本文整理汇总了C#中Windows.UI.Xaml.Media.Imaging.WriteableBitmap.LoadAsync方法的典型用法代码示例。如果您正苦于以下问题：C# WriteableBitmap.LoadAsync方法的具体用法？C# WriteableBitmap.LoadAsync怎么用？C# WriteableBitmap.LoadAsync使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Windows.UI.Xaml.Media.Imaging.WriteableBitmap的用法示例。
在下文中一共展示了WriteableBitmap.LoadAsync方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: OpenButton_Click
private async void OpenButton_Click(object sender, RoutedEventArgs e)
{
StorageFolder temp = ApplicationData.Current.LocalCacheFolder;
StorageFile file = await temp.CreateFileAsync("current_image.png", CreationCollisionOption.ReplaceExisting);
await cameraService.MediaCapture.CapturePhotoToStorageFileAsync(ImageEncodingProperties.CreateJpeg(), file);
file = null;
file = await temp.GetFileAsync("current_image.png");
var wb = new WriteableBitmap(1, 1);
await wb.LoadAsync(file);
this.ImageCropper.SourceImage = wb;
await cameraService.StopPreviewAsync();
this.CameraPreview.Visibility = Visibility.Collapsed;
}示例2: OpenButton_Click
private async void OpenButton_Click(object sender, RoutedEventArgs e)
{
FileOpenPicker openPicker = new FileOpenPicker();
openPicker.ViewMode = PickerViewMode.Thumbnail;
openPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary;
openPicker.FileTypeFilter.Add(".jpg");
openPicker.FileTypeFilter.Add(".bmp");
openPicker.FileTypeFilter.Add(".gif");
openPicker.FileTypeFilter.Add(".png");
StorageFile imgFile = await openPicker.PickSingleFileAsync();
if (imgFile != null)
{
var wb = new WriteableBitmap(1,1);
await wb.LoadAsync(imgFile);
this.ImageCropper.SourceImage = wb;
}
}示例3: LoadTexture
public async Task LoadTexture(string filename)
{
var folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
var texFile = await folder.GetFileAsync(filename);
var properties = await texFile.Properties.GetImagePropertiesAsync();
WriteableBitmap wbmp = new WriteableBitmap((Int32)properties.Width, (Int32)properties.Height);
await wbmp.LoadAsync(texFile);
byte[] pixels = new byte[wbmp.PixelWidth * wbmp.PixelHeight * 4];
using (Stream pixelStream = wbmp.PixelBuffer.AsStream())
{
await pixelStream.ReadAsync(pixels, 0, pixels.Length);
}
wbmp.Invalidate();
TexturePixels = new Vector3[wbmp.PixelHeight, wbmp.PixelWidth];
int r = 0, c = 0;
for (int i = 0; i < pixels.Length; i++)
{
TexturePixels[r, c] = new Vector3(pixels[i + 2], pixels[i + 1], pixels[i + 0]) / 255.0f;
c = (c + 1) % wbmp.PixelWidth;
if (c == 0)
{
r = (r + 1) % wbmp.PixelHeight;
}
i += 3;
}
TexSize = new Vector2(wbmp.PixelWidth, wbmp.PixelHeight);
}示例4: CropImage
private async void CropImage(bool wide = false)
{
IsCropEnabled = false;
try
{
var img = wide ? _previewImageWide : _previewImageNormal;
WriteableBitmap resizedBitmap = new WriteableBitmap(CropWidth, CropHeight);
//if (img.UriSource == null)
//await resizedBitmap.LoadAsync(_originaPickedStorageFile);
/*else*/
if (!img.UriSource.ToString().Contains("ms-appdata"))
{
var imgFile = await SaveImage(img, wide);
await resizedBitmap.LoadAsync(imgFile);
}
else
await resizedBitmap.LoadAsync(await StorageFile.GetFileFromApplicationUriAsync(img.UriSource));
if (wide)
resizedBitmap = resizedBitmap.Crop(CropLeftWide, CropTopWide, CropWidthWide + CropLeftWide, CropTopWide + CropHeightWide);
else
resizedBitmap = resizedBitmap.Crop(CropLeft, CropTop, CropWidth + CropLeft, CropTop + CropHeight);
var file = await ApplicationData.Current.TemporaryFolder.CreateFileAsync($"_cropTemp{(wide ? "Wide" : "")}.png", CreationCollisionOption.GenerateUniqueName);
if (wide)
_lastCroppedFileNameWide = file.Name;
else
_lastCroppedFileName = file.Name;
await resizedBitmap.SaveAsync(file, BitmapEncoder.PngEncoderId);
if (wide)
{
PreviewImageWide = new BitmapImage(new Uri($"ms-appdata:///temp/{file.Name}"));
}
else
{
PreviewImageNormal = new BitmapImage(new Uri($"ms-appdata:///temp/{file.Name}"));
UndoCropVisibility = Visibility.Visible;
}
}
catch (Exception)
{
UWPUtilities.GiveStatusBarFeedback("An error occured...");
}
IsCropEnabled = true;
}示例5: CreateTriangles
public async Task CreateTriangles(string filename, float scale, Vector3 position)
{
var folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
var file = await folder.GetFileAsync(filename);
var wholeFile = await FileIO.ReadTextAsync(file);
int v = 0;
int t = 0;
int n = 0;
string[] read = wholeFile.Split('\n');
byte[] pixels = new byte[1];
WriteableBitmap wbmp = null;
Vector2 X = new Vector2(float.MaxValue, float.MinValue), Y = new Vector2(float.MaxValue, float.MinValue), Z = new Vector2(float.MaxValue, float.MinValue);
FunkyTexture texture = new FunkyTexture();
string mtlFilename = string.Empty;
foreach (string s in read)
{
if (s.Length == 0) continue;
if (s[0] == 'v' && s[1] == ' ')
{
v++;
string[] temp = s.Split(' ');
float x = float.Parse(temp[1]);
if (x < X.X) X.X = x;
if (x > X.Y) X.Y = x;
float y = float.Parse(temp[2]);
if (y < Y.X) Y.X = y;
if (y > Y.Y) Y.Y = y;
float z = float.Parse(temp[3]);
if (z < Z.X) Z.X = z;
if (z > Z.Y) Z.Y = z;
}
else if (s[0] == 'v' && s[1] == 't')
{
t++;
}
else if (s[0] == 'v' && s[1] == 'n')
{
n++;
}
else if (s.Contains("mtllib"))
{
mtlFilename = s.Split(' ')[1];
var mtlFile = await folder.GetFileAsync(mtlFilename);
var mtlText = await FileIO.ReadTextAsync(mtlFile);
foreach (string ms in mtlText.Trim().Split('\n'))
{
if (ms.Contains("map_Kd"))
{
string texFilename = ms.Split(' ')[1];
var texFile = await folder.GetFileAsync(texFilename);
var properties = await texFile.Properties.GetImagePropertiesAsync();
wbmp = new WriteableBitmap((Int32)properties.Width, (Int32)properties.Height);
await wbmp.LoadAsync(texFile);
pixels = new byte[wbmp.PixelWidth * wbmp.PixelHeight * 4];
using (Stream pixelStream = wbmp.PixelBuffer.AsStream())
{
await pixelStream.ReadAsync(pixels, 0, pixels.Length);
}
wbmp.Invalidate();
texture.TexturePixels = new Vector3[wbmp.PixelHeight, wbmp.PixelWidth];
int r = 0, c = 0;
for (int i = 0; i < pixels.Length; i++)
{
texture.TexturePixels[r, c] = new Vector3(pixels[i+2], pixels[i+1], pixels[i+0])/255.0f;
c = (c + 1) % wbmp.PixelWidth;
if (c == 0)
{
r = (r + 1) % wbmp.PixelHeight;
}
i+=3;
}
texture.TexSize = new Vector2(wbmp.PixelWidth, wbmp.PixelHeight);
}
}
}
//.........这里部分代码省略.........