fprintf(f, "%c", b ? '1' : '0');
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}
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}
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static inline int
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getbit(const unsigned char *buf, int x)
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{
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return ( buf[x >> 3] >> ( 7 - (x & 7) ) ) & 1;
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}
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static inline void
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printline(FILE *f, unsigned char *line, int w)
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{
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int i;
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for (i = 0; i < w; i++)
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fprintf(f, "%c", getbit(line, i) ? '#' : '.');
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fprintf(f, "\n");
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}
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static inline int
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getrun(const unsigned char *line, int x, int w, int c)
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{
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int z;
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int b;
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if (x < 0)
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x = 0;
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z = x;
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while (z < w)
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{
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b = getbit(line, z);
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if (c != b)
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break;
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z ++;
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}
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return z - x;
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}
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static inline int
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findchanging(const unsigned char *line, int x, int w)
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{
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int a, b;
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if (line == 0)
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return w;
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if (x == -1)
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{
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a = 0;
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x = 0;
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}
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else
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{
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a = getbit(line, x);
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x++;
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}
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while (x < w)
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{
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b = getbit(line, x);
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if (a != b)
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break;
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x++;
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}
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return x;
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}
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static inline int
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findchangingcolor(const unsigned char *line, int x, int w, int color)
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{
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if (line == 0)
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return w;
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x = findchanging(line, x, w);
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if (x < w && getbit(line, x) != color)
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x = findchanging(line, x, w);
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return x;
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}
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static const unsigned char lm[8] =
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{ 0xFF, 0x7F, 0x3F, 0x1F, 0x0F, 0x07, 0x03, 0x01 };
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static const unsigned char rm[8] =
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{ 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFE };
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static inline void
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setbits(unsigned char *line, int x0, int x1)
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{
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int a0, a1, b0, b1, a;
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a0 = x0 >> 3;
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a1 = x1 >> 3;
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b0 = x0 & 7;
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b1 = x1 & 7;
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if (a0 == a1)
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{
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if (b1)
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line[a0] |= lm[b0] & rm[b1];
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}
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else
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{
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line[a0] |= lm[b0];
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for (a = a0 + 1; a < a1; a++)
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line[a] = 0xFF;
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if (b1)
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line[a1] |= rm[b1];
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}
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}
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