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435a566751
* 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
30 lines
772 B
C
30 lines
772 B
C
/* multiply 8-bit fixpoint (0..1) so that 0*0==0 and 255*255==255 */
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#define fz_mul255(a,b) (((a) * ((b) + 1)) >> 8)
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#define fz_floor(x) floor(x)
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#define fz_ceil(x) ceil(x)
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/* divide and floor towards -inf */
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static inline int fz_idiv(int a, int b)
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{
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return a < 0 ? (a - b + 1) / b : a / b;
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}
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/* from python */
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static inline void fz_idivmod(int x, int y, int *d, int *m)
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{
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int xdivy = x / y;
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int xmody = x - xdivy * y;
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/* If the signs of x and y differ, and the remainder is non-0,
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* C89 doesn't define whether xdivy is now the floor or the
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* ceiling of the infinitely precise quotient. We want the floor,
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* and we have it iff the remainder's sign matches y's.
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*/
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if (xmody && ((y ^ xmody) < 0)) {
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xmody += y;
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xdivy --;
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}
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*d = xdivy;
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*m = xmody;
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}
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