diff options
Diffstat (limited to 'src/3rdparty/freetype/src/tools/test_trig.c')
| -rw-r--r-- | src/3rdparty/freetype/src/tools/test_trig.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/src/3rdparty/freetype/src/tools/test_trig.c b/src/3rdparty/freetype/src/tools/test_trig.c deleted file mode 100644 index 8c8a544aa..000000000 --- a/src/3rdparty/freetype/src/tools/test_trig.c +++ /dev/null @@ -1,236 +0,0 @@ -#include <ft2build.h> -#include FT_FREETYPE_H -#include FT_TRIGONOMETRY_H - -#include <math.h> -#include <stdio.h> - -#define PI 3.14159265358979323846 -#define SPI (PI/FT_ANGLE_PI) - -/* the precision in 16.16 fixed float points of the checks. Expect */ -/* between 2 and 5 noise LSB bits during operations, due to */ -/* rounding errors.. */ -#define THRESHOLD 64 - - static error = 0; - - static void - test_cos( void ) - { - FT_Fixed f1, f2; - double d1, d2; - int i; - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - f1 = FT_Cos(i); - d1 = f1/65536.0; - d2 = cos( i*SPI ); - f2 = (FT_Fixed)(d2*65536.0); - - if ( abs( f2-f1 ) > THRESHOLD ) - { - error = 1; - printf( "FT_Cos[%3d] = %.7f cos[%3d] = %.7f\n", - (i >> 16), f1/65536.0, (i >> 16), d2 ); - } - } - } - - - - static void - test_sin( void ) - { - FT_Fixed f1, f2; - double d1, d2; - int i; - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - f1 = FT_Sin(i); - d1 = f1/65536.0; - d2 = sin( i*SPI ); - f2 = (FT_Fixed)(d2*65536.0); - - if ( abs( f2-f1 ) > THRESHOLD ) - { - error = 1; - printf( "FT_Sin[%3d] = %.7f sin[%3d] = %.7f\n", - (i >> 16), f1/65536.0, (i >> 16), d2 ); - } - } - } - - - static void - test_tan( void ) - { - FT_Fixed f1, f2; - double d1, d2; - int i; - - for ( i = 0; i < FT_ANGLE_PI2-0x2000000; i += 0x10000 ) - { - f1 = FT_Tan(i); - d1 = f1/65536.0; - d2 = tan( i*SPI ); - f2 = (FT_Fixed)(d2*65536.0); - - if ( abs( f2-f1 ) > THRESHOLD ) - { - error = 1; - printf( "FT_Tan[%3d] = %.7f tan[%3d] = %.7f\n", - (i >> 16), f1/65536.0, (i >> 16), d2 ); - } - } - } - - - static void - test_atan2( void ) - { - FT_Fixed c2, s2; - double l, a, c1, s1; - int i, j; - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - l = 5.0; - a = i*SPI; - - c1 = l * cos(a); - s1 = l * sin(a); - - c2 = (FT_Fixed)(c1*65536.0); - s2 = (FT_Fixed)(s1*65536.0); - - j = FT_Atan2( c2, s2 ); - if ( j < 0 ) - j += FT_ANGLE_2PI; - - if ( abs( i - j ) > 1 ) - { - printf( "FT_Atan2( %.7f, %.7f ) = %.5f, atan = %.5f\n", - c2/65536.0, s2/65536.0, j/65536.0, i/65536.0 ); - } - } - } - - static void - test_unit( void ) - { - FT_Vector v; - double a, c1, s1; - FT_Fixed c2, s2; - int i; - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - FT_Vector_Unit( &v, i ); - a = ( i*SPI ); - c1 = cos(a); - s1 = sin(a); - c2 = (FT_Fixed)(c1*65536.0); - s2 = (FT_Fixed)(s1*65536.0); - - if ( abs( v.x-c2 ) > THRESHOLD || - abs( v.y-s2 ) > THRESHOLD ) - { - error = 1; - printf( "FT_Vector_Unit[%3d] = ( %.7f, %.7f ) vec = ( %.7f, %.7f )\n", - (i >> 16), - v.x/65536.0, v.y/65536.0, - c1, s1 ); - } - } - } - - - static void - test_length( void ) - { - FT_Vector v; - FT_Fixed l, l2; - int i; - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - l = (FT_Fixed)(500.0*65536.0); - v.x = (FT_Fixed)( l * cos( i*SPI ) ); - v.y = (FT_Fixed)( l * sin( i*SPI ) ); - l2 = FT_Vector_Length( &v ); - - if ( abs( l2-l ) > THRESHOLD ) - { - error = 1; - printf( "FT_Length( %.7f, %.7f ) = %.5f, length = %.5f\n", - v.x/65536.0, v.y/65536.0, l2/65536.0, l/65536.0 ); - } - } - } - - - static void - test_rotate( void ) - { - FT_Fixed c2, s2, c4, s4; - FT_Vector v; - double l, ra, a, c1, s1, cra, sra, c3, s3; - int i, j, rotate; - - for ( rotate = 0; rotate < FT_ANGLE_2PI; rotate += 0x10000 ) - { - ra = rotate*SPI; - cra = cos( ra ); - sra = sin( ra ); - - for ( i = 0; i < FT_ANGLE_2PI; i += 0x10000 ) - { - l = 500.0; - a = i*SPI; - - c1 = l * cos(a); - s1 = l * sin(a); - - v.x = c2 = (FT_Fixed)(c1*65536.0); - v.y = s2 = (FT_Fixed)(s1*65536.0); - - FT_Vector_Rotate( &v, rotate ); - - c3 = c1 * cra - s1 * sra; - s3 = c1 * sra + s1 * cra; - - c4 = (FT_Fixed)(c3*65536.0); - s4 = (FT_Fixed)(s3*65536.0); - - if ( abs( c4 - v.x ) > THRESHOLD || - abs( s4 - v.y ) > THRESHOLD ) - { - error = 1; - printf( "FT_Rotate( (%.7f,%.7f), %.5f ) = ( %.7f, %.7f ), rot = ( %.7f, %.7f )\n", - c1, s1, ra, - c2/65536.0, s2/65536.0, - c4/65536.0, s4/65536.0 ); - } - } - } - } - - - int main( void ) - { - test_cos(); - test_sin(); - test_tan(); - test_atan2(); - test_unit(); - test_length(); - test_rotate(); - - if (!error) - printf( "trigonometry test ok !\n" ); - - return !error; - } |