working on textures to look behind on BG using only subset of cameras

src/main/java/com/elphel/imagej/gpu/GpuQuad.java

@@ -2290,10 +2290,10 @@ public class GpuQuad{ // quad camera description
 		int [] cpu_num_texture_tiles = new int[8];
 
 		//		cuMemcpyDtoH(Pointer.to(cpu_woi), gpu_woi,  cpu_woi.length * Sizeof.INT); // hope that Float.floatToIntBits(fcorr_indices[i]) is not needed
-		cpu_woi[0] = width;
-		cpu_woi[1] = height;
-		cpu_woi[2] = 0;
-		cpu_woi[3] = 0;
+		cpu_woi[0] = width;   // larger than any x
+		cpu_woi[1] = height;  // larger than any y
+		cpu_woi[2] = 0;       // smaller or equal than any x
+		cpu_woi[3] = 0;       // smaller or equal than any y
 		cuMemcpyHtoD(gpu_woi, Pointer.to(cpu_woi),  cpu_woi.length * Sizeof.INT);
 //		cuMemcpyDtoH(Pointer.to(cpu_woi), gpu_woi,  cpu_woi.length * Sizeof.INT); //just for testing		
 		
@@ -2395,6 +2395,9 @@ public class GpuQuad{ // quad camera description
 		int texture_width =        (cpu_woi[2] + 1) * GPUTileProcessor.DTT_SIZE;
 		int texture_tiles_height = (cpu_woi[3] + 1) * GPUTileProcessor.DTT_SIZE;
 		int texture_slices =       num_colors + 1;
+		if ((keep_weights & 2) != 0) {
+			 texture_slices += num_colors * num_cams;
+		}
 
 		int blocks_x2 = ((texture_width + 
 				((1 << (GPUTileProcessor.THREADS_DYNAMIC_BITS + GPUTileProcessor.DTT_SIZE_LOG2 )) - 1)) >>
@@ -3382,6 +3385,7 @@ public class GpuQuad{ // quad camera description
 		return textures;
 	}
 
+	/*
 	public static double [][][][] doubleTextures( // not used
 			Rectangle    woi,
 			int []       indices,
@@ -3407,7 +3411,7 @@ public class GpuQuad{ // quad camera description
 		}
 		return textures;
 	}
-
+   */
 	public static double [][][][] doubleTextures( // may be accelerated with multithreading if needed.
 			Rectangle    woi, // null or width and height match texture_tiles
 			double [][][][] texture_tiles, // null or [tilesY][tilesX]

src/main/java/com/elphel/imagej/tileprocessor/ImageDtt.java

@@ -692,12 +692,14 @@ public class ImageDtt extends ImageDttCPU {
 				true,           // boolean   calc_textures,
 				false,          // boolean   calc_extra
 				false);         // boolean   linescan_order)
-		int    num_src_slices = numcol + 1; //  + (clt_parameters.keep_weights?(ports + numcol + 1):0); // 12 ; // calculate
+//		int    num_src_slices = numcol + 1; //  + (clt_parameters.keep_weights?(ports + numcol + 1):0); // 12 ; // calculate
+		int    num_src_slices = numcol + 1 + ((keep_weights!=0)?(getNumSensors() + numcol + 1):0);
+		int    num_out_slices = numcol + 1 + ((keep_weights!=0)?(getNumSensors()):0); // 18
 		int [] texture_indices = gpuQuad.getTextureIndices();
 		float [] flat_textures =  gpuQuad.getFlatTextures(
 				texture_indices.length,
 				numcol,               // int     num_colors,
-	    		false); // clt_parameters.keep_weights); // boolean keep_weights);
+				(keep_weights != 0)); // clt_parameters.keep_weights); // boolean keep_weights);
 		int tilesX = gpuQuad.img_width / GPUTileProcessor.DTT_SIZE;
 		int tilesY = gpuQuad.img_height / GPUTileProcessor.DTT_SIZE;
 		double [][][][] texture_tiles = new double [tilesY][tilesX][][];
@@ -707,7 +709,7 @@ public class ImageDtt extends ImageDttCPU {
 	    		texture_indices,                     // int []       indices,
 	    		flat_textures,                       // float [][][] ftextures,
 	    		tilesX,                              // int          full_width,
-	    		isMonochrome()? 2: 4,                // rbga only /int          num_slices Same number
+	    		num_out_slices, // isMonochrome()? 2: 4,                // rbga only /int          num_slices Same number
 	    		num_src_slices                       // int          num_src_slices
 	    		);
 		return texture_tiles;