if(bpp >= 2) g = dst[1];\
if(bpp >= 3) b = dst[2];\
if(bpp >= 4) a = dst[3];\
- for(; i < size; i+=bpp) {\
+ for(; i <= size - bpp; i+=bpp) {\
dst[i+0] = r = op(r, src[i+0], last[i+0]);\
if(bpp == 1) continue;\
dst[i+1] = g = op(g, src[i+1], last[i+1]);\
else if(bpp == 2) UNROLL1(2, op)\
else if(bpp == 3) UNROLL1(3, op)\
else if(bpp == 4) UNROLL1(4, op)\
- else {\
- for (; i < size; i += bpp) {\
- int j;\
- for (j = 0; j < bpp; j++)\
- dst[i+j] = op(dst[i+j-bpp], src[i+j], last[i+j]);\
- }\
- }
+ for (; i < size; i++) {\
+ dst[i] = op(dst[i-bpp], src[i], last[i]);\
+ }\
/* NOTE: 'dst' can be equal to 'last' */
static void png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type,