diff options
author | Ton Roosendaal <ton@blender.org> | 2006-03-14 12:40:55 +0300 |
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committer | Ton Roosendaal <ton@blender.org> | 2006-03-14 12:40:55 +0300 |
commit | b86d85f80b0656daa30b5bc6f9d4adae4a52a3ca (patch) | |
tree | 50a837eb3f0cf5ab6491d05892c11e85445a56d3 /source/blender/imbuf/intern/scaling.c | |
parent | ca6aca0c0776c8af3f5f5f0b69f07ddee15516ec (diff) |
Interpolated scaling for float buffers in Imbuf still went wrong...
leftover bugs of first migration to floats in imbuf. :)
As extra I've reshuffled the mainloops for scaling, it's now twice as
fast.
Diffstat (limited to 'source/blender/imbuf/intern/scaling.c')
-rw-r--r-- | source/blender/imbuf/intern/scaling.c | 204 |
1 files changed, 132 insertions, 72 deletions
diff --git a/source/blender/imbuf/intern/scaling.c b/source/blender/imbuf/intern/scaling.c index 1fd09da225d..c461381ba10 100644 --- a/source/blender/imbuf/intern/scaling.c +++ b/source/blender/imbuf/intern/scaling.c @@ -444,13 +444,14 @@ struct ImBuf *IMB_halflace(struct ImBuf *ibuf1) static struct ImBuf *scaledownx(struct ImBuf *ibuf, int newx) { - uchar *rect,*_newrect,*newrect; - float *rectf,*_newrectf,*newrectf; - float sample, add, val, nval, valf, nvalf; - int x, y, i, do_float=0; + uchar *rect, *_newrect, *newrect; + float *rectf, *_newrectf, *newrectf; + float sample, add, val[4], nval[4], valf[4], nvalf[4]; + int x, y, do_float=0; rectf = NULL; _newrectf= NULL; newrectf = NULL; - nval = 0; nvalf = 0; + nval[0]= nval[1]= nval[2]= nval[3]= 0.0f; + nvalf[0]=nvalf[1]=nvalf[2]=nvalf[3]= 0.0f; if (ibuf==NULL) return(0); if (ibuf->rect==NULL) return(ibuf); @@ -465,48 +466,76 @@ static struct ImBuf *scaledownx(struct ImBuf *ibuf, int newx) add = (ibuf->x - 0.001) / newx; - /* all four components, rgba/abgr */ - for(i=3 ; i >= 0 ; i--){ rect = (uchar *) ibuf->rect; - rect += i; - newrect = _newrect + i; + newrect = _newrect; + if (do_float) { rectf = ibuf->rect_float; - rectf += i; - newrectf = _newrectf + i; + newrectf = _newrectf; } + + for (y = ibuf->y; y>0 ; y--) { + sample = 0.0f; + val[0]= val[1]= val[2]= val[3]= 0.0f; + valf[0]=valf[1]=valf[2]=valf[3]= 0.0f; + + for (x = newx ; x>0 ; x--) { + nval[0] = - val[0] * sample; + nval[1] = - val[1] * sample; + nval[2] = - val[2] * sample; + nval[3] = - val[3] * sample; + + if (do_float) { + nvalf[0] = - valf[0] * sample; + nvalf[1] = - valf[1] * sample; + nvalf[2] = - valf[2] * sample; + nvalf[3] = - valf[3] * sample; + } + + sample += add; - for (y = ibuf->y; y>0 ; y--){ - val = sample = valf = 0.0; - - for (x = newx ; x>0 ; x--){ - nval = - val * sample; - if (do_float) nvalf = - valf * sample; - sample += add; - - while (sample >= 1.0){ - sample -= 1.0; - nval += *rect; - rect += 4; - if (do_float) { - nvalf += *rectf; - rectf += 4; - } - } - val = *rect; + while (sample >= 1.0f){ + sample -= 1.0f; + + nval[0] += rect[0]; + nval[1] += rect[1]; + nval[2] += rect[2]; + nval[3] += rect[3]; rect += 4; - nval += sample * val; + if (do_float) { - valf = *rectf; + nvalf[0] += rectf[0]; + nvalf[1] += rectf[1]; + nvalf[2] += rectf[2]; + nvalf[3] += rectf[3]; rectf += 4; - nvalf += sample * valf; - *newrectf = (nvalf/add) + 0.5; - newrectf += 4; } - sample -= 1.0; - *newrect = (nval/add) + 0.5; - newrect += 4; } + + val[0]= rect[0];val[1]= rect[1];val[2]= rect[2];val[3]= rect[3]; + rect += 4; + + newrect[0] = ((nval[0] + sample * val[0])/add + 0.5f); + newrect[1] = ((nval[1] + sample * val[1])/add + 0.5f); + newrect[2] = ((nval[2] + sample * val[2])/add + 0.5f); + newrect[3] = ((nval[3] + sample * val[3])/add + 0.5f); + + newrect += 4; + + if (do_float) { + + valf[0]= rectf[0];valf[1]= rectf[1];valf[2]= rectf[2];valf[3]= rectf[3]; + rectf += 4; + + newrectf[0] = ((nvalf[0] + sample * valf[0])/add); + newrectf[1] = ((nvalf[1] + sample * valf[1])/add); + newrectf[2] = ((nvalf[2] + sample * valf[2])/add); + newrectf[3] = ((nvalf[3] + sample * valf[3])/add); + + newrectf += 4; + } + + sample -= 1.0f; } } @@ -529,11 +558,12 @@ static struct ImBuf *scaledowny(struct ImBuf *ibuf, int newy) { uchar *rect, *_newrect, *newrect; float *rectf, *_newrectf, *newrectf; - float sample, add, val, nval, valf, nvalf; - int x, y, i, skipx, do_float = 0; + float sample, add, val[4], nval[4], valf[4], nvalf[4]; + int x, y, skipx, do_float = 0; rectf= NULL; _newrectf = NULL; newrectf = NULL; - nval = 0; nvalf = 0; + nval[0]= nval[1]= nval[2]= nval[3]= 0.0f; + nvalf[0]=nvalf[1]=nvalf[2]=nvalf[3]= 0.0f; if (ibuf==NULL) return(0); if (ibuf->rect==NULL) return(ibuf); @@ -550,47 +580,77 @@ static struct ImBuf *scaledowny(struct ImBuf *ibuf, int newy) add = (ibuf->y - 0.001) / newy; skipx = 4 * ibuf->x; - /* all four components, rgba/abgr */ - for(i=3 ; i>=0 ; i--){ - for (x = skipx - 4; x>=0 ; x-= 4){ - rect = ((uchar *) ibuf->rect) + i + x; - newrect = _newrect + i + x; + for (x = skipx - 4; x>=0 ; x-= 4) { + + rect = ((uchar *) ibuf->rect) + x; + newrect = _newrect + x; + if (do_float) { + rectf = ibuf->rect_float + x; + newrectf = _newrectf + x; + } + + sample = 0.0f; + val[0]= val[1]= val[2]= val[3]= 0.0f; + valf[0]=valf[1]=valf[2]=valf[3]= 0.0f; + + for (y = newy ; y>0 ; y--) { + nval[0] = - val[0] * sample; + nval[1] = - val[1] * sample; + nval[2] = - val[2] * sample; + nval[3] = - val[3] * sample; + if (do_float) { - rectf = ((float *) ibuf->rect_float) + i + x; - newrectf = _newrectf + i + x; + nvalf[0] = - valf[0] * sample; + nvalf[1] = - valf[1] * sample; + nvalf[2] = - valf[2] * sample; + nvalf[3] = - valf[3] * sample; } - val = sample = 0.0; - - for (y = newy ; y>0 ; y--){ - nval = - val * sample; - if (do_float) nvalf = - val * sample; - sample += add; + + sample += add; - while (sample >= 1.0){ - sample -= 1.0; - nval += *rect; - rect += skipx; - if (do_float) { - nvalf += *rectf; - rectf += skipx; - } - } - val = *rect; + while (sample >= 1.0) { + sample -= 1.0; + + nval[0] += rect[0]; + nval[1] += rect[1]; + nval[2] += rect[2]; + nval[3] += rect[3]; rect += skipx; - nval += sample * val; - *newrect = (nval/add) + 0.5; - newrect += skipx; + if (do_float) { - valf = *rectf; + nvalf[0] += rectf[0]; + nvalf[1] += rectf[1]; + nvalf[2] += rectf[2]; + nvalf[3] += rectf[3]; rectf += skipx; - nvalf += sample * valf; - *newrectf = (nvalf/add) + 0.5; - newrectf += skipx; } - sample -= 1.0; } + val[0]= rect[0];val[1]= rect[1];val[2]= rect[2];val[3]= rect[3]; + rect += skipx; + + newrect[0] = ((nval[0] + sample * val[0])/add + 0.5f); + newrect[1] = ((nval[1] + sample * val[1])/add + 0.5f); + newrect[2] = ((nval[2] + sample * val[2])/add + 0.5f); + newrect[3] = ((nval[3] + sample * val[3])/add + 0.5f); + + newrect += skipx; + + if (do_float) { + + valf[0]= rectf[0];valf[1]= rectf[1];valf[2]= rectf[2];valf[3]= rectf[3]; + rectf += skipx; + + newrectf[0] = ((nvalf[0] + sample * valf[0])/add); + newrectf[1] = ((nvalf[1] + sample * valf[1])/add); + newrectf[2] = ((nvalf[2] + sample * valf[2])/add); + newrectf[3] = ((nvalf[3] + sample * valf[3])/add); + + newrectf += skipx; + } + + sample -= 1.0; } - } + } imb_freerectImBuf(ibuf); ibuf->mall |= IB_rect; |