**
Found the solution
Because of the fact this is a tile, the image will always be strechted to 173 by 173!
To avoid this first create a dummy 173 by 173 and merge this with the resized one!
Rect rect = new Rect(0.0, 0.0, width, height);
WriteableBitmap bitmapDummy = new WriteableBitmap(173, 173);
bitmapDummy.Blit(rect, resized, rect, WriteableBitmapExtensions.BlendMode.None);
**
Well I have created a Background agent to update the live tile of my WP7 app.
But no matter what I try to resize it, I'm not getting a good result!
Any tips? Currently I have following code, but I also tried 135 by 173 and also the other Interpolation.
WriteableBitmap writeableBitmap = new WriteableBitmap(bitmapImage);
var resized = writeableBitmap.Resize(173, 173, System.Windows.Media.Imaging.WriteableBitmapExtensions.Interpolation.Bilinear);
There is also a small rectangle added below to show the title of the app! It's 40px in height, would be great if image would be cropped above.
The actual image is always 250 by 321px
Your problem is that you're not calculating the width/heights to a correct Aspect ratio.
So to get a 1:1 proportions, you would need a width of 134.735 pixels, for a 173 pixel height.
This can be done by first determining what side is the largest
var aspect = Math.Max(bitmapImage.Width, bitmapImage.Height)
var ratio = largest / 173;
var width = width / ratio;
var height = height / ratio;
var resizedImage = writeableBitmap.Resize(width, height, System.Windows.Media.Imaging.WriteableBitmapExtensions.Interpolation.Bilinear);
And remember to set Stretch="Uniform" to avoid stretching the image to unnecessary proportions.
To create a 173x173 pixel image, with the other image applied on top, use the Blit function from WriteableBitmapEx
var tileImage = new WriteableBitmap(173, 173, ...)
tileImage.Blit(new Rect(width, height), resizedImage, new Rect(width, height), BlendMode.None);
Related
In Xiaomi devices, there are drawn an image outside of camera's letterbox
In other devices everything is correct
I attached both sumsung and xiaomi images, the screenshot that looks ugly is xiaomi, and good look in samsung
float targetaspect = 750f / 1334f;
// determine the game window's current aspect ratio
float windowaspect = (float)Screen.width / (float)Screen.height;
// current viewport height should be scaled by this amount
float scaleheight = windowaspect / targetaspect;
// obtain camera component so we can modify its viewport
Camera camera = GetComponent<Camera>();
// if scaled height is less than current height, add letterbox
if (scaleheight < 1.0f)
{
Rect rect = camera.rect;
rect.width = 1.0f;
rect.height = scaleheight;
rect.x = 0;
rect.y = (1.0f - scaleheight) / 2.0f;
camera.rect = rect;
}
try setting the image to clamp instead of repeat.
this will give the result of black borders but you won't have that weird texture
I don't know what caused that problem, however i solved it in a tricky way. I just added second camera to display black background. Only My main camera's viewport is letterboxed, but not second camera. So it made display to look good
How can I adjust an image to a button in Tkinter?
Actually i have this :
originalImg = Image.open(currentphotofolderPath + file)
img = ImageTk.PhotoImage(originalImg)
Button(photoFrame, image = img, borderwidth=0, height = 200, width = 200)
The problem the image does not adjust to the button with 200x200
I don't want to resize the image with PhotoImage.resize()
The zoom() function should fix your issue:
Return a new PhotoImage with the same image as this widget but zoom it
with X and Y.
Adding the code line below before instantiating the Button() widget should be helpful:
originalImg = Image.open(currentphotofolderPath + file)
originalImg.zoom(200, 200)
img = ImageTk.PhotoImage(originalImg)
Button(photoFrame, image=img, borderwidth=0, height=200, width=200)
you have a couple of choices, the zoom function as posted by Billal, or you create a resize function:
def Resize_Image(image, maxsize):
r1 = image.size[0]/maxsize[0] # width ratio
r2 = image.size[1]/maxsize[1] # height ratio
ratio = max(r1, r2)
newsize = (int(image.size[0]/ratio), int(image.size[1]/ratio))
image = image.resize(newsize, Image.ANTIALIAS)
return image
which will then resize the Image (not the PhotoImage) to the biggest possible size while retaining the aspect ratio (without knowing it beforehand)
note that the resize method should use less memory than the zoom method (if thats an important factor)
I'm using a canvas to make blur effect on boostrap carousel images. Basically, carousel images are set to background size cover so image will crop according to window size. I want to do the same to the canvas image. Any ideas? Thanks heaps!
This snippet should do the trick.
var aspectheight = h * (canvas.width / w);
var heigthoffset = ((aspectheight - canvas.height) / 2) * -1;
ctx.drawImage(image, 0, heigthoffset, canvas.width, aspectheight);
Where h and w are the width and height if the image being rendered, and image is that image.
I have a canvas where i have drawn a series of images onto it that can be dragged and dropped around, each image is a seperate entity.
I need to, depending on where the image is dropped rotate that image so that it looks appropiate, imaging dragging a triangle around a circle, the base line needs to always point outwards.
I thought i would be able to rotate the image and then draw that on the canvas, but what i seem to find when searching on the internet is that the canvas rotates each time - is it possible to rotate the image only and then place it on the canvas?
Many Thanks!
Yes you can, but it's not as simple as setting a rotation attribute. The way canvas works you can't rotate individual items specifically, only the whole canvas.
To rotate a single item, you'll need to rotate the canvas, place the item, and then rotate the canvas back to it's original orientation.
This question has a few examples: How do I rotate a single object on an html 5 canvas?
Before placing the image on the canvas, create a buffer canvas, place image there, rotate it and then port to main canvas.
var canvas = document.getElementById('test_canvas');
var ctx = canvas.getContext('2d');
var buffer = document.createElement('canvas');
buffer.width = buffer.height = 60;
var bctx = buffer.getContext('2d');
bctx.translate(30, 30);
bctx.rotate(0.5);
bctx.fillStyle = 'rgb(255, 0, 0)';
bctx.fillRect(-15, -15, 30, 30);
ctx.fillStyle = 'rgb(0, 255, 0)';
ctx.fillRect(30, 30, 30, 30);
ctx.drawImage(buffer, 50, 50);
You can check this code at JSFiddle I've setup - http://jsfiddle.net/dzenkovich/UdaUA/2/
Note you'll need to keep a close eye at the rotation point and buffer canvas size for this to work.
For more info check out this article I've found http://creativejs.com/2012/01/day-10-drawing-rotated-images-into-canvas/
I want to resize the images while maintaining the aspect ratio for displaying images on the web page. The maximum image size can be 640x480. What equation can be used to resize the images? I don't care about the newly resized image size. The resolution should be near to 640x480 pixels
I explain using C pseudo-code. First calculate the aspect ratio of the image you want to resize ("testImage"):
double rat = (double)testImage.Width / (double)testImage.Height;
Then we compare it with the aspect ratio of a 640x480 picture. If testImage's ratio ("rat") is bigger than the ratio of a 640x480 picture, then we know if we resize the picture so that its Width becomes 640, its height will not be more than 480. If testImage's aspect ratio is smaller, then we can resize the picture so that height becomes 480 without the width exceeding 640 pixels.
const double rat640x480 = 640.0 / 480.0;
if (rat > rat640x480)
testImage.Resize(Width := 640, Height := 640 / rat);
else
testImage.Resize(Width := 480 * rat, Height := 480);
Code in JAVA becomes
double ratio640x480 = 640.0 / 480.0;
double sourceRatio = (double) bitmap.getWidth() / (double) bitmap.getHeight();
if (sourceRatio > ratio640x480)
bitmap = Bitmap.createScaledBitmap(bitmap, 640, (int) (640 / sourceRatio), true);
else
bitmap = Bitmap.createScaledBitmap(bitmap, (int) (480 * sourceRatio), 480, true);