// Note that the input matrix uses 0 == white, 1 == black, while the output matrix uses // 0 == black, 255 == white (i.e. an 8 bit greyscale bitmap). private static ByteMatrix RenderResult(QRCode code, int width, int height) { ByteMatrix input = code.GetMatrix(); int inputWidth = input.GetWidth(); int inputHeight = input.GetHeight(); int qrWidth = inputWidth + (QUIET_ZONE_SIZE << 1); int qrHeight = inputHeight + (QUIET_ZONE_SIZE << 1); int outputWidth = Math.Max(width, qrWidth); int outputHeight = Math.Max(height, qrHeight); int multiple = Math.Min(outputWidth / qrWidth, outputHeight / qrHeight); // Padding includes both the quiet zone and the extra white pixels to accommodate the requested // dimensions. For example, if input is 25x25 the QR will be 33x33 including the quiet zone. // If the requested size is 200x160, the multiple will be 4, for a QR of 132x132. These will // handle all the padding from 100x100 (the actual QR) up to 200x160. int leftPadding = (outputWidth - (inputWidth * multiple)) / 2; int topPadding = (outputHeight - (inputHeight * multiple)) / 2; ByteMatrix output = new ByteMatrix(outputWidth, outputHeight); sbyte[][] outputArray = output.GetArray(); // We could be tricky and use the first row in each set of multiple as the temporary storage, // instead of allocating this separate array. sbyte[] row = new sbyte[outputWidth]; // 1. Write the white lines at the top for (int y = 0; y < topPadding; y++) { SetRowColor(outputArray[y], (sbyte)-1); } // 2. Expand the QR image to the multiple sbyte[][] inputArray = input.GetArray(); for (int y = 0; y < inputHeight; y++) { // a. Write the white pixels at the left of each row for (int x = 0; x < leftPadding; x++) { row[x] = (sbyte)-1; } // b. Write the contents of this row of the barcode int offset = leftPadding; for (int x = 0; x < inputWidth; x++) { sbyte value = (inputArray[y][x] == 1) ? (sbyte)0 : (sbyte)-1; for (int z = 0; z < multiple; z++) { row[offset + z] = value; } offset += multiple; } // c. Write the white pixels at the right of each row offset = leftPadding + (inputWidth * multiple); for (int x = offset; x < outputWidth; x++) { row[x] = (sbyte)-1; } // d. Write the completed row multiple times offset = topPadding + (y * multiple); for (int z = 0; z < multiple; z++) { System.Array.Copy(row, 0, outputArray[offset + z], 0, outputWidth); } } // 3. Write the white lines at the bottom int offset2 = topPadding + (inputHeight * multiple); for (int y = offset2; y < outputHeight; y++) { SetRowColor(outputArray[y], (sbyte)-1); } return output; }
// Note that the input matrix uses 0 == white, 1 == black, while the output matrix uses // 0 == black, 255 == white (i.e. an 8 bit greyscale bitmap). private static ByteMatrix RenderResult(QRCode code, int width, int height) { ByteMatrix input = code.GetMatrix(); int inputWidth = input.GetWidth(); int inputHeight = input.GetHeight(); int qrWidth = inputWidth + (QUIET_ZONE_SIZE << 1); int qrHeight = inputHeight + (QUIET_ZONE_SIZE << 1); int outputWidth = Math.Max(width, qrWidth); int outputHeight = Math.Max(height, qrHeight); int multiple = Math.Min(outputWidth / qrWidth, outputHeight / qrHeight); // Padding includes both the quiet zone and the extra white pixels to accommodate the requested // dimensions. For example, if input is 25x25 the QR will be 33x33 including the quiet zone. // If the requested size is 200x160, the multiple will be 4, for a QR of 132x132. These will // handle all the padding from 100x100 (the actual QR) up to 200x160. int leftPadding = (outputWidth - (inputWidth * multiple)) / 2; int topPadding = (outputHeight - (inputHeight * multiple)) / 2; ByteMatrix output = new ByteMatrix(outputWidth, outputHeight); sbyte[][] outputArray = output.GetArray(); // We could be tricky and use the first row in each set of multiple as the temporary storage, // instead of allocating this separate array. sbyte[] row = new sbyte[outputWidth]; // 1. Write the white lines at the top for (int y = 0; y < topPadding; y++) { SetRowColor(outputArray[y], (sbyte)-1); } // 2. Expand the QR image to the multiple sbyte[][] inputArray = input.GetArray(); for (int y = 0; y < inputHeight; y++) { // a. Write the white pixels at the left of each row for (int x = 0; x < leftPadding; x++) { row[x] = (sbyte)-1; } // b. Write the contents of this row of the barcode int offset = leftPadding; for (int x = 0; x < inputWidth; x++) { sbyte value = (inputArray[y][x] == 1) ? (sbyte)0 : (sbyte)-1; for (int z = 0; z < multiple; z++) { row[offset + z] = value; } offset += multiple; } // c. Write the white pixels at the right of each row offset = leftPadding + (inputWidth * multiple); for (int x = offset; x < outputWidth; x++) { row[x] = (sbyte)-1; } // d. Write the completed row multiple times offset = topPadding + (y * multiple); for (int z = 0; z < multiple; z++) { System.Array.Copy(row, 0, outputArray[offset + z], 0, outputWidth); } } // 3. Write the white lines at the bottom int offset2 = topPadding + (inputHeight * multiple); for (int y = offset2; y < outputHeight; y++) { SetRowColor(outputArray[y], (sbyte)-1); } return(output); }