apps/showimage/Filter.cpp

351 	ColumnData* cd;
374 	cd = columnData;
375 	for (i = 0; i < destW; i++, cd++) {
377 		cd->srcColumn = (intType)column;
378 		cd->alpha1 = column - cd->srcColumn;
379 		cd->alpha0 = 1.0 - cd->alpha1;
487 	ColumnDataFP* cd;
515 	cd = columnData;
516 	for (i = 0; i < destW; i++, cd++) {
519 		cd->srcColumn = from_fixed_point(column);
520 		cd->alpha1 = tail_value(column); // weigth for left pixel value
521 		cd->alpha0 = kFPOne - cd->alpha1; // weigth for right pixel value
676 	DownScaleColumnData* cd = columnData;
677 	for (x = 0; x <= destW; x++, cd++) {
681 		cd->from = (intType)fFromX;
682 		cd->to = (intType)fToX;
684 		cd->alpha0 = 1.0 - (fFromX - cd->from);
685 		cd->alpha1 = fToX - cd->to;
701 		cd = columnData;
702 		for (x = 0; x <= destW; x++, destData += kBPP, cd++) {
703 			const intType fromX = cd->from;
704 			const intType toX = cd->to;
706 			const float a0X = cd->alpha0;
707 			const float a1X = cd->alpha1;
787 	DitheringColumnData* cd;
812 	cd = columnData;
813 	for (x = destW; x >= 0; x --, cd++) {
814 		cd->error[0] = cd->error[1] = cd->error[2] = 0;
845 			cd = &columnData[x + 1];
846 			error[0] = cd->error[0] + 7 * err[0];
847 			error[1] = cd->error[1] + 7 * err[1];
848 			error[2] = cd->error[2] + 7 * err[2];
851 			cd->error[0] = err[0];
852 			cd->error[1] = err[1];
853 			cd->error[2] = err[2];
856 			cd--;
857 			cd->error[0] += 5 * err[0];
858 			cd->error[1] += 5 * err[1];
859 			cd->error[2] += 5 * err[2];
862 			cd--;
863 			cd->error[0] += 3 * err[0];
864 			cd->error[1] += 3 * err[1];
865 			cd->error[2] += 3 * err[2];
896 			cd = &columnData[x - 1];
897 			error[0] = cd->error[0] + 7 * err[0];
898 			error[1] = cd->error[1] + 7 * err[1];
899 			error[2] = cd->error[2] + 7 * err[2];
902 			cd->error[0] = err[0];
903 			cd->error[1] = err[1];
904 			cd->error[2] = err[2];
907 			cd++;
908 			cd->error[0] += 5 * err[0];
909 			cd->error[1] += 5 * err[1];
910 			cd->error[2] += 5 * err[2];
913 			cd++;
914 			cd->error[0] += 3 * err[0];
915 			cd->error[1] += 3 * err[1];
916 			cd->error[2] += 3 * err[2];