diff options
Diffstat (limited to 'source/blender/imbuf/intern/imageprocess.c')
| -rw-r--r-- | source/blender/imbuf/intern/imageprocess.c | 87 |
1 files changed, 53 insertions, 34 deletions
diff --git a/source/blender/imbuf/intern/imageprocess.c b/source/blender/imbuf/intern/imageprocess.c index 4890e240c6b..d7f1ab4419d 100644 --- a/source/blender/imbuf/intern/imageprocess.c +++ b/source/blender/imbuf/intern/imageprocess.c @@ -48,22 +48,28 @@ I stole it from util.h in the plugins api */ /* Only this one is used liberally here, and in imbuf */ void IMB_convert_rgba_to_abgr(struct ImBuf *ibuf) { - int size, do_float=0; + int size; unsigned char rt, *cp = (unsigned char *)ibuf->rect; float rtf, *cpf = ibuf->rect_float; - - if (ibuf->rect_float) do_float = 1; - size = ibuf->x * ibuf->y; - while(size-- > 0) { - rt= cp[0]; - cp[0]= cp[3]; - cp[3]= rt; - rt= cp[1]; - cp[1]= cp[2]; - cp[2]= rt; - cp+= 4; - if (do_float) { + if (ibuf->rect) { + size = ibuf->x * ibuf->y; + + while(size-- > 0) { + rt= cp[0]; + cp[0]= cp[3]; + cp[3]= rt; + rt= cp[1]; + cp[1]= cp[2]; + cp[2]= rt; + cp+= 4; + } + } + + if (ibuf->rect_float) { + size = ibuf->x * ibuf->y; + + while(size-- > 0) { rtf= cpf[0]; cpf[0]= cpf[3]; cpf[3]= rtf; @@ -87,16 +93,14 @@ void IMB_convert_rgba_to_abgr(struct ImBuf *ibuf) */ /* function assumes out to be zero'ed, only does RGBA */ static float P(float k){ - float aux; - aux=(float)(1.0f/6.0f)*( pow( MAX2(k+2.0f,0) , 3.0f ) - 4.0f * pow( MAX2(k+1.0f,0) , 3.0f ) + 6.0f * pow( MAX2(k,0) , 3.0f ) - 4.0f * pow( MAX2(k-1.0f,0) , 3.0f)); - return aux ; + return (float)(1.0f/6.0f)*( pow( MAX2(k+2.0f,0) , 3.0f ) - 4.0f * pow( MAX2(k+1.0f,0) , 3.0f ) + 6.0f * pow( MAX2(k,0) , 3.0f ) - 4.0f * pow( MAX2(k-1.0f,0) , 3.0f)); } void bicubic_interpolation(ImBuf *in, ImBuf *out, float x, float y, int xout, int yout) { int i,j,n,m,x1,y1; unsigned char *dataI,*outI; - float a,b, outR,outG,outB,outA,*dataF,*outF; + float a,b,w,wx,wy[4], outR,outG,outB,outA,*dataF,*outF; int do_rect, do_float; if (in == NULL) return; @@ -114,24 +118,39 @@ void bicubic_interpolation(ImBuf *in, ImBuf *out, float x, float y, int xout, in outG= 0.0f; outB= 0.0f; outA= 0.0f; + + /* avoid calling multiple times */ + wy[0] = P(b-(-1)); + wy[1] = P(b- 0); + wy[2] = P(b- 1); + wy[3] = P(b- 2); + for(n= -1; n<= 2; n++){ - for(m= -1; m<= 2; m++){ - x1= i+n; - y1= j+m; - if (x1>0 && x1 < in->x && y1>0 && y1<in->y) { - if (do_float) { - dataF= in->rect_float + in->x * y1 * 4 + 4*x1; - outR+= dataF[0] * P(n-a) * P(b-m); - outG+= dataF[1] * P(n-a) * P(b-m); - outB+= dataF[2] * P(n-a) * P(b-m); - outA+= dataF[3] * P(n-a) * P(b-m); - } - if (do_rect) { - dataI= (unsigned char*)in->rect + in->x * y1 * 4 + 4*x1; - outR+= dataI[0] * P(n-a) * P(b-m); - outG+= dataI[1] * P(n-a) * P(b-m); - outB+= dataI[2] * P(n-a) * P(b-m); - outA+= dataI[3] * P(n-a) * P(b-m); + x1= i+n; + if (x1>0 && x1 < in->x) { + wx = P(n-a); + for(m= -1; m<= 2; m++){ + y1= j+m; + if (y1>0 && y1<in->y) { + /* normally we could do this */ + /* w = P(n-a) * P(b-m); */ + /* except that would call P() 16 times per pixel therefor pow() 64 times, better precalc these */ + w = wx * wy[m+1]; + + if (do_float) { + dataF= in->rect_float + in->x * y1 * 4 + 4*x1; + outR+= dataF[0] * w; + outG+= dataF[1] * w; + outB+= dataF[2] * w; + outA+= dataF[3] * w; + } + if (do_rect) { + dataI= (unsigned char*)in->rect + in->x * y1 * 4 + 4*x1; + outR+= dataI[0] * w; + outG+= dataI[1] * w; + outB+= dataI[2] * w; + outA+= dataI[3] * w; + } } } } |