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Diffstat (limited to 'src/gmisc/gmisc_matrix2d.c')
| -rw-r--r-- | src/gmisc/gmisc_matrix2d.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/src/gmisc/gmisc_matrix2d.c b/src/gmisc/gmisc_matrix2d.c new file mode 100644 index 00000000..dd13603e --- /dev/null +++ b/src/gmisc/gmisc_matrix2d.c @@ -0,0 +1,196 @@ +/* + * This file is subject to the terms of the GFX License. If a copy of + * the license was not distributed with this file, you can obtain one at: + * + * http://ugfx.org/license.html + */ + +/** + * @file src/gmisc/gmisc_matrix2d.c + * @brief GMISC 2D matrix operations code. + */ +#include "gfx.h" + +#if GFX_USE_GMISC + +#if GMISC_NEED_MATRIXFLOAT2D + +#if !GMISC_NEED_FASTTRIG + #include <math.h> +#endif + +void gmiscMatrixFloat2DSetIdentity(MatrixFloat2D *m) { + m->a00 = m->a11 = m->a22 = 1.0; + m->a01 = m->a02 = m->a10 = m->a12 = m->a20 = m->a21 = 0.0; +} + +void gmiscMatrixFloat2DMultiply(MatrixFloat2D *dst, const MatrixFloat2D *src1, const MatrixFloat2D *src2) { + dst->a00 = src1->a00*src2->a00 + src1->a01*src2->a10 + src1->a02*src2->a20; + dst->a01 = src1->a00*src2->a01 + src1->a01*src2->a11 + src1->a02*src2->a21; + dst->a02 = src1->a00*src2->a02 + src1->a01*src2->a12 + src1->a02*src2->a22; + dst->a10 = src1->a10*src2->a00 + src1->a11*src2->a10 + src1->a12*src2->a20; + dst->a11 = src1->a10*src2->a01 + src1->a11*src2->a11 + src1->a12*src2->a21; + dst->a12 = src1->a10*src2->a02 + src1->a11*src2->a12 + src1->a12*src2->a22; + dst->a20 = src1->a20*src2->a00 + src1->a21*src2->a10 + src1->a22*src2->a20; + dst->a21 = src1->a20*src2->a01 + src1->a21*src2->a11 + src1->a22*src2->a21; + dst->a22 = src1->a20*src2->a02 + src1->a21*src2->a12 + src1->a22*src2->a22; +} + +void gmiscMatrixFloat2DApplyTranslation(MatrixFloat2D *dst, const MatrixFloat2D *src, float tx, float ty) { + if (src) { + dst->a00 = src->a00; dst->a01 = src->a01; dst->a02 = src->a02+tx; + dst->a10 = src->a10; dst->a11 = src->a11; dst->a12 = src->a12+ty; + dst->a20 = src->a20; dst->a21 = src->a21; dst->a22 = src->a22; + } else { + dst->a00 = 1.0; dst->a01 = 0.0; dst->a02 = tx; + dst->a10 = 0.0; dst->a11 = 1.0; dst->a12 = ty; + dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0; + } +} + +void gmiscMatrixFloat2DApplyScale(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy) { + if (src) { + dst->a00 = src->a00*sx; dst->a01 = src->a01*sy; dst->a02 = src->a02; + dst->a10 = src->a10*sx; dst->a11 = src->a11*sy; dst->a12 = src->a12; + dst->a20 = src->a20*sx; dst->a21 = src->a21*sy; dst->a22 = src->a22; + } else { + dst->a00 = sx; dst->a01 = 0.0; dst->a02 = 0.0; + dst->a10 = 0.0; dst->a11 = sy; dst->a12 = 0.0; + dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0; + } +} + +void gmiscMatrixFloat2DApplyShear(MatrixFloat2D *dst, const MatrixFloat2D *src, float sx, float sy) { + if (src) { + dst->a00 = src->a00 + src->a01*sy; dst->a01 = src->a00*sx + src->a01; dst->a02 = src->a02; + dst->a10 = src->a10 + src->a11*sy; dst->a11 = src->a10*sx + src->a11; dst->a12 = src->a12; + dst->a20 = src->a20 + src->a21*sy; dst->a21 = src->a20*sx + src->a21; dst->a22 = src->a22; + } else { + dst->a00 = 1.0; dst->a01 = sx; dst->a02 = 0.0; + dst->a10 = sy; dst->a11 = 1.0; dst->a12 = 0.0; + dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0; + } +} + +void gmiscMatrixFloat2DApplyRotation(MatrixFloat2D *dst, const MatrixFloat2D *src, int angle) { + float s, c; + + #if GMISC_NEED_FASTTRIG + s = fsin(angle); + c = fcos(angle); + #else + c = angle*M_PI/180; + s = sin(c); + c = cos(c); + #endif + + if (src) { + dst->a00 = src->a00*c - src->a01*s; dst->a01 = src->a00*s + src->a01*c; dst->a02 = src->a02; + dst->a10 = src->a10*c - src->a11*s; dst->a11 = src->a10*s + src->a11*c; dst->a12 = src->a12; + dst->a20 = src->a20*c - src->a21*s; dst->a21 = src->a20*s + src->a21*c; dst->a22 = src->a22; + } else { + dst->a00 = c; dst->a01 = s; dst->a02 = 0.0; + dst->a10 = -s; dst->a11 = c; dst->a12 = 0.0; + dst->a20 = 0.0; dst->a21 = 0.0; dst->a22 = 1.0; + } +} + +void gmiscMatrixFloat2DApplyToPoints(point *dst, const point *src, const MatrixFloat2D *m, int cnt) { + float x; + + for( ;cnt--; dst++, src++) { + x = src->x; // This allows in-place operation + dst->x = round(x*m->a00+src->y*m->a01+m->a02); + dst->y = round(x*m->a10+src->y*m->a11+m->a12); + } +} + +#endif // GMISC_NEED_MATRIXFLOAT2D + +#if GMISC_NEED_MATRIXFIXED2D + +void gmiscMatrixFixed2DSetIdentity(MatrixFixed2D *m) { + m->a00 = m->a11 = m->a22 = FIXED(1); + m->a01 = m->a02 = m->a10 = m->a12 = m->a20 = m->a21 = 0; +} + +void gmiscMatrixFixed2DMultiply(MatrixFixed2D *dst, const MatrixFixed2D *src1, const MatrixFixed2D *src2) { + dst->a00 = FIXEDMUL(src1->a00,src2->a00) + FIXEDMUL(src1->a01,src2->a10) + FIXEDMUL(src1->a02,src2->a20); + dst->a01 = FIXEDMUL(src1->a00,src2->a01) + FIXEDMUL(src1->a01,src2->a11) + FIXEDMUL(src1->a02,src2->a21); + dst->a02 = FIXEDMUL(src1->a00,src2->a02) + FIXEDMUL(src1->a01,src2->a12) + FIXEDMUL(src1->a02,src2->a22); + dst->a10 = FIXEDMUL(src1->a10,src2->a00) + FIXEDMUL(src1->a11,src2->a10) + FIXEDMUL(src1->a12,src2->a20); + dst->a11 = FIXEDMUL(src1->a10,src2->a01) + FIXEDMUL(src1->a11,src2->a11) + FIXEDMUL(src1->a12,src2->a21); + dst->a12 = FIXEDMUL(src1->a10,src2->a02) + FIXEDMUL(src1->a11,src2->a12) + FIXEDMUL(src1->a12,src2->a22); + dst->a20 = FIXEDMUL(src1->a20,src2->a00) + FIXEDMUL(src1->a21,src2->a10) + FIXEDMUL(src1->a22,src2->a20); + dst->a21 = FIXEDMUL(src1->a20,src2->a01) + FIXEDMUL(src1->a21,src2->a11) + FIXEDMUL(src1->a22,src2->a21); + dst->a22 = FIXEDMUL(src1->a20,src2->a02) + FIXEDMUL(src1->a21,src2->a12) + FIXEDMUL(src1->a22,src2->a22); +} + +void gmiscMatrixFixed2DApplyTranslation(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed tx, fixed ty) { + if (src) { + dst->a00 = src->a00; dst->a01 = src->a01; dst->a02 = src->a02+tx; + dst->a10 = src->a10; dst->a11 = src->a11; dst->a12 = src->a12+ty; + dst->a20 = src->a20; dst->a21 = src->a21; dst->a22 = src->a22; + } else { + dst->a00 = FIXED(1); dst->a01 = 0; dst->a02 = tx; + dst->a10 = 0; dst->a11 = FIXED(1); dst->a12 = ty; + dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1); + } +} + +void gmiscMatrixFixed2DApplyScale(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy) { + if (src) { + dst->a00 = FIXEDMUL(sx,src->a00); dst->a01 = FIXEDMUL(sy,src->a01); dst->a02 = src->a02; + dst->a10 = FIXEDMUL(sx,src->a10); dst->a11 = FIXEDMUL(sy,src->a11); dst->a12 = src->a12; + dst->a20 = FIXEDMUL(sx,src->a20); dst->a21 = FIXEDMUL(sy,src->a21); dst->a22 = src->a22; + } else { + dst->a00 = sx; dst->a01 = 0; dst->a02 = 0; + dst->a10 = 0; dst->a11 = sy; dst->a12 = 0; + dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1); + } +} + +void gmiscMatrixFixed2DApplyShear(MatrixFixed2D *dst, const MatrixFixed2D *src, fixed sx, fixed sy) { + if (src) { + dst->a00 = src->a00 + FIXEDMUL(sy,src->a01); dst->a01 = FIXEDMUL(sx,src->a00) + src->a01; dst->a02 = src->a02; + dst->a10 = src->a10 + FIXEDMUL(sy,src->a11); dst->a11 = FIXEDMUL(sx,src->a10) + src->a11; dst->a12 = src->a12; + dst->a20 = src->a20 + FIXEDMUL(sy,src->a21); dst->a21 = FIXEDMUL(sx,src->a20) + src->a21; dst->a22 = src->a22; + } else { + dst->a00 = FIXED(1); dst->a01 = sx; dst->a02 = 0; + dst->a10 = sy; dst->a11 = FIXED(1); dst->a12 = 0; + dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1); + } +} + +#if GMISC_NEED_FIXEDTRIG + void gmiscMatrixFixed2DApplyRotation(MatrixFixed2D *dst, const MatrixFixed2D *src, int angle) { + fixed s, c; + + s = ffsin(angle); + c = ffcos(angle); + + if (src) { + dst->a00 = FIXEDMUL(c,src->a00) - FIXEDMUL(s,src->a01); dst->a01 = FIXEDMUL(s,src->a00) + FIXEDMUL(c,src->a01); dst->a02 = src->a02; + dst->a10 = FIXEDMUL(c,src->a10) - FIXEDMUL(s,src->a11); dst->a11 = FIXEDMUL(s,src->a10) + FIXEDMUL(c,src->a11); dst->a12 = src->a12; + dst->a20 = FIXEDMUL(c,src->a20) - FIXEDMUL(s,src->a21); dst->a21 = FIXEDMUL(s,src->a20) + FIXEDMUL(c,src->a21); dst->a22 = src->a22; + } else { + dst->a00 = c; dst->a01 = s; dst->a02 = 0; + dst->a10 = -s; dst->a11 = c; dst->a12 = 0; + dst->a20 = 0; dst->a21 = 0; dst->a22 = FIXED(1); + } + } +#endif + +void gmiscMatrixFixed2DApplyToPoints(point *dst, const point *src, const MatrixFixed2D *m, int cnt) { + coord_t x; + + for( ;cnt--; dst++, src++) { + x = src->x; // This allows in-place operation + dst->x = NONFIXED(x*m->a00+src->y*m->a01+m->a02+FIXED0_5); + dst->y = NONFIXED(x*m->a10+src->y*m->a11+m->a12+FIXED0_5); + } +} + +#endif // GMISC_NEED_MATRIXFIXED2D + +#endif // GFX_USE_GMISC |