本文整理汇总了C#中CGBitmapContext.ConcatCTM方法的典型用法代码示例。如果您正苦于以下问题：C# CGBitmapContext.ConcatCTM方法的具体用法？C# CGBitmapContext.ConcatCTM怎么用？C# CGBitmapContext.ConcatCTM使用的例子？那么恭喜您, 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CGBitmapContext的用法示例。
在下文中一共展示了CGBitmapContext.ConcatCTM方法的9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: BeginImageContextWithOptions
public static void BeginImageContextWithOptions(CGSize size, bool opaque, nfloat scale)
{
// Create new image context
ColorSpace = CGColorSpace.CreateDeviceRGB ();
Context = new CGBitmapContext (null, (int)size.Width, (int)size.Height, 8, 0, ColorSpace, CGImageAlphaInfo.PremultipliedLast);
// Flip context vertically
var flipVertical = new CGAffineTransform(1,0,0,-1,0,size.Height);
Context.ConcatCTM (flipVertical);
// Save previous context
ImageSize = size;
PreviousContext = NSGraphicsContext.CurrentContext;
NSGraphicsContext.CurrentContext = NSGraphicsContext.FromCGContext (Context, true);
}示例2: InitWithCGImage
private void InitWithCGImage(CGImage image, All filter)
{
int width,height,i;
CGContext context = null;
IntPtr data;
CGColorSpace colorSpace;
IntPtr tempData;
bool hasAlpha;
CGImageAlphaInfo info;
CGAffineTransform transform;
Size imageSize;
SurfaceFormat pixelFormat;
bool sizeToFit = false;
if(image == null)
{
throw new ArgumentException(" uimage is invalid! " );
}
info = image.AlphaInfo;
hasAlpha = ((info == CGImageAlphaInfo.PremultipliedLast) || (info == CGImageAlphaInfo.PremultipliedFirst) || (info == CGImageAlphaInfo.Last) || (info == CGImageAlphaInfo.First) ? true : false);
if (image.ColorSpace != null)
{
pixelFormat = SurfaceFormat.Color;
}
else
{
pixelFormat = SurfaceFormat.Alpha8;
}
imageSize = new Size(image.Width,image.Height);
transform = CGAffineTransform.MakeIdentity();
width = imageSize.Width;
if((width != 1) && ((width & (width - 1))!=0)) {
i = 1;
while((sizeToFit ? 2 * i : i) < width)
i *= 2;
width = i;
}
height = imageSize.Height;
if((height != 1) && ((height & (height - 1))!=0)) {
i = 1;
while((sizeToFit ? 2 * i : i) < height)
i *= 2;
height = i;
}
// TODO: kMaxTextureSize = 1024
while((width > 1024) || (height > 1024))
{
width /= 2;
height /= 2;
transform = CGAffineTransform.MakeScale(0.5f,0.5f);
imageSize.Width /= 2;
imageSize.Height /= 2;
}
switch(pixelFormat)
{
case SurfaceFormat.Color:
colorSpace = CGColorSpace.CreateDeviceRGB();
data = Marshal.AllocHGlobal(height * width * 4);
context = new CGBitmapContext(data, width, height, 8, 4 * width, colorSpace,CGImageAlphaInfo.PremultipliedLast);
colorSpace.Dispose();
break;
case SurfaceFormat.Alpha8:
data = Marshal.AllocHGlobal(height * width);
context = new CGBitmapContext(data, width, height, 8, width, null, CGImageAlphaInfo.Only);
break;
default:
throw new NotSupportedException("Invalid pixel format");
}
context.ClearRect(new RectangleF(0,0,width,height));
context.TranslateCTM(0, height - imageSize.Height);
if (!transform.IsIdentity)
{
context.ConcatCTM(transform);
}
context.DrawImage(new RectangleF(0, 0, image.Width, image.Height), image);
//Convert "RRRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA" to "RRRRRGGGGGGBBBBB"
/*
if(pixelFormat == SurfaceFormat.Rgb32) {
tempData = Marshal.AllocHGlobal(height * width * 2);
int d32;
short d16;
int inPixel32Count=0,outPixel16Count=0;
for(i = 0; i < width * height; ++i, inPixel32Count+=sizeof(int))
{
d32 = Marshal.ReadInt32(data,inPixel32Count);
short R = (short)((((d32 >> 0) & 0xFF) >> 3) << 11);
short G = (short)((((d32 >> 8) & 0xFF) >> 2) << 5);
short B = (short)((((d32 >> 16) & 0xFF) >> 3) << 0);
d16 = (short) (R | G | B);
Marshal.WriteInt16(tempData,outPixel16Count,d16);
//.........这里部分代码省略.........
示例3: ESTexture2D
public ESTexture2D(UIImage uiImage, All filter)
{
CGImage image = uiImage.CGImage;
if(uiImage == null)
throw new ArgumentNullException("uiImage");
// TODO: could use this to implement lower-bandwidth textures
//bool hasAlpha = (image.AlphaInfo == CGImageAlphaInfo.First || image.AlphaInfo == CGImageAlphaInfo.Last
// || image.AlphaInfo == CGImageAlphaInfo.PremultipliedFirst || image.AlphaInfo == CGImageAlphaInfo.PremultipliedLast);
// Image dimentions:
logicalSize = new Point((int)uiImage.Size.Width, (int)uiImage.Size.Height);
pixelWidth = uiImage.CGImage.Width;
pixelHeight = uiImage.CGImage.Height;
// Round up the target texture width and height to powers of two:
potWidth = pixelWidth;
potHeight = pixelHeight;
if(( potWidth & ( potWidth-1)) != 0) { int w = 1; while(w < potWidth) { w *= 2; } potWidth = w; }
if((potHeight & (potHeight-1)) != 0) { int h = 1; while(h < potHeight) { h *= 2; } potHeight = h; }
// Scale down textures that are too large...
CGAffineTransform transform = CGAffineTransform.MakeIdentity();
while((potWidth > 1024) || (potHeight > 1024))
{
potWidth /= 2; // Note: no precision loss - it's a power of two
potHeight /= 2;
pixelWidth /= 2; // Note: precision loss - assume possibility of dropping a pixel at each step is ok
pixelHeight /= 2;
transform.Multiply(CGAffineTransform.MakeScale(0.5f, 0.5f));
}
RecalculateRatio();
lock(textureLoadBufferLockObject)
{
CreateTextureLoadBuffer();
unsafe
{
fixed(byte* data = textureLoadBuffer)
{
var colorSpace = CGColorSpace.CreateDeviceRGB();
var context = new CGBitmapContext(new IntPtr(data), potWidth, potHeight,
8, 4 * potWidth, colorSpace, CGImageAlphaInfo.PremultipliedLast);
context.ClearRect(new RectangleF(0, 0, potWidth, potHeight));
context.TranslateCTM(0, potHeight - pixelHeight); // TODO: this does not play nice with the precision-loss above (keeping half-pixel to the edge)
if(!transform.IsIdentity)
context.ConcatCTM(transform);
context.DrawImage(new RectangleF(0, 0, image.Width, image.Height), image);
SetupTexture(new IntPtr(data), filter);
context.Dispose();
colorSpace.Dispose();
}
}
}
}示例4: DrawPathAsBackground
// Draws our animation path on the background image, just to show it
protected void DrawPathAsBackground ()
{
// create our offscreen bitmap context
var bitmapSize = new SizeF (View.Frame.Size);
using (var context = new CGBitmapContext (
IntPtr.Zero,
(int)bitmapSize.Width, (int)bitmapSize.Height, 8,
(int)(4 * bitmapSize.Width), CGColorSpace.CreateDeviceRGB (),
CGImageAlphaInfo.PremultipliedFirst)) {
// convert to View space
var affineTransform = CGAffineTransform.MakeIdentity ();
// invert the y axis
affineTransform.Scale (1f, -1f);
// move the y axis up
affineTransform.Translate (0, View.Frame.Height);
context.ConcatCTM (affineTransform);
// actually draw the path
context.AddPath (animationPath);
context.SetStrokeColor (UIColor.LightGray.CGColor);
context.SetLineWidth (3f);
context.StrokePath ();
// set what we've drawn as the backgound image
backgroundImage.Image = UIImage.FromImage (context.ToImage());
}
}示例5: Texture2D
public Texture2D(UIImage uiImage)
{
if (uiImage == null) {
throw new ArgumentNullException("uiImage");
}
CGImage image = uiImage.CGImage;
if (image == null) {
throw new InvalidOperationException("Attempted to create a Texture2D from UIImage, but resulting CGImage is null");
}
CGImageAlphaInfo info = image.AlphaInfo;
bool hasAlpha = info == CGImageAlphaInfo.PremultipliedLast || info == CGImageAlphaInfo.PremultipliedFirst || info == CGImageAlphaInfo.Last || info == CGImageAlphaInfo.First;
int bpp = image.BitsPerComponent;
Texture2DPixelFormat pixelFormat;
if (image.ColorSpace != null) {
if (hasAlpha || bpp >= 8) {
pixelFormat = Texture2DPixelFormat.Default;
} else {
pixelFormat = Texture2DPixelFormat.RGB565;
}
} else {
pixelFormat = Texture2DPixelFormat.A8;
}
int width = image.Width;
if (width != 1 && (width & (width - 1)) != 0) {
int i = 1;
while (i < width) {
i *= 2;
}
width = i;
}
int height = image.Height;
if (height != 1 && (height & (height - 1)) != 0) {
int i = 1;
while (i < height) {
i *= 2;
}
height = i;
}
if (width > MaxTextureSize || height > MaxTextureSize) {
throw new InvalidOperationException("Image is too large. Width or height larger than MaxTextureSize");
}
CGColorSpace colorSpace = null;
CGContext context;
byte[] data;
unsafe {
// all formats require w*h*4, except A8 requires just w*h
int dataSize = width * height * 4;
if (pixelFormat == Texture2DPixelFormat.A8) {
dataSize = width * height;
}
data = new byte[dataSize];
fixed (byte* dp = data) {
switch (pixelFormat) {
case Texture2DPixelFormat.RGBA8888:
case Texture2DPixelFormat.RGBA4444:
case Texture2DPixelFormat.RGB5A1:
colorSpace = CGColorSpace.CreateDeviceRGB();
context = new CGBitmapContext((IntPtr)dp, (int)width, (int)height, 8, 4 * (int)width, colorSpace, CGImageAlphaInfo.PremultipliedLast);
break;
case Texture2DPixelFormat.RGB565:
colorSpace = CGColorSpace.CreateDeviceRGB();
context = new CGBitmapContext((IntPtr)dp, (int)width, (int)height, 8, 4 * (int)width, colorSpace, CGImageAlphaInfo.NoneSkipLast);
break;
case Texture2DPixelFormat.A8:
context = new CGBitmapContext((IntPtr)dp, (int)width, (int)height, 8, (int)width, null, CGImageAlphaInfo.Only);
break;
default:
throw new InvalidEnumArgumentException("pixelFormat", (int)pixelFormat, typeof(Texture2DPixelFormat));
}
if (colorSpace != null) {
colorSpace.Dispose();
}
context.ClearRect(new RectangleF(0, 0, width, height));
context.TranslateCTM(0, height - image.Height);
// why is this here? make an identity transform, then immediately not use it? Need to look into this
CGAffineTransform transform = CGAffineTransform.MakeIdentity();
if (!transform.IsIdentity) {
context.ConcatCTM(transform);
}
context.DrawImage(new RectangleF(0, 0, image.Width, image.Height), image);
}
}
//.........这里部分代码省略.........
示例6: InitWithCGImage
private void InitWithCGImage(CGImage image)
{
int width, height;
CGBitmapContext bitmap = null;
bool hasAlpha;
CGImageAlphaInfo alphaInfo;
CGColorSpace colorSpace;
int bitsPerComponent, bytesPerRow;
CGBitmapFlags bitmapInfo;
bool premultiplied = false;
int bitsPerPixel = 0;
if (image == null) {
throw new ArgumentException (" image is invalid! " );
}
alphaInfo = image.AlphaInfo;
hasAlpha = ((alphaInfo == CGImageAlphaInfo.PremultipliedLast) || (alphaInfo == CGImageAlphaInfo.PremultipliedFirst) || (alphaInfo == CGImageAlphaInfo.Last) || (alphaInfo == CGImageAlphaInfo.First) ? true : false);
imageSize.Width = (int)image.Width;
imageSize.Height = (int)image.Height;
width = (int)image.Width;
height = (int)image.Height;
// Not sure yet if we need to keep the original image information
// before we change it internally. TODO look at what windows does
// and follow that.
bitmapInfo = image.BitmapInfo;
bitsPerComponent = (int)image.BitsPerComponent;
bitsPerPixel = (int)image.BitsPerPixel;
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
int size = bytesPerRow * height;
colorSpace = image.ColorSpace;
// Right now internally we represent the images all the same
// I left the call here just in case we find that this is not
// possible. Read the comments for non alpha images.
if(colorSpace != null) {
if( hasAlpha ) {
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.PremultipliedLast;
}
else
{
// even for images without alpha we will internally
// represent them as RGB with alpha. There were problems
// if we do not do it this way and creating a bitmap context.
// The images were not drawing correctly and tearing. Also
// creating a Graphics to draw on was a nightmare. This
// should probably be looked into or maybe it is ok and we
// can continue representing internally with this representation
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
}
} else {
premultiplied = true;
colorSpace = CGColorSpace.CreateDeviceRGB ();
bitsPerComponent = 8;
bitsPerPixel = 32;
bitmapInfo = CGBitmapFlags.NoneSkipLast;
}
bytesPerRow = width * bitsPerPixel/bitsPerComponent;
size = bytesPerRow * height;
bitmapBlock = Marshal.AllocHGlobal (size);
bitmap = new CGBitmapContext (bitmapBlock,
width, height,
bitsPerComponent,
bytesPerRow,
colorSpace,
bitmapInfo);
bitmap.ClearRect (new CGRect (0,0,width,height));
// We need to flip the Y axis to go from right handed to lefted handed coordinate system
var transform = new CGAffineTransform(1, 0, 0, -1, 0, image.Height);
bitmap.ConcatCTM(transform);
bitmap.DrawImage (new CGRect (0, 0, image.Width, image.Height), image);
var provider = new CGDataProvider (bitmapBlock, size, true);
NativeCGImage = new CGImage (width, height, bitsPerComponent,
bitsPerPixel, bytesPerRow,
colorSpace,
bitmapInfo,
provider, null, true, image.RenderingIntent);
colorSpace.Dispose();
bitmap.Dispose();
}示例7: FixOrientation
UIImage FixOrientation(UIImage image)
{
if (image.Orientation == UIImageOrientation.Up)
return image;
CGAffineTransform transform = CGAffineTransform.MakeIdentity ();
switch (image.Orientation)
{
case UIImageOrientation.Down:
case UIImageOrientation.DownMirrored:
transform = CGAffineTransform.Translate (transform, image.Size.Width, image.Size.Height);
transform = CGAffineTransform.Rotate (transform, (nfloat)(Math.PI));
break;
case UIImageOrientation.Left:
case UIImageOrientation.LeftMirrored:
transform = CGAffineTransform.Translate (transform, image.Size.Width, 0);
transform = CGAffineTransform.Rotate (transform, (nfloat)(Math.PI / 2));
break;
case UIImageOrientation.Right:
case UIImageOrientation.RightMirrored:
transform = CGAffineTransform.Translate (transform, 0, image.Size.Height);
transform = CGAffineTransform.Rotate (transform, (nfloat)(-1 * Math.PI / 2));
break;
case UIImageOrientation.Up:
case UIImageOrientation.UpMirrored:
break;
}
switch (image.Orientation)
{
case UIImageOrientation.UpMirrored:
case UIImageOrientation.DownMirrored:
transform = CGAffineTransform.Translate (transform, image.Size.Width, 0);
transform = CGAffineTransform.Scale (transform, -1, 1);
break;
case UIImageOrientation.LeftMirrored:
case UIImageOrientation.RightMirrored:
transform = CGAffineTransform.Translate (transform, image.Size.Height, 0);
transform = CGAffineTransform.Scale (transform, -1, 1);
break;
case UIImageOrientation.Up:
case UIImageOrientation.Down:
case UIImageOrientation.Left:
case UIImageOrientation.Right:
break;
}
using (CGBitmapContext ctx = new CGBitmapContext (null, (nint)image.Size.Width, (nint)image.Size.Height, (nint)image.CGImage.BitsPerComponent, (nint)0,
image.CGImage.ColorSpace, image.CGImage.BitmapInfo))
{
ctx.ConcatCTM (transform);
switch (image.Orientation)
{
case UIImageOrientation.Left:
case UIImageOrientation.LeftMirrored:
case UIImageOrientation.Right:
case UIImageOrientation.RightMirrored:
ctx.DrawImage (new CGRect (0, 0, image.Size.Height, image.Size.Width), image.CGImage);
break;
default:
ctx.DrawImage (new CGRect (0, 0, image.Size.Width, image.Size.Height), image.CGImage);
break;
}
using (var cgImage = ctx.ToImage ())
{
return new UIImage (cgImage);
}
}
}示例8: GetThumbImage
/// <summary>
/// Returns thumb image object for page
/// </summary>
/// <param name="thumbContentSize">Thumb content size</param>
/// <param name="pageNumber">Page number for what will created image object</param>
/// <returns>Page image object</returns>
private static UIImage GetThumbImage(float thumbContentSize, int pageNumber)
{
if ((pageNumber <= 0) || (pageNumber > PDFDocument.PageCount)) {
return null;
}
// Calc page view size
var pageSize = PageContentView.GetPageViewSize(pageNumber);
if (pageSize.Width % 2 > 0) {
pageSize.Width--;
}
if (pageSize.Height % 2 > 0) {
pageSize.Height--;
}
// Calc target size
var targetSize = new Size((int)pageSize.Width, (int)pageSize.Height);
// Draw page on CGImage
CGImage pageImage;
using (CGColorSpace rgb = CGColorSpace.CreateDeviceRGB()) {
using (var context = new CGBitmapContext(null, targetSize.Width, targetSize.Height, 8, 0, rgb, CGBitmapFlags.ByteOrder32Little | CGBitmapFlags.NoneSkipFirst)) {
using (var pdfPage = PDFDocument.GetPage(pageNumber)) {
// Draw page on custom CGBitmap context
var thumbRect = new RectangleF(0.0f, 0.0f, targetSize.Width, targetSize.Height);
context.SetFillColor(1.0f, 1.0f, 1.0f, 1.0f);
context.FillRect(thumbRect);
context.ConcatCTM(pdfPage.GetDrawingTransform(CGPDFBox.Crop, thumbRect, 0, true));
context.SetRenderingIntent(CGColorRenderingIntent.Default);
context.InterpolationQuality = CGInterpolationQuality.Default;
context.DrawPDFPage(pdfPage);
// Create CGImage from custom CGBitmap context
pageImage = context.ToImage();
}
}
}
return UIImage.FromImage(pageImage);
}示例9: FromUIImage
static Texture2D FromUIImage(UIImage uiImage, string name)
{
All filter = All.Linear;
CGImage image = uiImage.CGImage;
if(uiImage == null)
throw new ArgumentNullException("uiImage");
// TODO: could use this to implement lower-bandwidth textures
//bool hasAlpha = (image.AlphaInfo == CGImageAlphaInfo.First || image.AlphaInfo == CGImageAlphaInfo.Last
// || image.AlphaInfo == CGImageAlphaInfo.PremultipliedFirst || image.AlphaInfo == CGImageAlphaInfo.PremultipliedLast);
// Image dimentions:
Point logicalSize = new Point((int)uiImage.Size.Width, (int)uiImage.Size.Height);
int pixelWidth = uiImage.CGImage.Width;
int pixelHeight = uiImage.CGImage.Height;
// Round up the target texture width and height to powers of two:
int potWidth = pixelWidth;
int potHeight = pixelHeight;
if(( potWidth & ( potWidth-1)) != 0) { int w = 1; while(w < potWidth) { w *= 2; } potWidth = w; }
if((potHeight & (potHeight-1)) != 0) { int h = 1; while(h < potHeight) { h *= 2; } potHeight = h; }
// Scale down textures that are too large...
CGAffineTransform transform = CGAffineTransform.MakeIdentity();
while((potWidth > 1024) || (potHeight > 1024))
{
potWidth /= 2; // Note: no precision loss - it's a power of two
potHeight /= 2;
pixelWidth /= 2; // Note: precision loss - assume possibility of dropping a pixel at each step is ok
pixelHeight /= 2;
transform.Multiply(CGAffineTransform.MakeScale(0.5f, 0.5f));
}
lock(textureLoadBufferLockObject)
{
CreateTextureLoadBuffer();
unsafe
{
fixed(byte* data = textureLoadBuffer)
{
using(var colorSpace = CGColorSpace.CreateDeviceRGB())
using(var context = new CGBitmapContext(new IntPtr(data), potWidth, potHeight,
8, 4 * potWidth, colorSpace, CGImageAlphaInfo.PremultipliedLast))
{
context.ClearRect(new RectangleF(0, 0, potWidth, potHeight));
context.TranslateCTM(0, potHeight - pixelHeight); // TODO: this does not play nice with the precision-loss above (keeping half-pixel to the edge)
if(!transform.IsIdentity)
context.ConcatCTM(transform);
context.DrawImage(new RectangleF(0, 0, image.Width, image.Height), image);
uint textureId = 0;
/*textureId = new uint[1];
textureId[0]= 0;
GL.GenTextures(1,textureId);*/
GL.GenTextures(1, ref textureId);
GL.BindTexture(All.Texture2D, textureId);
GL.TexParameter(All.Texture2D, All.TextureMinFilter, (int)filter);
GL.TexParameter(All.Texture2D, All.TextureMagFilter, (int)filter);
GL.TexImage2D(All.Texture2D, 0, (int)All.Rgba, (int)potWidth, (int)potHeight, 0, All.Rgba, All.UnsignedByte, new IntPtr(data));
return new Texture2D(logicalSize.X, logicalSize.Y,
pixelWidth, pixelHeight, potWidth, potHeight,
textureId, name);
}
}
}
}
}