diff options
author | Tor Andersson <tor@ghostscript.com> | 2005-03-30 08:30:22 +0200 |
---|---|---|
committer | Tor Andersson <tor@ghostscript.com> | 2005-03-30 08:30:22 +0200 |
commit | ee154f16bd09a43359967f7e7b86c3677c09461d (patch) | |
tree | 08896cfa9ff55e05bfe7855965c620d45115d4d5 /base/matrix.c | |
parent | 460ad7040d67a4a93a153f98095ff952a2b15d37 (diff) | |
download | mupdf-ee154f16bd09a43359967f7e7b86c3677c09461d.tar.xz |
rename part 1 -- files
Diffstat (limited to 'base/matrix.c')
-rw-r--r-- | base/matrix.c | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/base/matrix.c b/base/matrix.c deleted file mode 100644 index 7d7097c4..00000000 --- a/base/matrix.c +++ /dev/null @@ -1,151 +0,0 @@ -#include <fitz.h> - -void fz_invert3x3(float *dst, float *m) -{ - float det; - int i; - -#define M3(m,i,j) (m)[3*i+j] -#define D2(a,b,c,d) (a * d - b * c) -#define D3(a1,a2,a3,b1,b2,b3,c1,c2,c3) \ - (a1 * D2(b2,b3,c2,c3)) - \ - (b1 * D2(a2,a3,c2,c3)) + \ - (c1 * D2(a2,a3,b2,b3)) - - det = D3(M3(m,0,0), M3(m,1,0), M3(m,2,0), - M3(m,0,1), M3(m,1,1), M3(m,2,1), - M3(m,0,2), M3(m,1,2), M3(m,2,2)); - if (det == 0) - det = 1.0; - det = 1.0 / det; - - M3(dst,0,0) = M3(m,1,1) * M3(m,2,2) - M3(m,1,2) * M3(m,2,1); - M3(dst,0,1) = -M3(m,0,1) * M3(m,2,2) + M3(m,0,2) * M3(m,2,1); - M3(dst,0,2) = M3(m,0,1) * M3(m,1,2) - M3(m,0,2) * M3(m,1,1); - - M3(dst,1,0) = -M3(m,1,0) * M3(m,2,2) + M3(m,1,2) * M3(m,2,0); - M3(dst,1,1) = M3(m,0,0) * M3(m,2,2) - M3(m,0,2) * M3(m,2,0); - M3(dst,1,2) = -M3(m,0,0) * M3(m,1,2) + M3(m,0,2) * M3(m,1,0); - - M3(dst,2,0) = M3(m,1,0) * M3(m,2,1) - M3(m,1,1) * M3(m,2,0); - M3(dst,2,1) = -M3(m,0,0) * M3(m,2,1) + M3(m,0,1) * M3(m,2,0); - M3(dst,2,2) = M3(m,0,0) * M3(m,1,1) - M3(m,0,1) * M3(m,1,0); - - for (i = 0; i < 9; i++) - dst[i] *= det; -} - -fz_matrix -fz_concat(fz_matrix one, fz_matrix two) -{ - fz_matrix dst; - dst.a = one.a * two.a + one.b * two.c; - dst.b = one.a * two.b + one.b * two.d; - dst.c = one.c * two.a + one.d * two.c; - dst.d = one.c * two.b + one.d * two.d; - dst.e = one.e * two.a + one.f * two.c + two.e; - dst.f = one.e * two.b + one.f * two.d + two.f; - return dst; -} - -fz_matrix -fz_identity(void) -{ - fz_matrix m; - m.a = 1; m.b = 0; - m.c = 0; m.d = 1; - m.e = 0; m.f = 0; - return m; -} - -fz_matrix -fz_scale(float sx, float sy) -{ - fz_matrix m; - m.a = sx; m.b = 0; - m.c = 0; m.d = sy; - m.e = 0; m.f = 0; - return m; -} - -fz_matrix -fz_rotate(float theta) -{ - fz_matrix m; - float s = sin(theta * M_PI / 180.0); - float c = cos(theta * M_PI / 180.0); - m.a = c; m.b = s; - m.c = -s; m.d = c; - m.e = 0; m.f = 0; - return m; -} - -fz_matrix -fz_translate(float tx, float ty) -{ - fz_matrix m; - m.a = 1; m.b = 0; - m.c = 0; m.d = 1; - m.e = tx; m.f = ty; - return m; -} - -fz_matrix -fz_invertmatrix(fz_matrix src) -{ - fz_matrix dst; - float rdet = 1.0 / (src.a * src.d - src.b * src.c); - dst.a = src.d * rdet; - dst.b = -src.b * rdet; - dst.c = -src.c * rdet; - dst.d = src.a * rdet; - dst.e = -src.e * dst.a - src.f * dst.c; - dst.f = -src.e * dst.b - src.f * dst.d; - return dst; -} - -int -fz_isrectilinear(fz_matrix m) -{ - return (fabs(m.b) < FLT_EPSILON && fabs(m.c) < FLT_EPSILON) || - (fabs(m.a) < FLT_EPSILON && fabs(m.d) < FLT_EPSILON); -} - -float -fz_matrixexpansion(fz_matrix m) -{ - return sqrt(fabs(m.a * m.d - m.b * m.c)); -} - -fz_point -fz_transformpoint(fz_matrix m, fz_point p) -{ - fz_point t; - t.x = p.x * m.a + p.y * m.c + m.e; - t.y = p.x * m.b + p.y * m.d + m.f; - return t; -} - -fz_rect -fz_transformaabb(fz_matrix m, fz_rect r) -{ - fz_point s, t, u, v; - - if (fz_isinfiniterect(r)) - return r; - - s.x = r.min.x; s.y = r.min.y; - t.x = r.min.x; t.y = r.max.y; - u.x = r.max.x; u.y = r.max.y; - v.x = r.max.x; v.y = r.min.y; - s = fz_transformpoint(m, s); - t = fz_transformpoint(m, t); - u = fz_transformpoint(m, u); - v = fz_transformpoint(m, v); - r.min.x = MIN4(s.x, t.x, u.x, v.x); - r.min.y = MIN4(s.y, t.y, u.y, v.y); - r.max.x = MAX4(s.x, t.x, u.x, v.x); - r.max.y = MAX4(s.y, t.y, u.y, v.y); - return r; -} - |