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Lines Matching refs:ppb

2762       png_const_bytep ppa, ppb;
2769       ppb = rowb;
2775       for (y=0, match=1; y<height && match; ++y, ppa += stridea, ppb += strideb)
2781             png_byte bval = ppb[x];
2965       png_const_bytep ppa, ppb;
2968       for (x=0, ppa=rowa, ppb=rowb; x<width; ++x)
2978             psb = (png_const_bytep)b->colormap + b_sample * *ppb++;
2980             psb = ppb, ppb += b_sample;