/* only supports RGBA nodes now */ static void node_composit_exec_rotate(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out) { if(out[0]->hasoutput==0) return; if(in[0]->data) { CompBuf *cbuf= typecheck_compbuf(in[0]->data, CB_RGBA); CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); /* note, this returns zero'd image */ float rad, u, v, s, c, centx, centy, miny, maxy, minx, maxx; int x, y, yo, xo; ImBuf *ibuf, *obuf; rad= (M_PI*in[1]->vec[0])/180.0f; s= sin(rad); c= cos(rad); centx= cbuf->x/2; centy= cbuf->y/2; minx= -centx; maxx= -centx + (float)cbuf->x; miny= -centy; maxy= -centy + (float)cbuf->y; ibuf=IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0); obuf=IMB_allocImBuf(stackbuf->x, stackbuf->y, 32, 0); if(ibuf && obuf){ ibuf->rect_float=cbuf->rect; obuf->rect_float=stackbuf->rect; for(y=miny; y<maxy; y++) { yo= y+(int)centy; for(x=minx; x<maxx;x++) { u=c*x + y*s + centx; v=-s*x + c*y + centy; xo= x+(int)centx; switch(node->custom1) { case 0: neareast_interpolation(ibuf, obuf, u, v, xo, yo); break ; case 1: bilinear_interpolation(ibuf, obuf, u, v, xo, yo); break; case 2: bicubic_interpolation(ibuf, obuf, u, v, xo, yo); break; } } } /* rotate offset vector too, but why negative rad, ehh?? Has to be replaced with [3][3] matrix once (ton) */ s= sin(-rad); c= cos(-rad); centx= (float)cbuf->xof; centy= (float)cbuf->yof; stackbuf->xof= (int)( c*centx + s*centy); stackbuf->yof= (int)(-s*centx + c*centy); IMB_freeImBuf(ibuf); IMB_freeImBuf(obuf); } /* pass on output and free */ out[0]->data= stackbuf; if(cbuf!=in[0]->data) { free_compbuf(cbuf); } } }
CompBuf* node_composit_transform(CompBuf *cbuf, float x, float y, float angle, float scale, int filter_type) { CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_RGBA, 1); ImBuf *ibuf, *obuf; float mat[4][4], lmat[4][4], rmat[4][4], smat[4][4], cmat[4][4], icmat[4][4]; float svec[3]= {scale, scale, scale}, loc[2]= {x, y}; unit_m4(rmat); unit_m4(lmat); unit_m4(smat); unit_m4(cmat); /* image center as rotation center */ cmat[3][0]= (float)cbuf->x/2.0f; cmat[3][1]= (float)cbuf->y/2.0f; invert_m4_m4(icmat, cmat); size_to_mat4(smat, svec); /* scale matrix */ add_v2_v2(lmat[3], loc); /* tranlation matrix */ rotate_m4(rmat, 'Z', angle); /* rotation matrix */ /* compose transformation matrix */ mul_serie_m4(mat, lmat, cmat, rmat, smat, icmat, NULL, NULL, NULL); invert_m4(mat); ibuf= IMB_allocImBuf(cbuf->x, cbuf->y, 32, 0); obuf= IMB_allocImBuf(stackbuf->x, stackbuf->y, 32, 0); if (ibuf && obuf) { int i, j; ibuf->rect_float= cbuf->rect; obuf->rect_float= stackbuf->rect; for (j=0; j<cbuf->y; j++) { for (i=0; i<cbuf->x;i++) { float vec[3]= {i, j, 0}; mul_v3_m4v3(vec, mat, vec); switch(filter_type) { case 0: neareast_interpolation(ibuf, obuf, vec[0], vec[1], i, j); break; case 1: bilinear_interpolation(ibuf, obuf, vec[0], vec[1], i, j); break; case 2: bicubic_interpolation(ibuf, obuf, vec[0], vec[1], i, j); break; } } } IMB_freeImBuf(ibuf); IMB_freeImBuf(obuf); } /* pass on output and free */ return stackbuf; }