How to set custom marker icon size in static google map in website? I want to set size 100 * 130.
Using this code you also can add your custom marker with your desirable size
int height = 100;
int width = 130;
BitmapDrawable bitmapdraw = (BitmapDrawable) getResources().getDrawable(R.mipmap.marker);
Bitmap b = bitmapdraw.getBitmap();
Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false);
Marker marker = myMap.addMarker(new MarkerOptions().position(latLng).icon(BitmapDescriptorFactory.fromBitmap(smallMarker)));
Related
I've been trying for several days to crop an Image texture (Board - originalImage in the code example) on WorldSpace Canvas using RectTransform(CropArea - cropArea in the code example) on Overlay Canvas.
The problem is that I can't find the correct coordinates of the cropArea on the original image.
I've tried with this:
Texture2D croppedTexture = new Texture2D((int)cropArea.rectTransform.rect.width, (int)cropArea.rectTransform.rect.height);
Texture2D originalTexture = (Texture2D) originalImage.mainTexture;
croppedTexture.SetPixels(originalTexture.GetPixels((int)cropArea.rectTransform.anchoredPosition.x, (int)cropArea.rectTransform.anchoredPosition.y, (int)cropArea.rectTransform.rect.width, (int)cropArea.rectTransform.rect.height));
croppedTexture.Apply();
resultImage.texture = croppedTexture;
But the result image is not cropped properly. It is a bit to the left and a bit down.
Does anybody have an idea how can I achieve this?
I found I have to consider so many variables. Here is a simplified version.
Need a new field: worldCanvas
var cropRectTrans = cropArea.rectTransform;
var origRectTrans = originalImage.rectTransform;
var origRectSize = origRectTrans.sizeDelta;
var pivot = origRectTrans.pivot;
Texture2D originalTexture = (Texture2D)originalImage.mainTexture;
// Scale pivot to pixel unit.
pivot.Scale(origRectSize);
// Get corners of the overlay rectangle in world space.
// The canvas is "Screen Space Overlay", so these positions are
// also the screen positions.
var cropCorners = new Vector3[4];
cropRectTrans.GetWorldCorners(cropCorners);
// Transform the left-bottom and right-top corners to the space
// of the original image. The translated position needs to be added
// with the scaled pivot, so that we can obtain the coordinates
// relative to the left-bottom corner of the image.
var cam = worldCanvas.worldCamera;
RectTransformUtility.ScreenPointToLocalPointInRectangle(
origRectTrans, cropCorners[0], cam, out Vector2 lb);
RectTransformUtility.ScreenPointToLocalPointInRectangle(
origRectTrans, cropCorners[2], cam, out Vector2 tr);
var point = lb + pivot;
var size = tr - lb;
// Scale the position and size if the image is scaled.
var scale = new Vector2(
originalTexture.width / origRectSize.x,
originalTexture.height / origRectSize.y
);
point.Scale(scale);
size.Scale(scale);
// Finally we get the correct position and size in the original image space.
Texture2D croppedTexture = new Texture2D((int)size.x, (int)size.y);
croppedTexture.SetPixels(originalTexture.GetPixels(
(int)point.x, (int)point.y, (int)size.x, (int)size.y));
croppedTexture.Apply();
resultImage.texture = croppedTexture;
I'm creating a game in flutter. I'm using a tilesheet to render tiles. I chop the image in 50x50 sections and then render them depending on their surrounding.
The tiles are rendered at the position of their corresponding "game object". In order to keep the code clean from details about converting from the game world positions and sizes to actual screen sizes my painting classes always obtain world space and then scales it up to screen space.
However, after scaling up the tiles I'm sometimes left with gaps between the tiles.
I've tried:
Placing the tiles at their appropriate screen position, without scaling the canvas first, in case the scaling produces the problem.
Adding borders around the tiles in the tilesheet in case the canvas.drawImageRect samples too many pixels.
Making the board take a size divisible by the number of tiles, in case there is a rounding error.
Drawing a subsection of the tile.
I can't seem to make the gap disappear. Do you have any suggestions?
Below is the relevant drawing code, where size and position are in world space and frameX and frameY is the positions to extract from the spritesheet.
void drawFrameAt(int x, int y, Canvas canvas, Offset position, Size size) {
var frameX = x * frameWidth;
var frameY = y * frameHeight;
var rect = Rect.fromLTWH(frameX, frameY, frameWidth, frameHeight);
var width = size.width;
var height = size.height;
var destination = Rect.fromLTWH(position.dx, position.dy, width, height);
canvas.drawImageRect(image, rect, destination, Paint());
}
I'm trying to draw a rectangle to the very top left of a page using ITextSharp (5.5.13). I want to draw in the page margins. However, the rectangle is around 25 pixels too low. How can I draw the rectangle in the top left corner?
Below is how I'm adding the rectangle to the page:
using (PdfReader reader = new PdfReader(inputPdf.FullName))
using (PdfStamper stamper = new PdfStamper(reader, new FileStream(outputPdf.FullName, FileMode.Create)))
{
PdfContentByte contentByte = stamper.GetOverContent(1);
PdfDocument doc = contentByte.PdfDocument;
float X = 0.0f;
float Y = 0.0f;
float Height = Utilities.InchesToPoints(0.50f);
float Width = Utilities.InchesToPoints(0.50f);
float llx = (doc.Left - doc.LeftMargin) + X;
float lly = (doc.Top - doc.TopMargin) - (Height + Y);
float urx = (doc.Left - doc.LeftMargin) + Width + X;
float ury = (doc.Top - doc.TopMargin) - Y;
Rectangle rectangle = new Rectangle(llx, lly, urx, ury)
{
BackgroundColor = BaseColor.BLACK
};
contentByte.Rectangle(rectangle);
}
Below are the debug values for each aforementioned variable:
Whenever you use a PdfStamper, the PdfDocument you can retrieve from its parts does not contain sensible information, it merely is a dummy object.
Thus, don't try to determine the page size from that PdfDocument doc, instead use the appropriate methods or properties of your PdfReader reader, e.g.
/** Gets the crop box without taking rotation into account. This
* is the value of the /CropBox key. The crop box is the part
* of the document to be displayed or printed. It usually is the same
* as the media box but may be smaller. If the page doesn't have a crop
* box the page size will be returned.
* #param index the page number. The first page is 1
* #return the crop box
*/
virtual public Rectangle GetCropBox(int index)
Is it possible to have a roundRectangle with no border? The following code creates roundRectangles and rectangles with border sizes of 0f and 1f. For the roundRectangle there is still a visible border when the lineWidth is set to 0f, but this is not true for a rectangle with a border of 0f.
Here is the code I'm using:
magazine = new Document(PageSize.LETTER,0,0,0,0);
pdfw = PdfWriter.getInstance(magazine, new FileOutputStream("out.pdf"));
magazine.open();
canvas = pdfw.getDirectContent();
canvas.rectangle(0,0,600,750);
canvas.setColorFill(BaseColor.ORANGE);
canvas.fillStroke();
canvas.setColorStroke(BaseColor.BLACK);
canvas.setColorFill(BaseColor.GRAY);
canvas.setLineWidth(1f);
llx = 100;
lly = 100;
wid = 100;
hei = 100;
canvas.roundRectangle(llx,lly, wid, hei, 10);
canvas.fillStroke();
llx = 100;
lly = 210;
wid = 100;
hei = 100;
canvas.rectangle(llx,lly, wid, hei);
canvas.fillStroke();
canvas.setColorStroke(BaseColor.BLACK);
canvas.setColorFill(BaseColor.WHITE);
canvas.setLineWidth(0f);
llx = 210;
lly = 100;
wid = 100;
hei = 100;
canvas.roundRectangle(llx,lly, wid, hei, 10);
canvas.fillStroke();
llx = 210;
lly = 210;
wid = 100;
hei = 100;
canvas.rectangle(llx,lly, wid, hei );
canvas.fillStroke();
When you draw lines and shapes in PDF, you use path construction operators. The following method introduces an re (rectangle) operator to construct a rectangle.
canvas.rectangle(0,0,600,750);
iText also provides convenience methods. For instance: the following method introduces a sequence of m (move to), l (line to), c (curve to),... operators:
canvas.roundRectangle(llx,lly, wid, hei, 10);
As soon as you have constructed the path, you can use a path painting operator to actually draw something. iText has different fill(), stroke() and fillStroke() variations.
You are using this method:
canvas.fillStroke();
This means that you fill the path with the fill color and stroke the path with the stroke color. In your question, you indicate that you only want to fill the path (you want to color what's inside the rounded rectangle); you do not want to stroke it (you don't want to draw the border of the rounded rectangle).
This is easy to achieve. Just replace fillStroke() by fill():
canvas.fill();
Now you will only fill the rounded rectangle and not stroke its border.
Comment by mkl:
A line width of 0 shall denote the thinnest line that can be rendered at device resolution: 1 device pixel wide.
This is correct. It is a common misconception that changing the width of a line to 0 means that the line isn't drawn when invoking stroke(). If you don't want to see a line, the solution is simple: don't stroke it.
I'm using com.google.zxing.qrcode.QRCodeWriter to encode data and com.google.zxing.client.j2se.MatrixToImageWriter to generate the QR Code image. On a 400x400 image, there is about a 52 pixel wide border around the code. I'd like this border to be narrower, maybe 15 pixels, but I don't see anything in the API for doing that. Am I missing something in the documenation? Or would I need to process the image myself?
For reference, here is an example 400x400 QR Code produced with the ZXing library:
The QR spec requires a four module quiet zone and that's what zxing creates. (See QUIET_ZONE_SIZE in QRCodeWriter.renderResult.)
More recent versions of ZXing allow you to set the size of the quiet zone (basically the intrinsic padding of the QR code) by supplying an int value with the EncodeHintType.MARGIN key. Simply include it in the hints Map you supply to the Writer's encode(...) method, e.g.:
Map<EncodeHintType, Object> hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
hints.put(EncodeHintType.MARGIN, 2); /* default = 4 */
If you change this, you risk lowering the decode success rate.
Even by setting EncodeHintType.MARGIN to 0, the algorithm that convert the QRCode "dot" matrix to pixels data can generate a small margin (the algorithm enforce a constant number of pixels per dots, so the margin pixel size is the remainder of the integer division of pixels size by QR-Code dot size).
However you can completely bypass this "dot to pixel" generation: you compute the QRCode dot matrix directly by calling the public com.google.zxing.qrcode.encoder.Encoder class, and generate the pixel image yourself. Code below:
// Step 1 - generate the QRCode dot array
Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>(1);
hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
QRCode qrCode = Encoder.encode(what, ErrorCorrectionLevel.L, hints);
// Step 2 - create a BufferedImage out of this array
int width = qrCode.getMatrix().getWidth();
int height = qrCode.getMatrix().getHeight();
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
int[] rgbArray = new int[width * height];
int i = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
rgbArray[i] = qrCode.getMatrix().get(x, y) > 0 ? 0xFFFFFF : 0x000000;
i++;
} }
image.setRGB(0, 0, width, height, rgbArray, 0, width);
The conversion of the BufferedImage to PNG data is left as an exercise to the reader. You can also scale the image by setting a fixed number of pixels per dots.
It's usually more optimized that way, the generated image size is the smallest possible. If you rely on client to scale the image (w/o blur) you do not need more than 1 pixel per dot.
HashMap hintMap = new HashMap();
hintMap.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);
hintMap.put(EncodeHintType.MARGIN, -1);
no margin
UPDATE
Add dependencies (from comments)
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.0</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.2.0</version>
</dependency>
In swift you can:
let hints = ZXEncodeHints()
hints!.margin = NSNumber(int: 0)
let result = try writer.encode(code, format: format, width: Int32(size.width), height: Int32(size.height), hints: hints)
let cgImage = ZXImage(matrix: result, onColor: UIColor.blackColor().CGColor, offColor: UIColor.clearColor().CGColor).cgimage
let QRImage = UIImage(CGImage: cgImage)
My problem is that I need to generate a PNG image with a transparent background fixed to x * x pixels.
I find that whatever I do with EncodeHintType.MARGIN, these is always some unexpected margin.
After reading its source code, I find a way to fix my problem, this is my code. There is no margin in the output BufferedImage.
BufferedImage oriQrImg = getQrImg(CONTENT_PREFIX+userInfo, ErrorCorrectionLevel.L,BLACK);
BufferedImage scaledImg = getScaledImg(oriQrImg,REQUIRED_QR_WIDTH,REQUIRED_QR_HEIGHT);
private static BufferedImage getQrImg(String content, ErrorCorrectionLevel level, int qrColor) throws WriterException {
QRCode qrCode = Encoder.encode(content, level, QR_HINTS);
ByteMatrix input = qrCode.getMatrix();
int w=input.getWidth(),h=input.getHeight();
BufferedImage qrImg = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = qrImg.createGraphics();
qrImg = g2d.getDeviceConfiguration().createCompatibleImage(w,h, Transparency.BITMASK);
g2d.dispose();
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++) {
if (input.get(x,y) == 1) {
qrImg.setRGB(x, y, qrColor);
}else{
qrImg.setRGB(x, y, Transparency.BITMASK);
}
}
}
return qrImg;
}
static BufferedImage getScaledImg(BufferedImage oriImg,int aimWidth,int aimHeight){
Image scaled = oriImg.getScaledInstance(aimWidth,aimHeight,SCALE_DEFAULT);
Graphics2D g2d = new BufferedImage(aimWidth,aimHeight, BufferedImage.TYPE_INT_RGB).createGraphics();
BufferedImage scaledImg = g2d.getDeviceConfiguration().createCompatibleImage(aimWidth,aimHeight, Transparency.BITMASK);
g2d.dispose();
scaledImg.createGraphics().drawImage(scaled, 0, 0,null);
return scaledImg;
}